Re: [Php-java-bridge-users] PHP Java Translation Help

Hi,

> Hrm, this is frustrating.  I put this together and
> received a "Call to
> undefined function java()" error (see full error
> below):

It is defined in Java.inc as:

function java($clazz) {
 static $cache;
 if(isset($cache)) return $cache;
 return $cache=new JavaClass($clazz);
}


The function is handy because it hides the class
variable inside the function.

The code:

$System = new JavaClass("java.lang.System");
$systemProps = $System->getProperties();

is equivalent to:

$systemProps=java("java.lang.System")->getProperties();

but the latter is easier to read.



> It seems to not find the objects within Java.inc,

Hmm, when you use the java.so or php_java.dll, some
old versions of Java.inc don't define this function.
It may make sense to implement the function directly
in java.c.


> however it's including
> the file properly in the script so therefore I am
> considering that I
> don't have the Bridge installed properly.  

Mea culpa. I thought that you use the pure PHP
implementation. Just remove the java.so and the script
will work.

> I've followed the j2ee instructions to install the
> bridge as I want
> Tomcat to run the JVM rather than a new JVM trying
> to run each request.

Correct.


> Is this incorrect?  Does a JVM have to start every
> time anyway?

Well, you have two options, a) start Java as a sub
process of Apache or IIS (not recommended, needs
java.so) or b) start Java via a J2EE server or servlet
engine as a system service (recommended).

On Windows/Unix you can start tomcat as a service.


> running this on a Virtual Dedicated Hosting account
> and therefore it's
> not my own server to run as I please.  

Hmm. Do you get a notification when the computer
boots? You can start a persistent java VM with

nohup java -jar JavaBridge.jar <port> 3 jb.log&

but the above VM will terminate when the computer
reboots.


> When I try to run this on the command line: 
> 	java -jar JavaBridge.war --help

In which documentation have you found the above
command? The .war file is a web archive, not an
executable jar file. We could change that in the
future, though.


> I've saved java.so to the php-extension directory
             -------
nak, nak, nak. Remove it, please. :)

The java.so contains code which could make the
communication faster. But it is quite difficult to
handle, especially for beginners.


Regards,
Jost Boekemeier




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