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

Hi again !

I sent my email too early in the debug process... I found the problem: I
supposed that the jdbc classes were in the jdk jar files, but they aren't.
The log file was saying something like:

Aug 31 08:10:16 JavaBridge INFO : try to load class com.mysql.jdbc.Driver
Class loading error
[...]

Thanks for your tips!
Francis


-----Original Message-----
From: Kai Londenberg [mailto:K.L...@li...]
Subject: Re: [Php-java-bridge-users] jdbc and the bridge

>Hi everyone,
>
>I am using the java-bridge for about 3 months now and it has been very
stable, but yesterday I ran in to something really strange.
>
>In my java files, I create a  java.sql.DriverManager  object and I play
with it.
>If I use this object with the java-bridge, it does not complain about
anything, but nothing happens in the DB.
>
>Any Idea about what's happening?
>Thanks,

Can you give an example, or better yet a test case which shows the
problems ?

Which version of the php java bridge do you use ? If it's not the
latest version, try to update and then check if the problem still
occurs.

Also, If you can't create a test case outside of your development
environment or don't have time for that - try to find out where the
problem occurs - if the Java code gets called at all, if an exception
occurs.

Put the log level of the php-java bridge to 4 or higher and then look
at the log whether any problem is reported.

On Tue, 30 Aug 2005 15:01:25 -0500, you wrote:

>Hi everyone,
>
>I am using the java-bridge for about 3 months now and it has been very =
stable, but yesterday I ran in to something really strange.
>
>In my java files, I create a  java.sql.DriverManager  object and I play =
with it.
>If I use this object with the java-bridge, it does not complain about =
anything, but nothing happens in the DB.
>
>Any Idea about what's happening?
>Thanks,

Can you give an example, or better yet a test case which shows the
problems ?

Which version of the php java bridge do you use ? If it's not the
latest version, try to update and then check if the problem still
occurs.

Also, If you can't create a test case outside of your development
environment or don't have time for that - try to find out where the
problem occurs - if the Java code gets called at all, if an exception
occurs.

Put the log level of the php-java bridge to 4 or higher and then look
at the log whether any problem is reported.

with best regards,

	Kai Londenberg

-------------------------------
librics GmbH & Co. KG
G=F6ttinger Chaussee 115
D-30459 Hannover
Tel. +49 511 - 473 88 77
=46ax +49 511 - 473 88 78
mailto: K.L...@li...

Hi everyone,

I am using the java-bridge for about 3 months now and it has been very stable, but yesterday I ran in to something really strange.

In my java files, I create a  java.sql.DriverManager  object and I play with it.
If I use this object with the java-bridge, it does not complain about anything, but nothing happens in the DB.

Any Idea about what's happening?
Thanks,

Francis Leblanc
Ericsson Montreal

Hi Jonathan,

--- "Abbett, Jonathan"
<Jon...@ch...> schrieb:

> The Java sessions I create with java_get_session
> seem to disappear
> awfully quickly.

the default value is (or should be) 1400 seconds.  It
can be changed with:

$session=java_get_session(..)
$session->setTimeout(timeout_in_seconds);


How fast does the session expire? We've had a bug in
2.0.6 where we passed 1400, but interpreted it as
milliseconds. 


Regards,
Jost Boekemeier



	

	
		
___________________________________________________________ 
Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de

The Java sessions I create with java_get_session seem to disappear
awfully quickly.  How do I set a bigger maximum age for my session store
(i.e. 20 minutes)?

Thanks,
Jon


=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Jonathan Abbett
Children's Hospital Informatics Program
1 Autumn Street, Fifth Floor
Boston, MA 02215
617-355-8334
jon...@ch...
http://www.chip.org

Hi Jonathan,

> php_mod_java(59): Synchronization problem, rinit
> with active connection called.

thank you very much for this problem report. Now
suddenly PR1202896 ("session still open in rinit")
makes sense.

The basic problem is the same that Bryan has reported,
please see:

http://sourceforge.net/mailarchive/forum.php?thread_id=7884155&forum_id=42415)

Kai has already explained what what __sleep() means
and how to store java objects.

During client/server communication both the client and
the server build a dictionary of (handle . object)
pairs. When you serialize/deserialize a handle without
restoring its server-side meaning the server and
client suddenly use different dictionaries and very
strange things may happen; it is like switching the
language in the middle of a conversiation. In a
sentence like "hier is gift", the server should better
know that "gift" means "poison", otherwise it will get
into trouble when the client asks to handle() it.

Please use $session=java_get_session(<name>) to store
java values.


Okay, now how to handle the problem?  We could
implement the __sleep() and __wakeup() methods and
abort script execution if they are called. But I think
it shouldn't be too diffcult to implement them
correctly: All we need is to move the pair from the
globalRef into the session ref when _sleep() is
called. __wakeup() is a little bit more complicated
because we restore an object which has the old
(client-side view) of the object identity and we
receive an object from the session ref which has the
correct identity.  We must "patch" the restored object
to contain the correct id and then discard the
received object.

I have created a ticket for this: PR1274526.

In the meantime please use java_get_session() to store
your java values.


Regards,
Jost Boekemeier




	

	
		
___________________________________________________________ 
Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de

I'm seeing a bunch of strange stuff in my log files, not sure what to =
make of it.
=20
In my php_errors log file, right when I restart Apache:
=20
[26-Aug-2005 08:52:27] PHP Notice:  php_mod_java(57): waiting for server =
another 14 seconds in Unknown on line 0
=20
=20
In my Apache error log, after I visit a page:
=20
[client 10.1.150.118] PHP Fatal error:  Exception thrown without a stack =
frame in Unknown on line 0
[client 10.1.150.118] PHP Fatal error:  php_mod_java(59): =
Synchronization problem, rinit with active connection called. Cannot =
continue, aborting now. Please report this to: =
php...@li... =
<mailto:php...@li...>  in Unknown on line =
0, referer: http://ajax.ping.chip.org/viewer.php =
<http://ajax.ping.chip.org/viewer.php>=20

=20
=20
I'm seeing this in my php-java-bridge.log file:
=20
java.lang.NoSuchMethodException: __sleep(). Candidates: []
        at php.java.bridge.JavaBridge.Invoke(JavaBridge.java:966)
        at php.java.bridge.Request.handleRequests(Request.java:190)
        at php.java.bridge.JavaBridge.run(JavaBridge.java:142)
        at php.java.bridge.ThreadPool$Delegate.run(ThreadPool.java:20)

It looks like the php-java-bridge log error happens the first time I run =
a particular page, then the "exception thrown without a stack frame," =
etc. occurs when I try to rerun the page.  At this point, my PHP pages =
will stop responding until I restart Apache.
=20
=20
The code snippet that's (probably) causing the problem:
=20
 GLOBAL $doctypes;
=20
 try
 {
  $pac =3D getPingActionClient();
  $headersResult =3D $pac->readDocumentHeaders(getSessionVar('ticket'), =
getSessionVar('username'), null);
  $documentHeaders =3D $headersResult->getDocumentHeader();
 }
 catch (Exception $e)
 {
  log_write("[getDocumentHeaders] ERROR: $e");
  log_write("[getDocumentHeaders] Returning null...");
 }
=20
 $menu =3D '';
 $buildlist =3D array();
 $iter =3D $documentHeaders->iterator();
=20
 while ($iter->hasNext())
 {
  $header =3D $iter->next();
  $docClass =3D $header->getDocumentClassification();
  $urn =3D $docClass->getClassification();
  if (isset($doctypes[$urn]) && !in_array($urn, $buildlist))
  {
   $buildlist[] =3D $urn;
   $menu .=3D createMenuItem($doctypes[$urn]['display_name'], =
$doctypes[$urn]['menu_url']) . "/n";
  }
 }
=20
It gets a list of "Document Headers," then iterates over them.  Not too =
complex. I'm using PHP5 with Apache2: full info at  =
http://ajax.ping.chip.org/info.php <http://ajax.ping.chip.org/info.php>=20
=20
I'm happy to provide more information, just ask.  Any and all help is =
most appreciated.
=20
Thanks,
Jon Abbett
jon...@ch...

Hi,

Jost Boekemeier schrieb:
> Hi,
> 
> a preview version of 2.0.8 is available for download:
[...]
> (The above download is for windows only, on Linux/Unix
> please download the code directly from the CVS
> repository: cvs -z3
> -d:pserver:ano...@cv...:/cvsroot/php-java-bridge
> co php-java-bridge)

OK this is first time I managed to get the .war successful deployed in
tomcat4. ;)


I just noticed one strange thing in handling the null-object:

--------- test.php5/instanceof.php ---------
If using *mod_php in apache* (using a browser and point it to
tests.php5/instanceof.php) while connecting either via
java_socketname=/var/run/.php-java-bridge_socket
or via
java_server=on

$list->add(null) has problems:

Fatal error: Uncaught [o:"java.lang.Exception: Invoke failed: [o:"[0,
one]"]->add((java.lang.Object)o:"null"). Cause:
java.lang.NullPointerException"] thrown in
/var/www/lokal/test/php-java-bridge/tests.php5/instanceof.php on line 16

php5-cli does not have this problem for some reason.

almost same thing seems to apply to
------ examples/php+jsp/oops.php -----
But this one *neither php5-cli or mod_php* like:
error: Uncaught [o:"java.lang.Exception: CreateInstance failed: new
java.lang.String(([B)o:"null"). Cause: java.lang.NullPointerException"]
thrown in /var/www/lokal/test/php-java-bridge/examples/php+jsp/oops.php
on line 6

first one seems kind of strange to me...

FYI I am using php5.0.4

Cheers,
Peter

Hi,

Peter Niederlag schrieb:

[...]
> I think it should be possible to set the compiler-version via EXPORT
> CC=gcc-3.3 but this seems not to work, probably becaus CC is set to gcc
> in the Makefile.

Yes, I am a fool. :-<
Makefile is created by autoconf/configure whatsoever and of course
reflects the the CC,CXX environment vars I do set.

Still I think I haven't noticed this before:
-----------snipp----------------
configure: WARNING: YOUR GCC INSTALLATION IS BROKEN. It tries to link
with the same library for -m32 and -m64 builds. This may result in a
"wrong ELF class" error at runtime. Although you can work around this
bug at runtime by changing the LD_LIBRARY_PATH, we recommend to
re-install the gcc compiler before youcontinue to install the PHP/Java
Bridge.
----------snapp------------------

Everything seems to work now using gcc3-3 and g++-3.3 as the
libs(java,php5) are all compiled with gcc-3.x. Don't know if it would
work with gcc-4.0.

Since I use the 'make CFLAGS="-m32"' now probably I shouldn't have any
problems but still I'd like to know about that message, which sounds
somewhat scaring to me.

Cheers,
Peter

Hi there,

as some of you might know debian is moving the testing/unstable
distribution to a new default compiler(gcc 3.x -> gcc 4).

So far compiling the bridge has always been a pleasure. ;) Yesterday I
updated to gcc 4. Now the bridge complains:

configure: WARNING: YOUR GCC INSTALLATION IS BROKEN. It tries to link
with the same library for -m32 and -m64 builds. This may result in a
"wrong ELF class" error at runtime. Although you can work around this
bug at runtime by changing the LD_LIBRARY_PATH, we recommend to
re-install the gcc compiler before youcontinue to install the PHP/Java
Bridge.

I think it should be possible to set the compiler-version via EXPORT
CC=gcc-3.3 but this seems not to work, probably becaus CC is set to gcc
in the Makefile.

I know this is most likely my fault or a problem with debian, still I
would appreciate if anyone of you got a hint to solve this.

Thx,
Peter

Hi,

a preview version of 2.0.8 is available for download:

http://prdownloads.sourceforge.net/php-java-bridge/php-java-bridge_2.0.8pre3.zip?download

(The above download is for windows only, on Linux/Unix
please download the code directly from the CVS
repository: cvs -z3
-d:pserver:ano...@cv...:/cvsroot/php-java-bridge
co php-java-bridge)

For production systems please use version 2.0.7
instead.

The following features were added:

* JSP, PHP session sharing

* GUI support

* Calling PHP from java, see the examples/XML example.



Changes since 2.0.8pre

* Local channel re-directs work correctly now.  This
means that, when deployed in Apache/Tomcat, Apache/PHP
and the PHP/Java Bridge 2.0.8 deliver content more
than 50 times faster than version 2.0.7 and about 30%
faster than tomcat's own engine via Apache/mod_jk:

time for i in `seq 200`; do wget -o/dev/null
-O/dev/null
http://localhost:8000/JavaBridge/sessionSharing.jsp;
done

real    0m5.971s
user    0m1.090s
sys     0m0.420s

time for i in `seq 200`; do wget -o/dev/null
-O/dev/null
http://localhost:8000/JavaBridge/sessionSharing.php;
done

real    0m4.351s
user    0m1.140s
sys     0m0.530s

(RHEL3, kernel 2.4.21 on a 1.5GHZ amd32, latest
versions of PHP/Java Bridge, Tomcat/mod_jk and Apache.

* On windows: Starting the backend automatically
should work correctly now when the path ends with a
slash.

* The CGI servlet has been rewritten and it delivers
content much faster now.  However, running PHP as a
CGI from tomcat is not recommended.  Please use Apache
and the mod_jk connector instead of connecting tomcat
directly to the internet. This is much faster and more
secure.

* Several other bugfixes, please see changelog.


I will release the above code as 2.0.8 if I don't get
bug reports within the next three weeks.


Regards,
Jost Boekemeier



	
		
___________________________________________________________ 
Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de

Hi,

> The phpinfo() function ran, and displayed this for
> java :
> 
> java support      Enabled
> java bridge       2.0.8pre 
> java.log_level    2 
> java.hosts        127.0.0.1:8080 
> java.servlet      On 
> java command      javaw -Djava.library.path=c:\php5 

It seems that local channel re-directs currently do
not work at all (at least not if there is no security
manager).  A workaround would be to switch it off in
the backend by changing SocketRunner's isAvailable()
to always return false. Or to kill it: telnet to
port#9567 and send a <>, it will close the port
immediately.

It seems that the bug is connected with a recent "fix"
in the OnInitSockname (in java.c), which now ignores
the command to switch it off.  -- When re-directing
from a HTTP tunnel to a local TCP channel, it is
necessary to switch off the local "unix domain"
channel.  Otherwise the bridge tries to use this and
fails.

I think I can fix this tomorrow and update the
download, it will be 2.0.8pre3.

Thank you very much for the bug report!


Regards,
Jost Boekemeier



	
		
___________________________________________________________ 
Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de

I managed to get the tomcat bridge working when running test.bat.
 
However every php script that I run within tomcat fails to find the bridge.

Here is the process that I took

Unzipped php-java-bridge_2.0.8pre.zip into c:\php5
Eited c:\php5\php.ini 

	extension_dir = "c:\php5"
	extension = php_java.dll
	[java]
	#java.socketname
	java.hosts="127.0.0.1:8080"
	java.servlet=On

Deployed JavaBridge.war into tomcat-5.5.9 
Browsed http://localhost/test.php

The phpinfo() function ran, and displayed this for java :

java support      Enabled
java bridge       2.0.8pre 
java.log_level    2 
java.hosts        127.0.0.1:8080 
java.servlet      On 
java command      javaw -Djava.library.path=c:\php5 
                  -Djava.class.path=c:\php5/JavaBridge.jar 
                  -Djava.awt.headless=true 
                  php.java.bridge.JavaBridge 
                  INET_LOCAL:9267 2 "" 
java status       not running 
java server       localhost

And shows this at the bottom :

Fatal error: php_mod_java(52): Could not connect to server: Unknown error --
Have you started the java bridge and set the java.socketname option? in
C:\java\jakarta-tomcat-5.5.9\webapps\JavaBridge\test.php on line 19

I have tried editing JavaBridge/WEB-INF/web.xml to change things like
override_hosts, servlet_log_level to try and get it working.


Any hints ?

Thanks,

Cameron.

Hi,

> installation. Next day, after the restarting of
> windows, I received the
> following error:
> 
> <br />
> 
> <b>Fatal error</b>:  php_mod_java(52): Could not
> connect to server: No error


Please start the backend *before* you start the
web-server.  

How you do this is currently up to you: you could put
a startup script into the autostart folder or you
could use tomcat to start the backend as a service.

(In version 2.0.8 the backend starts automatically if
the PHP/Java Bridge was deployed as an apache module.
But I would not recommend this setup, neither on unix
nor on windows.)

I hope it helps.  If not, please create a bug report.
I will add a service script to start java as a windows
service for version 2.0.9.


Regards,
Jost Boekemeier




	
		
___________________________________________________________ 
Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de

Dear Sir!

=20

I have installed java-bridge for PHP in windows XP. It worked properly =
after
installation. Next day, after the restarting of windows, I received the
following error:

<br />

<b>Fatal error</b>:  php_mod_java(52): Could not connect to server: No =
error
--

Have you started the java bridge and set the java.socketname option? in
<b>C:\AccessPoint\www\temp\javatest.php</b> on line <b>6</b><br />

=20

phpInfo data:

java support  Enabled =20

java bridge  2.0.7 =20

java.hosts  no value =20

java.servlet  Off =20

java status  not running =20

java server  localhost =20

=20

I also tried to run script

java -jar JavaBridge.jar [INET:9267 4 JavaBridge.log].

which I have found in one forum.

All my attempts had no effects :-(

=20

Could you help me with this problem?

=20

---------------------------------------------
Best regards,
Yaroslav Latushkin,
Programmer, HOST Corporate Systems, LLC

=20

phone: +7(343) 216-16-30 ext. 1605
fax: +7(343) 216-16-31
e-mail: Y.L...@ho... <mailto:Y.L...@ho...>=20
icq =B9 119-670-561

=20

Hi,

I could reproduce this problem.  Please see PR1256962
for details
(https://sourceforge.net/tracker/index.php?func=detail&aid=1256962&group_id=117793&atid=679233).

As a workaround please copy your libraries (.jar
files) into the %JAVA_HOME%\jre\lib\ext folder and
re-start the servlet engine after that or please copy
them to the JavaBridge\WEB-INF\lib directory (the
directory already contains the JavaBridge.jar
library).

I have corrected this problem for version 2.0.8,
please see
http://prdownloads.sourceforge.net/php-java-bridge/php-java-bridge_2.0.8pre.zip?download


If you extract the zip file to c:\php5 and then copy
c:\php5\JavaBridge.war into the servlet engine's
webapps folder, you can run the examples via
http://localhost:8080/JavaBridge.  I have just tested
this with tomcat5 (standalone), and it works correctly
now. (The excel example tests the java_require
functionality)


Thank you very much for reporting this bug.

Regards,
Jost Boekemeier



	
		
___________________________________________________________ 
Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de

Hi,

=20

I am new to java so please excuse me if I am asking a stupid question.
My problem is I cannot access my own java class files from php.

=20

My OS is Windows XP I have PHP 5.0.3 running on Apache 2.0.54 with
module mod_jk2.  I have deployed javabridge 2.0.7 under tomcat 5.5.9.,
using the excellent instructions at:

=20

http://mpcon.org/apacheguide/=20

=20

I can use built in classes such as getProperty('java.version') of
'java.lang.System', but the simplest application I can think of returns
the error "ClassNotFoundException: Class HelloPhp not found"

=20

The PHP code:

=20

<?php

java_set_library_path("%CATALINA_HOME%\webapps\JavaBridge\WEB-INF\classe
s\php\java\servlet");

$useless =3D new Java_class('HelloPhp');

$result  =3D$useless->HelloPhp();

echo $result;

?>

=20

The HelloPhp.java class code:

=20

// HelloPHP.java test of JavaBridge

=20

public class HelloPhp

{

        public static String main()

        {

                return "Hello PHP" ;

        }

}

=20

I have tried placing the class HelloPhp.class file in every directory I
can think of, with/without corresponding java_set_library_path('..') but
to no avail.  The class works from a test calling program from the
system prompt, provided the CLASSPATH environmental variable is set.

=20

The reason for thinking the above path is the most likely candidate is I
have noticed that if I restart Tomcat I get once only the error:

=20

"ReferenceClass failed: new HelloPhp. Cause:
java.lang.IllegalArgumentException] thrown" however refreshing the page
reverts to the above "ClassNotFoundException:"

=20

Any help would be much appreciated.

=20

David

=20

Abbett, Jonathan wrote:

>> A method I use returns a "List" of objects.  I, with my developer's
>> omniscience, know that each object in the list is of a particular class.
>> How do I cast my object to that class?

I don't have very much experience with the java bridge, but as far as I
know you don't need to cast java objects in php.



>> The Java code I'm basing this on simply looks like:
>>
>>      List fooList = getFooList();
>>      MyClass foo = (MyClass)fooList.get(0);
>>
>>
>> I'm stumped as to write the PHP analog.


My guess:

	$SomeObject = java('full.package.path.to.SomeObject');
	$fooList = $SomeObject->getFooList();
	$foo = $fooList->get(0);

_Should_ be as simple as that.

I hope I could help,
Thomas

Hi, 

I contacted this list a couple of weeks ago about using php-java-bridge to 
fire Crystal Reports from Drupal. I have the following: 

Crystal Reports jar files
Crystal Reports jsp examples
Drupal Module with jsp examples semi-translated to php 

In general, this project is kicking my ass and my boss so has his heart set 
on being able to fire reports from Drupal that is has authorized me to find 
a paid consultant to get one example working. 

If you are interested in this job please email me credentials and hourly 
rate. 

Alison

A method I use returns a "List" of objects.  I, with my developer's
omniscience, know that each object in the list is of a particular class.
How do I cast my object to that class?

The Java code I'm basing this on simply looks like:

     List fooList =3D getFooList();
     MyClass foo =3D (MyClass)fooList.get(0);


I'm stumped as to write the PHP analog.

Thanks,
Jon


=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Jonathan Abbett
Children's Hospital Informatics Program
1 Autumn Street, Fifth Floor
Boston, MA 02215
617-355-8334
http://www.chip.org

Hi,

this has been implemented in version 2.0.8. A preview
is at
http://prdownloads.sourceforge.net/php-java-bridge/php-java-bridge_2.0.8pre.zip?download

Please see the examples/XML for an example how to call
php code from java.  The trick is to write a java
class which calls your PHP functions. On java level
you can catch the PHP exceptions and decide what to
call next:

interface Proc {
  public void f();
  public void e(Exception e);

  class test {
  public void call (Proc p) {
   try {
    p.f();
   } catch (Exception e) {
    p.e(e);
  }
}
<?php
function f() {
  new java("java.lang.String", null);
  echo "never reached";
}
function e($e) {
  echo "an exception occured on php level: $e";
}

$test=new java('Proc$Test');
$test->call(java_closure());
?>
 

Regards,
Jost Boekemeier



	
		
___________________________________________________________ 
Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de

Hi,

a extermal class is missing, so the bridge was not
able to invoke the constructor, it has returned the
class instead.  You should be able to locate the error
message in the bridge log file.


> So apparantly, as to see in the first line, $dataset
> is indeed on object

Objects are displayed as ...@hashCode, classes as
class:<name>.

But you're right that the message is not clear enough.
I will change the error message for the next version.

Your next question is probably what the
NoClassDefFoundError means, we have an open problem
report for this (it's a problem specific to the sun
platform, other platforms such as ecma335 and gnu java
don't have this problem).

Kai has already addressed one part of the problem with
his dynamic class loader which does not confuse
classes loaded from different url classloaders
anymore. However, the fundamental problem cannot be
fixed by us, this is something that sun must handle.

But it should be easy to avoid the problems if one
obeys the following rules:

* All interconnected classes must be accessible by the
same classloader.  This means that all interconnected
classes must be loaded by the same java_require()
call.  java_require(foo); java_require(bar); does not
work if foo and bar reference each other. This
condition stays the same unless you stop the bridge or
call java_reset(). (Reason is that even if you use
java_require(foo;bar) after that, the loader has
already cached the broken foo and the queries for bar
jump off from there).

* No class may be appear in more than java_require()
statement call within the same php script.


Regards,
Jost Boekemeier



	
		
___________________________________________________________ 
Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de

Hello everybody,

I'm trying to use the excellent jfree project JFreeChart
(http://www.jfree.org/jfreechart/index.php) to generate a few barcharts.

Unfortunately I get an error and don't know whats wrong.

Here's the code I use (as an example, to provoce the error):



<?
java_require("jfreechart-1.0.0-rc1.jar");
$dataset = new Java("org.jfree.data.category.DefaultCategoryDataset");
print $dataset;
print $dataset->hashCode();
?>


This is what I get:

----------------- snip ---------------------------------------------
[class java.lang.String: First][class
org.jfree.data.category.DefaultCategoryDataset: class
org.jfree.data.category.DefaultCategoryDataset]

Fatal error: Uncaught [class java.lang.Exception: java.lang.Exception:
Invoke failed: [class
org.jfree.data.category.DefaultCategoryDataset]->hashCode. Cause:
java.lang.IllegalArgumentException: object is not an instance of
declaring class] thrown in /mnt/data/var/www/localhost/htdocs/java.php
on line 23
----------------- snap ---------------------------------------------

So apparantly, as to see in the first line, $dataset is indeed on object
of the class DefaultCategorySet.
But invoking a method on this object results in an error "object is not
an instance of declaring class".

What's wrong? Is this a bug in the bridge or did I do something wrong?

Thanks
Thomas

Hello everybody,

I'm trying to use the excellent jfree project JFreeChart
(http://www.jfree.org/jfreechart/index.php) to generate a few barcharts.

Unfortunately I get an error and don't know whats wrong.

Here's the code I use (as an example):



<?
java_require("jfreechart-1.0.0-rc1.jar");
$dataset = new Java("org.jfree.data.category.DefaultCategoryDataset");
print $dataset;
print $dataset->hashCode();
?>


This is what I get:

----------------- snip ---------------------------------------------
[class java.lang.String: First][class
org.jfree.data.category.DefaultCategoryDataset: class
org.jfree.data.category.DefaultCategoryDataset]

Fatal error: Uncaught [class java.lang.Exception: java.lang.Exception:
Invoke failed: [class
org.jfree.data.category.DefaultCategoryDataset]->hashCode. Cause:
java.lang.IllegalArgumentException: object is not an instance of
declaring class] thrown in /mnt/data/var/www/localhost/htdocs/java.php
on line 23
----------------- snap ---------------------------------------------

So apparantly, as to see in the first line, $dataset is indeed on object
of the class DefaultCategorySet.
But invoking a method on this object results in an error "object is not
an instance of declaring class".

What's wrong? Is this a bug in the bridge or did I do something wrong?

Thanks
Thomas

Hi Jonathan,

> Is there a PHP 4 alternative to using PHP 5's
> try/catch functionality to catch Java exceptions?

Currently only java_last_exception().

But funny that you mention it, I have just thought
about this while trying to do the opposite: find a way
to signal an exception while running a PHP procedure
invoked from java.


I think there are at least two solutions, we could
either add a primitive to register a "global"
exception handler, something like:

  java_register_exception_handler(php_proc);

or we could add a special primitive
"java_call_with_exception_handler" which wraps the
current invoke, getsetprop or create call and invokes
the handler in case we receive an exception- instead
of an object-handle (the protocol uses E to tag an
exception object).


Regards,
Jost Boekemeier




	

	
		
___________________________________________________________ 
Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de