php-java-bridge-users Mailing List for PHP/Java Bridge

I was trying to use the jFuzzyLogic toolkit with PHP/Java bridge but I
got some error. The PHP/Java bridge I use is 5.1.0 and the jFuzzyLogic
is 1.2.1. Here's my code:

<?php

	if(!extension_loaded("java"))
		require_once("JavaBridge/java/Java.inc");
	java_require("jFuzzyLogic_1_2_1.jar");
	$fis = new Java("net.sourceforge.jFuzzyLogic.FIS");
	$fis->load("fcl/tipper.fcl");
	if( $fis == null ) {
		echo "<p>Can't load file</p>";
	}
	else {
		echo "<p>Load succeed</p>";
	}
	$fuzzyRuleSet = $fis->getFuzzyRuleSet("tipper");
	if( $fuzzyRuleSet == null ) {
		echo "<p>Can't get fuzzy rule set</p>";
	}
	else {
		echo "<p>Get fuzzy rule set succeed</p>";
	}
	
	$temp = $fuzzyRuleSet->toString();

	echo "<p>fuzzy rule set<br />" . $temp . "</p>";

?>

And the output is:

Load succeed

Get fuzzy rule set succeed

Fatal error: Uncaught [[o:Exception]:"java.lang.Exception: Invoke
failed: [[o:Request$PhpNull]]->toString. Cause:
java.lang.NullPointerException: call object is null, check the server
log file(s). VM: 1.5.0@http://www.ibm.com/" at: #-5
php.java.bridge.JavaBridge.Invoke(JavaBridge.java:1016) #-4
php.java.bridge.Request.handleRequest(Request.java:409) #-3
php.java.bridge.Request.handleRequests(Request.java:485) #0
C:\temp\Terry\xampp\htdocs\Thesis_Dexiong_Terry_Zhang\JavaBridge\java\Java.inc(259):
java_ThrowExceptionProxyFactory->getProxy(4, 'php.java.bridge...',
true) #1 C:\temp\Terry\xampp\htdocs\Thesis_Dexiong_Terry_Zhang\JavaBridge\java\Java.inc(411):
java_Arg->getResult(true) #2
C:\temp\Terry\xampp\htdocs\Thesis_Dexiong_Terry_Zhang\JavaBridge\java\Java.inc(417):
java_Client->getWrappedResult(true) #3
C:\temp\Terry\xampp\htdocs\Thesis_Dexiong_Terry_Zhang\JavaBridge\java\Java.inc(621):
java_Client->getResult() #4
C:\temp\Terry\xampp\htdocs\Thesis_Dexiong_Terry_Zhang\JavaBridge\java\Java.inc(1749):
java_Client->invokeMeth in
C:\temp\Terry\xampp\htdocs\Thesis_Dexiong_Terry_Zhang\JavaBridge\java\Java.inc
on line 222

According to the documentation, toString() is a legal method in the
FuzzyRuleSet class and the jFuzzyLogic toolkit is tested in java and
works fine. Does anyone know how come I get this error? Any help will
be appreciated. Thanks a lot!!!


Terry

Please see the INSTALL.STANDALONE for details how to invoke methods within a running Java process.


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You probably have an old JavaBridge.jar in the global classpath. Either in /usr/share/java or /usr/java/default/


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>  the protocol has been changed from version 4 to version 5:

Jost, we do not understand why our JavaBridge is appearing to be 4...
we copied the JavaBridge.jar file and we are running it like this:

java -Dphp.java.bridge.base=/opt/javabridge -jar
/opt/javabridge/JavaBridge.jar SERVLET:8080 6 javabridge_log &

On our server (Ubuntu Dapper) it works fine and  the log file
(javabridge_log) shows VMBridge version : 5.2.0, but on our dev box it
shows up as VMBridge version : 4.3.0, even though it is *exactly* the
same identical JavaBridge.jar file (extracted from JavaBridge.war
/WEB-INF/lib/). We double-checked to make sure it was the same file.
Any ideas what we are doing wrong?

Thanks!

Cheers,


Antonio

Hi,

I'm trying to get my php-java bridge working but without success. Php
communicates well with Java but my problem is that i can't access (more
precisely, don't know how to access) to a running object. How would I do to
get an instance of this object ? To be more clear, an application is lauched
with the java command. I want to access to some parameters to show them
using Php, while the application is still running, doing some other
treatment.

Thanks for your precious help
Thomas
-- 
#  !! brOl_oUilLe -->

Hi,

> 2. as for tomcat. any idea how would my php(apache)
> communicate with java(tomcat) 

please see the INSTALL.J2EE document for details.


IBM has a more detailed description at:

http://www.ibm.com/developerworks/aix/library/au-javaphpaix5/





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hi,
 thanks for the quick reply. 

1. i've seen some documents from the internet. there
seems to be success running the dll with php+apache.
Particulary this version of bridge
"php-java-bridge_3.2.1b_j2ee.zip", it seems that this
copy is nowhere to be found here. is it possible for
me to download the binary version of this ? 


2. as for tomcat. any idea how would my php(apache)
communicate with java(tomcat) ? would you recommend
running php+java/php bridge on a single tomcat? 


thanks!

--- php...@li... wrote:

> Hi,
> 
> >  i'm interested to run php/java to call ireport,
> 
> on windows you'll need Tomcat or some other servlet
> engine as a back end.
> 
> This is necessary because the windows version of gcc
> cannot compile the bridge
> to native code. 
> 
> 
> > no knowledge on java programming.
> 
> Just click on 
> 
>
http://ftp.halifax.rwth-aachen.de/apache/tomcat/tomcat-6/v6.0.16/bin/apache-tomcat-6.0.16.exe
> 
> and install tomcat as a windows service. 
> 
> Then copy JavaBridge.war to
> c:/program files/apache software
> foundation/tomcat/webapps/, wait a second until 
> c:/program files/apache software
> foundation/tomcat/webapps/JavaBridge/ appears and
> copy
> this directory over to your web server document
> root.
> 
> 
> Regards,
> Jost Boekemeier
> 
> 
> 
>       Heute schon einen Blick in die Zukunft von
> E-Mails wagen? www.yahoo.de/mail
> 
>
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Hi,

the protocol has been changed from version 4 to version 5:

	case 'V':
	  if ($st['n']!='T') {
		if(JAVA_DEBUG) {echo "setresult VOID:"; echo "\n";}
		$arg->setVoidSignature();
	  }

Since version 5.0.0 the back end sends a flag which indicates that the result should be cached.


Please upgrade both, the back end and the front end.


Regards,
Jost Boekemeier



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> Old documentation states that the "java.so" C implementation was 10
> times faster than the "pure PHP" implementation of the PHP/Java
> Bridge.

As of PHP 5.1.4 this is no longer the case.


> Besides the fact that the pure PHP implementation is much easier to
> setup, is there a reason why the C implementation was deprecated,

The bottleneck are the java reflection calls, which is common to all JSR 223 script engines.
PHP 4 is no longer supported, so we were able to remove the old C bindings.


Regards,
Jost Boekemeier



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We got the PHP/Java Bridge 5.2.0 running fine on two boxes (one WinXP,
the other one Ubuntu Dapper) but on the third box we get this php
notice:

Notice: Undefined index: n in library/java/Java.inc on line 505

The bridge works fine but the notice is a bit annoying.

We are using exactly the same code. Any ideas?

Thanks!


Antonio

Just wondering...

Old documentation states that the "java.so" C implementation was 10
times faster than the "pure PHP" implementation of the PHP/Java
Bridge.

Besides the fact that the pure PHP implementation is much easier to
setup, is there a reason why the C implementation was deprecated,
considering it is 10 times faster? Or is that no longer the case?

Cheers,


Antonio

Hi,

>  i'm interested to run php/java to call ireport,

on windows you'll need Tomcat or some other servlet engine as a back end.

This is necessary because the windows version of gcc cannot compile the bridge
to native code. 


> no knowledge on java programming.

Just click on 

http://ftp.halifax.rwth-aachen.de/apache/tomcat/tomcat-6/v6.0.16/bin/apache-tomcat-6.0.16.exe

and install tomcat as a windows service. 

Then copy JavaBridge.war to
c:/program files/apache software foundation/tomcat/webapps/, wait a second until 
c:/program files/apache software foundation/tomcat/webapps/JavaBridge/ appears and copy
this directory over to your web server document root.


Regards,
Jost Boekemeier



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hi, 
 i'm using 
apache 
php 5.2
winxp sp2 
jdk 1.5.0_05-b05

 i'm interested to run php/java to call ireport,i have
no knowledge on java programming. i've downloaded
php-java-bridge_5.2.0_j2ee , but did not find any
java-x86-windows.dll. anyone knows where i can find
this extension so i can put it into my php extension?
i can only find php-4-java-x86-windows.dll which i
believe only runs for php4. 

thanks and regards  


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>  > I also tried with:
>  > $upload_id = (int)$upload_response->getUploadId();
>
>  $upload_id = (int)(string)$upload_response->getUploadId();
>
>  should work. Please ask the PHP developers why the extra (string) cast is necessary...

It works! Very easy to setup the new JavaBridge. Excellent work,
congratulations!

Cheers,


Antonio

Dear Mr. Boekemeier,

thanks a lot, I'll look at it...

Greetings,
Matthias

Hi,

> Is a real java object created? And if I use methods of this java object,
> does the bridge send it to the object, make the needed operations and
> send the return value back?

Yes, the bridge uses XML RPC.


> I'm sorry, I have read the "How it works" part more than once, but I'm
> still not sure how it works... :o)

If you set the log level to 4 or above, you should be able to see the XML communication. Please
see the PROTOCOL.TXT for details.


Regards,
Jost Boekemeier



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Good Morning together,

I have a general question, what exactly is created if I use that code:

$str = new Java("java.lang.String","Hello");
echo $str;

I use a php environment and like to integrate a java application.
The other examples look like the bridge is reflecting the code to php.

Is a real java object created? And if I use methods of this java object,
does the bridge send it to the object, make the needed operations and
send the return value back?

I'm sorry, I have read the "How it works" part more than once, but I'm
still not sure how it works... :o)

Greetings,
Matthew