php-java-bridge-users

[Php-java-bridge-users] bridging from J2SE to PHP possible?

[<php...@li...>]

Hi,

is it possible to instanciate a PHP class from within a J2SE standalone 
application? I couldn't find any information about this on the php-java 
bridge website, it's all about web development.
If not, does somebody know any possibility for this?

regards,
Verena

Re: [Php-java-bridge-users] bridging from J2SE to PHP possible?

[<php...@li...>]

Hi,

> is it possible to instanciate a PHP class from
> within a J2SE standalone 
> application?

Yes, but that's deprecated. If you want to use Java we
recommend to use a J2EE application server or servlet
engine. For example Apache Geronimo or Sun's
"Glassfish".


> I couldn't find any information about
> this on the php-java 
> bridge website, it's all about web development.

Well, PHP is all about web development. IMHO PHP
cannot be used in desktop applications; it has several
limitations. It doesn't support threads and it doesn't
have a real garbage collector. This means that
long-running php applications will consume huge
amounts of memory. The PHP reference counter cannot
reclaim cycles for example.

I know that there are some (IMHO insane) attempts to
create desktop bindings, GTK bindings for example. But
in practice these bindings don't really work well due
to PHP's limitations.

> If not, does somebody know any possibility for this?

An old version (2.0.8) contained some MONO/NET GTK
examples.  


Regards,
Jost Boekemeier




		
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Re: [Php-java-bridge-users] bridging from J2SE to PHP possible?

[<php...@li...>]

Am Montag, 13. November 2006 19:30 schrieb 
> > is it possible to instanciate a PHP class from
> > within a J2SE standalone
> > application?
>
> Yes, but that's deprecated. If you want to use Java we
> recommend to use a J2EE application server or servlet
> engine. For example Apache Geronimo or Sun's
> "Glassfish".
The problem with this solution is that in my opinion J2EE application don't 
scale well to the lower end. And the PHP application is ment for intranet use 
in small networks, so the overhead would be too much.

> Well, PHP is all about web development. IMHO PHP
> cannot be used in desktop applications; it has several
> limitations. It doesn't support threads and it doesn't
> have a real garbage collector. This means that
> long-running php applications will consume huge
> amounts of memory. The PHP reference counter cannot
> reclaim cycles for example.
I share your opinion here, too, maybe I should tell something about the 
background of my question. The PHP app has a strict object orientated design 
and a good separation of business logic, data access and presentation layer. 
We are thinking now about moving away from the web based model to a rich 
client. To speed things up we were hoping to reuse the PHP based business 
logic classes (at least for the first version, if the rich client proves its 
value, we would think about moving to Java completly for the long term). 
Since this actually would be a Java application which uses some PHP classes 
but runs inside the Java VM, the drawbacks of PHP you mentioned shouldn't be 
present in this solution.

> I know that there are some (IMHO insane) attempts to
> create desktop bindings, GTK bindings for example. But
> in practice these bindings don't really work well due
> to PHP's limitations.
I had a look at those things and I share your opinion: not usable.

> > If not, does somebody know any possibility for this?
>
> An old version (2.0.8) contained some MONO/NET GTK
> examples.
I'll have a look at this.

Thanks for your answer,
Verena

Re: [Php-java-bridge-users] bridging from J2SE to PHP possible?

[<php...@li...>]

Hi Verena,

sorry for the misunderstanding. J2SE 1.6.0 will
contain the necessary interfaces.


For example the command:

/opt/jdk1.6/bin/jrunscript -l php-intractive

will start a Java VM with a PHP interpreter attached.


On Linux you need to install java 6 and the
php-java-bridge-devel package:

rpm -i jdk-6-linux-i586.rpm
rpm -i rpm -i php-java-bridge-devel-x.y.z-1.i386.rpm



On Windows or Solaris you need to copy the
JavaBridge.jar and the php-script.jar to the java
extension dir. On Solaris this is
/usr/java/packages/lib/ext/JavaBridge.jar and
/usr/java/packages/lib/ext/php-script.jar

For Java < 1.6.0 you also need the script-api.jar
which is built automatically, if autoconf doesn't
detect Java 6.

The folder
http://php-java-bridge.sourceforge.net/server/test/
contains a few tests.


Regards,
Jost Boekemeier





	
		
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Re: [Php-java-bridge-users] bridging from J2SE to PHP possible?

[<php...@li...>]

Hi Jost,

this sounds great, I'll give it a try.

Regards,
Verena

Re: [Php-java-bridge-users] bridging from J2SE to PHP possible?

[<php...@li...>]

Am Dienstag, 14. November 2006 19:30 schrieb 
php...@li...:
> For example the command:
>
> /opt/jdk1.6/bin/jrunscript -l php-intractive

OK, what I did:
 - compiling the php-java-bridge source on my Suse Linux 10.1 x64 box from the 
tar.bz2 file. The used JDK was SUN JDK 1.5.0_x. 
- downloading Java 1.6.0 RC from SUNs website and installed the rpm 
- copied JavaBridge.jar php-script.jar script-api.jar to the JRE 6 extension 
dir
- started /usr/java/jdk1.6.0/bin/jrunscript -l php-interactive
Now I got a php-interactive> command prompt.
Now I tried things like 
echo "test";
with and without the ;, with <? or <?php and so on, but always I got:
php-interactive> echo "2";
script error: Could not evaluate script

Is the problem that I compiled the bridge with a JDK 1.5 instead of 1.6? I 
tried 1.6 but there were some errors. If this might be the problem I'll post 
the compile errors here.

I tried jrunscript with JavaScript as scripting language and this worked, so I 
guess the JDK is ok.

Is some additional information needed? What could I do now?

Regards,
Verena

Re: [Php-java-bridge-users] bridging from J2SE to PHP possible?

[<php...@li...>]

Hi Verena,

> > /opt/jdk1.6/bin/jrunscript -l php-intractive

There are two ScriptEngines available, one is
php-interactive and the other one is the "normal" php
evaluator, which requires the "<?php" prefix.

In any case, the log and error output appears in a
file JavaBridge.log in the current directory. One can
change this with the
-Dphp.java.bridge.default_log_file="" option (empty
string means log to stderr).

The difference between "php-interactive" and php is
that the former starts a Lisp/Scheme style repl, which
in turn needs the java_closure() primitive to function
properly. -- PHP was not designed for Lisp style
evaluation, so "php-interactive" is pretty much
experimental at the moment.

> Now I got a php-interactive> command prompt.
> Now I tried things like 
> echo "test";
> with and without the ;, with <? or <?php and so on,
> but always I got:
> php-interactive> echo "2";
> script error: Could not evaluate script

You should find the reason in the JavaBridge.log. Most
likely the java_closure() syntax is not available. It
is exported from both, the pure PHP implementation
"java/Java.php" and from the java.so extension.


However, 

  jrunscript -l php testfile.php

should work as it doesn't need java_closure().


Regards,
Jost Boekemeier



		
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Re: [Php-java-bridge-users] bridging from J2SE to PHP possible?

[<php...@li...>]

Hi,

thanks a lot for your help!

> > Now I got a php-interactive> command prompt.
> > Now I tried things like
> > echo "test";
> > with and without the ;, with <? or <?php and so on,
> > but always I got:
> > php-interactive> echo "2";
> > script error: Could not evaluate script
>
> You should find the reason in the JavaBridge.log. Most
> likely the java_closure() syntax is not available. It
> is exported from both, the pure PHP implementation
> "java/Java.php" and from the java.so extension.
The problem was that I didn't had a php-cgi binary and so there was an 
IOException. I made a ln -s to the php5 binary. This solves the script error, 
but now there is the same error about the missing invoke method at interface 
javax.script.Invocable.invoke as when I tried to compile the test class.

>   jrunscript -l php testfile.php
>
> should work as it doesn't need java_closure().
actually nothing (visual) happens in that case. The file contains 
<?php echo "test"; ?>
Neither any output to the console nor in the log file.

Regards,
Verena

Re: [Php-java-bridge-users] bridging from J2SE to PHP possible?

[<php...@li...>]

Am Dienstag, 14. November 2006 19:30 schrieb 
php...@li...:
> The folder
> http://php-java-bridge.sourceforge.net/server/test/
> contains a few tests.

I tried http://php-java-bridge.sourceforge.net/server/test/HelloWorld.java:

verena@dhcppc8:~/tmp> /usr/java/jdk1.6.0/bin/javac HelloWorld.java
HelloWorld.java:27: cannot find symbol
symbol  : method invoke(java.lang.String,java.lang.Object[])
location: interface javax.script.Invocable
            String name = (String) 
((Invocable)engine).invoke("java_get_server_name", new Object[]{});
                            ^
HelloWorld.java:32: cannot find symbol
symbol  : method invoke(java.lang.String,java.lang.Object[])
location: interface javax.script.Invocable
                    name = (String) 
((Invocable)engine).invoke("java_get_server_name", new Object[]{});
                            ^
2 errors

Did you develop this class with the RC of JDK1.6? Did the interface change?

Regards,
Verena

Re: [Php-java-bridge-users] bridging from J2SE to PHP possible?

[<php...@li...>]

Hi Verena,


> Did you develop this class with the RC of JDK1.6?
> Did the interface change?

we've tested against the beta version of jdk1.6. There
were some changes since then, so this might be the
case, please see the ticket PR1597124 for details

->
http://sourceforge.net/tracker/index.php?func=detail&aid=1597124&group_id=117793&atid=679233


Regards,
Jost Boekemeier


		
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Re: [Php-java-bridge-users] bridging from J2SE to PHP possible?

[<php...@li...>]

Am Montag, 13. November 2006 19:30 schrieb 
php...@li...:
> > I couldn't find any information about
> > this on the php-java
> > bridge website, it's all about web development.
[...]
> > If not, does somebody know any possibility for this?
>
> An old version (2.0.8) contained some MONO/NET GTK
> examples.
I had a look there. But all I found was the other way round: a PHP class 
instanciating some MONO or JAVA classes. I'd like to write a Java class wich 
instanciates a PHP class.

Regards,
Verena