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JProcess.java
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136 lines (123 loc) · 3.44 KB
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package javaforce;
import java.net.*;
import java.lang.reflect.*;
import java.util.*;
import java.awt.Window;
/**
* JProcess represents one process within a JVM.<br> Each JProcess has its own
* ThreadGroup, ClassLoader.<br> You must use JProcessManager to create
* JProcess'es.<br>
*
* @see JProcessManager
*/
public class JProcess implements Runnable {
private URLClassLoader loader;
private ThreadGroup threadGroup;
private String name;
private int pid; //unique ID
private Thread mainThread;
private int state;
private final static int INIT = 0;
private final static int RUNNING = 1;
private final static int STOPPED = 2; //System.exit() or kill()ed
private Method mainMethod;
private String args[];
private ArrayList<Window> windowList;
private String className;
private String user_dir;
private JProcess() {
windowList = new ArrayList<Window>();
}
/**
* DO NOT CALL DIRECTLY. YOU MUST CALL JProcessManager.createJProcess()
* INSTEAD.<br> Creates an instance of JProcess.<br>
*/
public static JProcess createInstance(String className, String[] args, URL[] paths, ThreadGroup rootThreadGroup, int pid, String user_dir) {
JProcess process = new JProcess();
process.pid = pid;
process.state = INIT;
process.className = className;
process.user_dir = user_dir;
if (args != null) {
process.args = args;
} else {
process.args = new String[0];
}
if (paths == null) {
paths = new URL[0];
}
process.loader = new URLClassLoader(paths);
process.name = process.toString();
process.threadGroup = new ThreadGroup(rootThreadGroup, process.name);
process.threadGroup.setMaxPriority(Thread.MAX_PRIORITY - 1);
try {
Class<?> target_class = process.loader.loadClass(className);
process.mainMethod = target_class.getMethod("main", String[].class);
if (((process.mainMethod.getModifiers() & Modifier.STATIC) == 0) || (process.mainMethod.getModifiers() & Modifier.PUBLIC) == 0) {
return null;
}
return process;
} catch (Exception e) {
JF.showError("error", e.toString());
return null;
}
}
/**
* Starts a process once created from JProcessManager.createJProcess().
*/
public synchronized boolean start() {
if (state != INIT) {
return false;
}
System.setProperty("user.dir", user_dir); //doesn't work!
mainThread = new Thread(threadGroup, this, "JProcess : " + name);
mainThread.start();
state = RUNNING;
return true;
}
/**
* Do not call directly
*/
public void run() {
try {
mainMethod.invoke(null, new Object[]{args});
} catch (Exception e) {
}
}
/**
* DO NOT CALL DIRECTLY. YOU MUST USE JProcessManager.kill() INSTEAD.
*
* @see JProcessManager.kill
*/
public synchronized boolean kill() {
if (state != RUNNING) {
return false;
}
state = STOPPED;
for (int a = 0; a < windowList.size(); a++) {
windowList.get(a).dispose();
}
windowList.clear();
threadGroup.stop();
return true;
}
/**
* DO NOT CALL.<br> Used by JProcessManager to manage which Window's belong to
* this process.
*/
public void addWindow(Window window) {
windowList.add(window);
}
public int getPid() {
return pid;
}
public ThreadGroup getThreadGroup() {
return threadGroup;
}
public ClassLoader getClassLoader() {
return loader;
}
public String getName() {
return name;
}
};