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package org.jvnet.glassfish.comms.clb.proxy.http.util;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.TimeUnit;
import org.jvnet.glassfish.comms.clb.proxy.ProxyRequestHandler;
import org.jvnet.glassfish.comms.clb.proxy.config.LoadBalancerProxyConstants;
import org.jvnet.glassfish.comms.clb.proxy.config.ProxyConfig;
/**
* This is an object manager implementation using the ConcurrentQueue from
* grizzly.
*
* @author rampsarathy
*/
public class ObjectManager {
private static ObjectManager _thisInstance = null;
private ArrayBlockingQueue<ProxyRequestHandler> tasks;
private ArrayBlockingQueue<ProxyRequestHandler> ssltasks;
/** Creates a new instance of ObjectManager */
private ObjectManager() {
}
public static synchronized ObjectManager getInstance() {
if (_thisInstance == null) {
_thisInstance = new ObjectManager();
}
return _thisInstance;
}
public void initialize() {
tasks = new ArrayBlockingQueue(
ProxyConfig.getInstance().getRequestPoolSize());
for (int i = 0; i < ProxyConfig.getInstance().getRequestPoolSize(); i++) {
tasks.offer(new ProxyRequestHandler(false));
}
ssltasks = new ArrayBlockingQueue(
ProxyConfig.getInstance().getRequestPoolSize());
for (int i = 0; i < ProxyConfig.getInstance().getRequestPoolSize(); i++) {
ssltasks.offer(new ProxyRequestHandler(true));
}
}
public ProxyRequestHandler pollTask(boolean secure) {
/**
* Could be improved to include resizing logic.
*/
ProxyRequestHandler handler = null;
try {
if (secure) {
handler = ssltasks.poll(
LoadBalancerProxyConstants.REQUEST_POLL_TIMEOUT,
TimeUnit.SECONDS);
} else {
handler = tasks.poll(
LoadBalancerProxyConstants.REQUEST_POLL_TIMEOUT,
TimeUnit.SECONDS);
}
} catch (InterruptedException ex) {
handler = null;
}
return handler;
}
@SuppressWarnings("empty-statement")
public void offerTask(ProxyRequestHandler task, boolean secure) {
try {
if (secure) {
/**
* The task queues will never grow beyond the pool size
* so its not necessary to use the offer API with the wait.
*/
ssltasks.offer(task);
} else {
tasks.offer(task);
}
} catch (Exception e) {
;
}
}
}