Re: stupid question
Rather this is a very interesting question but not related to jsp
specifically.
In one simple word the answer is yes you can lock a static variable.
First, any member variable that you wish to make thread safe must be
declared private. Consider the following code:
public class MyPoint
{
public int x;
public int y;
public int getX()
{
return x;
}
public int getY()
{
return y;
}
public synchronized setX(int x)
{
this.x = x;
}
public synchronized getY(int y)
{
this.y = y;
}
}
If this were an ideal world, everyone would set x and y by calling setX()
and setY(), respectively. However, we all know that someone will come along
and set x or y directly, since we defined the members as public. And since
we defined x and y as public, it is reasonable for someone to come along and
access the variables directly. If we didn't want someone to access the
members directly, we shouldn't have declared them as public in the first
place! The only way to guarantee that threads will access x and y safely is
to declare them as private and provide synchronized access.
Nothing changes when you declare a member static. If you don't want some
thread to come along and bypass your careful synchronization, don't declare
the member public or protected.
Now, the question remains: how do we lock the member? Sometimes I think that
part of the confusion around synchronization stems from a misunderstanding
of what actually happens when you call synchronized(some_object). Calling
synchronized on some_object does not prevent access to some_object. Instead,
you must think of synchronized as a request to open a lock around some piece
of code for your thread. some_object is the lock that you wish to have
access to. Only one thread may hold a specific lock at any one time.
Making a static member thread safe is fairly simple once you understand what
really happens when you call synchronized. Here is a template to follow
(there are many more ways to do it, though):
class Safe {
... other class definitions ...
private static var;
public final synchronized static setVar( val)
{
var = val;
}
}
As a second option, you can also synchronize within the method. Which
approach you take will depend upon your code. However, in this example,
either way is equivalent, since a synchronized static method grabs the lock
on the class. You would use the second option if you were doing a lot of
processing inside of the method. That way you only synchronize when you have
to -- thus improving performance.
You would need to use synchronization within the method if you didn't want
to declare setVar() static. A nonstatic method declared as synchronized
locks on the instance, not the class. So, if you had more than one instance,
the member would no longer be thread safe.
-Original Message-
From: A mailing list about Java Server Pages specification and reference
[mailto:[EMAIL PROTECTED]]On Behalf Of ROLDAN, Gabriel raul
Sent: Monday, February 17, 2003 6:59 PM
To: [EMAIL PROTECTED]
Subject: stupid question
excuse this stupid and out of topic question, but.. ¿are static methods and
fields synchronized?
=
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Re: Production Server.
This is one question i just gave the answer to recently.. Yes tomcat 4.x is quite stable and you can use it in a produdction env. I have deployed my site in tc and till now no problems as such. You could integrate TC with IIS on NT or with Apache. You can check the following sites: http://webperformanceinc.com/library/ServletReport/ http://www.sdtimes.com/news/063/story2.htm cheers! vikram. -Original Message- From: A mailing list about Java Server Pages specification and reference [mailto:[EMAIL PROTECTED]]On Behalf Of Omer Tariq Sent: Tuesday, February 18, 2003 12:12 PM To: [EMAIL PROTECTED] Subject: Production Server. Hi there. I'm new to servlets and JSP and would like to know whether Tomcat is a good production server. The application is an Internet Accounts and Management System for hotels to enable them to charge guests according the the amount of time the connection was enabled for them (Switches shall be accessed via an SNMP API). No. of users would be 5- 10 (max). Thanks and regards, Omer _ The new MSN 8: advanced junk mail protection and 2 months FREE* http://join.msn.com/?page=features/junkmail === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Re: database connection problem
Hi,
To configure the connections , thr is basically to steps.
1. Create a Connection pool by giving the details of ur database and driver.
2. Create a Data Source with a JNDI name.
In ur Java class just use the JNDI name od the Data Source u have configured
to lookup
u can find the sample code in weblogic examples
all the best
Raju BSN
- Original Message -
From: "Shivan" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, February 18, 2003 11:18 AM
Subject: Re: database connection problem
> hi
> i am using bea weblogic for servlets and jsp. i have successfully
installed
> mysql and driver from web.
> I have installed the connectorJ driver and added it's jar to the
classpath.
> Anyone, working with this bea weblogic server in particular? where to
> mention mySQL db connections and what? i don't know how to see the
> connections of database-driver are successful with weblogic. please help!
> thanks
>
> -Original Message-
> From: A mailing list about Java Server Pages specification and reference
> [mailto:[EMAIL PROTECTED]]On Behalf Of Partha Ranjan Das
> Sent: Sunday, February 16, 2003 9:03 PM
> To: [EMAIL PROTECTED]
> Subject: Re: database connection problem
>
>
> Hi,
> Why are you returning Connection in the finally block? return it as usual
> outside the finally block. And also throw the Exception from catch block
so
> that you are aware that exception has really occured. Then handle it
> accordingly in the client.
> regards,
> Partha
>
> -Original Message-
> From: Deepak [mailto:[EMAIL PROTECTED]]
> Sent: Monday, February 17, 2003 10:22 AM
> To: [EMAIL PROTECTED]
> Subject: database connection problem
>
>
> Hi
>
> I am facing a frustrating problem here.
> I am having a login screen. When users enter username and pwd they are
> validated against a database (mysql). Everything is working perfectly.
> but some times users get a null pointer exception when they are logging
in.
> I suspect that the connection object being returned is null sometimes.
> but why is it occuring only some times ? other times eeverything is
working
> fine.
> I am using a class to connect to the db.
> Please read the code for the class belwo
>
> ***
> import java.sql.*;
> public class DBConnector{
> public Connection conn;
> public Connection connect() throws java.sql.SQLException{
> try{
> Class.forName("org.gjt.mm.mysql.Driver");
>
>
conn=DriverManager.getConnection("jdbc:mysql://192.168.0.4/WEBDB","test","te
> s
> t");
> }catch(Exception e){
> System.out.println(e.toString());
> }finally{
> return conn;
> }
> }
> }
> *
>
> In my login validation jsp page I use this line of code to connect to the
db
> DBConnector dbc=new DBConnector();
> conn=dbc.connect();
> SQL="select UserCode from t_users where
> Password=password(?)";
> pstmt=conn.prepareStatement(SQL);
>
> approximatley 200 users access my web application.
>
> Can you please explain whats wrong in my approach? Its kinda critical to
me.
> Any help wud be invaluable
> Thanx in advance
> Deepak
>
>
===
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> DIGEST".
>
> Some relevant archives, FAQs and Forums on JSPs can be found at:
>
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> *
> Disclaimer: The information in this e-mail and any attachments is
> confidential / privileged. It is intended solely for the addressee or
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> DIGEST".
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>
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[no subject]
Hi Gurus, I am new be in the Beans Programming with JSP. I want to use the Beans in my application . I have to retrieve the Group code and then from the group no get the Items from the Item Master. How I can use beans for this purpose? If I will pass the result set I got the array of the Items . But it will occupy the Resources on the server. What is the feasible solution for this Problem ? How to do this ? Please help me and show me the path. Thanks in Advance.. Snehal - The secret of getting ahead is getting started. The secret of getting start is breaking your complex overwhelming tasks into small manageable tasks, and then starting on the first one. === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Re: stupid question
vikramjit, I think he meant it in relevance to JSP.
correct me if I am wrong Roldan, but did u mean declaring static variables
and/or static methods declared in a jsp page...
if so no, you will need to implement synchronization... consider performance
and benefits of the approach as well.
-Original Message-
From: A mailing list about Java Server Pages specification and reference
[mailto:[EMAIL PROTECTED]]On Behalf Of Vikramjit Singh
Sent: Tuesday, February 18, 2003 12:13 AM
To: [EMAIL PROTECTED]
Subject: Re: stupid question
Rather this is a very interesting question but not related to jsp
specifically.
In one simple word the answer is yes you can lock a static variable.
First, any member variable that you wish to make thread safe must be
declared private. Consider the following code:
public class MyPoint
{
public int x;
public int y;
public int getX()
{
return x;
}
public int getY()
{
return y;
}
public synchronized setX(int x)
{
this.x = x;
}
public synchronized getY(int y)
{
this.y = y;
}
}
If this were an ideal world, everyone would set x and y by calling setX()
and setY(), respectively. However, we all know that someone will come along
and set x or y directly, since we defined the members as public. And since
we defined x and y as public, it is reasonable for someone to come along and
access the variables directly. If we didn't want someone to access the
members directly, we shouldn't have declared them as public in the first
place! The only way to guarantee that threads will access x and y safely is
to declare them as private and provide synchronized access.
Nothing changes when you declare a member static. If you don't want some
thread to come along and bypass your careful synchronization, don't declare
the member public or protected.
Now, the question remains: how do we lock the member? Sometimes I think that
part of the confusion around synchronization stems from a misunderstanding
of what actually happens when you call synchronized(some_object). Calling
synchronized on some_object does not prevent access to some_object. Instead,
you must think of synchronized as a request to open a lock around some piece
of code for your thread. some_object is the lock that you wish to have
access to. Only one thread may hold a specific lock at any one time.
Making a static member thread safe is fairly simple once you understand what
really happens when you call synchronized. Here is a template to follow
(there are many more ways to do it, though):
class Safe {
... other class definitions ...
private static var;
public final synchronized static setVar( val)
{
var = val;
}
}
As a second option, you can also synchronize within the method. Which
approach you take will depend upon your code. However, in this example,
either way is equivalent, since a synchronized static method grabs the lock
on the class. You would use the second option if you were doing a lot of
processing inside of the method. That way you only synchronize when you have
to -- thus improving performance.
You would need to use synchronization within the method if you didn't want
to declare setVar() static. A nonstatic method declared as synchronized
locks on the instance, not the class. So, if you had more than one instance,
the member would no longer be thread safe.
-Original Message-
From: A mailing list about Java Server Pages specification and reference
[mailto:[EMAIL PROTECTED]]On Behalf Of ROLDAN, Gabriel raul
Sent: Monday, February 17, 2003 6:59 PM
To: [EMAIL PROTECTED]
Subject: stupid question
excuse this stupid and out of topic question, but.. ¿are static methods and
fields synchronized?
=
To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff
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[no subject]
Hi Snehal, can u put ur question a lil bit clear? what do u mean by beans? EJB or normal Java Bean for Business Process? Regards Raju BSn - Original Message - From: "Snehal Pandya" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, February 18, 2003 4:38 PM > Hi Gurus, > I am new be in the Beans Programming with JSP. > I want to use the Beans in my application . > I have to retrieve the Group code and then from the group no get the Items > from the Item Master. > How I can use beans for this purpose? If I will pass the result set I got > the array of the Items . > But it will occupy the Resources on the server. > What is the feasible solution for this Problem ? > How to do this ? > Please help me and show me the path. > Thanks in Advance.. > > Snehal > > > > -- --- > > The secret of getting ahead is getting started. > The secret of getting start is > breaking your complex overwhelming > tasks into small manageable tasks, > and then starting on the first one. > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". > > Some relevant archives, FAQs and Forums on JSPs can be found at: > > http://java.sun.com/products/jsp > http://archives.java.sun.com/jsp-interest.html > http://forums.java.sun.com > http://www.jspinsider.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Re: stupid question
> -Original Message-
> From: A mailing list about Java Server Pages specification and reference
> [mailto:[EMAIL PROTECTED]]On Behalf Of Amit Ghaste
> Sent: Saturday, March 15, 2003 5:02 PM
> To: [EMAIL PROTECTED]
> Subject: Re: stupid question
>
>
> vikramjit, I think he meant it in relevance to JSP.
Did he? Coz i thought he said static variables and methods. Oops. But why in
jsp, put in bean, makes life much easier and follow the steps mentioned
below.
>
> correct me if I am wrong Roldan, but did u mean declaring static variables
> and/or static methods declared in a jsp page...
>
> if so no, you will need to implement synchronization... consider
> performance
> and benefits of the approach as well.
Yups thats true.. Since jsp's are not thread safe and many users can access
them.
>
> -Original Message-
> From: A mailing list about Java Server Pages specification and reference
> [mailto:[EMAIL PROTECTED]]On Behalf Of Vikramjit Singh
> Sent: Tuesday, February 18, 2003 12:13 AM
> To: [EMAIL PROTECTED]
> Subject: Re: stupid question
>
>
> Rather this is a very interesting question but not related to jsp
> specifically.
> In one simple word the answer is yes you can lock a static variable.
> First, any member variable that you wish to make thread safe must be
> declared private. Consider the following code:
>
> public class MyPoint
> {
> public int x;
> public int y;
>
> public int getX()
> {
> return x;
> }
> public int getY()
> {
> return y;
> }
> public synchronized setX(int x)
> {
> this.x = x;
> }
> public synchronized getY(int y)
> {
> this.y = y;
> }
> }
> If this were an ideal world, everyone would set x and y by calling setX()
> and setY(), respectively. However, we all know that someone will
> come along
> and set x or y directly, since we defined the members as public. And since
> we defined x and y as public, it is reasonable for someone to
> come along and
> access the variables directly. If we didn't want someone to access the
> members directly, we shouldn't have declared them as public in the first
> place! The only way to guarantee that threads will access x and y
> safely is
> to declare them as private and provide synchronized access.
> Nothing changes when you declare a member static. If you don't want some
> thread to come along and bypass your careful synchronization,
> don't declare
> the member public or protected.
> Now, the question remains: how do we lock the member? Sometimes I
> think that
> part of the confusion around synchronization stems from a misunderstanding
> of what actually happens when you call synchronized(some_object). Calling
> synchronized on some_object does not prevent access to
> some_object. Instead,
> you must think of synchronized as a request to open a lock around
> some piece
> of code for your thread. some_object is the lock that you wish to have
> access to. Only one thread may hold a specific lock at any one time.
> Making a static member thread safe is fairly simple once you
> understand what
> really happens when you call synchronized. Here is a template to follow
> (there are many more ways to do it, though):
>
> class Safe {
> ... other class definitions ...
> private static var;
>
> public final synchronized static setVar( val)
> {
> var = val;
> }
> }
> As a second option, you can also synchronize within the method. Which
> approach you take will depend upon your code. However, in this example,
> either way is equivalent, since a synchronized static method
> grabs the lock
> on the class. You would use the second option if you were doing a lot of
> processing inside of the method. That way you only synchronize
> when you have
> to -- thus improving performance.
> You would need to use synchronization within the method if you didn't want
> to declare setVar() static. A nonstatic method declared as synchronized
> locks on the instance, not the class. So, if you had more than
> one instance,
> the member would no longer be thread safe.
>
> -Original Message-
> From: A mailing list about Java Server Pages specification and reference
> [mailto:[EMAIL PROTECTED]]On Behalf Of ROLDAN, Gabriel raul
> Sent: Monday, February 17, 2003 6:59 PM
> To: [EMAIL PROTECTED]
> Subject: stupid question
>
>
> excuse this stupid and out of topic question, but.. ¿are static
> methods and
> fields synchronized?
>
> =
> To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff
> JSP-INTEREST".
> For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST
> DIGEST".
>
> Some relevant archives, FAQs and Forums on JSPs can be found at:
>
> http://java.sun.com/products/jsp
> http://archives.java.sun.com/jsp-interest.html
> http://forums.java.sun.com
> http://www.jspinsider.com
>
> ==
> =
> To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff
> JSP-INTEREST".
> For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST
> DIGEST".
>
JDBC Driver for Form Based Authentication
Hi Again, Thanks for the info on using Tomcat as production server Vikramjit. Another question: I want to be able to use form-based authentication using JDBCRealm and I have a doubt regarding setting Tomcat for it. The documentation says I should "place the JDBC driver in CATALINE_HOME/common/lib... Note that only JAR files are recognized." My question is how do I obtain a JDBC driver jar file? Thanks in advance, Omer _ STOP MORE SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Re: stupid question
I mean in general, beans for example.
the source of this question is my confussion about
the internals of reentrant functions and synchronization
-Mensaje original-
De: Amit Ghaste [mailto:[EMAIL PROTECTED]]
Enviado el: sábado, 15 de marzo de 2003 12:32
Para: [EMAIL PROTECTED]
Asunto: Re: stupid question
vikramjit, I think he meant it in relevance to JSP.
correct me if I am wrong Roldan, but did u mean declaring static variables
and/or static methods declared in a jsp page...
if so no, you will need to implement synchronization... consider performance
and benefits of the approach as well.
-Original Message-
From: A mailing list about Java Server Pages specification and reference
[mailto:[EMAIL PROTECTED]]On Behalf Of Vikramjit Singh
Sent: Tuesday, February 18, 2003 12:13 AM
To: [EMAIL PROTECTED]
Subject: Re: stupid question
Rather this is a very interesting question but not related to jsp
specifically.
In one simple word the answer is yes you can lock a static variable.
First, any member variable that you wish to make thread safe must be
declared private. Consider the following code:
public class MyPoint
{
public int x;
public int y;
public int getX()
{
return x;
}
public int getY()
{
return y;
}
public synchronized setX(int x)
{
this.x = x;
}
public synchronized getY(int y)
{
this.y = y;
}
}
If this were an ideal world, everyone would set x and y by calling setX()
and setY(), respectively. However, we all know that someone will come along
and set x or y directly, since we defined the members as public. And since
we defined x and y as public, it is reasonable for someone to come along and
access the variables directly. If we didn't want someone to access the
members directly, we shouldn't have declared them as public in the first
place! The only way to guarantee that threads will access x and y safely is
to declare them as private and provide synchronized access.
Nothing changes when you declare a member static. If you don't want some
thread to come along and bypass your careful synchronization, don't declare
the member public or protected.
Now, the question remains: how do we lock the member? Sometimes I think that
part of the confusion around synchronization stems from a misunderstanding
of what actually happens when you call synchronized(some_object). Calling
synchronized on some_object does not prevent access to some_object. Instead,
you must think of synchronized as a request to open a lock around some piece
of code for your thread. some_object is the lock that you wish to have
access to. Only one thread may hold a specific lock at any one time.
Making a static member thread safe is fairly simple once you understand what
really happens when you call synchronized. Here is a template to follow
(there are many more ways to do it, though):
class Safe {
... other class definitions ...
private static var;
public final synchronized static setVar( val)
{
var = val;
}
}
As a second option, you can also synchronize within the method. Which
approach you take will depend upon your code. However, in this example,
either way is equivalent, since a synchronized static method grabs the lock
on the class. You would use the second option if you were doing a lot of
processing inside of the method. That way you only synchronize when you have
to -- thus improving performance.
You would need to use synchronization within the method if you didn't want
to declare setVar() static. A nonstatic method declared as synchronized
locks on the instance, not the class. So, if you had more than one instance,
the member would no longer be thread safe.
-Original Message-
From: A mailing list about Java Server Pages specification and reference
[mailto:[EMAIL PROTECTED]]On Behalf Of ROLDAN, Gabriel raul
Sent: Monday, February 17, 2003 6:59 PM
To: [EMAIL PROTECTED]
Subject: stupid question
excuse this stupid and out of topic question, but.. ¿are static methods and
fields synchronized?
=
To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff
JSP-INTEREST".
For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST
DIGEST".
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Applet Image Issue
Hi,
I want to show an image on top of an applet but i couldnt. Can sombody
help
me here. I tried everything : z-index, iframe etc.
Heres my sample code
~``
Test
img.x
{
position:absolute;
left:0;
top:0;
z-index:1;
}
applet.x
{
position:absolute;
left:0;
top:0;
z-index:-1;
}
HI Applet
~~`
Regards,
Karthikeyan B
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Re: JDBC Driver for Form Based Authentication
> -Original Message- > From: A mailing list about Java Server Pages specification and reference > [mailto:[EMAIL PROTECTED]]On Behalf Of Omer Tariq > Sent: Tuesday, February 18, 2003 6:22 PM > To: [EMAIL PROTECTED] > Subject: JDBC Driver for Form Based Authentication > > > Hi Again, > Thanks for the info on using Tomcat as production server Vikramjit. You are welcome. Here i give you one more link Many web administrators (admins) enable servlets on their sites by establishing a connection between Apache and Tomcat by using an Apache module called "mod_jk," whose usage is growing very rapidly, as shown on this page: http://www.securityspace.com/s_survey/data/man.200205/apachemods.html?mod=bW 9kX2pr This rapid growth strongly suggests that Tomcat installations are also increasing rapidly. Of course, this data does not include those installations that use mod_webapp or mod_jk2 (for use with Apache 2.0), which can also be used to establish a connection between Apache and Tomcat. I do not know where to find data on the deployment of these two modules. Furthermore, some web admins use Tomcat as a web server (as well as a servlet container), and there is probably no data on those installations, either. You might want to investigate this page, too: http://www.securityspace.com/s_survey/data/man.200205/apachemods.html > Another question: > I want to be able to use form-based authentication using JDBCRealm and I > have a doubt regarding setting Tomcat for it. > The documentation says I should > "place the JDBC driver in CATALINE_HOME/common/lib... Note that only JAR > files are recognized." > My question is how do I obtain a JDBC driver jar file? Simple. rename the zip file of oracle(which i know gives as zip file) to jar file. Or if that does not work, extract the files and then make the jar file again. > > Thanks in advance, > Omer > > > _ > STOP MORE SPAM with the new MSN 8 and get 2 months FREE* > http://join.msn.com/?page=features/junkmail > > == > = > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff > JSP-INTEREST". > For digest: mailto [EMAIL PROTECTED] with body: "set > JSP-INTEREST DIGEST". > > Some relevant archives, FAQs and Forums on JSPs can be found at: > > http://java.sun.com/products/jsp > http://archives.java.sun.com/jsp-interest.html > http://forums.java.sun.com > http://www.jspinsider.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Oracle-JDBC Driver For Linux platform
sir/madam, I'm working in Linux platform.I want to connect Oracle driver in this platform.I need to know where Oracle driver is available to connect Oracle Db using JAVA. -thanks. _ The new MSN 8: smart spam protection and 2 months FREE* http://join.msn.com/?page=features/junkmail === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Wesley Choate/LWSI is out of the office.
I will be out of the office starting 02/17/2003 and will not return until 02/24/2003. If you need assistance, please e-mail [EMAIL PROTECTED] TTYL, Wesley === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
music site in jsp
hi friends, i am new to jsp and i have to make music site in jsp through which user will log on and have the facility to buy misic cd's and cassettes.will u pls gide me in this and can u tell how it would be possible that the user(client) can listen to the songs whose cd he or she is buying.its my proj work and my marks r dependent on to it.could u pls tewll me what can i do to make it better so that i could get better marks really need help shikha bhatia === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Replacing JSP with PHP?
Is it possible to replace JSP and use PHP to encapsulate our page rendering code? We're running a java servlet that needs to be integrated with a PHP front end. I've given up on trying to run php as a java servlet. I know this is a strange request, but thanks for any tips. -- Jiann-Ming Su [EMAIL PROTECTED] 404-712-2603 Development Team Systems Administrator General Libraries Systems Division === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Re: Using JSP to display blob as video
I think the original question refers to a video rather than an image.
All I believe is required is to:
i) Set the content header to the appropriate type - find out the
relevant one for mpg/avi/rm etc.
ii) Then just stream it to the OutputStream of the HttpServletResponse
object.
To the browser it will seem like just a normal video file and it can
deal with it appropriately.
Regards,
Peter
-Original Message-
From: A mailing list about Java Server Pages specification and reference
[mailto:[EMAIL PROTECTED]] On Behalf Of Martin
Sent: 25 August 2002 02:54
To: [EMAIL PROTECTED]
Subject: Re: Using JSP to display blob as video
Deepak-
assuming you already have a DB connection-
1)you retrieve the image from the db into a file on the server and
display
the image in a servlet using hte tag, OR
2)Use a servlet for displaying the image by setting
response.setContentType("image/gif") and then
open the connection to DB
read the blob
display the image
-Martin
- Original Message -
From: "Deepak D Uzagare" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, February 18, 2003 12:41 AM
Subject: Using JSP to display blob as video
> My BLOB object is a video file .Please suggest me a way to display
this
video file using jsp
>
>
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Re: Replacing JSP with PHP?
what are advantages of PHP over JSP? -Original Message- From: A mailing list about Java Server Pages specification and reference [mailto:[EMAIL PROTECTED]]On Behalf Of Jiann-Ming Su Sent: Tuesday, February 18, 2003 11:29 AM To: [EMAIL PROTECTED] Subject: Replacing JSP with PHP? Is it possible to replace JSP and use PHP to encapsulate our page rendering code? We're running a java servlet that needs to be integrated with a PHP front end. I've given up on trying to run php as a java servlet. I know this is a strange request, but thanks for any tips. -- Jiann-Ming Su [EMAIL PROTECTED] 404-712-2603 Development Team Systems Administrator General Libraries Systems Division === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Re: Replacing JSP with PHP?
PHP has no advantages over JSP. Maybe this is something you could have posted to the PHP mailing list? ; ) -Original Message- From: Shivan [mailto:[EMAIL PROTECTED]] Sent: Tuesday, February 18, 2003 3:15 PM To: [EMAIL PROTECTED] Subject: Re: Replacing JSP with PHP? what are advantages of PHP over JSP? -Original Message- From: A mailing list about Java Server Pages specification and reference [mailto:[EMAIL PROTECTED]]On Behalf Of Jiann-Ming Su Sent: Tuesday, February 18, 2003 11:29 AM To: [EMAIL PROTECTED] Subject: Replacing JSP with PHP? Is it possible to replace JSP and use PHP to encapsulate our page rendering code? We're running a java servlet that needs to be integrated with a PHP front end. I've given up on trying to run php as a java servlet. I know this is a strange request, but thanks for any tips. -- Jiann-Ming Su [EMAIL PROTECTED] 404-712-2603 Development Team Systems Administrator General Libraries Systems Division === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Re: Oracle-JDBC Driver For Linux platform
u can fing one at www.oracle.com -Original Message- From: A mailing list about Java Server Pages specification and reference [mailto:[EMAIL PROTECTED]]On Behalf Of S Senthil Raja Sent: Tuesday, February 18, 2003 7:00 AM To: [EMAIL PROTECTED] Subject: Oracle-JDBC Driver For Linux platform sir/madam, I'm working in Linux platform.I want to connect Oracle driver in this platform.I need to know where Oracle driver is available to connect Oracle Db using JAVA. -thanks. _ The new MSN 8: smart spam protection and 2 months FREE* http://join.msn.com/?page=features/junkmail === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Re: Replacing JSP with PHP?
On Tue, 18 Feb 2003, Shivan wrote: > what are advantages of PHP over JSP? > I don't think there is any. For us, we just happened to have stumbled onto a PHP front end and a java back end. Perhaps a better question for this group would be, is there a servlet based portal software like PostNuke? If there is, then my problem may be solved. -- Jiann-Ming Su [EMAIL PROTECTED] 404-712-2603 Development Team Systems Administrator General Libraries Systems Division === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Re: Replacing JSP with PHP?
Su check out http://www.stachanov.com/~alvin/lab/phpvsservlet/ in which all of the tests for PHP script ran faster than commensurate servlet Keep this in mind: 1)PHP is weakly typed (tries to covert datatypes for you) VS Servlet which has Strongly typed datatypes 2)PHP will require a PHP interpreter on your path 3)Graphics Rendering Packages which are readily available for Java will support PHP only as a last result. 4)Ability to build reusable components such as beans are strictly limited 5)Inheritance Polymorphism and Encapsulation rules cannot apply to non OO Language such as PHP (Architect may not allow PHP implementation for these reasons) -Martin - Original Message - From: "Jiann-Ming Su" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, February 18, 2003 4:33 PM Subject: Re: Replacing JSP with PHP? > On Tue, 18 Feb 2003, Shivan wrote: > > > what are advantages of PHP over JSP? > > > > I don't think there is any. For us, we just happened to have stumbled > onto a PHP front end and a java back end. Perhaps a better question for > this group would be, is there a servlet based portal software like > PostNuke? If there is, then my problem may be solved. > > -- > Jiann-Ming Su [EMAIL PROTECTED] 404-712-2603 > Development Team Systems Administrator > General Libraries Systems Division > > === > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". > For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". > > Some relevant archives, FAQs and Forums on JSPs can be found at: > > http://java.sun.com/products/jsp > http://archives.java.sun.com/jsp-interest.html > http://forums.java.sun.com > http://www.jspinsider.com > === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
(struts in action ) looking for the artimus sql file
Hi, I just bought the book "Struts in Action" where can I find the sql file to create the database and tables for artimus application. thanks _ Protect your PC - get McAfee.com VirusScan Online http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
JSTL and Vector
Hi I am quite new to taglibs. I want to print values in vector or
Iterator.
If I use the following code it is not displaying any thing please help
me.
Thanks,
Murali
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core"; %>
<%!
java.util.Vector v = new java.util.Vector();
%>
<%
v.addElement("Garre");
v.addElement("Rama");
v.addElement("Murali");
v.addElement("Mohan");
%>
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Re: JSTL and Vector
Murali Mohan wrote:
Hi I am quite new to taglibs. I want to print values in vector or
Iterator.
If I use the following code it is not displaying any thing please help
me.
Thanks,
Murali
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core"; %>
<%!
java.util.Vector v = new java.util.Vector();
%>
<%
v.addElement("Garre");
v.addElement("Rama");
v.addElement("Murali");
v.addElement("Mohan");
%>
You need to make the Vector visible to the JSTL EL as well; scripting
variables are only visible to other scripting code, not to actions
such as the action or the EL. To make it visible, save a
reference in one of the JSP scopes, e.g. like this:
<% pageContext.setAttribute("v", v); %>
to save the reference in the page scope.
Hans
--
Hans Bergsten<[EMAIL PROTECTED]>
Gefion Software
SERACH ENGINE
hi friends, i am new to jsp and i have to make music site in jsp through which user will log on and have the facility to buy misic cd's and cassettes. THX FOR UR PREVOIUS HELP BUT COULD U PLS TELL ME WHAT ELSE I COULD INCLUDE TO MAKE IT BETTER SO THAT I COULD GET GOOD MARKS.THE CLIENT CAN ALSO SEARCH THE CD'S ON BASIS OF SINGER NAME ETC.SO HOW COULD I IMPLEMENT A SEARCH ENGINE THROUGH JSP.THE CLIENT CAN ALSO PERSONALIZE THE SITE ACCORDING TO HIS CHOICE LIKE BACKGROUND COLOR ETC. PLS HELP really need help shikha bhatia === To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Re: JSTL and Vector
Thanks to your reply. It is working.
But If I have 10 vectors to display data , Should I put 10 in session(or some
scope) before displaying data??
Can't I use set tag to make it visible?
like.
Thanks,
Murali
Hans Bergsten wrote:
> Murali Mohan wrote:
> > Hi I am quite new to taglibs. I want to print values in vector or
> > Iterator.
> > If I use the following code it is not displaying any thing please help
> > me.
> >
> > Thanks,
> > Murali
> >
> > <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core"; %>
> >
> >
> >
> > <%!
> > java.util.Vector v = new java.util.Vector();
> > %>
> > <%
> > v.addElement("Garre");
> > v.addElement("Rama");
> > v.addElement("Murali");
> > v.addElement("Mohan");
> > %>
> >
> >
> >
> >
> >
> >
> >
> >
>
> You need to make the Vector visible to the JSTL EL as well; scripting
> variables are only visible to other scripting code, not to actions
> such as the action or the EL. To make it visible, save a
> reference in one of the JSP scopes, e.g. like this:
>
><% pageContext.setAttribute("v", v); %>
>
> to save the reference in the page scope.
>
> Hans
> --
> Hans Bergsten<[EMAIL PROTECTED]>
> Gefion Software
[no subject]
I'm invoke Dialog in Applet environment. Can remove status bar from the Dialog? How? ==To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant archives, FAQs and Forums on JSPs can be found at: http://java.sun.com/products/jsp http://archives.java.sun.com/jsp-interest.html http://forums.java.sun.com http://www.jspinsider.com
Re: JSTL and Vector
Murali Mohan wrote:
Thanks to your reply. It is working.
But If I have 10 vectors to display data , Should I put 10 in session(or some
scope) before displaying data??
Which scope you select depends on the data, for instance if it rarely
changes and is the same for all users, the application scope may be
the best, if it's different per user but stays the same throughout the
session, use the session scope, etc.
Can't I use set tag to make it visible?
like.
If you use servlets for the business logic and JSP pages only for
the user interface, the servlets typically put items like this in
the appropriate scope. If you only use JSP pages, a custom action
("tag") that creates the data could also save it directly in a scope.
For the simple example you provided, where the data is created as a
Vector in a scriptlet, you must also use a scriptlet to save the
reference; there's no way any action (standard or custom) can get
hold of the value of a scripting variable and do anything with it.
For instance, above you have just moved the problem to the
action instead of the action: ${v} can only be resolved
if "v" is a variable (reference) in one of the JSP scopes.
I describe this in much more detail in my book. See the signature at
the end for more info.
Hans
Hans Bergsten wrote:
Murali Mohan wrote:
Hi I am quite new to taglibs. I want to print values in vector or
Iterator.
If I use the following code it is not displaying any thing please help
me.
Thanks,
Murali
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core"; %>
<%!
java.util.Vector v = new java.util.Vector();
%>
<%
v.addElement("Garre");
v.addElement("Rama");
v.addElement("Murali");
v.addElement("Mohan");
%>
You need to make the Vector visible to the JSTL EL as well; scripting
variables are only visible to other scripting code, not to actions
such as the action or the EL. To make it visible, save a
reference in one of the JSP scopes, e.g. like this:
<% pageContext.setAttribute("v", v); %>
to save the reference in the page scope.
Hans
--
Hans Bergsten<[EMAIL PROTECTED]>
Gefion Software
