php-java-bridge-users Mailing List for PHP/Java Bridge (Page 99)

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Good day all,

I apologize in advance if this question is answered in documentation --
I'm having trouble find mention of it.

I'm encountering an issue with a new php-cgi process being created on
each request, and not being terminated until servlet restart when
running PJB as "java -jar JavaBridge.jar SERVLET_LOCAL:8080 3
JavaBridge.log".

I feel like this isn't/shouldn't be normal behavior and that I may be
missing a configuration hook or scripting cue that let's PJB know to
shutdown the php-cgi process.

Any help would be appreciated.

P.S. Additionally, the examples at the bottom of INSTALL.J2SE have the
line "e.eval((Reader)null);".  What is that line used for?

- --
Darian Anthony Patrick, ZCE, GWAS
Principal, Application Development
Criticode LLC
(215) 240-6566 Office
(866) 789-2992 Facsimile
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Email: da...@cr...
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Hi Andre,


> I was trying to build from latest cvs tree and stopped at some problems.

you need the latest javax.script API, which is part of JDK 1.6. 
Do you use the main branch or 3.2.1?

I have had some patches to upgrade Sanka's open-source script API contained in server/javax/script
and applied them to the main branch.  However, the 3.2.1 branch still contains the old interfaces.


> symbol  : method getErrorWriter()
> location: interface javax.script.ScriptContext

Sounds as if you have old classes in your path. getErrorWriter() is there:
http://php-java-bridge.cvs.sourceforge.net/php-java-bridge/php-java-bridge/server/javax/script/ScriptContext.java?revision=1.4&view=markup&sortby=date


Regards,
Jost Boekemeier



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Hi,

>   I think the URL split() used in version 4.1.7 caused this. In version 4.1.8 this 
>   problem disappeared (for me).

which URL split() do you mean?


>   BTW: Is it possible to use Java.inc with version 3.2.1?

No, I don't think so. Version 4.x uses an enhanced protocol which tries to avoid round-trips as
much as possible. In order to make this work correctly, the bridge needs two interfaces, which
currently don't exist in the php core. 

We could implement them ourselfs in java.c. But the java.c contained in version 4 is a fake, used
only for backward compatibility.


Regards,
Jost Boekemeier



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Hi,

> It appears that the problem I was having with fread() errors (which, by the way, Jost, I
> couldn't find any errors in the logs.  Where would I find this log? Tomcat should report the
> error, shouldn't it?)

yes. -- The php.java.bridge.default_log_level is 3, which means that exceptions and errors are
logged to the tomcat error log (usually called logs/NODENAME_date). 


> has to do with a JavaScript function interfering with Java.  I guess

Can you please open a problem report (please use
http://sourceforge.net/tracker/?func=add&group_id=117793&atid=679233), set the log level to 5 and
attach the log there?

Maybe it is possible to also attach the request headers, obtained by adding the following line to
Java.inc (line 265 in the current code
http://php-java-bridge.cvs.sourceforge.net/php-java-bridge/php-java-bridge/server/META-INF/java/Protocol.inc?revision=1.11&view=markup):

  echo "request header::$str<br>\n";


I suspect that PHP could not parse the request headers correctly, probably because the back end
has sent both, the PHP cookie and the JAVA cookie in an unusual way. -- I could not reproduce
this,  just a guess. They should be separated by a "; " and the value should be properly
URLEncoded.

Basically the bridge simply forwards the request URL to the back-end. I think what happened is
that Java.inc has sent a garbage URL to tomcat and tomcat responded with a HTML error message. The
bridge failed to detect the error condition and tried to parse the HTML error as a PHP/Java Bridge
protocol response.


> That is what appears is happening with the setCookie function that exists in java.inc as well as

Yes, setCookie could be smarter. It should detect if the value is properly URLEncoded for example.
I will check this.


Regards,
Jost Boekemeier



      __________________________________  
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Hi Filip,

> Actually, the jar files are not in a remote server. 

then it is better to use a local URL. For example:

$here=getcwd();
java_require("$here/jar1.jar;$here/jar2.jar;...");


> could it be (another) Java classpath problem?  All the

I don't think so.


> jar files inside java_require() should be in my Java
> classpath right?

No. -- Forget about the java classpath, this is an insane concept.
Please use the jar repository or java_require() instead.


> I assume that is what java_reset() does(?).

Yes. It clears the loader cache, which means that the dynamic loader
must load the classes again and again.


> did this because sometimes my Wiki runs sluggishly
> after I visit a page that invokes PHP-Java Bridge. 
> That is true, even if the next pages I view do not use
> PHP-Java Bridge anymore.  

Interesting. Java runs as a separate process. The only common
resource used by both processes is memory. Or this is a placebo
effect.


> java_reset()?  Maybe, from an old local copy of some
> website?

It was documented in java.c, which doesn't exist anymore. But AFAIK
the documentation contained a warning that java_reset() should never
be used in user scripts.

If you have still performance problems please open a new ticket and 
add a 

  echo java("java.lang.System")->currentTimeMillis();

to the beginning and the end of the script.


Regards,
Jost Boekemeier



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Hi Jost!

> the code pulls the java libraries from a remote 
> server... Fetching jar files from a HTTP url is
> expensive,especially if you don't allow the bridge
> to cache them.

Actually, the jar files are not in a remote server. 
They are in my PC which I am using as both server and
client.  For some reason, the simple syntax below
would not work:

   java_require("myJarFile1.jar;myJarFile2.jar;...");

That is why I switched to using HTTP urls.  Hmmm...
could it be (another) Java classpath problem?  All the
jar files inside java_require() should be in my Java
classpath right?

>Furthermore you remove all cached libraries at the
>end of the script, probably to emulate the dynamic
>behaviour which is switched off for remote URL's.  

I assume that is what java_reset() does(?).  I think I
did this because sometimes my Wiki runs sluggishly
after I visit a page that invokes PHP-Java Bridge. 
That is true, even if the next pages I view do not use
PHP-Java Bridge anymore.  

Hmmm... okay, I'll try your suggestions and hope that
fixes the problem.   I wonder where I got
java_reset()?  Maybe, from an old local copy of some
website?

Regards,

Filip

Send instant messages to your online friends http://uk.messenger.yahoo.com 

It appears that the problem I was having with fread() errors (which, by the way, Jost, I couldn't find any errors in the logs.  Where would I find this log? Tomcat should report the error, shouldn't it?) has to do with a JavaScript function interfering with Java.  I guess they're so similar in terms of syntax that functions that happen to have the same name clash.  That is what appears is happening with the setCookie function that exists in java.inc as well as many JavaScript based web applications that use cookies.  Of course, I don't have to use JavaScript to set cookies, so I'll be finding a different way to set cookies I need to set.

--Nathan Shaskin
Compliance Publishing

php...@li... wrote: hello!
  
  I think the URL split() used in version 4.1.7 caused this. In version 4.1.8 this 
  problem disappeared (for me).
  
  BTW: Is it possible to use Java.inc with version 3.2.1?
  
  

       
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hello!
  
  I think the URL split() used in version 4.1.7 caused this. In version 4.1.8 this 
  problem disappeared (for me).
  
  BTW: Is it possible to use Java.inc with version 3.2.1?
  
  

       
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Hi,

the code pulls the java libraries from a remote server. Furthermore you remove all cached
libraries at the end of the script, probably to emulate the dynamic behaviour which is switched
off for remote URL's.  Fetching jar files from a HTTP url is expensive, especially if 
you don't allow the bridge to cache them.

Please do NOT use the following:

 java_require("http://myServer.com/myJarFile1.jar;http://myServer.com/myJarFile2.jar;...");
 ... execute PHP code ...
 @java_reset(); 
 
In the next version of the bridge I will remove java_reset() entirely and disallow remote
URL's[1].


Regards,
Jost Boekemeier

[1] Neither is documented, so this shouldn't be a problem for most users. :)



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Hi,

> Fatal error: php_mod_java(98): Call object is null: The connection to the

there is nothing wrong with it. 

It means that you use an old php_java.dll or java.so in connection with a recent back end.
I have removed all legacy code in version 4.x, so if you use persistent connections and the
php_java.dll, I'd expect this error on the client side. However, you should see a clear exception
message in the back end.

Please use the pure PHP PHP/Java Bridge implementation instead. If you want to use PHP4, which
cannot execute the PHP 5 code contained in Java.inc, make sure to use the latest php_java.dll.

Or use the stable version 3.2.1 instead.


Regards,
Jost Boekemeier



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Hi,

> an update on the fread() errors below: 

a short read or a "protocol error" means that something went wrong in the back end; the back end
has simply closed the connection.

You should find the reason for the short read in the log of the back end.


Regards,
Jost Boekemeier



      dddd

Hi,

the ISAPI requires a running IIS webserver, right?

Why don't you install PHP into IIS and then use the following code:

 require_once("http://localhost:8080/JavaBridge/java/Java.inc");

To connect the PHP instances running in your IIS server with the tomcat J2EE back end?


Regards,
Jost Boekemeier



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Hi,

[eval calls itself until a stack overflow occurs]
> Exception in thread "main" java.lang.StackOverflowError

I think version 4.2.0 have had such a problem. I could not reproduce this in version 4.2.1, but
this may well be a problem due to a change in the JSR223 API.

Which one do you use, the API shipped with the bridge or some other API?


Regards,
Jost Boekemeier



      dddd

Hello,

I'm currently using the PHP javabridge to use lucene together with PHP5.
I developed our application and everything looked fine. Some stress test
pointed me in the direction to use Tomcat as a servlet engine. we had an
4time speed increase after that. Everything looked fine till it went in
production.
The setup Tomcat and Apache started acting weird. Sometimes the code throws
this error while other javabridge parts of the page work:
Fatal error: php_mod_java(98): Call object is null: The connection to the
current back end doesn't exist anymore; probably the current back end has
been restarted w/o restarting the front end.
the problem is basically that the production server is not stable. If anyone
has a suggestion how to make this setup reliable and have some suggestions
to tune apache/tomcat/javabridge/lucene?

Greets,

Gilbert

Hi Jost!

As you suggested, I opened a ticket and appended the detailed PHP-Java Bridge log (level = 5) at the end of that ticket.  I also included additional information (e.g. my environment and the way I use PHP-Java Bridge code) in there.

http://sourceforge.net/tracker/?func=add&group_id=117793&atid=679233

I hope you can help me find out why my code executes very slowly, and get ideas on optimizing PHP-Java Bridge code usage.

Thank you very much!

Regards,

Filip


 Send instant messages to your online friends http://uk.messenger.yahoo.com 

an update on the fread() errors below: 
It started failing on the following computer

http://192.168.0.5:8080/JavaBridge/test.php

after I'd changed a webpage that I've been developing (that makes use of the bridge) and clicked refresh.  Thus, it must not have to do with which computer is used.

I found that deleting cookies makes it work again for some reason, so the problem must have something to do with cookies or the cache.  Does the java bridge use cookies?  if so, can it be configured not to?

--Nathan Shaskin
Compliance Publishing

php...@li... wrote: Background:
JavaBridge version is 4.1.7_j2ee
I'm using Tomcat 6.0 (running as a service) as the JVM.
Java version is 1.6.0_02
I'm running IIS (needs to work on both v5.1 and v6.0, which are running on Windows XP pro and Windows Server 2003 respectively)
PHP is version 5.2.3 and is running as an ISAPI
php directory is C:/PHP5

I want to run the javaBridge's pure php implementation
I do not want to run php as a CGI, but rather use my already running ISAPI php

When I first place the javaBridge.war file in Tomcat's webapps directory, it works fine regardless of which machine I used to access 
http://localhost:8080/JavaBridge/test.php

However it does use CGI/FastCGI version of php (5.2.1) which is obviously not the ISAPI php instance I want it to use.  It does list C:PHP5\php.ini as the php.ini file that was loaded, so it must be finding the php folder.

Also, when I restart the computer, a request to http://localhost:8080/JavaBridge/test.php
from the localhost will fail with

Warning: fread() [function.fread]: Length parameter must be greater than 0 in C:\Inetpub\wwwroot\JavaBridge\java\Java.inc on line 884
protocol error. , Invalid document end at col 1

However, if I go to the same page from a different computer
for instance: 
http://192.168.0.5:8080/JavaBridge/test.php
the test completes successfully

So, I have two questions, how can I configure the bridge to use my ISAPI php instance, and why can I only run java from a computer that's not the server?

Thank you for your time.

--Nathan Shaskin
Compliance Publishing

       
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Background:
JavaBridge version is 4.1.7_j2ee
I'm using Tomcat 6.0 (running as a service) as the JVM.
Java version is 1.6.0_02
I'm running IIS (needs to work on both v5.1 and v6.0, which are running on Windows XP pro and Windows Server 2003 respectively)
PHP is version 5.2.3 and is running as an ISAPI
php directory is C:/PHP5

I want to run the javaBridge's pure php implementation
I do not want to run php as a CGI, but rather use my already running ISAPI php

When I first place the javaBridge.war file in Tomcat's webapps directory, it works fine regardless of which machine I used to access 
http://localhost:8080/JavaBridge/test.php

However it does use CGI/FastCGI version of php (5.2.1) which is obviously not the ISAPI php instance I want it to use.  It does list C:PHP5\php.ini as the php.ini file that was loaded, so it must be finding the php folder.

Also, when I restart the computer, a request to http://localhost:8080/JavaBridge/test.php
from the localhost will fail with

Warning: fread() [function.fread]: Length parameter must be greater than 0 in C:\Inetpub\wwwroot\JavaBridge\java\Java.inc on line 884
protocol error. , Invalid document end at col 1

However, if I go to the same page from a different computer
for instance: 
http://192.168.0.5:8080/JavaBridge/test.php
the test completes successfully

So, I have two questions, how can I configure the bridge to use my ISAPI php instance, and why can I only run java from a computer that's not the server?

Thank you for your time.

--Nathan Shaskin
Compliance Publishing

       
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I am trying to call a simple php function in java (see below) and i get the error shown. Any suggestions

package test;

import java.io.IOException;

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class cli {
   /**
    * @param args
    * @throws IOException
    * @throws ScriptException
    */
   public static void main (String[] args) throws IOException, ScriptException {
      String l = "5";
      System.setProperty ("php.java.bridge.default_log_level", l);
      System.setProperty ("php.java.bridge.default_log_file", "");
      System.setProperty ("php.java.bridge.php_exec", "/usr/local/php5/bin/php");
      ScriptEngine eng = (new ScriptEngineManager ()).getEngineByName ("php-interactive");
      System.out.println (eng.eval ("$a=122"));
      System.out.println (eng.eval ("$a=$a+1;"));
      System.out.println (eng.eval ("echo $a;"));
      eng.eval ((String)null);
   }
}

=============================================================
see the error
=============================================================
Aug 01 08:17:51 JavaBridge DEBUG: contextfactory: new context: 1@ for web context, # of contexts: 1
Aug 01 08:17:51 JavaBridge DEBUG: created new bridge: php.java.bridge.JavaBridge@706da8
Aug 01 08:17:51 JavaBridge DEBUG: Using php binary: [/usr/local/php5/bin/php]
Aug 01 08:17:51 JavaBridge DEBUG: Started [/usr/local/php5/bin/php, -d, allow_url_include=On]
Aug 01 08:17:51 JavaBridge DEBUG: Socket connection accepted
Aug 01 08:17:51 JavaBridge DEBUG: Starting HTTP server thread from thread pool
Aug 01 08:17:51 JavaBridge DEBUG: 706da8@73eca6 --> <I v="0" m="getContext" p="I" i="1baa7fc" >
Aug 01 08:17:51 JavaBridge DEBUG: 706da8@73eca6 --> </I>
Aug 01 08:17:51 JavaBridge DEBUG: 
Invoking [Object 7368104 - Class: php.java.bridge.JavaBridge:ID4712040:LOADER-ID3343727].getContext();

Aug 01 08:17:51 JavaBridge DEBUG: 
Result [Object 1253877 - Class: php.java.script.PhpScriptContext:ID1729816:LOADER-ID3343727]

Aug 01 08:17:51 JavaBridge DEBUG: 706da8@73eca6  <-- <O v="1" p="O" i="1baa7fc"/>
Aug 01 08:17:51 JavaBridge DEBUG: 706da8@73eca6 re-directing to port# Pipe:/var/tmp//.php_java_bridgeo2Yypi/php_rz2B0f
Aug 01 08:17:51 JavaBridge DEBUG: 706da8@73eca6 waiting for context: 1@
Aug 01 08:17:51 JavaBridge DEBUG: end (thread returned to pool): Thread[JavaBridgeHttpServerThreadPool#1,5,JavaBridgeHttpServerThreadPool#1]
Aug 01 08:17:51 JavaBridge DEBUG: starting a new ContextRunner php.java.bridge.http.ContextRunner@1bd9c9
Aug 01 08:17:51 JavaBridge ERROR: An exception occured: java.io.IOException: Protocol violation
java.io.IOException: Protocol violation
        at php.java.bridge.http.ContextRunner.init(ContextRunner.java:116)
        at php.java.bridge.http.ContextRunner.run(ContextRunner.java:139)
        at php.java.bridge.BaseThreadPool$Delegate.run(BaseThreadPool.java:58)
Aug 01 08:17:51 JavaBridge DEBUG: end (thread returned to pool): Thread[JavaBridgeContextRunner#1,5,JavaBridgeContextRunner#1]
Exception in thread "main" java.lang.StackOverflowError
Java Result: 1


any help will be appreciated

Hi,

> Just one more question. After staring JavaBridge on given port, do i need to
> start it again manualy

No. Please see the FAQ.html contained in the download folder. 


Regards,
Jost Boekemeier



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thanks Jost, now everything is working just fine,
Just one more question. After staring JavaBridge on given port, do i need to
start it again manualy
after restrating my system, or it will restart on its own (runing as a
service)? If former is the case, is
there a posibility to start JavaBridge as a service and initalize it to
start listening always on specific port?

mladen

On 31/07/07, php...@li... <
php...@li...> wrote:
>
> Hi,
>
> > [error] [client 127.0.0.1] PHP Fatal error:  Cannot redeclare
> > java_last_exception_get() in
> > http://localhost:8101/JavaBridge/java/Java.incon line 1431
>
> there's another extension which already exports this function. This is
> probably the old
> ext/java extension shipped with PHP, you can remove it.
>
>
> Regards,
> Jost Boekemeier
>
>
>
>       __________________________________  Die etwas anderen Infos rund um
> das Thema Reisen. BE A BETTER WELTENBUMMLER!  www.yahoo.de/clever
>
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> Still grepping through log files to find problems?  Stop.
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> _______________________________________________
> php-java-bridge-users mailing list
> php...@li...
> https://lists.sourceforge.net/lists/listinfo/php-java-bridge-users
>

Hi,

> [error] [client 127.0.0.1] PHP Fatal error:  Cannot redeclare
> java_last_exception_get() in
> http://localhost:8101/JavaBridge/java/Java.incon line 1431

there's another extension which already exports this function. This is probably the old
ext/java extension shipped with PHP, you can remove it.


Regards,
Jost Boekemeier



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Hi, i'm new to php-java bridge and having problem to install php-java bridge
on my Windows XP system.
Here is what i'm using.

* Apache Web Server 2.2.3
* PHP 5.2.3
* php/Java Bridge 4.2.1
* java 1.6

I tried several proposals on how to install javabridge, but still not having
any success.
When starting test.php, and after that reading result.html, everythting
seams ok. But, starting
my test.php  page from apache/htdocs:

<?php
require_once("http://localhost:8082/JavaBridge/java/Java.inc");
$s = new Java("java.lang.String", "hello");
echo $s;
?>

i get error message in my error.log:

[error] [client 127.0.0.1] PHP Fatal error:  Cannot redeclare
java_last_exception_get() in
http://localhost:8101/JavaBridge/java/Java.incon line 1431

I'm not sure where i'm getting wrong. So can someone pleas send me link with
some description on how to
configure my php.ini file so things can go working.

thanks

mladen

Hello,

i tried to integrate an php cms system (typo3) in our java webapp. The 
intention is every request from php cms system forward to the java web 
app, that we can track every paramater from the request. (Or first all 
requests to our java web app and the back to the cms-system)

Nothing i do it is successfully. We need an professional-consultand they 
have the skill to integrate this szenario and join for this task in our 
project. (performance-related 
<ende?lp=ende&p=eL4jU.&search=performance-related> pay 
<ende?lp=ende&p=eL4jU.&search=pay>) I prefere german speak consultant.

Is there everybody they can help?

Regards Jörg

Hi Jörg,

> >>[delete the] php.ini in the cgi folder. The same behavior. 
> >have you restarted tomcat?
> i restarted the machine.

Then you need to find out why your system PHP still loads the wrong php.ini. Please use our bug
tracker, if you need assistence. =>
http://sourceforge.net/tracker/?func=add&group_id=117793&atid=679233


> 3. Copy java-x86-windows.dll from the JavaBridge.war to C:\PHP\ext
> 4: Rename java-x86-windows.dll (from C:\PHP\ext) to php_java.dll
> 
> Is this docu not correct?

No. The relevant 4.x documentation is contained in the download archive.


> (linked from the http://php-java-bridge.sourceforge.net/pjb/examples.php 
> site)

This documentation describes the latest stable version, which is version 3.2.1.


Regards,
Jost Boekemeier



      dddd

Hi Jost,

>>[delete the] php.ini in the cgi folder. The same behavior. 
>>    
>>
>
>have you restarted tomcat?
>
>  
>
i restarted the machine.

>  
>
>>Then i upgrade the bridge 
>>from 3.2.1a to 4.2.1. But unfortunately i cant find the 
>>java-x86-windows.dll for copy into the php/ext folder.
>>    
>>
>
>You don't need a dll. The PHP/Java Bridge is written in pure PHP and pure Java. 
>Please see the README for details.
>  
>
i read this i the documentation:
http://www.dsl.uow.edu.au/~sk33/php5jsp.htm
PHP 5 & Java Bridge
3. Copy java-x86-windows.dll from the JavaBridge.war to C:\PHP\ext
4: Rename java-x86-windows.dll (from C:\PHP\ext) to php_java.dll

Is this docu not correct?

(linked from the http://php-java-bridge.sourceforge.net/pjb/examples.php 
site)

regards Jörg