php.java.script.servlet
Class InvocablePhpServletScriptEngine

java.lang.Object
  javax.script.AbstractScriptEngine
      php.java.script.SimplePhpScriptEngine
          php.java.script.InvocablePhpScriptEngine
              php.java.script.servlet.InvocablePhpServletLocalHttpServerScriptEngine
                  php.java.script.servlet.InvocablePhpServletScriptEngine

All Implemented Interfaces:

java.io.Closeable, Invocable, ScriptEngine

public final class InvocablePhpServletScriptEngine
extends InvocablePhpServletLocalHttpServerScriptEngine

A PHP script engine which implements the Invocable interface for Servlets. See ContextLoaderListener for details. PHP scripts are evaluated as follows:

1. "http://127.0.0.1:CURRENT_PORT/CURRENT_WEBAPP/java/JavaProxy.php" is requested from Java
   
2. Your script is evaluated
3. <?php java_context()->call(java_closure());?> is called in order to make the script invocable
   

In order to evaluate PHP methods follow these steps:

1. Create a factory which creates a PHP script file from a reader using the methods from EngineFactory:

   private static File script;
private static final File getScriptF() {
if (script!=null) return script;

String webCacheDir = ctx.getRealPath(req.getServletPath());
Reader reader = new StringReader ("<?php function f($v) {return "passed:".$v;} ?>");
return EngineFactory.getPhpScript(webCacheDir, reader);
}


2. Acquire a PHP invocable script engine from the EngineFactory:

   ScriptEngine scriptEngine = EngineFactory.getInvocablePhpScriptEngine(this, ctx, req, res);

3. Create a FileReader for the created script file:

   Reader readerF = EngineFactory.createPhpScriptFileReader(getScriptF());

4. Evaluate the engine:

   scriptEngine.eval(readerF);

5. Close the reader obtained from the EngineFactory:

   readerF.close();

6. Cast the engine to Invocable:

   Invocable invocableEngine = (Invocable)scriptEngine;

7. Call PHP functions or methods:

   System.out.println("result from PHP:" + invocableEngine.invoceFunction(f, new Object[]{"arg1"}));

8. Release the invocable:

   ((Closeable)scriptEngine).close();

Alternatively one may use the following "quick and dirty" code which creates a new PHP script for each eval and removes it when the invocable is released:

ScriptEngine e = EngineFactory.getInvocablePhpScriptEngine(this, ctx, req, res);
e.eval("<?php function f($v) {return "passed:".$v;} ?>");
((Invocable)e).invoceFunction("f", new Object[]{"arg1"};
((Closeable)e).close();


Field Summary

Fields inherited from interface javax.script.ScriptEngine

ARGV, ENGINE, ENGINE_VERSION, FILENAME, LANGUAGE, LANGUAGE_VERSION, NAME

Constructor Summary

InvocablePhpServletScriptEngine(javax.servlet.Servlet servlet, javax.servlet.ServletContext ctx, javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res, java.lang.String protocol, int port)

Method Summary

void	release() Release the continuation.

Methods inherited from class php.java.script.InvocablePhpScriptEngine

getInterface, getInterface, invoke, invoke, invokeFunction, invokeMethod

Methods inherited from class php.java.script.SimplePhpScriptEngine

close, createBindings, eval, eval, getFactory

Methods inherited from class javax.script.AbstractScriptEngine

eval, eval, eval, eval, get, getBindings, getContext, put, setBindings, setContext

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

InvocablePhpServletScriptEngine

public InvocablePhpServletScriptEngine(javax.servlet.Servlet servlet,
                                       javax.servlet.ServletContext ctx,
                                       javax.servlet.http.HttpServletRequest req,
                                       javax.servlet.http.HttpServletResponse res,
                                       java.lang.String protocol,
                                       int port)
                                throws java.net.MalformedURLException,
                                       java.net.URISyntaxException

Throws:

java.net.MalformedURLException

java.net.URISyntaxException

Method Detail

release

public void release()

Release the continuation. Must be called explicitly or via the RequestListener

Overrides:

release in class InvocablePhpScriptEngine