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

Continuing to investigate on this new Java('...') call that returns a null
I pushed the log-level even higher and I am now getting this log from the
PHP/Java bridge:

-------------------------------------------------
May 04 00:03:44 JavaBridge INFO : JavaBridge version         : 3.1.8
May 04 00:03:44 JavaBridge INFO : JavaBridge logFile         :
C:\temp\php-java-bridge.log
May 04 00:03:44 JavaBridge INFO : JavaBridge default logLevel: 5
May 04 00:03:44 JavaBridge INFO : JavaBridge socket          :
INET_LOCAL:9270
May 04 00:03:44 JavaBridge INFO : JavaBridge thread pool size: 20
May 04 00:03:44 JavaBridge DEBUG: Starting to accept Socket connections
May 04 00:03:46 JavaBridge DEBUG: Socket connection accepted
May 04 00:03:46 JavaBridge DEBUG: Starting bridge from Thread Pool
May 04 00:03:46 JavaBridge DEBUG: 6fee6fee@33563356 START: JavaBridge.run()
May 04 00:03:46 JavaBridge DEBUG: 6fee6fee@33563356 Request from client
with uid/gid -1/-1
May 04 00:03:46 JavaBridge DEBUG: 6fee6fee@33563356 --> <I v="0"
m="updateJarLibraryPath" p="I" i="6be6668" >
May 04 00:03:46 JavaBridge DEBUG: 6fee6fee@33563356 --> <S
v="C:\Programs\xampp\htdocs\demo\lib\nci.jar" />
May 04 00:03:46 JavaBridge DEBUG: 6fee6fee@33563356 --> <S
v="C:\Programs\xampp\php\ext\" />
May 04 00:03:46 JavaBridge DEBUG: 6fee6fee@33563356 --> </I>
May 04 00:03:46 JavaBridge DEBUG:
Invoking [Object 1877897198 - Class:
php.java.bridge.JavaBridge:ID1080574056:LOADER-ID382211784].updateJarLibraryPath([Object
 791555886 - Class: java.lang.String:ID51184397:LOADER-ID0],[Object
876229690 - Class: java.lang.String:ID51184397:LOADER-ID0]);

May 04 00:03:47 JavaBridge DEBUG: Added LOADER-ID1560567044
OrigPath: ;C:\Programs\xampp\htdocs\demo\lib\nci.jar
Translated: file:C:\Programs\xampp\htdocs\demo\lib\nci.jar
May 04 00:03:47 JavaBridge DEBUG:
Result [Object null]

May 04 00:03:47 JavaBridge DEBUG: 6fee6fee@33563356  <-- <N i="6be6668"/>
May 04 00:03:47 JavaBridge DEBUG: 6fee6fee@33563356 --> <C v="demo.NCI"
p="I" i="6be6668" />
May 04 00:03:47 JavaBridge DEBUG: 6fee6fee@33563356 --> </C>
May 04 00:03:47 JavaBridge DEBUG: trying to load class: demo.NCI from:
LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class: java.lang.Object
from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class: org.w3c.dom.Node
from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class: java.lang.String
from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class: java.lang.Throwable
from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class: java.lang.Exception
from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class:
java.lang.reflect.Method from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class:
org.apache.muse.ws.notification.NotificationMessage from:
LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class:
org.apache.muse.util.xml.XmlSerializable from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class:
demo.NCI$UsageException from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class:
java.util.MissingResourceException from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class:
policies.MyServiceProxy from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class:
org.apache.muse.ws.notification.remote.NotificationConsumerClient from:
LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class:
org.apache.muse.ws.resource.remote.WsResourceClient from:
LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class:
org.apache.muse.core.AbstractResourceClient from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class:
org.apache.muse.util.Traceable from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class:
org.apache.muse.ws.addressing.soap.SoapMonitor from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class: policies.MyService
from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class: java.lang.Class
from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class:
java.util.ResourceBundle from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class: demo.NCI from:
LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class: demo.NCI_en from:
LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class: demo.NCI_en_US
from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class:
java.lang.StringBuilder from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class: java.lang.Boolean
from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class: java.lang.System
from: LOADER-ID1560567044
May 04 00:03:47 JavaBridge DEBUG: trying to load class: java.io.PrintStream
from: LOADER-ID1560567044
NCI-ctor()
May 04 00:03:47 JavaBridge DEBUG:
Invoking [Object 1472616390 - Class:
demo.NCI:ID1344884777:LOADER-ID1560567044].demo.NCI();

May 04 00:03:47 JavaBridge DEBUG: 6fee6fee@33563356  <-- <O v="1" p="O"
i="6be6668"/>
May 04 00:03:47 JavaBridge DEBUG: 6fee6fee@33563356 --> <I v="0"
m="castToBoolean" p="I" i="63bf1c4" />
May 04 00:03:47 JavaBridge DEBUG: 6fee6fee@33563356 --> <O v="1" />
May 04 00:03:47 JavaBridge DEBUG: 6fee6fee@33563356 --> </I>
May 04 00:03:47 JavaBridge DEBUG:
Invoking [Object 1877897198 - Class:
php.java.bridge.JavaBridge:ID1080574056:LOADER-ID382211784].castToBoolean([Object
 1472616390 - Class: demo.NCI:ID1344884777:LOADER-ID1560567044]);

May 04 00:03:47 JavaBridge DEBUG:
Result [Object 1472616390 - Class:
demo.NCI:ID1344884777:LOADER-ID1560567044]

May 04 00:03:47 JavaBridge DEBUG: 6fee6fee@33563356  <-- <B v="T"
i="63bf1c4"/>
May 04 00:03:47 JavaBridge DEBUG: 6fee6fee@33563356 --> <U v="1" />
May 04 00:03:47 JavaBridge DEBUG: 6fee6fee@33563356 --> <F p="A" />
May 04 00:03:47 JavaBridge DEBUG: end: Thread[JavaBridge#1,5,JavaBridge#1]
May 04 00:03:47 JavaBridge DEBUG: 6fee6fee@33563356  <-- <F p="A"/>
May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356 --> <I v="0"
m="updateJarLibraryPath" p="I" i="6bdd710" >
May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356 --> <S
v="C:\Programs\xampp\htdocs\demo\lib\nci.jar" />
May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356 --> <S
v="C:\Programs\xampp\php\ext\" />
May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356 --> </I>
May 04 00:05:07 JavaBridge DEBUG:
Invoking [Object 1877897198 - Class:
php.java.bridge.JavaBridge:ID1080574056:LOADER-ID382211784].updateJarLibraryPath([Object
 1595957024 - Class: java.lang.String:ID51184397:LOADER-ID0],[Object
1680630828 - Class: java.lang.String:ID51184397:LOADER-ID0]);

May 04 00:05:07 JavaBridge DEBUG:
Result [Object null]

May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356  <-- <N i="6bdd710"/>
May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356 --> <C v="demo.NCI"
p="I" i="6bdd710" />
May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356 --> </C>
NCI-ctor()
May 04 00:05:07 JavaBridge DEBUG:
Invoking [Object 2059172540 - Class:
demo.NCI:ID1344884777:LOADER-ID1560567044].demo.NCI();

May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356  <-- <O v="1" p="O"
i="6bdd710"/>
May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356 --> <I v="0"
m="castToBoolean" p="I" i="63bf1c4" />
May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356 --> <O v="1" />
May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356 --> </I>
May 04 00:05:07 JavaBridge DEBUG:
Invoking [Object 1877897198 - Class:
php.java.bridge.JavaBridge:ID1080574056:LOADER-ID382211784].castToBoolean([Object
 2059172540 - Class: demo.NCI:ID1344884777:LOADER-ID1560567044]);

May 04 00:05:07 JavaBridge DEBUG:
Result [Object 2059172540 - Class:
demo.NCI:ID1344884777:LOADER-ID1560567044]

May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356  <-- <B v="T"
i="63bf1c4"/>
May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356 --> <U v="1" />
May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356 --> <F p="A" />
May 04 00:05:07 JavaBridge DEBUG: end: Thread[JavaBridge#1,5,JavaBridge#1]
May 04 00:05:07 JavaBridge DEBUG: 6fee6fee@33563356  <-- <F p="A"/>
-------------------------------------------------

The "NCI-ctor()" line (about 20th from bottom) comes from the constructor,
which reads:
      ...
      public NCI() {
            System.out.println("NCI-ctor()");
      }
      ...
and since it's the only thing the constructor does, I would assume that it
also completes.

That means, it is the returning of the object that must fail, or how could
I otherwise get a null back from the constructor?

But the line
...
Result [Object 2059172540 - Class:
demo.NCI:ID1344884777:LOADER-ID1560567044]
...
(seventh line from the bottom) suggests that there actually IS some object
returned, so why does the PHP-code then obtain a null???

Really puzzled!
Michael

php...@li... wrote on 03.05.2007
17:27:58:
> Sorry, but that instruction was to terse for me. How/where exactly do I
set
> that protocol level so that I can monitor what is going on?
> ...

OK - I figured this out myself, how to enable the logging:

The result looks as follows:
------------------------------------------
...
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614 START: JavaBridge.run()
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614 Request from client
with uid/gid -1/-1
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614 --> <I v="0"
m="updateJarLibraryPath" p="I" i="67f0070" >
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614 --> <S
v="C:\Programs\xampp\htdocs\demo\lib\nci.jar" />
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614 --> <S
v="C:\Programs\xampp\php\ext\" />
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614 --> </I>
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614  <-- <N i="67f0070"/>
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614 --> <C v="test.NCI"
p="I" i="67f0070" />
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614 --> </C>
NCI-ctor()
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614  <-- <O v="1" p="O"
i="67f0070"/>
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614 --> <I v="0"
m="castToBoolean" p="I" i="61bf1c4" />
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614 --> <O v="1" />
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614 --> </I>
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614  <-- <B v="T"
i="61bf1c4"/>
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614 --> <U v="1" />
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614 --> <F p="A" />
May 03 17:41:28 JavaBridge DEBUG: 72a872a8@36143614  <-- <F p="A"/>
------------------------------------------

OK - and what exactly does that now tell us???

Michael  (puzzled...)

Sorry, but that instruction was to terse for me. How/where exactly do I set
that protocol level so that I can monitor what is going on?

I am running the PHP/Java bridge 1.3.8 on XAMPP v1.5.4a on a Windows XP box
and I enabled the PHP/Java bridge by placing the files
"WEB-INF\lib\JavaBridge.jar" and "WEB-INF\cgi\java-x86-windows.dll"
(extracted from the file "JavaBridge.war") into C:\Program
Files\xampp\php\ext (the latter under the name "php_java.dll" and adding a
line "extension=php_java.dll" to php.ini). That's at least how I learned to
install and enable the php/java bridge...

Michael


php...@li... wrote on 02.05.2007
11:41:14:

> Hi,
>
> you're right that new Java(...) cannot return NULL.
>
> > How can I figure out, what's going wrong here and
> > why???
>
> You can look at the protocol level. Either set the log
> level to 4 or above or, if you use linux, type:
>
> strace -s 1024 php yourPhpScript.php >error.log
>
> You will see something like:
>
> --> <C p=... v=...>...</C>
> <-- <O v=.../>
>
>
> Which PHP version do you use, btw?
>
>
> Regards,
> Jost Boekemeier

> Which PHP version do you use, btw?

I mentioned that in the very first line of my append: 3.1.8.

Michael :-)


                                                                       =
                                                         
  From:       php...@li...              =
                                                         
                                                                       =
                                                         
  To:         php...@li...              =
                                                         
                                                                       =
                                                         
  Date:       02.05.2007 11:42                                         =
                                                         
                                                                       =
                                                         
  Subject:    Re: [Php-java-bridge-users] Getting back null-object from=
 new     Java(...) - how to debug this?                  
                                                                       =
                                                         





Hi,

you're right that new Java(...) cannot return NULL.

> How can I figure out, what's going wrong here and
> why???

You can look at the protocol level. Either set the log
level to 4 or above or, if you use linux, type:

strace -s 1024 php yourPhpScript.php >error.log

You will see something like:

--> <C p=3D... v=3D...>...</C>
<-- <O v=3D.../>


Which PHP version do you use, btw?


Regards,
Jost Boekemeier



--- php...@li...
schrieb:

>
> I am using php/java bridge 3.1.8. I am having the
> interesting case that in
> my PHP code I do a
>
>       $classpath=3D'...';
>       java_require($classpath);
>       try {
>             $var=3Dnew Java('class.name.here');  //
> the constructor has no
> paramete
>       } catch(JavaException $exeption) {
>             throw new Exception('Java-exception
> creating object of class
> "class.name.here": '.$exeption);
>       }
>       if ($var) {
>             // using the object...
>       } else {
>             echo 'got a null object... :-( ';
>       }
>
> Initially I was getting misc.
> ClassNotFound-Exceptions until I got my
> classpath right. The classpath seems to be OK now,
> but now I am NOT getting
> any JavaException but I get back a null-object, i.e.
> I am falling into the
> echo ... statement in the above snippet.
>
> How can I figure out, what's going wrong here and
> why???
>
> Michael
>
>
>
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Hi,

>   For my application, most of the methods use
> generic as a parameter or

Yes, generics (implemented as erasures) are no problem
for the bridge. Please see our FAQ for details. Real
generics, as proposed by the Rice people (which could
be the base of a proper java module system) need some
adjustment within the bridge code.


> Does the bridge
> support generic systax.

You probably mean "does the bridge support java
generics"? Yes, it does. 

Does it support a generic syntax? No. Java only
supports generics on its surface, the byte code below
is still the same as in java 1.4.

Implementing a syntax transformer (something like
Scheme's define-syntax) for PHP is outside the scope
of the PHP/Java Bridge. 


> Could the syntax be like?
> new java("java.util.List<String>");

The syntax is:

  new java("java.util.List");


Regards,
Jost Boekemeier

--- php...@li...
schrieb:

> Hi
>   For my application, most of the methods use
> generic as a parameter or
> return value (e.g. List<Foo>).  Does the bridge
> support generic systax.
> If it does, could I have a link to the document?
> 
> Could the syntax be like?
> new java("java.util.List<String>");
> 
>
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> get it now.
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> _______________________________________________
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> php...@li...
>
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> 



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Hi
  For my application, most of the methods use generic as a parameter or
return value (e.g. List<Foo>).  Does the bridge support generic systax.
If it does, could I have a link to the document?

Could the syntax be like?
new java("java.util.List<String>");