PHP/Java Bridge SvnRepo

--- a
+++ b/trunk/php-java-bridge/server/php/java/bridge/ThreadPool.java
@@ -0,0 +1,57 @@
+/*-*- mode: Java; tab-width:8 -*-*/
+
+package php.java.bridge;
+
+import java.util.LinkedList;
+
+public class ThreadPool {
+    private String name;
+    private int threads = 0, idles = 0, poolMaxSize;
+    private LinkedList runnables = new LinkedList();
+
+    /*
+     * Threads continues to pull runnables and run them in the thread
+     * environment.
+     */
+    private class Delegate extends Thread {
+	public Delegate() { super(name); threads++; }
+	public void run() {
+	    try {
+		while(true) getNextRunnable().run();
+	    } catch (InterruptedException t) { threads--; }
+	}
+    }
+
+    /* 
+     * Helper: Pull a runnable off the list of runnables. If there's
+     * no work, sleep the thread until we receive a notify.
+     */
+    private synchronized Runnable getNextRunnable() throws InterruptedException {
+	if(runnables.isEmpty()) {
+	    idles++; wait(); idles--;
+	}
+	return (Runnable)runnables.removeFirst();
+    }
+
+    /*
+     * Push a runnable to the list of runnables. The notify will fail
+     * if all threads are busy. Since the pool contains at least one
+     * thread, it will pull the runnable off the list when it becomes
+     * available.
+     */
+    public synchronized void start(Runnable r) {
+	runnables.add(r);
+	if(idles==0 && threads < poolMaxSize) {
+	    Delegate d = new Delegate();
+	    d.setContextClassLoader(DynamicJavaBridgeClassLoader.newInstance());
+	    d.start();
+	}
+	else
+	    notify();
+    }
+
+    public ThreadPool (String name, int poolMaxSize) {
+	this.name = name;
+    	this.poolMaxSize = poolMaxSize;
+    }
+}