Re: [Php-java-bridge-users] Speeding up PHP-Java code

Hi Jost!

Sorry, I forgot to give you information about my environment: 

32-bit Intel Machine
Windows XP + Service Pack 2  
WAMP Version 1.6.5 which includes:
   * Apache 2.0.59
   * PHP 5.1.6 (Using Apache 2.0 Handler as Server API)
JDK 1.5.0.10
PHP-Java Bridge 3.2.1 J2EE

> I assume you mean the DynamicClassLoader. (DynamicLoad may also mean > that you start the bridge and the JVM as a sub component for each incoming
> request).

Yes, I meant the DynamicClassLoader.  

> Do you start Java as a sub component of apache or IIS or as a separate
> component, for example via the Tomcat servlet engine?

I installed PHP-Java Bridge following instructions here:

   TITLE: PHP5, PHP/Java Bridge & Apache on XP PRO + SP2 and examples
   URL: http://www.dsl.uow.edu.au/~sk33/php5java.htm

In that setup, I suppose I start Java as a sub component of Apache (?).

>> 3) The system loads the Java Virtual Machine (JVM). 

> Only if the JVM is running as a sub component of Apache ... AND if Apache ... > cannot maintain a pool of PHP instances, which is usually the case with CGI. 
> (emphasis mine -- Filip)

You mention two conditions:

   1) the JVM is running as a sub component of Apache

   The answer appears to be YES.

   2) Apache cannot maintain a pool of PHP instances, which is usually the case with CGI

   I don't use CGI.  Does that automatically mean my Apache can maintain a pool of instances?

   If that is the case (i.e. the second condition is not met), then the system SHOULD NOT be loading the JVM every time a user requests for a PHP script.

>> 4) The system loads all Java libraries needed by the PHP script.

> Only if the JVM is running as a sub component OR Apache/IIS and PHP is 
> running in CGI mode. (emphasis mine -- Filip)    

Only if the JVM is running as a sub component --- TRUE
Apache/IIS and PHP is running in CGI mode --- FALSE

TRUE or FALSE = TRUE, the system does load all Java libraries needed (e.g. log4j, dom4j, etc.) per request unless they're already in the cache (?)

>> What happens exactly with "static loading"? Is this sequence of events accurate?
>> 
>> 0) User starts up the welcome page of a web application. 
>> The system loads all Java base classes (libraries) AND 
>> the Java Virtual Machine (JVM).

> Well, the JVM is usually started as a separate component. Or in the MINIT
> method invoked during the startup of Apache or IIS. This means that one VM 
> is usually attached to the web server.

So do you think this is the solution to my problem (slow loading per request, esp. the first)?

> The only exception are CGI or console scripts. 

By 'console scripts', do you mean command line scripting (that doesn't use a web server)? 

Thanks again!

Filip

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