package railo.runtime.engine;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import railo.commons.io.SystemUtil;
import railo.commons.lang.SerializableObject;
import railo.runtime.PageContext;
public class ThreadQueueImpl implements ThreadQueue {
private final SerializableObject token=new SerializableObject();
public final List<PageContext> list=new ArrayList<PageContext>();
private final int max;
private long timeout;
public ThreadQueueImpl(int max, long timeout){
this.max=max;
this.timeout=timeout;
}
public void enter(PageContext pc) throws IOException {
//print.e("enter("+Thread.currentThread().getName()+"):"+list.size());
long start=System.currentTimeMillis();
while(true) {
synchronized (token) {
if(list.size()<max) {
//print.e("- ok("+Thread.currentThread().getName()+"):"+list.size());
list.add(pc);
return;
}
}
if(timeout>0) SystemUtil.wait(token,timeout);
else SystemUtil.wait(token);
if(timeout>0 && (System.currentTimeMillis()-start)>=timeout)
throw new IOException("timeout ("+(System.currentTimeMillis()-start)+") ["+timeout+"] is occured, server is busy handling requests");
}
}
public void exit(PageContext pc){
//print.e("exist("+Thread.currentThread().getName()+")");
synchronized (token) {
list.remove(pc);
token.notify();
}
}
public int size(){
return list.size();
}
public void clear() {
list.clear();
token.notifyAll();
}
/*public static class Test extends Thread {
private ThreadQueueImpl queue;
public Test(ThreadQueueImpl queue){
this.queue=queue;
}
public void run(){
String name = Thread.currentThread().getName();
try {
queue.enter(name);
queue.size();
SystemUtil.sleep(50);
queue.exit(name);
}
catch (IOException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) {
ThreadQueueImpl queue=new ThreadQueueImpl(4,1000);
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
new Test(queue).start();
}*/
}