php-java-bridge-users

[Php-java-bridge-users] RMI problem

[Mikael G. <mi...@oe...>]

Hi!
Having problem when using rmi with php-java-bridge-2.0.8. Trying the 
following php code:
<?php
/*
 * Load Java Bridge
 */
if (!extension_loaded('java')) {
  if (!(PHP_SHLIB_SUFFIX=="so" && 
dl('java.so'))&&!(PHP_SHLIB_SUFFIX=="dll" && dl('php_java.dll'))) {
    echo "java extension not installed.";
    exit(2);
  }
}

$here=getcwd();
java_require("$here/jpos-1.4.6.jar");
java_require("$here/myClasses.jar");

// Get an ISOMsg handle and do something with it
$ISOMsg = new java("org.jpos.iso.ISOMsg"); 
$ISOMsg->setMTI ("0260");


$lookup = new java_class("java.rmi.Naming");
$cekrm = new java("se.certitrade.myServerRemote");
$cekrm = $lookup->lookup("//www.somedomain.net/myServer");

?>

The rmi call passes an ISOMsg object that is part of the jpos-1.4.6.jar 
package. The myServerRemote java looks like:

package se.certitrade;
import java.rmi.Remote;

public interface myServerRemote extends Remote {
   ISOMsg sendTransaction(ISOMsg msg) throws RemoteException;
}

When I try to run the php file I get:
java.lang.ClassNotFoundException: Unresolved external reference: 
java.lang.NoClassDefFoundError: org/jpos/iso/ISOMsg. -- Unable to call 
the method because it or one of its parameters refer to the mentioned 
external class which is not available in the current 
"java_require(<path>)" url path. Remember that all interconnected 
classes must be loaded with a single java_require() call and that a 
class must not appear in more than one java_require() call. Please check 
the Java Bridge log file for details.
        at php.java.bridge.JavaBridge.Invoke(JavaBridge.java:1150)
        at php.java.bridge.Request.handleRequest(Request.java:204)
        at php.java.bridge.Request.handleRequests(Request.java:221)
        at php.java.bridge.JavaBridge.run(JavaBridge.java:233)
        at php.java.bridge.ThreadPool$Delegate.run(ThreadPool.java:20)
Caused by: java.lang.NoClassDefFoundError: org/jpos/iso/ISOMsg
.
.

This happens when the lookup method in the php-file is run. ISOMsg is 
(obviously) already instanciated and available. How do I get around this?

Best regards

/Mikael

Problem loading classes with java_require (Was: [Php-java-bridge-users] RMI problem)

[Jost B. <jos...@ya...>]

Hi Mikael,

> java_require("$here/jpos-1.4.6.jar");
> java_require("$here/myClasses.jar");
[...]
> The myServerRemote java looks like:
> sendTransaction(ISOMsg msg)
[...]
> The rmi call passes an ISOMsg object that is part of
> the jpos-1.4.6.jar 
[...]
> Unresolved external reference:
java.lang.NoClassDefFoundError: org/jpos/iso/ISOMsg
[...] happens when the lookup method in the php-file
is run

as I understand the above problem ISOMsg is not
available to your classes because you haven't required
it (you have required it for the bridge, but not for
your classes).

This behaviour is intentional, please see the
tests.php4/NoClassDefFound tests. For example the
server part could easily require a different version
of jpos or it could only require the stub classes.

Isn't it possible to require jpos for your classes,
too?

Does

# reset the classloader once
echo '<?php java_reset(); ?>' |/usr/bin/php

<?php
[...]
java_require("jpos-1.4.6.jar");
java_require("myClasses.jar;jpos-p.x.y.jar");
[...]
?>

solve the problem?

If so, this means that the PHP/Java Bridge
documentation is broken. I think I need a hint how to
reformulate the sentence "all interconnected classes
must be loaded by the same classloader".


Regards,
Jost Boekemeier




	

	
		
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[Php-java-bridge-users] Re: Problem loading classes with java_require (Was: [Php-java-bridge-users] RMI problem)

[Mikael G. <mi...@oe...>]

Hello Jost.
Thanks for quick reply. The bridge is really good stuff, hopefully I can 
get i working for this app as well...

Jost Boekemeier wrote:

>Hi Mikael,
>
>  
>
>>java_require("$here/jpos-1.4.6.jar");
>>java_require("$here/myClasses.jar");
>>    
>>
>[...]
>  
>
>>The myServerRemote java looks like:
>>sendTransaction(ISOMsg msg)
>>    
>>
>[...]
>  
>
>>The rmi call passes an ISOMsg object that is part of
>>the jpos-1.4.6.jar 
>>    
>>
>[...]
>  
>
>>Unresolved external reference:
>>    
>>
>java.lang.NoClassDefFoundError: org/jpos/iso/ISOMsg
>[...] happens when the lookup method in the php-file
>is run
>
>as I understand the above problem ISOMsg is not
>available to your classes because you haven't required
>it (you have required it for the bridge, but not for
>your classes).
>
>This behaviour is intentional, please see the
>tests.php4/NoClassDefFound tests. For example the
>server part could easily require a different version
>of jpos or it could only require the stub classes.
>
>Isn't it possible to require jpos for your classes,
>too?
>  
>
Actually I do require jpos for my classes - in ServerRemote the import 
where hidden by eclipse - they actually look like:
package se.certitrade;
import java.rmi.Remote;
import java.rmi.RemoteException;
import org.jpos.iso.ISOMsg;

public interface ServerRemote extends Remote {
.
.
Sorry about that.

The server side also requires jpos ISOMsg and all other used jpos 
classes (all from the same version of jpos).

>Does
>
># reset the classloader once
>echo '<?php java_reset(); ?>' |/usr/bin/php
>
><?php
>[...]
>java_require("jpos-1.4.6.jar");
>java_require("myClasses.jar;jpos-p.x.y.jar");
>[...]
>?>
>
>solve the problem?
>  
>
Nope, sorry made no difference, maybe something I've missed or don't 
understand here?...........

Regards

/Mikael

Ant: [Php-java-bridge-users] Re: Problem loading classes with java_require (Was: [Php-java-bridge-users] RMI problem)

[Jost B. <jos...@ya...>]

Hi Mikael,

> Actually I do require jpos for my classes - in
> ServerRemote the import

import != java_require. the import is only syntactic
shugar for the java compiler. The NoClassDefFoundError
means that you have used import at compile-time but
you have failed to add the classes at run-time.


> The server side also requires jpos ISOMsg 

java_require("jpos.jar") doesn't magically make the
classes within jpos available to your own classes. It
makes them available to the PHP/Java Bridge, but not
to the classes within myClasses.jar.

The noClassDefFound2.php test checks this pattern,
please see
http://cvs.sourceforge.net/viewcvs.py/php-java-bridge/php-java-bridge/tests.php4/noClassDefFound1.php?rev=1.2&view=markup

The pattern 

 java_reset();
 java_require("foo.jar"); java_require("my.jar");

must fail because foo is not available to my, but

 java_reset(); java_require("foo.jar;my.jar");

must succeed.


> Nope, sorry made no difference

Can you please set java.log_level=4, re-start the
bridge, run the test and attach the log to a ticket? 
Please see
http://sourceforge.net/tracker/?func=add&group_id=117793&atid=679233


Regards,
Jost Boekemeier



	

	
		
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[Php-java-bridge-users] Re: Problem loading classes with java_require (Was: [Php-java-bridge-users] RMI problem)

[Mikael G. <mi...@oe...>]

Jost Boekemeier wrote:

>java_require("myClasses.jar;jpos-p.x.y.jar");
>
>solve the problem?
>  
>
Yes it solved the problem! Sometimes it's so hard to see obvious 
things....sigh...
Thanks a million for pointing this out. The bridge is really a cool tool.

Regards

/Mikael