OR mapping (1/* relationship between 2 entity beans)
Hello everyone,
I have an OR mapping that involves 2 entity beans, named Group and User,
like in the following example:
public class GroupBean implements EntityBean
{
...
List users;
public addUser(User user)
{
users.add(user);
}
}
So, I have an 1/* relationship.
What I want to know is what modifications do I have to made to
orion-ejb-jar.xml to reflect this OR mapping? On the orionsupport site,
there are 2 example for advanced OR mapping, one involving a relationship
between 2 entity bean, but in an one/one relationship (one entity bean has
as an attribute other entity bean, not a list of them), and one involving a
relationship between an entity bean and a regular JavaBean (not an entity
bean). I tried to combine those two to solve my situation, but it didn't
worked out.
If you are kind enough to give me an example, I will greatly appreciated.
Thanks for listening,
George.
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Re: Design strategy
Hello Daniel,
What I said about those 2 tables, was strictly Orion-related. You are right,
in designing relational databases, a n-m relationship will be normalized by
introducing 1 (one) table and two 1-n relationships between the existing 2
tables (Group, User) and the new one (let's say GroupUser). Thus, we will
avoid redundancy.
In Orion, as far as I know, if I use something like this:
public class GroupBean
{
...
List users;
...
}
public class UserBean...
{
...
List groups;
}
to simulate a *-* relationship, Orion will create, by OR mapping, a table
for my first 1-* relationship Group-User (let's say the table is named
Group_users) and another table for my other 1-* relationship User-Group
(let's say the table is named Users_group). Of course, these 2 tables
(Group_users and Users_group) are identical, but I think Orion will not know
that these two 1-n relationships represent in fact one n-m relationship.
Please be advised that his is only my supposition about Orion. I don't know
if I'm right about this one but I'll be glad if someone can clarify this
issue for me. I was trying to find out for some days, how Orion handles *-*
relationships, but I wasn't lucky to find something useful.
best regards,
George.
- Original Message -
From: Daniel Lopez [EMAIL PROTECTED]
To: Orion-Interest [EMAIL PROTECTED]
Sent: Tuesday, October 02, 2001 5:04 PM
Subject: Re: Design strategy
Hi George,
I don't know about EJB, as we don't use them, but having an extra table to
represent an n-m relationship is a well stablished technique when
designing
relational databases. AFAIK there's no other way to do that while
providing
db-enforced consistency and avoiding redundancy. You represent a logical
n-m
relationship, you create a new table that implements two real 1-n
relationships,
thus creating one extra table. I don't see where you get two extra tables
per
relationship from.
regards,
D.
George Mardale wrote:
Hello Owen,
Thank you for your kind response. Yesterday, while waiting for a
response on
the Orion mailing list, we thought of a design somehow close to yours.
We
thought that using 3 different tables (ClassRoles, GroupRoles,
UserRoles)
was a good ideea.
But today, we came up with a solution that we thought would benefit of
Orion's powerful features. Thanks to Alex Paransky who helped us a lot,
we
tried to redesign the system, using OR mapping. So, we designed
something
like this:
public class GroupBean implements EntityBean
{
...
List users; //1..* relationship with UserBean
}
public class UserBean implements EntityBean
{
List groups; //1..* relationship with GroupBean
}
Practically, we broke every *..* relationship (in this case Group(*) -
User(*)) into two 1..* relationships. And so on, for every relationship
that
we have:
Class(1) - Group(*)
User(*) - Role(*)
Group(*) - Role(*)
Class(*) - Role(*)
As far as I know, Orion will create an additional table in the database
that
will store the relationship. For example, for users attribute in
GroupBean,
it will create a new table Group_users, besides the existing Group and
User
tables. Practically, for every *-* relationship will have 2 more tables
in
the database. Is that correct?
What I want to know is if this design is correct. Are there any
drawbacks
that would make this system work unproperly (may be some OR mapping
problems)?
Tkanks,
George.
- Original Message -
From: Owen Fellows [EMAIL PROTECTED]
To: Orion-Interest [EMAIL PROTECTED]
Sent: Tuesday, October 02, 2001 10:58 AM
Subject: RE: Design strategy
Hello,
We have done a similar thing were we don't know the type of class
assign
the
role except at runtime.
The solution we used was to have an Object Type table (contain Class,
Group,
User).
Then created a interface which was Roleable (i.e. this class can have
a
role
assigned).
In the database you can store each assignment in a different table
(ClassRoles, GroupRoles, UserRoles),
or have a generic table that stores Roleable_id, Role_id and
Object_type_id.
This does have drawbacks e.g. the Database does not have enforced
consistence as the Roleable_id is not a foreign key on any one table.
It
may also be slower to retrieve the Roles for a particular (Class,
Group,
User) as you will have to lookup it object type and then its roles.
(You
could always cache object types as there will not be that many).
I'm sure you can implement a Bean with the above functionality (we
haven't
used beans for this so I can help there).
Hope this is of some help.
Owen
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of George
Mardale
Sent: 02 October 2001 06:06
To: Orion-Interest
Subject: RE: Design strategy
Hello Alex,
Thank you for your
RE: Design strategy
I would think that is this better done with LDAP and defined roles and groups. Then use the J2EE security linked to the LDAP to control access. Remember that Entity beans represent data in the database. Unless each of these things are actual data then it should not be an entity bean. Jonathan Bricker Lilly Research Labs Java ATG Alex Paransky [EMAIL PROTECTED] Sent by: [EMAIL PROTECTED] 10/02/01 05:06 PM Please respond to Orion-Interest To:Orion-Interest [EMAIL PROTECTED] cc: Subject:RE: Design strategy 1) It seemed to me that a class was merely a container of N groups. From your example, it seems that group (chemistry professor) was just a sub-group of a group called (Professor). In other words: Professor | +-- Chemistry Professor I was not aware of other fields in the Class, and this was the reason for the suggestion. Since you can still attach roles to the groups, from the example above Chemistry Professor could inherit the roles from the Professor Group 2) You can use standard many/many relationships for this. I have had limited success with this. -AP_ -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of George Mardale Sent: Monday, October 01, 2001 10:06 PM To: Orion-Interest Subject: RE: Design strategy Hello Alex, Thank you for your prompt response. Your suggestions are excellent. You're right, the analysis is not correct. I tried to reduce the problem to a simple example. To avoid complexity, I just limited the relationships to 1..*. Maybe the example is not the best, but I only wanted to know if I could model the Abstract being bean in Orion. There are still 2 issues we are unclear about: 1. what are the advantages of dumping entity Class? (Class has specific fields that Group does not have) 2. could you please detail the best way to implement a *-* relationship in Orion? Thanks, George.
javax.naming
Title: javax.naming javax.naming what happened to this in the 1.3 release?? what did it get replaced by Joseph Faisal Nusairat, Sr. Project Manager WorldCom tel: 614-723-4232 pager: 888-452-0399 textmsg: [EMAIL PROTECTED]
New Release????
My original post never appeared, so I am reposting... -Steve ---BeginMessage--- Greetings. A new release was recently announced, but I have been unable to find it on the website. The only thing I have been able to find any references to is the 1.5.2 build, which has been around for a while. If somebody could provide a link, it would be greatly appreciated. Thanks, Steve -- Stephen Davidson Java Consultant Delphi Consultants, LLC http://www.delphis.com Phone: 214-696-6224 x208 ---End Message---
RE: OR mapping (1/* relationship between 2 entity beans)
Orion is pretty good as far as keeping the relationships in
orion-ejb-jar.xml current. We have not been using BMP, but mostly 2.0 style
CMP, and this particular area has been working for us without a flaw.
-AP_
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of George Mardale
Sent: Wednesday, October 03, 2001 2:18 AM
To: Orion-Interest
Subject: OR mapping (1/* relationship between 2 entity beans)
Hello everyone,
I have an OR mapping that involves 2 entity beans, named Group and User,
like in the following example:
public class GroupBean implements EntityBean
{
...
List users;
public addUser(User user)
{
users.add(user);
}
}
So, I have an 1/* relationship.
What I want to know is what modifications do I have to made to
orion-ejb-jar.xml to reflect this OR mapping? On the orionsupport site,
there are 2 example for advanced OR mapping, one involving a relationship
between 2 entity bean, but in an one/one relationship (one entity bean has
as an attribute other entity bean, not a list of them), and one involving a
relationship between an entity bean and a regular JavaBean (not an entity
bean). I tried to combine those two to solve my situation, but it didn't
worked out.
If you are kind enough to give me an example, I will greatly appreciated.
Thanks for listening,
George.
RE: Design strategy
Yes, I have noticed the same behavior in 2.0 CMP style beans. What I have
been doing is simply alerting orion-ejb-jar.xml, and changing one of the
tables into another one. So, instead of 2 tables, there is actually 1
table. I am not sure, if this is working correctly during transaction, in
other words, I think orion still keeps two separate relationships in memory
until a commit is done. So GroupBean.add(user), will not find group in
the user entity until a commit and update to the relational table. This
is somewhat frustrating and I am hoping will get fixed with the next release
of Orion (not clear when that will happen since we have not seen any updates
for over 9 months now!).
-AP_
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of George Mardale
Sent: Wednesday, October 03, 2001 5:49 AM
To: Orion-Interest
Subject: Re: Design strategy
Hello Daniel,
What I said about those 2 tables, was strictly Orion-related. You are right,
in designing relational databases, a n-m relationship will be normalized by
introducing 1 (one) table and two 1-n relationships between the existing 2
tables (Group, User) and the new one (let's say GroupUser). Thus, we will
avoid redundancy.
In Orion, as far as I know, if I use something like this:
public class GroupBean
{
...
List users;
...
}
public class UserBean...
{
...
List groups;
}
to simulate a *-* relationship, Orion will create, by OR mapping, a table
for my first 1-* relationship Group-User (let's say the table is named
Group_users) and another table for my other 1-* relationship User-Group
(let's say the table is named Users_group). Of course, these 2 tables
(Group_users and Users_group) are identical, but I think Orion will not know
that these two 1-n relationships represent in fact one n-m relationship.
Please be advised that his is only my supposition about Orion. I don't know
if I'm right about this one but I'll be glad if someone can clarify this
issue for me. I was trying to find out for some days, how Orion handles *-*
relationships, but I wasn't lucky to find something useful.
best regards,
George.
- Original Message -
From: Daniel Lopez [EMAIL PROTECTED]
To: Orion-Interest [EMAIL PROTECTED]
Sent: Tuesday, October 02, 2001 5:04 PM
Subject: Re: Design strategy
Hi George,
I don't know about EJB, as we don't use them, but having an extra table to
represent an n-m relationship is a well stablished technique when
designing
relational databases. AFAIK there's no other way to do that while
providing
db-enforced consistency and avoiding redundancy. You represent a logical
n-m
relationship, you create a new table that implements two real 1-n
relationships,
thus creating one extra table. I don't see where you get two extra tables
per
relationship from.
regards,
D.
George Mardale wrote:
Hello Owen,
Thank you for your kind response. Yesterday, while waiting for a
response on
the Orion mailing list, we thought of a design somehow close to yours.
We
thought that using 3 different tables (ClassRoles, GroupRoles,
UserRoles)
was a good ideea.
But today, we came up with a solution that we thought would benefit of
Orion's powerful features. Thanks to Alex Paransky who helped us a lot,
we
tried to redesign the system, using OR mapping. So, we designed
something
like this:
public class GroupBean implements EntityBean
{
...
List users; //1..* relationship with UserBean
}
public class UserBean implements EntityBean
{
List groups; //1..* relationship with GroupBean
}
Practically, we broke every *..* relationship (in this case Group(*) -
User(*)) into two 1..* relationships. And so on, for every relationship
that
we have:
Class(1) - Group(*)
User(*) - Role(*)
Group(*) - Role(*)
Class(*) - Role(*)
As far as I know, Orion will create an additional table in the database
that
will store the relationship. For example, for users attribute in
GroupBean,
it will create a new table Group_users, besides the existing Group and
User
tables. Practically, for every *-* relationship will have 2 more tables
in
the database. Is that correct?
What I want to know is if this design is correct. Are there any
drawbacks
that would make this system work unproperly (may be some OR mapping
problems)?
Tkanks,
George.
- Original Message -
From: Owen Fellows [EMAIL PROTECTED]
To: Orion-Interest [EMAIL PROTECTED]
Sent: Tuesday, October 02, 2001 10:58 AM
Subject: RE: Design strategy
Hello,
We have done a similar thing were we don't know the type of class
assign
the
role except at runtime.
The solution we used was to have an Object Type table (contain Class,
Group,
User).
Then created a interface which was Roleable (i.e. this class can have
a
role
assigned).
In the database you can store each assignment in a different table
Re: New Release????
The release was only announced as coming within the next few days - which is certainly not specific. They've had to re-write a bit of the core parts for spec purposes so there is certainly testing they need to do before it gets out to us... Hopefully - within the next few days! Cheers Ray --- Stephen Davidson [EMAIL PROTECTED] wrote: My original post never appeared, so I am reposting... -Steve ATTACHMENT part 2 message/rfc822 Date: Tue, 02 Oct 2001 17:07:45 -0500 From: Stephen Davidson [EMAIL PROTECTED] Organization: Delphi Consultants, LLC To: Orion-Interest [EMAIL PROTECTED] Subject: New Release Greetings. A new release was recently announced, but I have been unable to find it on the website. The only thing I have been able to find any references to is the 1.5.2 build, which has been around for a while. If somebody could provide a link, it would be greatly appreciated. Thanks, Steve -- Stephen Davidson Java Consultant Delphi Consultants, LLC http://www.delphis.com Phone: 214-696-6224 x208 __ Do You Yahoo!? Listen to your Yahoo! Mail messages from any phone. http://phone.yahoo.com
RE: New Release????
no new release... always check out http://www.orionserver.com/orion/changes.txt also, you can download orion.jar from http://www.orionserver.com/orion/orion.jar (that's what autoupdate does, BTW) No new release or further comments from magnus yet. -Original Message- From: Stephen Davidson [mailto:[EMAIL PROTECTED]] Sent: Miércoles, 03 de Octubre de 2001 10:22 To: Orion-Interest Subject: New Release My original post never appeared, so I am reposting... -Steve
Protocol violation w/ Oracle
Does any noe know why i would get this error servlet to session bean to oracle db i do get a connection then when i try to create a preparedStatement this happens thanks chad java.sql.SQLException: Protocol violation at oracle.jdbc.dbaccess.DBError.check_error(DBError.java:631) at oracle.jdbc.ttc7.O3log.receive2nd(O3log.java, Compiled Code) at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:214) at oracle.jdbc.driver.OracleConnection.init(OracleConnection.java:142) at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.ja va:214) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:193) at com.evermind.sql.DriverManagerDataSource.getConnection(Unknown Source ) at com.evermind.sql.DriverManagerConnectionPoolDataSource.getPooledConne ction(Unknown Source) at com.evermind.sql.OrionPooledDataSource._bgb(Unknown Source) at com.evermind._jb._bgb(Unknown Source) at com.evermind.sql.OrionPooledDataSource.getConnection(Unknown Source) at com.evermind.sql.DriverManagerXADataSource._bvc(Unknown Source) at com.evermind._vn._bl(Unknown Source) at com.evermind._lo.createStatement(Unknown Source) at com.evermind._lo.createStatement(Unknown Source) at com.dumc.servlet.AddContact.doPost(AddContact.java, Compiled Code) 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._cxb._abe(Unknown Source) at com.evermind._cxb._uec(Unknown Source) at com.evermind._io._twc(Unknown Source) at com.evermind._io._gc(Unknown Source) at com.evermind._if.run(Unknown Source) OrionCMTConnection not closed, check your code! LogicalDriverManagerXAConnection not closed, check your code! Created at: java.lang.Throwable: OrionCMTConnection created at com.evermind._wp.init(Unknown Source) at com.evermind.sql.OrionCMTDataSource.getConnection(Unknown Source) at com.dumc.servlet.AddContact.doPost(AddContact.java, Compiled Code) 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._cxb._abe(Unknown Source) at com.evermind._cxb._uec(Unknown Source) at com.evermind._io._twc(Unknown Source) at com.evermind._io._gc(Unknown Source) at com.evermind._if.run(Unknown Source) __ Do You Yahoo!? Listen to your Yahoo! Mail messages from any phone. http://phone.yahoo.com
Displaying errors in JSP
If I have a code block such as
%
try {
}
catch (Exception e) {
}
%
inside a JSP, how do I output error to either the browser or
to the server console ?
--
Vinay Vaze
M/S : 7H-80
Phone : (425)-865-2929
Email : [EMAIL PROTECTED]
Can't get client app to work
I am trying to get to work the examples from Ed Roman's book Mastering
Enerprise Java Beans.
One of his examples is CountBean client application.
Here is what I have done so far.
I have Orion installed in
D:\Program Files\SPSSWeb\Orion
J2EE sdk installed in
C:\j2sdkee1.2.1
Java SDK installed in
C:\jdk1.3
I created classes CountBean, CountHome, Count in a package session.count and
located them
in c:\orionapp\classes\session\count. In the same directory I also have
CountClient class.
I compiled allclasses from C:\orionapp\classes.
Using Sun's deploytool I crated the Mastering.ear file containing
ejb-jar-ic.jar
app-client-ic.jar
META-INF\MANIFEST.MF
META-INF\applicatioin.xml
META-INF\sun-j2ee-ri.xml
I deployed the application into Orion and got the following confirmation:
Auto-deploying mastering (Assembly had been updated)...
Auto-deploying ejb-jar-ic.jar (ejb-jar.xml had been touched since the
previous d
eployment)... done.
Auto-deploying app-client-ic.jar (Previous deployment not found)... done.
I extracted the files contained int the app-client-ic.jar into
c:\orionapp\classes.
Now I am trying to run the client application like this and get the
following error:
C:\orionapp\classesjava -classpath
c:\orionapp\classes\;C:\orionapp\orionlib\or
ion.jar session.count.CountClient
javax.naming.NameNotFoundException: Count_JNDIName not found
at com.evermind.server.rmi.RMIContext.lookup(Unknown Source)
at com.evermind._dkb.lookup(Unknown Source)
at javax.naming.InitialContext.lookup(InitialContext.java:350)
at session.count.CountClient.main(CountClient.java:15)
The code in CountClient.java that tries to look up the CountHome object
looks like this:
package session.count;
import javax.ejb.*;
import javax.naming.*;
import java.util.Properties;
public class CountClient
{
public static void main(String [] args)
{
try
{
Properties props = System.getProperties();
Context ctx = new InitialContext(props);
CountHome home = (CountHome) ctx.lookup(Count_JNDIName);
According to some postings in this mail list when the client application is
looking up
ejbs it shouldn't use the java:comp/env prefixed names.
Here is the contents of the various xml files (minus the headers). All of
these files were
created either by deploytool or by Orion's deployment process.
c:\orionapp\classes\META-INF\application-client.xml
-
application-client
display-nameCountClient/display-name
descriptionDescription entered via New Client Application
Wizard/description
env-entry
descriptionSome environment entry/description
env-entry-namexyz/env-entry-name
env-entry-typejava.lang.String/env-entry-type
env-entry-value6/env-entry-value
/env-entry
ejb-ref
descriptionmain EJB referenced in the code/description
ejb-ref-namesession.count.CountBean/ejb-ref-name
ejb-ref-typeSession/ejb-ref-type
homesession.count.CountHome/home
remotesession.count.Count/remote
/ejb-ref
/application-client
c:\orionapp\classes\META-INF\orion-application-client.xml
-
orion-application-client
ejb-ref-mapping name=session.count.CountBean location=Count /
/orion-application-client
c:\orionapp\classes\jndi.properties
-
#Orion JNDI properties
#Tue Oct 02 17:57:23 CDT 2001
java.naming.provider.url=ormi\://127.0.0.1\:23791/mastering
java.naming.factory.initial=com.evermind.server.ApplicationClientInitialCont
extFactory
java.naming.security.principal=admin
java.naming.security.credentials=123
c:\orionapp\classes\META-INF\sun-j2ee-ri.xml
-
j2ee-ri-specific-information
app-client
ejb-ref
ejb-ref-namesession.count.CountBean/ejb-ref-name
jndi-nameCount_JNDIName/jndi-name
/ejb-ref
/app-client
/j2ee-ri-specific-information
I have been trying to solve this problem for the last 2 days by looking on
Orion's site,
this site, javasoft site but I can't figure out what is wrong. It seems to
me that
JNDI doesn't have the right name or maybe the xml files don't contain the
right information.
Please help.
Thank you
Swavek
RE: javax.naming
Title: javax.naming Umm..it's in the rt.jar.. right where it has always has been... -Original Message-From: Nusairat, Joseph F. [mailto:[EMAIL PROTECTED]]Sent: Wednesday, October 03, 2001 8:49 AMTo: Orion-InterestSubject: javax.naming javax.naming what happened to this in the 1.3 release?? what did it get replaced by Joseph Faisal Nusairat, Sr. Project Manager WorldCom tel: 614-723-4232 pager: 888-452-0399 textmsg: [EMAIL PROTECTED]
RE: Displaying errors in JSP
for the terminal, you can use System.out.println(e.getMessage()) in the
catch phrase
for the jsp, you will need to initialize some string variable in the catch
block and then use in the html ...
%
String error = ;
try {
}
catch (Exception e){
error = e.getMessage();
}
%
...html stuff
p%=error%/p
But this isn't really always necessary. Orion will spit out the error in the
jsp if you don't catch it...since there is a try/catch built around every
jsp page. Try it...do something silly in the jsp page to create a Null
Pointer Error, and watch the fireworks in the browser. As long as you don't
have a 500 error page, your jsp Null Pointer Error will be in the browser.
regards,
the elephantwalker
www.elephantwalker.com
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of EXT-Vaze,
Vinay G
Sent: Wednesday, October 03, 2001 9:09 AM
To: Orion-Interest
Subject: Displaying errors in JSP
If I have a code block such as
%
try {
}
catch (Exception e) {
}
%
inside a JSP, how do I output error to either the browser or
to the server console ?
--
Vinay Vaze
M/S : 7H-80
Phone : (425)-865-2929
Email : [EMAIL PROTECTED]
Re: NullPointerException and DataSource
Perry did you fin out the answer to this i'm running into the same problem data-sources !-- An example/default DataSource that uses an ordinary JDBC-driver (in this case hsql) to create the connections. This tag creates all the needed kinds of data-sources, transactional, pooled and EJB-aware sources. The source generally used in application code is the EJB one - it provides transactional safety and connection pooling. -- data-source class=com.evermind.sql.DriverManagerDataSource name=Oracle schema=database-schemas/oracle.xml location=jdbc/OracleCoreDS xa-location=jdbc/xa/OracleXADS ejb-location=jdbc/OracleDS connection-driver=oracle.jdbc.driver.OracleDriver url=jdbc:oracle:thin:@localhost:1521:ORACLE8 username=scott password=tiger / /data-sources thanks chad java.sql.SQLException: Protocol violation at oracle.jdbc.dbaccess.DBError.check_error(DBError.java:631) at oracle.jdbc.ttc7.O3log.receive2nd(O3log.java, Compiled Code) at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:214) at oracle.jdbc.driver.OracleConnection.init(OracleConnection.java:142) at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.ja va:214) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:193) at java.sql.DriverManager.getConnection(DriverManager.java:457) at java.sql.DriverManager.getConnection(DriverManager.java:137) at com.dumc.servlet.AddContact.doPost(AddContact.java, Compiled Code) 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._cxb._abe(Unknown Source) at com.evermind._cxb._uec(Unknown Source) at com.evermind._io._twc(Unknown Source) at com.evermind._io._gc(Unknown Source) at com.evermind._if.run(Unknown Source) --- Perry Hoekstra [EMAIL PROTECTED] wrote: Greet the sun all: I am trying to execute a Oracle query using a data source an I am receiving the following NullPointerException: testCreateAuditLog(com.ingenix.hisit.subrotrack.test.audit.ejb.AuditLogTest)java.lang.NullPointerException at com.evermind.sql.OrionPooledDataSource._bsb(Unknown Source) at com.evermind.sql.OrionPooledDataSource._brb(Unknown Source) at com.evermind._wp._pud(Unknown Source) at com.evermind._wp._bl(Unknown Source) at com.evermind._lo.createStatement(Unknown Source) at com.ingenix.hisit.subrotrack.audit.dao.AuditEventDAOImpl.generateAuditEventId(Unknown Source) at com.ingenix.hisit.subrotrack.test.SubroTestUtils.getAuditRawData(Unknown Source) at com.ingenix.hisit.subrotrack.test.audit.ejb.AuditLogTest.beginCreateAuditLog(Unknown Source) at org.apache.cactus.AbstractTestCase.callBeginMethod(AbstractTestCase.java:203) at org.apache.cactus.AbstractTestCase.runGenericTest(AbstractTestCase.java:404) at org.apache.cactus.ServletTestCase.runTest(ServletTestCase.java:130) at org.apache.cactus.AbstractTestCase.runBare(AbstractTestCase.java:371) at com.ingenix.hisit.subrotrack.test.audit.ejb.AuditLogTest.main(Unknown Source) If I do a toString on the database connection, I see: [jdbc/OracleDS connection] I have tried both PreparedStatement and CreateStatement. What other things can I try in order to debug this problem? -- Perry Hoekstra E-Commerce Architect Talent Software Services [EMAIL PROTECTED] __ Do You Yahoo!? Listen to your Yahoo! Mail messages from any phone. http://phone.yahoo.com
RE: Displaying errors in JSP
BTW, if you use IE, disable 'friendly HTTP error messages'. This option, in
its active state will prevent the error page to display in the browser.
JP
-Original Message-
From: The elephantwalker [mailto:[EMAIL PROTECTED]]
Sent: Miércoles, 03 de Octubre de 2001 13:21
To: Orion-Interest
Subject: RE: Displaying errors in JSP
for the terminal, you can use
System.out.println(e.getMessage()) in the
catch phrase
for the jsp, you will need to initialize some string variable
in the catch
block and then use in the html ...
%
String error = ;
try {
}
catch (Exception e){
error = e.getMessage();
}
%
...html stuff
p%=error%/p
But this isn't really always necessary. Orion will spit out
the error in the
jsp if you don't catch it...since there is a try/catch built
around every
jsp page. Try it...do something silly in the jsp page to create a Null
Pointer Error, and watch the fireworks in the browser. As
long as you don't
have a 500 error page, your jsp Null Pointer Error will be in
the browser.
regards,
the elephantwalker
www.elephantwalker.com
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of EXT-Vaze,
Vinay G
Sent: Wednesday, October 03, 2001 9:09 AM
To: Orion-Interest
Subject: Displaying errors in JSP
If I have a code block such as
%
try {
}
catch (Exception e) {
}
%
inside a JSP, how do I output error to either the browser or
to the server console ?
--
Vinay Vaze
M/S : 7H-80
Phone : (425)-865-2929
Email : [EMAIL PROTECTED]
RE: Displaying errors in JSP
System.out.print() - server console
out.print() - HTML page
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of EXT-Vaze,
Vinay G
Sent: Wednesday, October 03, 2001 12:09
To: Orion-Interest
Subject: Displaying errors in JSP
If I have a code block such as
%
try {
}
catch (Exception e) {
}
%
inside a JSP, how do I output error to either the browser or
to the server console ?
--
Vinay Vaze
M/S : 7H-80
Phone : (425)-865-2929
Email : [EMAIL PROTECTED]
Re: Displaying errors in JSP
Response Inlined.
EXT-Vaze, Vinay G wrote:
If I have a code block such as
%
try {
}
catch (Exception e) {
e.printStackTrace(); //This should write the stack trace of the
exception to the console.
}
%
inside a JSP, how do I output error to either the browser or
to the server console ?
--
Vinay Vaze
M/S : 7H-80
Phone : (425)-865-2929
Email : [EMAIL PROTECTED]
--
Stephen Davidson
Java Consultant
Delphi Consultants, LLC
http://www.delphis.com
Phone: 214-696-6224 x208
Re: Can't get client app to work
Greetings, Swavek.
I think the problem may be your orion-ejb-jar.xml file. If you do not
have one (you did not post one), Orion will autogenerate one for you
based (loosely) on your ejb-jar.xml file. It is similar to the one for
the J2EE server, and the details are available on the Orion
Documentation web pages. The file that orion generates will, if left to
its own devices, give your ejbs JNDI names that end in EJB. In this
case, for you to access your EJB, you would most likely have to look for
CountEJB. Even if you do specify one, Orion will still create and use
its own, but will use yours as the template. What happens is that when
it generates the stub and skeleton files, these generated files are what
is actually stored as the home and remote interfaces in the xml file.
If it is reading yours, it will set the JNDI names as you specify. Use
your OrionConsole to examine what Orion thinks your Jar file looks like.
If you want to change the JNDI name of something that Orion has
autogenerated info for, you will have to make sure that all of the
temp files are deleted. There seem to be two sets, one in the
ORION_HOME/application-deployments directory, and one with the .ear file
(if you are using ear files).
Regards,
Steve
Lorenc, Swavek wrote:
I am trying to get to work the examples from Ed Roman's book Mastering
Enerprise Java Beans.
One of his examples is CountBean client application.
Here is what I have done so far.
I have Orion installed in
D:\Program Files\SPSSWeb\Orion
J2EE sdk installed in
C:\j2sdkee1.2.1
Java SDK installed in
C:\jdk1.3
I created classes CountBean, CountHome, Count in a package session.count and
located them
in c:\orionapp\classes\session\count. In the same directory I also have
CountClient class.
I compiled allclasses from C:\orionapp\classes.
Using Sun's deploytool I crated the Mastering.ear file containing
ejb-jar-ic.jar
app-client-ic.jar
META-INF\MANIFEST.MF
META-INF\applicatioin.xml
META-INF\sun-j2ee-ri.xml
I deployed the application into Orion and got the following confirmation:
Auto-deploying mastering (Assembly had been updated)...
Auto-deploying ejb-jar-ic.jar (ejb-jar.xml had been touched since the
previous d
eployment)... done.
Auto-deploying app-client-ic.jar (Previous deployment not found)... done.
I extracted the files contained int the app-client-ic.jar into
c:\orionapp\classes.
Now I am trying to run the client application like this and get the
following error:
C:\orionapp\classesjava -classpath
c:\orionapp\classes\;C:\orionapp\orionlib\or
ion.jar session.count.CountClient
javax.naming.NameNotFoundException: Count_JNDIName not found
at com.evermind.server.rmi.RMIContext.lookup(Unknown Source)
at com.evermind._dkb.lookup(Unknown Source)
at javax.naming.InitialContext.lookup(InitialContext.java:350)
at session.count.CountClient.main(CountClient.java:15)
The code in CountClient.java that tries to look up the CountHome object
looks like this:
package session.count;
import javax.ejb.*;
import javax.naming.*;
import java.util.Properties;
public class CountClient
{
public static void main(String [] args)
{
try
{
Properties props = System.getProperties();
Context ctx = new InitialContext(props);
CountHome home = (CountHome) ctx.lookup(Count_JNDIName);
According to some postings in this mail list when the client application is
looking up
ejbs it shouldn't use the java:comp/env prefixed names.
Here is the contents of the various xml files (minus the headers). All of
these files were
created either by deploytool or by Orion's deployment process.
c:\orionapp\classes\META-INF\application-client.xml
-
application-client
display-nameCountClient/display-name
descriptionDescription entered via New Client Application
Wizard/description
env-entry
descriptionSome environment entry/description
env-entry-namexyz/env-entry-name
env-entry-typejava.lang.String/env-entry-type
env-entry-value6/env-entry-value
/env-entry
ejb-ref
descriptionmain EJB referenced in the code/description
ejb-ref-namesession.count.CountBean/ejb-ref-name
ejb-ref-typeSession/ejb-ref-type
homesession.count.CountHome/home
remotesession.count.Count/remote
/ejb-ref
/application-client
c:\orionapp\classes\META-INF\orion-application-client.xml
-
orion-application-client
ejb-ref-mapping name=session.count.CountBean location=Count /
/orion-application-client
c:\orionapp\classes\jndi.properties
-
#Orion JNDI properties
#Tue Oct 02 17:57:23 CDT 2001
java.naming.provider.url=ormi\://127.0.0.1\:23791/mastering
I've screwed up a component DD???? NamingException: Cannot lookup java:comp/env attributes, not in a valid component
I've got two apps deployed as expaned directories. XML files are similar since they're similar apps. But one does not allow any context lookups and one does? orionconsole can't access the context and EJB's in the broken app but can in the other. It gets these naming exceptions in the orion console log. What could be off in my deployment descriptors ??? Thanks!! curt javax.naming.NamingException: Cannot lookup java:comp/env attributes, not in a valid component at com.evermind.server.Application.getEnvironmentContext(Application.java:1669) at com.evermind.server.ApplicationContext.lookup(ApplicationContext.java:104) at com.evermind.server.ApplicationContext.lookup(ApplicationContext.java:63) at javax.naming.InitialContext.lookup(InitialContext.java:350) at gov.ga.gdc.bm.security.dao.ValidateLoginManager.getDatasource(ValidateLoginManager.java:365) at gov.ga.gdc.bm.security.dao.ValidateLoginManager.getDBConnection(ValidateLoginManager.java:400) at gov.ga.gdc.bm.security.dao.ValidateLoginManager.checkPassword(ValidateLoginManager.java:227) at gov.ga.gdc.bm.security.dao.ValidateLoginManager$UserWrapper.authenticate(ValidateLoginManager.java:305) at com.evermind.server.rmi.RMIConnection.run(RMIConnection.java:346) at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:64)
RE: I've screwed up a component DD???? NamingException: Cannot lookup java:comp/env attributes, not in a valid component
What happened when you deployed? Did you get any error messages? It looks like your datasource jndi name is wrong in the offending appalmost like it isn't even deployed. Check out the name of your datasource in your resource tag. This is where it is blowing up. For example, if this is in a servlet, there should be a resource tag in the web.xml file. If this is in an ejb, then there is a resource tag in the ejb-jar.xml file. We need a little more to go on, though. You can go to www.elephantwalker.com, and post a request. After you post a request, you can actually attach files to your request... regards, the elephantwalker www.elephantwalker.com -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Curt SmithSent: Wednesday, October 03, 2001 1:21 PMTo: Orion-InterestSubject: I've screwed up a component DD NamingException: Cannot lookup java:comp/env attributes, not in a valid component I've got two apps deployed as expaned directories. XML files are similar since they're similar apps. But one does not allow any context lookups and one does? orionconsole can't access the context and EJB's in the broken app but can in the other. It gets these naming exceptions in the orion console log. What could be off in my deployment descriptors ??? Thanks!! curt javax.naming.NamingException: Cannot lookup java:comp/env attributes, not in a valid component at com.evermind.server.Application.getEnvironmentContext(Application.java:1669) at com.evermind.server.ApplicationContext.lookup(ApplicationContext.java:104) at com.evermind.server.ApplicationContext.lookup(ApplicationContext.java:63) at javax.naming.InitialContext.lookup(InitialContext.java:350) at gov.ga.gdc.bm.security.dao.ValidateLoginManager.getDatasource(ValidateLoginManager.java:365) at gov.ga.gdc.bm.security.dao.ValidateLoginManager.getDBConnection(ValidateLoginManager.java:400) at gov.ga.gdc.bm.security.dao.ValidateLoginManager.checkPassword(ValidateLoginManager.java:227) at gov.ga.gdc.bm.security.dao.ValidateLoginManager$UserWrapper.authenticate(ValidateLoginManager.java:305) at com.evermind.server.rmi.RMIConnection.run(RMIConnection.java:346) at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:64)
Can't get client app to work
I think it might be that sun-j2ee-ri.xml is specifying the jndi name, ejb-ref name binding, whereas orion is not parsing that file. I think you have to do it in orion-ejb-jar.xml to do the things equivalent to sun-j2ee-ri.xml does. You can find the orion-ejb-jar.xml in orion\application-deployments\your-app-name\your-ejb-jar-name\ . Copy it to your codebase and change it. Xiaowen
URGENT! JNI problem on Orion-Could Not Get Class for Java ....
We're having a problem running JNI (C++) from Orion enviorment. The original error message is: C++ CommIFCMSListener::processEvent - Could Not Get Class For Java CMSListener Object. The JNI method is called from a Java class, not EJB. The Java application is deployed into Orion Server. The JNI code runs fine outside of Orion, as well as on Borland AppServer. The problem seems to be, not able to find the call back Java enviornment from native to Java. From Java to native is fine. We're under pressure now to re-host our application on Orion. Please help as soon as you can Sincerely, YiYi
Servlet expiration
Does anyone know how to configure Orion so the servlet container never expires initialized servlets? Adam Kipnis JAMDAT Mobile [EMAIL PROTECTED] 310.636.3126 Why document? If it was hard to write, it should be hard to understand! -Me
Reg: Does any one has the BenchMarks of OC4J with Application Servers
Dear all, Does any one of our group have bench mark reports of OC4J wrt other Application Servers mainly WebLogic, Iplanet and IBM Web Sphere. Can we get the performance reports of OC4J and how much load it can handle. Please help in regard.. With warm regards Venkata
