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WorkerServlet.java
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WorkerServlet.java
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/*
* (The MIT License)
*
* Copyright (c) 2011 Rakuraku Jyo <jyo.rakuraku@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the 'Software'), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to
* do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*/
package h2weibo.worker;
import h2weibo.InitServlet;
import h2weibo.Twitter2Weibo;
import h2weibo.model.DBHelper;
import h2weibo.model.DBHelperFactory;
import h2weibo.model.T2WUser;
import org.apache.log4j.Logger;
import redis.clients.jedis.JedisPool;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
/**
* @author Rakuraku Jyo
*/
public class WorkerServlet extends InitServlet {
private static final Logger log = Logger.getLogger(WorkerServlet.class.getName());
@Override
public void init(final ServletConfig config) throws ServletException {
super.init(config);
log.info("Worker started.");
JedisPool pool = getPool(getServletContext());
// 3 Threads to handle the sync job
new Thread(new SyncWorkerRunnable(DBHelperFactory.createHelper(pool))).start();
}
private static class SyncWorkerRunnable implements Runnable {
private DBHelper helper;
public SyncWorkerRunnable(DBHelper helper) {
this.helper = helper;
}
@Override
public void run() {
long size = helper.getQueueSize();
log.info("Start running, queue size = " + size + ", user count = " + helper.getUserCount());
int multiper = 1;
while (true) {
T2WUser user = helper.pop();
if (user != null) {
multiper = 1;
String userId = user.getUserId();
Twitter2Weibo weibo = new Twitter2Weibo(helper);
weibo.syncTwitter(userId);
log.debug("Syncing for " + userId);
} else {
try {
log.info("No task found, sleeping");
Thread.sleep(4000 * multiper);
multiper *= 2;
} catch (InterruptedException e) {
log.error("Error when try to sleep thread.", e);
}
}
}
}
}
}