Re: urgent - data-source and container managed datasource
Hello,
I have configured my data source on OC4J standalone
version. Given below are snippets from the relevant
files:
In my data-sources.xml , I have
data-source
class=com.evermind.sql.DriverManagerDataSource
name=TestDS
location=jdbc/OracleCoreDS
xa-location=jdbc/xa/OracleXADS
ejb-location=jdbc/TestDS
connection-driver=oracle.jdbc.driver.OracleDriver
url=jdbc:oracle:thin:@servername:1521:test
username=username
password=password
min-connections=5
max-connections=20
inactivity-timeout=30
/
I lookup this data source in a DatabaseServlet,
which is loaded on server startup, and intialize a
static variable in my DBConnection class, which
manages database connections.
I use the code below:
snip
InitialContext ic = new InitialContext();
DataSource ds =
(DataSource)ic.lookup(jdbc/TestDS);
..
DBConnection.dataSource=ds; //initializeDataSource in
the DBConnection class
snip
In my DBConnection class, I have methods like
openConnection(), closeConnection() et al to handle
connections from the data source.
snip
public Connection openConnection()
{
Connection con=null;
try
{
con = dataSource.getConnection();
}
catch(Exception e)
{
System.out.println(Error: Unable to get
connection + e.getMessage());
}
return con;
}
snip
In order to load the DatabaseServlet on starup, I have
the following in the web.xml file:
servlet
servlet-namedatabase/servlet-name
servlet-classobs.application.DatabaseServlet/servlet-class
load-on-startup1/load-on-startup
/servlet
HTH,
Shyam
--- Janice [EMAIL PROTECTED] wrote:
Hi There,
I'm getting ready to ship off my application and I'm
trying to use the
application server (standalone oc4j) to hold the
data source information
instead of having it in struts-config.xml. Is this
possible?
When jDeveloper deploys to the server it builds me a
data-sources.xml file
which I presume is correct. When I test the
connection, its fine.
In web.xml I entered:
resource-ref
res-ref-namejdbc/bartCoreDS/res-ref-name
res-typejavax.sql.DataSource/res-type
res-authContainer/res-auth
/resource-ref
Where jdbc/bartCoreDS matches the location entry
of the data-source in
data-sources.xml.
Then I took out the data-sources from
struts-config.xml. I'm not terribly
surprised that now my application can't find the
database. The problem is I
don't know where to look for instructions on how to
do this or if its even
possible. Is there a way to put a data-source
configuration in
struts-config.xml that tells it to look at the
container, so that the
username and password aren't in it??
If I can provide more information, I will. Time is
running a bit short, so
I'd really, really appreciate a quick response.
Janice
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Re: Reporting + Struts
Niall, Thanks for sharing your experience with Jasper reports. Looks like using iText will make things easier for me. I noticed that I also missed a few posts on the same thread. Thanks, Shyam --- Niall Pemberton [EMAIL PROTECTED] wrote: I sent this earlier, but it didn't seem to reach the list. A number of messages I sent never seemed to arrive (most do) - does anyone else find this? Niall - Original Message - From: Niall Pemberton [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Sent: Thursday, March 11, 2004 12:51 PM Subject: [OT]Re: Reporting + Struts I looked briefly at Jasper reports. Its supposed to be good but I decided against using it. You have to set up a load of xml to create a report, doing it by hand would be very cumbersome - you have to use something like iReports to generate the XML. My users wanted a specific look for a report with alot of data accross the page and I struggled to do it in Jasper Reports - maybe simpler stuff it would be much better. Also I wanted pdf versions, but what it actually did was create an image and stuff it in a pdf file, rather than actually writing the data to the pdf file, which means you can't use facilities such as search. There were also other things I wanted to do in pdf, that I couldn't user Jasper I ended up ditching it and creating reports using iText to create pdf files directly. http://www.lowagie.com/iText/ BTW, I wasn't doing it in a web environment and the pdf generation is slow, can take up to 30 seconds for a large report. I am going to be putting reporting into my webapp, but I'm thinking of doing it by the users submitting a request for a report, storing the request in a database, then have a separate machine which wakes up periodically (say every five minutes), checks the requests, generates the report and emails it out to the user. That way my webapp isn't affected by the report generation clogging up the CPU. Niall - Original Message - From: Shyam A [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, March 10, 2004 7:57 PM Subject: Reporting + Struts Hi, I have a web application in which I need to generate reports on the fly, i.e., the user submits some report criteria on a web page and report has to be generated dynamically. I searched the archives and found that Jasper reports is a good tool to use, and there are some GUI tools available which will help in report design eg. iReports. I have a couple of questions: 1. Is it advisable to use Struts for the reporting application? Or just a JSP/Servlet based application would suffice? 2. Is there a big learning curve for using Jasper reports/IReports? I would appreciate it if somebody could share their experience in using the above mentioned tools. Thanks, Shyam __ Do you Yahoo!? Yahoo! Search - Find what you're looking for faster http://search.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Search - Find what youre looking for faster http://search.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Reporting + Struts
Hi, I have a web application in which I need to generate reports on the fly, i.e., the user submits some report criteria on a web page and report has to be generated dynamically. I searched the archives and found that Jasper reports is a good tool to use, and there are some GUI tools available which will help in report design eg. iReports. I have a couple of questions: 1. Is it advisable to use Struts for the reporting application? Or just a JSP/Servlet based application would suffice? 2. Is there a big learning curve for using Jasper reports/IReports? I would appreciate it if somebody could share their experience in using the above mentioned tools. Thanks, Shyam __ Do you Yahoo!? Yahoo! Search - Find what youre looking for faster http://search.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [OT] Database locking and deadlock
Hello Vijay, Thanks for your mail. I know I can synchronize the transactions using synchronized method in Java or use semaphores. This will avoid the row-level locks, but,I understand it may cause performance bottlenecks when there are many concurrent users. I always update the tables in the same order.So, there is no question of cyclic issue. The issue here is concurrent users may update the same rows of the concerned table, and at some point, the database cannot handle the updates, depending on the number of users. Do you think using a stored procedure for the transaction will help? Thanks, Shyam --- Balakrishnan, Vijay [EMAIL PROTECTED] wrote: Hi Shyam, You can synchronise the whole transaction with the 2 updates.That will take care of 1 of the issues.The other issue might be cyclic i.e are you updating table C first and then updating table A or B somewhere in your application.You will then have to make the updates in the same order i.e always update A first before C.This issue is a wild guess of mine-so I might be way off base here depending on row level locking etc. Vijay -Original Message- From: Shyam A [mailto:[EMAIL PROTECTED] Sent: Monday, March 08, 2004 6:36 PM To: Struts Users Mailing List Subject: Re: [OT] Database locking and deadlock Vic, Yes, I do get a deadly embrace or deadlock, as the row locks on the table multiply when they occur, holding up connections in the connection pool, eventually consuming all connections, and then all hell breaks loose. Were you referring to synchronizing with semaphores? I read somewhere that the Oracle database is supposed to handle deadlocks by rolling back one of the affected transactions. But the row locks seem to occur intermittently, possibly when there are large numbers of concurrent users. I cannot avoid the transaction as the database updates have to be done as one unit. An alternative that comes to mind is using a stored procedure for the update operations. Anyway, I need to do some research on passing Java objects to stored procedures. Thanks, Shyam --- Vic Cekvenich [EMAIL PROTECTED] wrote: Do you have a deadly embrace? Maybe just syncronise w/ semaphorse or the like. .V Shyam A wrote: Vic, Thanks again. I'm not in a position to switch to IBatis as my application is currently in use. Right now, I'm manually killing the user sessions which lock up the table in the database. My database is Oracle 9i, and this problem seems to occur only with large numbers of concurrent users. In my DAO,I update three tables as part of a transaction - table A and/or table B (in loops), and table C. Commit operation is done only after all tables are updated successfully. So, it may be possible that the DBMS locks up rows of table A or B (before commit) and waits until it updates table C for the commit. Is this the cause of the problem? I've not been able to determine (using SQl Plus, TOAD ) which query is causing the row-level lock. Any ideas? Thanks, Shyam --- Vic Cekvenich [EMAIL PROTECTED] wrote: Is there a way you can reproduce this w/ iSQL - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Search - Find what you're looking for faster http://search.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Search - Find what youre looking for faster http://search.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] Database locking and deadlock
Duncan,
Thanks for the suggestion. I was aware of that and did
consider the option. However, after consulting with my
DBA and doing some research, it seems the problem lies
with the number of concurrent transactions that can be
done on a table. This can be configured in the
INITRANS parameter for the table. It has been
increased from the default value of 1 to 5. We are
waiting to see if this fixes my problem.
Thanks,
Shyam
--- Duncan Mills [EMAIL PROTECTED] wrote:
From a pure Oracle perspective I would program this
more defensively
e.g Do a select for update nowait before you issue
the update to grab
the lock in advance. That way you'll get an oracle
error (ora -54) if
another user has the row and you can handle it
appropriately
Duncan
Shyam A wrote:
Hi,
I know the subject of my mail is off-topic but I
hope
somebody will be able to help me out with my
problem.
I experienced a wierd problem today when a deadlock
occured in my database - Oracle 9i, and it locked
up
all connections in the connection pool on my server
-
OC4J (Oracle 9iAS). I have a connection pool, which
is
configured on my server- OC4J. It is intialized on
server startup, using a Servlet.
I would like to verify if the code I use in my DAO
may
cause any deadlock condition. In my DAO, I use
Update queries as part of a transaction. i.e, I
turn
off auto-commit, do my Update queries, and commit
or
rollback depending on the outcome of the queries.
In one of the queries, I may need to update
multiple
rows of a table, and hence do the update operation
in
a loop (over a collection).
Given below is the relevant portion of the code:
snip
//method that updates votes for candidates in an
election
public int updateVotes(BallotList ballotList)
{
int result=0; //result of insert operation
String query=;
Ballot ballot=null;
CandidateList candList=null;
Candidate candidate=null;
int currVote=0;
int electionNo = ballotList.getElectionNo();
try
{
for(int
i=0;iballotList.getSize();i++)
{
ballot = ballotList.getBallot(i);
candList = ballot.getCandidateList();
for(int j=0;jcandList.getSize();j++)
{
candidate = candList.getCandidate(j);
//update votes for candidate
if(candidate.getVote() 0)
{
//get current vote count and update
currVote =
getCurrentVote(electionNo,candidate.getPostNo(),candidate.getPidm());
currVote++;
query = Update DZRCAND set DZRCAND_NUM_VOTE =
+currVote+ +
where DZRCAND_ELCTN_NO =
+electionNo+ +
and DZRCAND_POST_NO =
+candidate.getPostNo()+ +
and DZRCAND_CAND_PIDM =
+candidate.getPidm()+;
result += dbConnection.doUpdate(query);
}
} //end of inner for loop
} //end of outer for loop
}
catch(Exception e)
{
System.out.println(Exception in
DZRCAND
update for votes: + e.getMessage());
System.out.println(query: + query);
}
return result;
}
/snip
Is there a possibilty of a deadlock occuring in the
above code when there are mutliple users
concurrently
accessing the system.i.e, multiple users update
multiple rows of the table at the same time
Could somebody throw some light on this?
My understanding is that deadlocks are
automatically
handled by the DBMS. Anyway, is there a way to
prevent
the possiblity of deadlocks in my program ?
One more thing - in the code above and in other
Select queries, I open and close the Connection
from
the connection pool. However, I do not close the
Statement or ResultSet objects. Will this lead to
problems ? My understanding is that closing the
Connection object will free up all the associated
resources.
Any help/pointers/suggestions will be greatly
appreciated.
Thanks,
Shyam
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[OT] Database locking and deadlock
Hi,
I know the subject of my mail is off-topic but I hope
somebody will be able to help me out with my problem.
I experienced a wierd problem today when a deadlock
occured in my database - Oracle 9i, and it locked up
all connections in the connection pool on my server -
OC4J (Oracle 9iAS). I have a connection pool, which is
configured on my server- OC4J. It is intialized on
server startup, using a Servlet.
I would like to verify if the code I use in my DAO may
cause any deadlock condition. In my DAO, I use
Update queries as part of a transaction. i.e, I turn
off auto-commit, do my Update queries, and commit or
rollback depending on the outcome of the queries.
In one of the queries, I may need to update multiple
rows of a table, and hence do the update operation in
a loop (over a collection).
Given below is the relevant portion of the code:
snip
//method that updates votes for candidates in an
election
public int updateVotes(BallotList ballotList)
{
int result=0; //result of insert operation
String query=;
Ballot ballot=null;
CandidateList candList=null;
Candidate candidate=null;
int currVote=0;
int electionNo = ballotList.getElectionNo();
try
{
for(int i=0;iballotList.getSize();i++)
{
ballot = ballotList.getBallot(i);
candList = ballot.getCandidateList();
for(int j=0;jcandList.getSize();j++)
{
candidate = candList.getCandidate(j);
//update votes for candidate
if(candidate.getVote() 0)
{
//get current vote count and update
currVote =
getCurrentVote(electionNo,candidate.getPostNo(),candidate.getPidm());
currVote++;
query = Update DZRCAND set DZRCAND_NUM_VOTE =
+currVote+ +
where DZRCAND_ELCTN_NO =
+electionNo+ +
and DZRCAND_POST_NO =
+candidate.getPostNo()+ +
and DZRCAND_CAND_PIDM =
+candidate.getPidm()+;
result += dbConnection.doUpdate(query);
}
} //end of inner for loop
} //end of outer for loop
}
catch(Exception e)
{
System.out.println(Exception in DZRCAND
update for votes: + e.getMessage());
System.out.println(query: + query);
}
return result;
}
/snip
Is there a possibilty of a deadlock occuring in the
above code when there are mutliple users concurrently
accessing the system.i.e, multiple users update
multiple rows of the table at the same time
Could somebody throw some light on this?
My understanding is that deadlocks are automatically
handled by the DBMS. Anyway, is there a way to prevent
the possiblity of deadlocks in my program ?
One more thing - in the code above and in other
Select queries, I open and close the Connection from
the connection pool. However, I do not close the
Statement or ResultSet objects. Will this lead to
problems ? My understanding is that closing the
Connection object will free up all the associated
resources.
Any help/pointers/suggestions will be greatly
appreciated.
Thanks,
Shyam
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RE: [OT] Database locking and deadlock
Robert,
Thanks for your response. No, the update queries use a
single connection for which auto-commit is turned off.
Commit is done only if all the update queries are
successful.
Thanks,
Shyam
--- Robert Taylor [EMAIL PROTECTED] wrote:
Is it possible that dbConnection.doUpdate() gets a
new connection
each time which could possibly use up (exceed max
allowed) the connections in the pool.
Just a guess.
robert
-Original Message-
From: Shyam A [mailto:[EMAIL PROTECTED]
Sent: Monday, March 08, 2004 4:32 PM
To: [EMAIL PROTECTED]
Subject: [OT] Database locking and deadlock
Hi,
I know the subject of my mail is off-topic but I
hope
somebody will be able to help me out with my
problem.
I experienced a wierd problem today when a
deadlock
occured in my database - Oracle 9i, and it locked
up
all connections in the connection pool on my
server -
OC4J (Oracle 9iAS). I have a connection pool,
which is
configured on my server- OC4J. It is intialized on
server startup, using a Servlet.
I would like to verify if the code I use in my DAO
may
cause any deadlock condition. In my DAO, I use
Update queries as part of a transaction. i.e, I
turn
off auto-commit, do my Update queries, and
commit or
rollback depending on the outcome of the queries.
In one of the queries, I may need to update
multiple
rows of a table, and hence do the update operation
in
a loop (over a collection).
Given below is the relevant portion of the code:
snip
//method that updates votes for candidates in an
election
public int updateVotes(BallotList ballotList)
{
int result=0; //result of insert operation
String query=;
Ballot ballot=null;
CandidateList candList=null;
Candidate candidate=null;
int currVote=0;
int electionNo = ballotList.getElectionNo();
try
{
for(int
i=0;iballotList.getSize();i++)
{
ballot = ballotList.getBallot(i);
candList = ballot.getCandidateList();
for(int j=0;jcandList.getSize();j++)
{
candidate = candList.getCandidate(j);
//update votes for candidate
if(candidate.getVote() 0)
{
//get current vote count and update
currVote =
getCurrentVote(electionNo,candidate.getPostNo(),candidate.getPidm());
currVote++;
query = Update DZRCAND set DZRCAND_NUM_VOTE
=
+currVote+ +
where DZRCAND_ELCTN_NO =
+electionNo+
+
and DZRCAND_POST_NO =
+candidate.getPostNo()+ +
and DZRCAND_CAND_PIDM =
+candidate.getPidm()+;
result += dbConnection.doUpdate(query);
}
} //end of inner for loop
} //end of outer for loop
}
catch(Exception e)
{
System.out.println(Exception in
DZRCAND
update for votes: + e.getMessage());
System.out.println(query: + query);
}
return result;
}
/snip
Is there a possibilty of a deadlock occuring in
the
above code when there are mutliple users
concurrently
accessing the system.i.e, multiple users update
multiple rows of the table at the same time
Could somebody throw some light on this?
My understanding is that deadlocks are
automatically
handled by the DBMS. Anyway, is there a way to
prevent
the possiblity of deadlocks in my program ?
One more thing - in the code above and in other
Select queries, I open and close the Connection
from
the connection pool. However, I do not close the
Statement or ResultSet objects. Will this lead to
problems ? My understanding is that closing the
Connection object will free up all the associated
resources.
Any help/pointers/suggestions will be greatly
appreciated.
Thanks,
Shyam
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Re: [OT] Database locking and deadlock
Vic,
Thanks for the pointer,but is there any way of
salvaging the current situation?.It seems the Update
operation is causing the DBMS to have row-level locks
on the table,eventually leading to deadlock.
Thanks,
Shyam
--- Vic Cekvenich [EMAIL PROTECTED] wrote:
Of course you could switch to a popular DAO such as
iBatis or Hiberante
and avoid the issue all together.
There are JDBC forums on Sun.
.V
Shyam A wrote:
Robert,
Thanks for your response. No, the update queries
use a
single connection for which auto-commit is turned
off.
Commit is done only if all the update queries are
successful.
Thanks,
Shyam
--- Robert Taylor [EMAIL PROTECTED] wrote:
Is it possible that dbConnection.doUpdate() gets a
new connection
each time which could possibly use up (exceed max
allowed) the connections in the pool.
Just a guess.
robert
-Original Message-
From: Shyam A [mailto:[EMAIL PROTECTED]
Sent: Monday, March 08, 2004 4:32 PM
To: [EMAIL PROTECTED]
Subject: [OT] Database locking and deadlock
Hi,
I know the subject of my mail is off-topic but I
hope
somebody will be able to help me out with my
problem.
I experienced a wierd problem today when a
deadlock
occured in my database - Oracle 9i, and it locked
up
all connections in the connection pool on my
server -
OC4J (Oracle 9iAS). I have a connection pool,
which is
configured on my server- OC4J. It is intialized
on
server startup, using a Servlet.
I would like to verify if the code I use in my
DAO
may
cause any deadlock condition. In my DAO, I use
Update queries as part of a transaction. i.e, I
turn
off auto-commit, do my Update queries, and
commit or
rollback depending on the outcome of the queries.
In one of the queries, I may need to update
multiple
rows of a table, and hence do the update
operation
in
a loop (over a collection).
Given below is the relevant portion of the code:
snip
//method that updates votes for candidates in
an
election
public int updateVotes(BallotList ballotList)
{
int result=0; //result of insert operation
String query=;
Ballot ballot=null;
CandidateList candList=null;
Candidate candidate=null;
int currVote=0;
int electionNo = ballotList.getElectionNo();
try
{
for(int
i=0;iballotList.getSize();i++)
{
ballot = ballotList.getBallot(i);
candList = ballot.getCandidateList();
for(int j=0;jcandList.getSize();j++)
{
candidate = candList.getCandidate(j);
//update votes for candidate
if(candidate.getVote() 0)
{
//get current vote count and update
currVote =
getCurrentVote(electionNo,candidate.getPostNo(),candidate.getPidm());
currVote++;
query = Update DZRCAND set DZRCAND_NUM_VOTE
=
+currVote+ +
where DZRCAND_ELCTN_NO =
+electionNo+
+
and DZRCAND_POST_NO =
+candidate.getPostNo()+ +
and DZRCAND_CAND_PIDM =
+candidate.getPidm()+;
result += dbConnection.doUpdate(query);
}
} //end of inner for loop
} //end of outer for loop
}
catch(Exception e)
{
System.out.println(Exception in
DZRCAND
update for votes: + e.getMessage());
System.out.println(query: + query);
}
return result;
}
/snip
Is there a possibilty of a deadlock occuring in
the
above code when there are mutliple users
concurrently
accessing the system.i.e, multiple users update
multiple rows of the table at the same time
Could somebody throw some light on this?
__
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Re: [OT] Database locking and deadlock
Vic, Thanks again. I'm not in a position to switch to IBatis as my application is currently in use. Right now, I'm manually killing the user sessions which lock up the table in the database. My database is Oracle 9i, and this problem seems to occur only with large numbers of concurrent users. In my DAO,I update three tables as part of a transaction - table A and/or table B (in loops), and table C. Commit operation is done only after all tables are updated successfully. So, it may be possible that the DBMS locks up rows of table A or B (before commit) and waits until it updates table C for the commit. Is this the cause of the problem? I've not been able to determine (using SQl Plus, TOAD ) which query is causing the row-level lock. Any ideas? Thanks, Shyam --- Vic Cekvenich [EMAIL PROTECTED] wrote: Is there a way you can reproduce this w/ iSQL command line? I assume Sybase, since you said row-level. My guess is that it's not the sql, but your DAO logic somehow. It would take you only a day or so to switch that one update to http://www.reumann.net/do/struts/ibatisLesson1 .V Shyam A wrote: Vic, Thanks for the pointer,but is there any way of salvaging the current situation?.It seems the Update operation is causing the DBMS to have row-level locks on the table,eventually leading to deadlock. Thanks, Shyam - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Search - Find what youre looking for faster http://search.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] Database locking and deadlock
Vic, Yes, I do get a deadly embrace or deadlock, as the row locks on the table multiply when they occur, holding up connections in the connection pool, eventually consuming all connections, and then all hell breaks loose. Were you referring to synchronizing with semaphores? I read somewhere that the Oracle database is supposed to handle deadlocks by rolling back one of the affected transactions. But the row locks seem to occur intermittently, possibly when there are large numbers of concurrent users. I cannot avoid the transaction as the database updates have to be done as one unit. An alternative that comes to mind is using a stored procedure for the update operations. Anyway, I need to do some research on passing Java objects to stored procedures. Thanks, Shyam --- Vic Cekvenich [EMAIL PROTECTED] wrote: Do you have a deadly embrace? Maybe just syncronise w/ semaphorse or the like. .V Shyam A wrote: Vic, Thanks again. I'm not in a position to switch to IBatis as my application is currently in use. Right now, I'm manually killing the user sessions which lock up the table in the database. My database is Oracle 9i, and this problem seems to occur only with large numbers of concurrent users. In my DAO,I update three tables as part of a transaction - table A and/or table B (in loops), and table C. Commit operation is done only after all tables are updated successfully. So, it may be possible that the DBMS locks up rows of table A or B (before commit) and waits until it updates table C for the commit. Is this the cause of the problem? I've not been able to determine (using SQl Plus, TOAD ) which query is causing the row-level lock. Any ideas? Thanks, Shyam --- Vic Cekvenich [EMAIL PROTECTED] wrote: Is there a way you can reproduce this w/ iSQL - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Search - Find what youre looking for faster http://search.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Life, the Universe and Everything (was: RE: [OT] RE: Memory usage)
+1 On action alone be thy interest, Never on its fruits. Let not the fruits of action be thy motive, Nor be thy attachment to inaction. - Bhagavad Gita (250 BC - 250 AD), Chapter 2 http://timesofindia.indiatimes.com/articleshow/8487868.cms --- atta-ur rehman [EMAIL PROTECTED] wrote: +1 ATTA On Mar 1, 2004, at 8:19 PM, Vic Cekvenich wrote: -Original Message- From: Chappell, Simon P [mailto:[EMAIL PROTECTED] 4. I had the same frustrations that you have. I made the decision that the best way to restore the balance of good in the universe, was to try to become the kind of tech lead that I would have wanted when I was a newbie/humble grunt. +1 .V - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Search - Find what youre looking for faster http://search.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Action not forwarding to another Action
Use request.getAttribute(id). hth, Shyam Let me elaborate my question #3: If my .JSP has a html:form action=/app/UpdateOrder?id=30 , I know when I click a 'submit' button to get to an Action class, I can retrieve the id in my Action class by doing String id = Request.getParameter(id); But if my .jsp uses a link to pass the id such as a href=app/UpdateOrder.exec?id=30.. In other words, I get to the Action class through a 'link' rather than a 'submit', can I still use String id = Request.getParameter(id); to retrieve the id? I tried it and I can't find id from the Request object. -Original Message- From: Ramadoss Chinnakuzhandai [mailto:[EMAIL PROTECTED] Sent: Monday, March 01, 2004 6:24 PM To: Struts Users Mailing List Subject: RE: Action not forwarding to another Action If Im not wrongif .exe is what you hv configured in web.xml then I see there is no reason why it is not picking up / possible reason could be... make sure that you are forwarding to Content which is mapped to /app/ListOfOrder.exe in your OrderMaintainAction 1) Can someone also tell me if I have a Request attribute defined in OrderMaintainAction, if the above redirection works, will I be able to see the same Request attribute in OrderSearchAction? the same scenarion where I'm not able to get the value of request attribute which I set in my previous Action class then I set as session attribute and Im able to get that value in the other Action class where Im redirecting to. 2) A general question: if formA is linked to formB through a 'link'. If I click on the 'link' in formA, can I get to the passed parameter of FormA by doing Request.geParameter(id) or I can only retrieve 'id' throught a 'submit' rather than through a 'link'? I dont really understand your point but I assumed that you are passing a parameter from one form to another in such case if you are calling other page/calling action class by passing request parameter you could get those parameters on the other page/action class. hth -Ramadoss -Original Message- From: Au-Yeung, Stella H [mailto:[EMAIL PROTECTED] Sent: Monday, March 01, 2004 5:51 PM To: '[EMAIL PROTECTED]' Subject: Action not forwarding to another Action Hi: I have a similar problem that I can't invoke OrderSearchAction.exe from OrderMaintainAction. I set a debug breakpoint at the beginning of OrderSearchAction and never get there. actionpath=/app/DeleteOrder type=com.cat.action.OrderMaintainAction name=OrderFormBean scope=request validate=false forward name=Content path=/app/ListOfOrder.exe redirect=true / forward name=ContentError path=/app/DeleteError.jsp/ /action actionpath=/app/ListOfOrder type=com.cat.action.OrderSearchAction name=OrderSearchFormBean scope=request validate=false forward name=Content path=/app/ListOfOrder.jsp/ forward name=ContentError path=/app/OrderError.jsp/ /action I have two other questions: 1) Can someone also tell me if I have a Request attribute defined in OrderMaintainAction, if the above redirection works, will I be able to see the same Request attribute in OrderSearchAction? 2) A general question: if formA is linked to formB through a 'link'. If I click on the 'link' in formA, can I get to the passed parameter of FormA by doing Request.geParameter(id) or I can only retrieve 'id' throught a 'submit' rather than through a 'link'? Thanks for any help! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Search - Find what youre looking for faster http://search.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: A question on Struts taglib.
You can use the indexId attribute of logic:iterate tag... http://jakarta.apache.org/struts/doc-1.0.2/struts-logic.html#iterate HTH, Shyam --- Au-Yeung, Stella H [EMAIL PROTECTED] wrote: A question on Struts taglib. Can someone tell me how to reference the index of each element so I can pass it as a parameter with the a href path string? For example I have the following code, I want to print out 'partNumber' and 'partDescription' and a a href' with index of each element'. logic:iterate id=parts collection=%=ShopWorkOrderFormBean.getShopWorkOrder().getPartList()% type=com.cat.sdl.fdd.dataBean.shopWorkOrder.PartBean/td tr td class=formCellbean:write name=parts property=partNumber/nbsp;/td td class=formCellbean:write name=parts property='partDescription' /nbsp;/td td class=formCell a href=app/fdd/shopWorkOrder/UpdatePart.exec?index=How to reference the index here img src=images/iconEdit.gif/anbsp; /td/tr /logic:iterate Thanks in advance! Stella - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Mail SpamGuard - Read only the mail you want. http://antispam.yahoo.com/tools - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Must have action=..... in html:form tag?
Just a suggestion. Not sure if I'm right...
Instead of using onSubmit() event of your html:form,
why don't you call the Javascript when the user
clicks/submits the associcated HTML component -
Create/Update button, and set the action
accordingly.
HTH,
Shyam
--- Au-Yeung, Stella H [EMAIL PROTECTED]
wrote:
But I don't always want
/app/fdd/shopWorkOrder/fromCreateShopWorkOrder to
be my action all the time. I want the action for
the form to be dynamic
and depends on the form field whichAction. That's
why I created the
javascript function submitForm(frm) to pick the
action dynamically. In
other words, I have action mapping in my
struts-config.xml file for both
path
/app/fdd/shopWorkOrder/fromCreateShopWorkOrder and
/app/fdd/shopWorkOrder/fromUpdateShopWorkOrder.
But I want whichever one
to be chosen to be dynamically. So how I do that
all within the
html:form tag?
-Original Message-
From: Hubert Rabago [mailto:[EMAIL PROTECTED]
Sent: Monday, February 23, 2004 4:58 PM
To: Struts Users Mailing List
Subject: RE: Must have action=. in html:form
tag?
I never said anything close to what you're asking
me.
All I said is choose one of your two possible
outcomes (doesn't matter which
one), take the path that you gave it in the
struts-config.xml, then use that
in your html:form.
Let's say you have the ff entry in your
struts-config:
action path=/fromCreateShopWorkOrder ...
name=theForm
forward .../
/action
then in your html:form, specify that action:
html:form action=/fromCreateShopWorkOrder
method=post
onSubmit=return
submitForm(document.theForm)
...
/html:form
You do have action's associated with
fromCreateShopWorkOrder and
fromUpdateShopWorkOrder, right?
- Hubert
--- Au-Yeung, Stella H [EMAIL PROTECTED]
wrote:
Hubert:
Can you elaborate that In othe words, how do I
do everything that
the function submitForm() does to dynamically pick
an action all
within the html:form tag?
-Original Message-
From: Hubert Rabago [mailto:[EMAIL PROTECTED]
Sent: Monday, February 23, 2004 4:36 PM
To: Struts Users Mailing List
Subject: Re: Must have action=. in
html:form tag?
Specify the Action associated with
fromCreateShopWorkOrder or
fromUpdateShopWorkOrder in the html:form
attribute.
--- Au-Yeung, Stella H [EMAIL PROTECTED]
wrote:
Hi:
My html:form tag doesn't allow me to skip an
'action' attribue. If
you
look at my code below, I move the assignment of
the 'form action'
to
the javascript function so which action to take
is dynamically depends
on the form element 'whichAction'. But the
compiler insist I have to
have the 'action' property right inside the
html:form tag. But that
doesn't allow
me to choose the action dynamically. Does
anyone have any suggestion?
script language = Javascript
function submitForm(frm)
{
var whichAction=frm.elements(whichAction)
if (whichAction == create)
{
document.theForm.action =
/app/fdd/shopWorkOrder/fromCreateShopWorkOrder;
}
else
{
document.theForm.action =
/app/fdd/shopWorkOrder/fromUpdateShopWorkOrder;
}
return true;
}
/script
jsp:useBean id=ShopWorkOrderBean
scope=request
class=com.cat.sdl.fdd.formBean.shopWorkOrder.ShopWorkOrderForm/
html:form name=theForm method=post
onSubmit=return
submitForm(document.theForm)
I got the following error with the above code:
Parsing of JSP File
'/app/fdd/shopWorkOrder/CreateTLFPart.jsp'
failed:
/app/fdd/shopWorkOrder/CreateTLFPart.jsp(28):
required attribute
'action'
not specified for tag 'form'
probably occurred due to an error in
/app/fdd/shopWorkOrder/CreateTLFPart.jsp line
28:
html:form name=theForm method=post
onSubmit=return
submitForm(document.theForm)
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RE: Must have action=..... in html:form tag?
Well, as the others said DispatchAction is the way to go. Since, you already have two separate Actions defined, I thought it may be worthwhile to give my idea a try. What I meant was, instead of a submit button html:submit, use a normal button input type=button. You can display a create or update button based on the previous screen, i.e. logic:equal name=formName property=whichAction value =create input type=button name=Create onClick=submitForm /logic:equal logic:equal name=formName property=whichAction value =update input type=button name=Update onClick=submitForm /logic:equal Then, in your submitForm() Javascript, check for which button is clicked, or check for whichAction as you're doin now, and set the action accordingly. (Sorry, I'm not an expert in Javascript!) HTH, Shyam --- Au-Yeung, Stella H [EMAIL PROTECTED] wrote: Shyam: I am not sure what you mean, can you elaborate that? The current form only has one 'submit' button. After the user fills in data on the current form, I want the data to be submitted to the DB and then automatically be taken back to the 'previous' screen. This previous screen can be a 'Create main screen' or an 'Update main screen'. I use a hidden field 'whichAction' to remember which is the 'previous' screen. So when the user submits the input data on the cuurrent form, that's when the javascript submitForm() function decides which screen (/app/fdd/shopWorkOrder/fromCreateShopWorkOrder or /app/fdd/shopWorkOrder/fromUpdateShopWorkOrder) to return to. Example: Create Main screen use 'theForm' to input data return back to Create main Update Main screen - use 'theForm' to input data return back to Update main (this screen 'theForm' is where I decide which precious screen to return to based on the hidden field whichAction. That's why form action has to be dynamic My user only wants ONE submit button on theForm and the application should be smart enough to return to the correct 'previous' page. -Original Message- From: Shyam A [mailto:[EMAIL PROTECTED] Sent: Monday, February 23, 2004 5:31 PM To: Struts Users Mailing List Subject: RE: Must have action=. in html:form tag? Just a suggestion. Not sure if I'm right... Instead of using onSubmit() event of your html:form, why don't you call the Javascript when the user clicks/submits the associcated HTML component - Create/Update button, and set the action accordingly. HTH, Shyam __ Do you Yahoo!? Yahoo! Mail SpamGuard - Read only the mail you want. http://antispam.yahoo.com/tools - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: preview form
Maybe you can use a read-only text field to display the selected value of the drop-down on your preview page. You can get the label of the drop down in your action class for Preview , and then set the form bean property for the same. Also, use logic:equal on your JSP to check for the user action, and display drop-down or text field accordingly. HTH, Shyam P.S. Wonder if the 'newbie' has come of age?;) --- Janice [EMAIL PROTECTED] wrote: Hi Gang, I have a form that the client would like to be 'previewed' before users can submit. The plan is to have a form with a button that takes the user to the exact same form, but with all the form elements set to readonly. From there the user can go back to the editable form or can submit. At least that's the plan. I'm open to other suggestions, especially of the 'best practices' variety. I would have liked to display the form information on a non-form looking page, but the problem I have is the drop-downs which have a very different value from label. I don't want the preview to display something like: person: 12353 instead of person: Jane Doe So I guess I need the drop-downs, unless you all have a workaround? My immediate problem is that html:select / doesn't support readonly... what else can I do? TIA, JJ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online. http://taxes.yahoo.com/filing.html - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
problem with indexed properties
Hello,
I'm trying to use indexed propeties in my form bean
(ActionForm) to handle an array of text fields
generated dynamically. Initially, I used a String[] to
hold the text field values, and had a problem when
validation errors occured in my validate() method,
i.e, the values of the text fields were not retained.
To work around that, I'm trying indexed properties,
but it has not helped my cause, only added to my
woes:(
With indexed properties, I don't seem to get the
values of the textfields in the form bean(I get a
NullPointerException on form submission). Also, the
values in the textfields are not retained on
validation errors.
When my JSP is displayed initially, I seem to get some
null/junk entries in the text fields.
I used the sample code from
http://marc.theaimsgroup.com/?l=struts-userm=104815589928698w=2
for my form bean.
So, in my ActionForm, I have
#
private List candList = new ArrayList(); //previoulsy
was String[]
public List getCandList()
{
return candList;
}
public void setCandList(List aCandList)
{
candList = aCandList;
}
public String getCandList(int index)
{
while(index = candList.size()){
candList.add(new String());
}
return (String) candList.get(index);
}
public void setCandList(int index,String aCand)
{
candList.set(index,aCand);
}
-
I do not set candList=null in the reset() method.
In my Action class (DispatchAction), I have two
methods - get() and submit() corresponding to get
and submit requests on my JSP. In the get() method,
I tried populating the candList in my form bean with
dummy values, corresponding to the number of text
fields(obtained from database).
In my JSP, I use
html:text property=candList size=25
maxlength=25 indexed=true/
within a logic:iterate tag for a collection (of
business entities).
-
I guess there may be something wrong with the
getters/setters in my ActionForm, as my form bean
doesn't seem to get the user entered values in the
text fields.
Am I missing something in the reset() method?
Could somebody tell me what I'm doing wrong.
I'm not sure if the candList in my form bean should be
populated with dummy values in the get() method of my
Action class.
I tried in vain to find some good examples of form
beans with indexed properties..most of the examples
are for DynaActionForm, and I'm really strutting in
the dark:(
Any help/pointers will be greatly appreciated.
Thanks,
Shyam
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Re: Array of text fields generated dynamically - struggling with indexed properties
Hello,
I'm trying to use indexed propeties in my form bean
(ActionForm) to handle an array of text fields
generated dynamically. Initially, I used a String[] to
hold the text field values, and had a problem when
validation errors occured in my validate() method,
i.e, the values of the text fields were not retained.
To work around that, I'm trying indexed properties,
but it has not helped my cause, only added to my
woes:(
With indexed properties, I don't seem to get the
values of the textfields in the form bean(I get a
NullPointerException on form submission). Also, the
values in the textfields are not retained on
validation errors.
When my JSP is displayed initially, I seem to get some
null/junk entries in the text fields.
I used the sample code from
http://marc.theaimsgroup.com/?l=struts-userm=104815589928698w=2
for my form bean.
So, in my ActionForm, I have
#
private List candList = new ArrayList(); //previoulsy
was String[]
public List getCandList()
{
return candList;
}
public void setCandList(List aCandList)
{
candList = aCandList;
}
public String getCandList(int index)
{
while(index = candList.size()){
candList.add(new String());
}
return (String) candList.get(index);
}
public void setCandList(int index,String aCand)
{
candList.set(index,aCand);
}
-
I do not set candList=null in the reset() method.
In my Action class (DispatchAction), I have two
methods - get() and submit() corresponding to get
and submit requests on my JSP. In the get() method,
I tried populating the candList in my form bean with
dummy values, corresponding to the number of text
fields(obtained from database).
In my JSP, I use
html:text property=candList size=25
maxlength=25 indexed=true/
within a logic:iterate tag for a collection (of
business entities).
-
I guess there may be something wrong with the
getters/setters in my ActionForm, as my form bean
doesn't seem to get the user entered values in the
text fields.
Am I missing something in the reset() method?
Could somebody tell me what I'm doing wrong.
I'm not sure if the candList in my form bean should be
populated with dummy values in the get() method of my
Action class.
I tried in vain to find some good examples of form
beans with indexed properties..most of the examples
are for DynaActionForm, and I'm really strutting in
the dark:(
Any help/pointers will be greatly appreciated.
Thanks,
Shyam
--- Hubert Rabago [EMAIL PROTECTED] wrote:
I don't have the code with me right now, but I
learned to solve this with the
sample code from:
http://www.developer.com/java/other/article.php/2233591
On your html:text, you need to use the name and
property attributes, and
set indexed=true.
This is an excerpt from the article.
c:forEach var=lines
items=${purchaseOrderBeanForm.map.lines}
TRTDhtml:text indexed=true name=lines
property=partNumber//TD
TDhtml:text indexed=true name=lines
property=quantity//TD
TDhtml:text indexed=true name=lines
property=price//TD/TR
/c:forEach
You can also look at the nested tags and the
tutorials from
keyboardmonkey.com.
--- Shyam A [EMAIL PROTECTED] wrote:
Hubert,
Thanks again for your mail. I have not tried using
mapped properties, instead I stuck to my original
idea
of using an array of text fields/hidden fields
with
corresponding String[] in my form bean.
I have a problem with validating the array of text
fields,i.e., if there is a validation error, the
values entered in the text fields are not
retained.
Given below is the message I posted to
'struts-user'.
Do you think using indexed properties will help
solve
my problem? If yes, could you send a sample?
Hope it is not a bother.
Thanks,
Shyam
Hi,
I use a String[] in my form bean to handle a
dynamic
array of text fields.
In my ActionForm, I have
private String[] candList;
public String[] getCandList()
{
return candList;
}
public void setCandList(String[] aCandList)
{
candList = aCandList;
}
In my JSP, I use
html:text property=candList size=25
maxlength=25/
within a logic:iterate tag.
My problem is that when a validation error occurs
in
the validate() method of my form bean, the text
fields
are populated with junk values. The text fields do
not
retain the user entered values. However, the user
entered values can be printed out in the
validate()
method.
How do I work around this problem?
Any help, suggestions/pointers will be greatly
appreciated.
Thanks,
Shyam
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Re: Array of text fields generated dynamically - validation problem
Hi,
I use a String[] in my form bean to handle a dynamic
array of text fields.
In my ActionForm, I have
private String[] candList;
public String[] getCandList()
{
return candList;
}
public void setCandList(String[] aCandList)
{
candList = aCandList;
}
In my JSP, I use
html:text property=candList size=25
maxlength=25/
within a logic:iterate tag.
My problem is that when a validation error occurs in
the validate() method of my form bean, the text fields
are populated with junk values. The text fields do not
retain the user entered values. However, the user
entered values can be printed out in the validate()
method.
How do I work around this problem?
Any help, suggestions/pointers will be greatly
appreciated.
Thanks,
Shyam
--- Shyam A [EMAIL PROTECTED] wrote:
Hi,
I have a scenario in my Struts application, where I
have an array of text fields grouped by category on
a
JSP, and these are generated dynamically.
eg.
Category A
text field 1
text field 2
text field 3
Category B
text field 1
text field 2
The issue here is how to handle the values of the
text
fields in my form bean. What I plan to do is to have
a
String array for the text fields, and also a
corresponding array of hidden fields, to identify
the
category.
Is this the best way to handle this situation?
Any help/suggustions/pointers will be greatly
appreciated.
Thanks,
Shyam
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Unable to redirect to error page in declarative Exception handling
Hi, I use declarative Exception handling for my Struts application in 2 places - struts-config.xml and web.xml. I use the following in my Struts-config.xml: ## global-exceptions exception key=error.exception type=java.lang.Exception handler=dsap.application.action.DsapExceptionHandler path=/error.jsp/ /global-exceptions ### In my Exception Handler class, I use - return new ActionForward(ae.getPath()) to redirect to the error page. Also,I have an error page defined in my web.xml as follows: error-page exception-typejava.lang.Exception/exception-type location/error.jsp/location /error-page The error page, error.jsp is directly under the application directory like the other JSPs. However, my application is not redirected to the error page - error.jsp, when there is an Exception like NullPointerException. Could somebody tell me what I'm doing wrong. Any help would be greatly appreciated. Thanks, Shyam __ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Configuring Struts applications on OC4J (Oracle 9i AS)
Hi, I'm working on Struts applications that are deployed on OC4J (Oracle 9i AS 1.0.2.2). I have deployed my applications under the directory OC4J/home/applications directory and access those using the default OC4J listener on port . i.e, http://hostname:/appName/index.jsp. Now, I need to modify my URL to include another directory called test/prod. eg: http://hostname:/test/appName/index.jsp I have tried modifying the OC4J configuration files in the OC4J/home/config directory to match the new directory structure but it doesn't seem to work. Does anybody have any experience working with OC4J? Any help/pointers will be greatly appreciated. Thanks, Shyam __ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[OT] Mailing large number of recipients
Hi, I have a Struts application in which I need to send email notification to a large number of recipients based on a user action. Currently, I use the Java Mail API and send emails from my application. I use a single email with all recipients in the BCC field. Although, this approach works reasonably well for small numbers (around 100), it doesn't seem suitable for mailing very large number of recipients (in the order of 1000's). I'm not sure if the mailing process can be done at the backend with Oracle 9i database, using a stored procedure or a trigger. Any ideas/suggestions/pointers will be greatly appreciated. Thanks, Shyam __ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] Mailing large number of recipients
Kirk, Thanks a lot for your suggestions. I will look into JMS. In my current approach, the process of sending the mail is time consuming.I'm concerned that sending an email to 1000's of recipients from my application (using JMS, Thread etc) would clog my application server (OC4J) and slow down its operation, which is why I was wondering if it could be done at the backend-Oracle 9i. Thanks, Shyam --- Kirk Wylie [EMAIL PROTECTED] wrote: Shyam A wrote: Hi, I have a Struts application in which I need to send email notification to a large number of recipients based on a user action. Currently, I use the Java Mail API and send emails from my application. I use a single email with all recipients in the BCC field. Although, this approach works reasonably well for small numbers (around 100), it doesn't seem suitable for mailing very large number of recipients (in the order of 1000's). I'm not sure if the mailing process can be done at the backend with Oracle 9i database, using a stored procedure or a trigger. What specifically is taking a long time? Is it the generation of the email, or its sending? Because most email servers should make sending such a message quite quick as they're doing the actual caching and sending to multiple recipients. But in general, you might look into JMS for this type of thing (i.e. some way to background process an operation), since it's the standard J2EE way to do asynchronous event management like this. An alternative which is a little messier, but is probably quicker to do, is to have a thread-based operation which you kick off in your Action class immediately before returning from execute(...). It would then create and send the email. In this case you would return control to the user (who's the one who caused the mass email to kick off) immediately, and background-process the emails. The major problems here are: 1) There are better ways to do this (i.e. JMS and/or message driven beans) 2) You're potentially creating a large number of threads if this is happening on a regular basis. But if it is, that's even more reason to use JMS or a commercial bulk emailing system (where bulk != spam) 3) You can't provide immediate feedback to the user about the status of the mail job because it's happening in the background. 4) Because it's not transactional (unlike JMS), you might lose the email if there's a failure. Kirk Wylie M7 Corporation - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] Mailing large number of recipients
Kirk, Brice and Elio, Thanks a lot for pointing me in the right direction. I really appreciate it! Shyam --- Kirk Wylie [EMAIL PROTECTED] wrote: Shyam A wrote: Kirk, Thanks a lot for your suggestions. I will look into JMS. In my current approach, the process of sending the mail is time consuming.I'm concerned that sending an email to 1000's of recipients from my application (using JMS, Thread etc) would clog my application server (OC4J) and slow down its operation, which is why I was wondering if it could be done at the backend-Oracle 9i. No doubt, there's a way to do it using PL/SQL or some type of server-side Java in O9i, but then we're getting so far OT that I wouldn't have the first idea on how you would do that. But using something like JMS would actually allow much better scalability on your application as a whole: 1) The DB is usually the most overloaded part of a major application, and your DBAs will probably be MOST unhappy if they find out you're sending bulk email on your database server. 2) If you start overloading the database server, the whole application will slow down anyway, as well as any other applications running on the database server. Not such a great idea. 3) The application server tier is much more naturally horizontally scalable, meaning it's easier to setup a horizontal cluster of idential application server nodes (either in a true cluster or just as a load-balanced farm). 4) If you really have this one problem (which is that this one task is really computational), JMS is the way to go, because you can setup a separate application server instance with ONLY that queue processing ocurring on it and thus offload all the work from the rest of the system. #4 is the kicker with the JMS approach. In essence you're creating a mail server (har har) which only does this one task. But I think that Brice has the right idea here: it sounds like what you really need is a better email server. There's no excuse for a mail server that isn't horribly overburdened or remote taking a long time to respond to a large batch email like this. If yours is (perhaps because you're using your corporate email server as a bulk SMTP gateway), ask your IT staff if you can setup a postfix (my favorite for this stuff) or sendmail system on a cheap Linux box to do SMTP gateway for you, because they'll handle this without even a murmur. Kirk Wylie M7 Corporation - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: request.setAttribute
Why you are putting it into the request yaar?? U can put it into the session.. Regards, Shyam Honza Spurný [EMAIL PROTECTED] 11/28/03 05:10 PM Please respond to Struts Users Mailing List [EMAIL PROTECTED] To [EMAIL PROTECTED] cc Subject request.setAttribute Hi there, I have small problem with adding some objects to the request. I need to store quite huge object into request variable MyObject o = new MyObject(); o.setObjectName(name); request.setAttribute(myObejct, o); These are correct steps how to make it, aren't they? But the object MyObject is really huge. Is it possible, tak the huge objects are not store into request variable? Because when I store there object that surely exists, and then I call MyObject o2 = (MyObject)request.getAttribute(o); if (o2 == null) System.out.println(NULL); else System.out.println(o.getObjectName()); I always get NULL on output. Can be there problem with the size of such object? Thanks Sporak - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Lazy questions on this list
Well, a list meant exclusively for newbies doesn't serve the purpose as we will miss the expert advice and words of wisdom of the experienced Struts gurus on this list!! Shyam, (eternally newbie!) --- Linda Coleman [EMAIL PROTECTED] wrote: Would it be possible to create a newbie list? As a newbie I would much rather read post messages on a list targeted to people just starting out. A lazy question to experienced developer could be a valid newbie question... L:) Paul McCulloch wrote: Is it my imagination or are the number of downright lazy requests to this list getting worse? If the only replies any lazy questions ever got was http://www.catb.org/~esr/faqs/smart-questions.html then maybe people would get the point. Has anyone got any other ideas about how we can reduce the amount of lazy and totally off-topic posts to the list? Paul ** Axios Email Confidentiality Footer Privileged/Confidential Information may be contained in this message. If you are not the addressee indicated in this message (or responsible for delivery of the message to such person), you may not copy or deliver this message to anyone. In such case, you should destroy this message, and notify us immediately. If you or your employer does not consent to Internet email messages of this kind, please advise us immediately. Opinions, conclusions and other information expressed in this message are not given or endorsed by my Company or employer unless otherwise indicated by an authorised representative independent of this message. WARNING: While Axios Systems Ltd takes steps to prevent computer viruses from being transmitted via electronic mail attachments we cannot guarantee that attachments do not contain computer virus code. You are therefore strongly advised to undertake anti virus checks prior to accessing the attachment to this electronic mail. Axios Systems Ltd grants no warranties regarding performance use or quality of any attachment and undertakes no liability for loss or damage howsoever caused. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Lazy questions on this list
Well, a newbie like me is happy as long as I know I'm not fishing in troubled waters:) --- Larry Meadors [EMAIL PROTECTED] wrote: I agree. At the same time I do not think that How do I deprecate a method? or What is JSTL? kinds of questions should be answered with anything more involved than a link or reference to google. Remember the parable about giving a man a fish vs. teaching him how to fish? As long as these questions are answered, they will continue to be asked. Larry [EMAIL PROTECTED] 11/20/03 10:03 AM Well, a list meant exclusively for newbies doesn't serve the purpose as we will miss the expert advice and words of wisdom of the experienced Struts gurus on this list!! Shyam, (eternally newbie!) --- Linda Coleman [EMAIL PROTECTED] wrote: Would it be possible to create a newbie list? As a newbie I would much rather read post messages on a list targeted to people just starting out. A lazy question to experienced developer could be a valid newbie question... L:) Paul McCulloch wrote: Is it my imagination or are the number of downright lazy requests to this list getting worse? If the only replies any lazy questions ever got was http://www.catb.org/~esr/faqs/smart-questions.html then maybe people would get the point. Has anyone got any other ideas about how we can reduce the amount of lazy and totally off-topic posts to the list? Paul ** Axios Email Confidentiality Footer Privileged/Confidential Information may be contained in this message. If you are not the addressee indicated in this message (or responsible for delivery of the message to such person), you may not copy or deliver this message to anyone. In such case, you should destroy this message, and notify us immediately. If you or your employer does not consent to Internet email messages of this kind, please advise us immediately. Opinions, conclusions and other information expressed in this message are not given or endorsed by my Company or employer unless otherwise indicated by an authorised representative independent of this message. WARNING: While Axios Systems Ltd takes steps to prevent computer viruses from being transmitted via electronic mail attachments we cannot guarantee that attachments do not contain computer virus code. You are therefore strongly advised to undertake anti virus checks prior to accessing the attachment to this electronic mail. Axios Systems Ltd grants no warranties regarding performance use or quality of any attachment and undertakes no liability for loss or damage howsoever caused. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Array of html:checkbox / html:multibox not retaining state after validation
Hi, I have a scenario where I have an array of checkboxes along with other data displayed in a table format on a JSP. I have to keep track of which checkbox is checked or unchecked when a user submits the form. I use the validate() method of my ActionForm to do validation. However, the values of the checkboxes are not retained when a validation error occurs. I have tried the following in vain: a. Array of html:checkbox I have used a boolean array for the form data type corresponding to the checkbox. Also, I set all the values of the boolean array to false in the reset() method. b. Array of html:multibox In this case, I have a String array for the form data type, and the array is not populated initially. The value of the html:multibox is obtained from a bean stored in the session, i.e html:multibox property=formProperty value=%=someValue% /html:multibox which is inside a logic:iterate loop. Also, in the reset method of the form, I set the value of the String array to null (this has worked for me in the past). I'm not sure how to set the array length to 0. Unfortunately, both of the above approaches don't help in retaining the states of the checkboxes when a validation error occurs. I also tried using Javascript to populate a hidden variable with the values of the checkboxes on form submission, and setting the checkbox array with the hidden variable array when a validation error occurs. This didn't work either. Could somebody tell me what I'm doing wrong? Any help/pointers will be greatly appreciated. Thanks, Shyam __ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [OT] Handling database connection exceptions
Wendy, Thanks for your mail. I don't know if you fully understood where I'm coming from! As I said, the database connection is accessed from a Data Access class (read model), which is called from my DispatchAction class. Since the exception is not caught in my DispatchAction class (the methods throw Exception), it is propagated to my JSP's. It doesn't mean my JSP's directly access the database! Anyway, thanks for your help. Shyam --- Wendy Smoak [EMAIL PROTECTED] wrote: I have a Database servlet configured in web.xml, which intialises a connection pool on Server startup. However, if the data source is unavailable, I get a Null Pointer exception on my JSPs, which is propagated from my Data Access class. IMO, the problem is that you're accessing the database from the JSP. And this, in a Struts webapp?! The view has no business talking to the model. If you move the data access to the Action, then you can catch the error and gracefully forward to an error page. Meanwhile, you can define error pages in web.xml so that your users don't see the stack trace. For example, I have this: error-page exception-typejavax.servlet.ServletException/exception-type location/WEB-INF/jsp/exceptionServlet.jsp/location /error-page which gives the user an apology and a phone number to call. -- Wendy Smoak Applications Systems Analyst, Sr. Arizona State University, PA, IRM - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [OT] Handling database connection exceptions
Richard, Thanks for your mail. I am pretty sure I don't access the database in my JSP's. I also use the errorPage attribute for all my JSP's, however, it does not handle Null Pointer exceptions that occur due to problems with database connection. Given below is the Exception trace...it occurs when I try to logon to my application when my database is down. Btw, I use an Action class for processing user login. (I use DispatchAction class for all other operations) ## 500 Internal Server Error java.lang.NullPointerException at obs.business.UserLogin.checkLogin(UserLogin.java:192) at obs.application.LoginController.checkLogin(LoginController.java:37) at obs.application.action.LoginAction.perform(LoginAction.java:91) at org.apache.struts.action.Action.execute(Action.java:415) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:465) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1422) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:523) at javax.servlet.http.HttpServlet.service(HttpServlet.java:211) at javax.servlet.http.HttpServlet.service(HttpServlet.java:309) at javax.servlet.http.HttpServlet.service(HttpServlet.java:336) at com.evermind[Oracle9iAS (1.0.2.2) Containers for J2EE].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:501) at com.evermind[Oracle9iAS (1.0.2.2) Containers for J2EE].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:170) at com.evermind[Oracle9iAS (1.0.2.2) Containers for J2EE].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:576) at com.evermind[Oracle9iAS (1.0.2.2) Containers for J2EE].server.http.HttpRequestHandler.run(HttpRequestHandler.java:189) at com.evermind[Oracle9iAS (1.0.2.2) Containers for J2EE].util.ThreadPoolThread.run(ThreadPoolThread.java:62) ### As you would notice above, the Exception is propagated from a class in the model - UserLogin. I noticed that the UserLogin class catches only SQLException, which is why I guess the NullPointer exception is propagated to my Action class. Again, the perform() method of the Action class throws Exception but does not catch it. What do you think would be a graceful solution to this problem? Pardon my ignorance! Thanks, Shyam --- Yee, Richard K,,DMDCWEST [EMAIL PROTECTED] wrote: Shyam, Where in your JSP does the NullPointerException occur? Is it in a method call in a scriptlet? If so, your JSP is still indirectly accessing the database. What Wendy suggested was that the the database access class be invoked from your DisplactAction class and the results be put in a collection and set as an attribute in the request. That way, any problems with getting the data would be caught in your Action class and then you could forward to an error page. Otherwise, why can't you just specify an error page using the errorPage attribute in your JSP's [EMAIL PROTECTED] ... tag? -Richard -Original Message- From: Shyam A [mailto:[EMAIL PROTECTED] Sent: Monday, November 17, 2003 3:10 PM To: Struts Users Mailing List Cc: [EMAIL PROTECTED] Subject: RE: [OT] Handling database connection exceptions Wendy, Thanks for your mail. I don't know if you fully understood where I'm coming from! As I said, the database connection is accessed from a Data Access class (read model), which is called from my DispatchAction class. Since the exception is not caught in my DispatchAction class (the methods throw Exception), it is propagated to my JSP's. It doesn't mean my JSP's directly access the database! Anyway, thanks for your help. Shyam --- Wendy Smoak [EMAIL PROTECTED] wrote: I have a Database servlet configured in web.xml, which intialises a connection pool on Server startup. However, if the data source is unavailable, I get a Null Pointer exception on my JSPs, which is propagated from my Data Access class. IMO, the problem is that you're accessing the database from the JSP. And this, in a Struts webapp?! The view has no business talking to the model. If you move the data access to the Action, then you can catch the error and gracefully forward to an error page. Meanwhile, you can define error pages in web.xml so that your users don't see the stack trace. For example, I have this: error-page exception-typejavax.servlet.ServletException/exception-type location/WEB-INF/jsp/exceptionServlet.jsp/location /error-page which gives the user an apology and a phone number to call. -- Wendy Smoak Applications Systems Analyst, Sr. Arizona State University, PA, IRM
RE: [OT] Handling database connection exceptions
Richard, I use Struts 1.1.Thanks for your help...I finally found what I was looking for. Shyam --- Yee, Richard K,,DMDCWEST [EMAIL PROTECTED] wrote: Shyam, Are you using Struts 1.0 or 1.1? It seems that you are using Struts 1.0. If not, then you can combine my suggestion with what Vic suggested and define an exception handler for your DatabaseUnavailableException instead of catching it in the perform() method. This would enable all of your pages to handle this the condition where your data access layer can't connect to a database. http://jakarta.apache.org/struts/userGuide/building_controller.html#exceptio n_handler -Richard -Original Message- From: Yee, Richard K,,DMDCWEST [mailto:[EMAIL PROTECTED] Sent: Monday, November 17, 2003 4:07 PM To: 'Struts Users Mailing List' Subject: [OT] Handling database connection exceptions Shyam, This problem is not happing in your JSP. According to your stack trace, it happens in obs.business.UserLogin.checkLogin(UserLogin.java:192) which is being called in your LoginAction.perform(). I think you should translate the NullPointerException generated in your checkLogin method to a more meaningful exception (ie. DatabaseUnavailableException) and catch it in your perform() method. You can then redirect to an error page from there. -Richard 500 Internal Server Error java.lang.NullPointerException at obs.business.UserLogin.checkLogin(UserLogin.java:192) -Original Message- From: Shyam A [mailto:[EMAIL PROTECTED] Sent: Monday, November 17, 2003 3:53 PM To: Struts Users Mailing List Cc: [EMAIL PROTECTED] Subject: RE: [OT] Handling database connection exceptions Richard, Thanks for your mail. I am pretty sure I don't access the database in my JSP's. I also use the errorPage attribute for all my JSP's, however, it does not handle Null Pointer exceptions that occur due to problems with database connection. Given below is the Exception trace...it occurs when I try to logon to my application when my database is down. Btw, I use an Action class for processing user login. (I use DispatchAction class for all other operations) ## 500 Internal Server Error java.lang.NullPointerException at obs.business.UserLogin.checkLogin(UserLogin.java:192) at obs.application.LoginController.checkLogin(LoginController.java:37) at obs.application.action.LoginAction.perform(LoginAction.java:91) at org.apache.struts.action.Action.execute(Action.java:415) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProces sor.java:465) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1422) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:523) at javax.servlet.http.HttpServlet.service(HttpServlet.java:211) at javax.servlet.http.HttpServlet.service(HttpServlet.java:309) at javax.servlet.http.HttpServlet.service(HttpServlet.java:336) at com.evermind[Oracle9iAS (1.0.2.2) Containers for J2EE].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.j ava:501) at com.evermind[Oracle9iAS (1.0.2.2) Containers for J2EE].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDis patcher.java:170) at com.evermind[Oracle9iAS (1.0.2.2) Containers for J2EE].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java: 576) at com.evermind[Oracle9iAS (1.0.2.2) Containers for J2EE].server.http.HttpRequestHandler.run(HttpRequestHandler.java:189) at com.evermind[Oracle9iAS (1.0.2.2) Containers for J2EE].util.ThreadPoolThread.run(ThreadPoolThread.java:62) ### As you would notice above, the Exception is propagated from a class in the model - UserLogin. I noticed that the UserLogin class catches only SQLException, which is why I guess the NullPointer exception is propagated to my Action class. Again, the perform() method of the Action class throws Exception but does not catch it. What do you think would be a graceful solution to this problem? Pardon my ignorance! Thanks, Shyam --- Yee, Richard K,,DMDCWEST [EMAIL PROTECTED] wrote: Shyam, Where in your JSP does the NullPointerException occur? Is it in a method call in a scriptlet? If so, your JSP is still indirectly accessing the database. What Wendy suggested was that the the database access class be invoked from your DisplactAction class and the results be put in a collection and set as an attribute in the request. That way, any problems with getting the data would be caught in your Action class and then you could forward to an error page. Otherwise, why can't you just specify an error page using the errorPage attribute
simple question
Hi, Is there any Struts tag for an expression like %= request.getAttribute(attributeName)% where the attribute is a String. Thanks, Shyam __ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
indexId attribute of logic:iterate tag
Hi, I have a JSP page in which I display the results of a database query in a table format using logic:iterate tag for a bean. I want to display the number of the table row using the indexId attribute of the logic:iterate tag. The index starts from 0 but I want to display the records starting from 1. I have been unsuccessful at my initial attempts in manipulating the indexId to work the way I want. Any suggestions? Thanks, Shym __ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Passing parameters between forms
Carey, Thanks for your mail. I knew about the option you suggested and mentioned it in my mail. quote: I know I can save the foo attribute into session in Action A class and access it in Action B, or set the scope of Form A to session in struts-config and access Form A from Action B. unquote: However, the disadvantage of this option is that I need to use session scope for the forms, which I would like to avoid. I also know it is possible to pass the form attribute as a request parameter as follows: html:link page=Action B?parameter=value But, this allows the user to see the parameters being passed. I would rather use buttons for the link and post the form. Do you have any suggestions/comments? Thanks, Shyam --- Carey Nation [EMAIL PROTECTED] wrote: I have some vague memory (perhaps completely wrong) that the forms are stored wherever they are stored using the names that you specify in struts-config. It may not be the nicest way to do this, but I'm pretty sure that, given session scope on your forms, you can do something like (FormA)forma = session.getAttribute(FormA); HTH, Carey - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Passing parameters between forms
Hi, I have a scenario where I need to pass parameters between forms.i.e, I have two forms, Form A and Form B with the same attribute foo. The value of foo is set in Form A. Also, I have a link from the JSP page corresponding to Form A to the action corresponding to Form B,i.e, In form A, I have html:form action=/Action A html:text property=foo/ ... html:link forward=Action B bean:message key=key/ /html:link /html:form I'm unable to access the foo property in Action B class using String foo = ((Form B) form).getFoo() as foo is not in scope. I know I can save the foo attribute into session in Action A class and access it in Action B, or set the scope of Form A to session in struts-config and access Form A from Action B. Is there a better way to do this? Any help/suggestions would be greatly appreciated. Thanks, Shyam __ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Forwarding to URL from DispatchAction class - any takers?
Hi, I have tried in vain to find a solution to my issue and didn't find anything useful in the mailing list archives. So, I'm posting it again. Could somebody help? Here goes I have an application that is accessed from another application and I need to return a user to the original application when the user logs out/times out of my application. I always get a HTTP - Bad Request error when I try to forward to a URL from my DispatchAction class. I have tried defining the URL path as a global forward in my struts-config: forward name=login path=http://...; /, and used the following code in the Action class methods: return (servlet.findForward(login)); Also, I get the same result if I define the URL as a constant and use the code below: return (new ActionForward(Constants.URL)); The reason I guess is that the ActionForward object uses a relative path and inserts a / at the beginning of the URL. I have also tried in vain using response.sendRedirect(URL). response.sendRedirect() does not redirect the user to the URL, instead control goes to the next statement in my DispatchAction class method. I'm not sure if this is an Application Server issue... I use OC4J, the application server that comes with Oracle9iAS (1.0.2.2). Is there any solution to this problem? Any help would be greatly appreciated. Thanks, Shyam __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [newbie]: forwarding to a URL from Action class - 2nd post
Hello, Thanks for your mail. I have defined the path for the URL in the global forwards : forward name=login path=http://xxx.edu:8025/pls/TEST/twbkwbis.P_WWWLogin/ As I mentioned, the ActionForward object adds a / to the path and the browser returns a HTTP - Bad Request error message. Is there a way to solve this problem?? Thanks, Shaym --- Sachin [EMAIL PROTECTED] wrote: Actually your forwards should be part of your mapping object but you are trying to pass forward with matching of it in struts-config.xml.. So it oyu should define it in global forwards so that mapping will get That URL... Thanks Sachin -Original Message- From: Shyam A [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 06, 2003 9:49 PM To: [EMAIL PROTECTED] Subject: [newbie]: forwarding to a URL from Action class Hi, I have an application that is accessed from another application and I need to return a user to the original application when the user logs out/times out of my application. I always get a HTTP - Bad Request error when I try to forward to a URL from my DispatchAction class. I have tried defining the URL in my struts-config and used the following code in the Action class methods: return (servlet.findForward(login)); Also, I get the same result if I define the URL as a constant and use the code below: return (new ActionForward(Constants.URL)); The reason I guess is that the ActionForward object uses a relative path and inserts a / at the beginning of the URL. Any help would be greatly appreciated. Thanks, Shyam __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[newbie]: forwarding to a URL from Action class
Hi, I have an application that is accessed from another application and I need to return a user to the original application when the user logs out/times out of my application. I always get a HTTP - Bad Request error when I try to forward to a URL from my DispatchAction class. I have tried defining the URL in my struts-config and used the following code in the Action class methods: return (servlet.findForward(login)); Also, I get the same result if I define the URL as a constant and use the code below: return (new ActionForward(Constants.URL)); The reason I guess is that the ActionForward object uses a relative path and inserts a / at the beginning of the URL. Any help would be greatly appreciated. Thanks, Shyam __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[newbie]: forwarding to a URL from Action class - any takers?
Hi, I have an application that is accessed from another application and I need to return a user to the original application when the user logs out/times out of my application. I always get a HTTP - Bad Request error when I try to forward to a URL from my DispatchAction class. I have tried defining the URL path as a global forward in my struts-config: forward name=login path=http://...; /, and used the following code in the Action class methods: return (servlet.findForward(login)); Also, I get the same result if I define the URL as a constant and use the code below: return (new ActionForward(Constants.URL)); The reason I guess is that the ActionForward object uses a relative path and inserts a / at the beginning of the URL. I have also tried in vain using response.sendRedirect(URL). response.sendRedirect() does not redirect the user to the URL, instead control goes to the next statement in my DispatchAction class method. I'm not sure if this is an Application Server issue... I use OC4J, the application server that comes with Oracle9iAS (1.0.2.2). Is there any solution to this problem? Any help would be greatly appreciated. Thanks, Shyam __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[newbie]: Accessing labelProperty in html:options
Hi, I'm using the html:options tag to populate a drop-down list from a collection. My code is as follows: html:select property=termCode onchange=submitForm(this.form) html:options collection=termList property=value labelProperty=label/ /html:select The property termCode is a string in my ActionForm class. I would like to access the selected value in the drop-down, i.e, labelProperty in my ActionClass. I'm not sure how it is done. Any help would be greatly appreciated. Thanks, Shyam __ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [newbie]: Accessing labelProperty in html:options
Amit, Sorry, I overlooked your code and missed something. I need to access both the termCode (property) and name(labelProperty) in my action class. Is there a way to do it? Thanks, Shyam --- Amit Kirdatt [EMAIL PROTECTED] wrote: To access the selected value in your action class ((MyCodeForm)anActionForm).getTermCode() --Amit -Original Message- From: Amit Kirdatt Sent: Monday, July 21, 2003 5:17 PM To: 'Struts Users Mailing List' Subject: RE: [newbie]: Accessing labelProperty in html:options Do the following: html:select property=termCode onchange=submitForm(this.form) html:options collection=termList property=label labelProperty=label/ /html:select -Original Message- From: Shyam A [mailto:[EMAIL PROTECTED] Sent: Monday, July 21, 2003 3:04 PM To: [EMAIL PROTECTED] Subject: [newbie]: Accessing labelProperty in html:options Hi, I'm using the html:options tag to populate a drop-down list from a collection. My code is as follows: html:select property=termCode onchange=submitForm(this.form) html:options collection=termList property=value labelProperty=label/ /html:select The property termCode is a string in my ActionForm class. I would like to access the selected value in the drop-down, i.e, labelProperty in my ActionClass. I'm not sure how it is done. Any help would be greatly appreciated. Thanks, Shyam __ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including attachments, may include confidential and/or proprietary information, and may be used only by the person or entity to which it is addressed. If the reader of this e-mail is not the intended recipient or his or her authorized agent, the reader is hereby notified that any dissemination, distribution or copying of this e-mail is prohibited. If you have received this e-mail in error, please notify the sender by replying to this message and delete this e-mail immediately. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including attachments, may include confidential and/or proprietary information, and may be used only by the person or entity to which it is addressed. If the reader of this e-mail is not the intended recipient or his or her authorized agent, the reader is hereby notified that any dissemination, distribution or copying of this e-mail is prohibited. If you have received this e-mail in error, please notify the sender by replying to this message and delete this e-mail immediately. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: newbie question - setting form parameter in Javascript
Mark,
Thanks a lot for your mails. I have used action as a form bean property and not as a
parameter in struts-config. Unfortunately, the Javascript function doesn't seem to
work...it does not set the value of the ActionForm property, action.
When I tried to print out the value of the action property in my ActionClass,
I got a null value.
I tried the following code in my Action class and I got a null value.
String action = ((ActionForm) form).getAction();
Wonder if I have missed something.
Shyam
Mark Lowe [EMAIL PROTECTED] wrote:
Its better that this is posted to the list as well, after all its a
good question and hopefully an adequate answer.
function lookup(form) {
form.elements['action'].value = lookup;
form.submit();
}
//--
...
[input]
//struts config
name=myForm redirect=false parameter=action /
The only thing you'd have to watch would be if the client didn't
support javascript then you'd lose lookup, this would make a case for
having action as a form bean property and have some relevantly named
form elements in noscript tags. If lookup isn't mission critical then i
guess you could let this slide.
On Friday, July 11, 2003, at 08:44 PM, Shyam A wrote:
Mark,
Thanks for your mail. I understand that DispatchAction class includes
multiple execute methods for different actions. However, I still have
some doubts.
You mentioned using tags in JSP:
Are these used instead of using Submit buttons ?
i.e use and in conjunction instead
of ? Can
be used for a drop- down?
I guess my problem is still unresolved. As I mentioned in my earlier
mail, I have a drop-down associated with an ActionForm property crn
.
None
I would like to trigger an action called Lookup when the drop-down
is clicked .i.e, associate the clicking of the drop-down with the
action property of the ActionForm class. I don't know how to set the
action property of the ActionForm class when the drop-down is
selected, based on which appropriate method of the DispatchAction
class would be executed.
Any help would be greatly appreciated.
Thanks,
Shyam
Mark Lowe wrote:
check out dispatch actions..
you can have multiple execute methods with dispatch action ...
Your Action class extends DispatchAction instead of action (check the
docs)
public final ActionForward submit(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
...
}
public final ActionForward lookup(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
...
}
in struts config the parameter attibute need to know the name of the
parameter your about to send, the value of which is your execute method
name..
scope=request parameter=action
...
and then in jsp
HTH Mark
On Friday, July 11, 2003, at 08:00 PM, Shyam A wrote:
James,
Thanks for your mail. I guess I need to elaborate a little bit. My
HTML form can be submitted in 2ways.
1. Clicking the Submit button.
2. Clicking the drop-down
Clicking the drop-down triggers a different action than clicking the
Submit button.
Selecting a value in the drop-down would submit the form and populate
some of the other fields in the form. This is done before the
Submit
button is clicked. So, I need to distinguish the action of clicking
the drop-down from clicking the Submit button and I called it
Lookup.
Both actions would be identified with a single property in the
ActionForm class - action.
eg:
I would like to set this action property value to Lookup on
clicking the drop-down using Javascript. I guess a hidden field would
not serve the purpose as I already have action property defined for
the Submit button.
Look forward to your help/suggestions.
Thanks,
Shyam
James Mitchell wrote:
You will need to create a hidden field named action, with a value
of
Lookup:
My question to you iswhy Lookup? What does that have to do with
your
form?
Here's a sample:
function submitForm(form) {
form.action.value=Lookup;
form.submit();
return true;
}
[input]
Test Test2
On Friday 11 July 2003 14:15, Shyam A wrote:
Hi,
I have an HTML form with Submit and Cancel buttons, and a drop down
list,
which when clicked submits the form. I use Javascript to submit the
form
when the dropdown list is clicked. I have a property called action
defined in my ActionForm class that identifies the Submit and Cancel
buttons in the HTML form. When the drop-down is clicked, I would
like
to
set the value of this action property to Lookup.
My Javascript function is given below:
function submitForm(form)
{
form.action.value=Lookup;
form.submit();
return true;
}
#
and I
newbie question - setting form parameter in Javascript
Hi,
I have an HTML form with Submit and Cancel buttons, and a drop down list, which when
clicked submits the form. I use Javascript to submit the form when the dropdown list
is clicked.
I have a property called action defined in my ActionForm class that identifies the
Submit and Cancel buttons in the HTML form. When the drop-down is clicked, I would
like to set the value of this action property to Lookup.
My Javascript function is given below:
SCRIPT language=JavaScript
function submitForm(form)
{
form.action.value=Lookup;
form.submit();
return true;
}
#
and I invoke this function in my HTML form as shown below:
#
html:select property=crn onclick=submitForm(this.form)
html:option value=Test selectedTest/html:option
/html:select
###
But, the value of the property action is not set to Lookup.
Any help would be greatly appreciated.
Thanks,
Shyam
-
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Re: newbie question - setting form parameter in Javascript
James,
Thanks for your mail. I guess I need to elaborate a little bit. My HTML form can be
submitted in 2ways.
1. Clicking the Submit button.
2. Clicking the drop-down
Clicking the drop-down triggers a different action than clicking the Submit button.
Selecting a value in the drop-down would submit the form and populate some of the
other fields in the form. This is done before the Submit button is clicked. So, I
need to distinguish the action of clicking the drop-down from clicking the Submit
button and I called it Lookup.
Both actions would be identified with a single property in the ActionForm class -
action.
eg:
html:submit property=action value=Submit/
I would like to set this action property value to Lookup on clicking the drop-down
using Javascript. I guess a hidden field would not serve the purpose as I already have
action property defined for the Submit button.
Look forward to your help/suggestions.
Thanks,
Shyam
James Mitchell [EMAIL PROTECTED] wrote:
You will need to create a hidden field named action, with a value of
Lookup:
My question to you iswhy Lookup? What does that have to do with your
form?
Here's a sample:
function submitForm(form) {
form.action.value=Lookup;
form.submit();
return true;
}
[input]
Test Test2
On Friday 11 July 2003 14:15, Shyam A wrote:
Hi,
I have an HTML form with Submit and Cancel buttons, and a drop down list,
which when clicked submits the form. I use Javascript to submit the form
when the dropdown list is clicked. I have a property called action
defined in my ActionForm class that identifies the Submit and Cancel
buttons in the HTML form. When the drop-down is clicked, I would like to
set the value of this action property to Lookup.
My Javascript function is given below:
function submitForm(form)
{
form.action.value=Lookup;
form.submit();
return true;
}
#
and I invoke this function in my HTML form as shown below:
#
Test
###
But, the value of the property action is not set to Lookup.
Any help would be greatly appreciated.
Thanks,
Shyam
-
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--
James Mitchell
Software Developer/Struts Evangelist
http://www.struts-atlanta.org
678-910-8017
AIM:jmitchtx
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[newbie]: Remving Form Bean from scope
Hi,
I'm not sure about the purpose of removing a form bean
from scope in an ActionClass after submitting a form,
as shown below:
##
// Remove the obsolete form bean
if (mapping.getAttribute() != null) {
if (request.equals(mapping.getScope()))
request.removeAttribute(mapping.getAttribute());
else
session.removeAttribute(mapping.getAttribute());
#
What will happen if the form bean is not removed from
scope? Does it affect concurrent access of the
corresponding web page in anyway?
Could somebody throw some light on the topic?
Thanks,
Shyam
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