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

Hi,

as a workaround please do not use the java.so.

Please use the pure Java implementation and "Java.inc" instead. It is about 30% faster if
the PHP accelerator is enabled.

Can you please open a problem report (please use
http://sourceforge.net/tracker/?func=add&group_id=117793&atid=679233)? Please attach a test case
which allows us to reproduce this problem with the java.so.


BTW: Andre, what about removing the C code "java.so" entirely?


Regards,
Jost Boekemeier



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Hi,

after some upgrades on my server I've run into problem with
php-java-bridge.

When java bridge is in use, many connections are becoming stuck in state
"Closing connection" state (determined via apache server-status)
This appears only under heavy load.

Environment:
Gentoo linux
Apache tested 2.0.58-r2, 2.0.59-r5, 2.2.6
PHP 5.2.4_p20070914-r2
JavaBridge 4.0.1 4.3.0
JRE Sun 1.5.0_13

Steps to reproduce:
Install apache, php, javabridge. Simple configuration for JavaBridge:

# cat /etc/php/apache2-php5/ext-active/java.ini 
extension=java.so
[java]
java.log_level="50"
java.log_file="/tmp/php-java-bridge.log"

I have running keepalived against server for server failure detection
(about 1req/s) +
I run 
ab2 -c 50 -n 100000 http://172.31.32.40/keepalived/status.htm
to generate some load.

When JavaBridge is disabled (remove extension=java.so) everything works
fine. But when I turn JavaBridge on, many connections are becoming
stalled in state "Closing connection":

   Server uptime: 12 minutes 53 seconds
   Total accesses: 102628 - Total Traffic: 23.7 MB
   CPU Usage: u14.24 s10.53 cu0 cs0 - 3.2% CPU load
   133 requests/sec - 31.4 kB/second - 241 B/request
   60 requests currently being processed, 9 idle workers

CCCCCCCCCCCCCCC_CCCC_CCCCCCC_C_CCCCC_CCCCCCCCCCCCC_CC__CCCCCCC_W
CCCCC...........................................................
................................................................
................................................................

   Scoreboard Key:
   "_" Waiting for Connection, "S" Starting up, "R" Reading Request,
   "W" Sending Reply, "K" Keepalive (read), "D" DNS Lookup,
   "C" Closing connection, "L" Logging, "G" Gracefully finishing,
   "I" Idle cleanup of worker, "." Open slot with no current process

Really strange is that I'm performing these tests on STATIC html file.
Thus PHP or JavaBridge should not be involved
Only thing what came onto my mind was JavaBridge has small thread pool.
I've increased thread pool value from default 20 up to 200. Same effect.

JavaBridge log:

# cat /tmp/php-java-bridge.log 
Oct 26 15:26:10 VMBridge INFO : VM                  :
1.5.0_13@http://java.sun.com/
Oct 26 15:26:10 VMBridge INFO : VMBridge version             : 4.3.0    
Oct 26 15:26:10 VMBridge INFO :
logFile             : /tmp/php-java-bridge.log
Oct 26 15:26:10 VMBridge INFO : default logLevel    : 50
Oct 26 15:26:10 VMBridge INFO : socket              : INET_LOCAL:9267
Oct 26 15:26:10 VMBridge INFO :
java.ext.dirs       : /opt/sun-jdk-1.5.0.13/jre/lib/ext
Oct 26 15:26:10 VMBridge INFO :
php.java.bridge.base: /usr/lib64/php5/lib/php/extensions/no-debug-non-zts-20060613
Oct 26 15:26:10 VMBridge INFO : extra library
dir   : /usr/lib64/php5/lib/php/extensions/no-debug-non-zts-20060613/lib
Oct 26 15:26:10 VMBridge INFO : thread pool size    : 200
Oct 26 15:26:10 VMBridge DEBUG: Starting to accept Socket connections

What do you think? Is there anything I can try? Is this a bug? Feature?
Or design philosophy?

Thank you for your answers.

Best regards,

-- 
Martin Filip
e-mail: ne...@sm...
jabber: ne...@sm...
www: http://www.smoula.net

 _________________________________________ 
< BOFH Excuse #7: poor power conditioning >
 ----------------------------------------- 
       \   ,__,
        \  (oo)____
           (__)    )\
              ||--|| *

Hi Jon,

just copy Java.inc to the PHP include path. 

You may need to adjust the JAVA_HOSTS variable, if you don't run the Java VM on localhost:8080.


Regards,
Jost Boekemeier



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Any way we can deploy the Java Bridge without enabling PHP's
allow_url_include option?

Thanks,
Jon Abbett

Hi,

> var_dump($logger->debug('aa')) and no result ...

the log4j logger supports various logging mechanism. 

If you start the log4j viewer "Chainsaw", you should see your log output there.

It is also possible to log into a temporary memory buffer and then print that
buffer using PHP's echo command.


Regards,
Jost Boekemeier



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Hi,

if you don't have the standard PHP library, use:

java_require('E:/apache-log4j-1.2.15/log4j-1.2.15.jar');

java("org.apache.log4j.BasicConfigurator")->configure();
$logger = java("org.apache.log4j.Logger")->getLogger();

$logger->debug(...);
$logger->info(...);


Regards,
Jost Boekemeier


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9aPso/Sj8yCjugpwcm90b2NvbCBlcnJvcjogLCBJbnZhbGlkIGRvY3VtZW50IGVuZCBhdCBjb2wg
NC4gQ2hlY2sgdGhlIGJhY2sgZW5kIGxvZyBmb3IKZGV0YWlscy4K

Hi,

in version 4.3 or above:


<?php require_once("java/Java.inc");

java_autoload ("log4j.jar");

static function getLogger ()
{
  static $logger = null;

  if (!$logger) $logger = org_apache_log4j_Logger->getLogger();
  return $logger;
}

org_apache_log4j_BasicConfigurator->configure();
getLogger()->debug("bleh");
getLogger()->info("foo");

?>

In PHP version 5.1 or below you need to use the Java() function and the new Java() constructor
instead of java_autoload().


Regards,
Jost Boekemeier



      Machen Sie Yahoo! zu Ihrer Startseite. Los geht's: 
http://de.yahoo.com/set

>
>     import org.apache.log4j.Logger;
>     import org.apache.log4j.BasicConfigurator;
>
>     public class Hello {
>
>       private static final Logger logger = Logger.getLogger(Hello.class);
>
>       public
>       static
>       void main(String argv[]) {
>      BasicConfigurator.configure();
>      logger.debug("Hello world.");
>      logger.info("What a beatiful day.");
>       }
>     }



i just wanna how to write php code by using Jb

-- 
regards
jl

Hi,

> class I get a "No such mehtod" exceptions on very simple methods. 

You can use

 echo java_inspect ($javaObject);

to list the public methods.

>         public String report() {
>         $model = new JavaClass("py.model.Collapse");
>         echo (String) $model->report();

> PHP Fatal error:  Uncaught [o(Exception):"java.lang.Exception: Invoke 
> failed: [c(Collapse)]->report. Cause: java.lang.NoSuchMethodException: 
> report().

It's a misunderstanding. Unlike other languages which have a meta object protocol the Java
language doesn't allow methods for classes (the so called "class methods" are only procedures
bound to that type, you can't override them).


 
> Looks like almost exactly the same code in both cases.   It looks like 

No, it is a misunderstanding.  The procedure java("typeName") returns a type, while new
Java("typeName") returns an instance. The new JavaClass("typeName") is the low-level interface
used by the java() procedure.
 
> Any suggestion would be greatly appreciated.  .

Use 

  java("typeName")->staticProcedureName() 

to call Java procedures belonging to "typeName". Use 

  $obj = new Java("typeName");
  $obj->methodName()

to call methods.


Regards,
Jost Boekemeier



       __________________________________  Ihre erste Baustelle? Wissenswertes für Bastler und Hobby Handwerker. www.yahoo.de/clever

When I run  a modified version of the Sales Tax example from the 
tutorial from the DSL lab  at the University of Woolengong it works 
fine.  But when I use the same code pattern for another more complex 
class I get a "No such mehtod" exceptions on very simple methods. 

I put the following test method into the class just to see if it would work:

        public String report() {
         
            String out ="collapse is here!";
             return out;
        }


I used the following PHP statements to call this method.


        java_require("c:\jarFactory\model1.8.jar");
        
        echo "require done <br/>";

        $model = new JavaClass("py.model.Collapse");
        
        echo (String) $model->report();

An error message was returned from the last statement that contained the 
following:

PHP Fatal error:  Uncaught [o(Exception):"java.lang.Exception: Invoke 
failed: [c(Collapse)]->report. Cause: java.lang.NoSuchMethodException: 
report().


I added the method to the SalesTax class and the following code worked fine:

    java_require('c:\jarFactory\test1.2.jar');

    $salesTax = new Java("py.test.SalesTax");
   
    echo (String) $salesTax->report();

Looks like almost exactly the same code in both cases.   It looks like 
the bridge was able to find my Collapse class but not the report() 
method,  or any other method,  but the same code successfully calls  the 
report() method when it is added it to the SalesTax class. 

There has to be some difference in the jar files or the class structure 
that is causing the error. When I use a java main() to create and access 
my Collapse class everything in it works.  The bridge does not complain 
about not being able to find the jar file or the class.   There is only 
one copy of model1.8 jar on my machine, and when I look at it in the 
Eclipse package explorer the report() method is there.  I don't know 
where to look next to solve this problem.

Any suggestion would be greatly appreciated.  .

I am using Apache 2.0.61, PHP 5.1.6 and the 3.2.1a bridge on XP HOME SP2.

Thanks,

Bob Newsome