com.wabacus.system.task.TimingThread.java Source code

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Here is the source code for com.wabacus.system.task.TimingThread.java

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/* 
 * Copyright (C) 2010---2014 (wuweixing)<349446658@qq.com>
 * 
 * This file is part of Wabacus 
 * 
 * Wabacus is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.wabacus.system.task;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.wabacus.config.Config;
import com.wabacus.util.Tools;

public class TimingThread extends Thread {
    private static Log log = LogFactory.getLog(TimingThread.class);

    private final static TimingThread instance = new TimingThread();

    private boolean RUNNING_FLAG = true;

    private List<String> lstTasksIds;

    private List<ITask> lstTasks;

    private long intervalMilSeconds = Long.MIN_VALUE;

    public static TimingThread getInstance() {
        return instance;
    }

    public boolean addTask(ITask taskObj) {
        if (lstTasks == null)
            lstTasks = new ArrayList<ITask>();
        if (lstTasksIds == null)
            lstTasksIds = new ArrayList<String>();
        if (lstTasksIds.contains(taskObj.getTaskId()))
            return false;//?
        lstTasks.add(taskObj);
        lstTasksIds.add(taskObj.getTaskId());
        return true;
    }

    public boolean removeTask(ITask taskObj) {
        if (lstTasks == null)
            return false;
        ITask taskTmp;
        for (int i = 0; i < this.lstTasks.size(); i++) {
            taskTmp = this.lstTasks.get(i);
            if (taskTmp.getTaskId().equals(taskObj.getTaskId())) {
                this.lstTasks.remove(i);
                if (this.lstTasksIds != null)
                    this.lstTasksIds.remove(taskTmp.getTaskId());
                return true;
            }
        }
        return false;
    }

    public boolean isExistTask(String taskId) {
        if (Tools.isEmpty(this.lstTasksIds))
            return false;
        return this.lstTasksIds.contains(taskId);
    }

    public void reset() {
        this.lstTasks = null;
        this.lstTasksIds = null;
        this.intervalMilSeconds = Long.MIN_VALUE;
    }

    public void start() {
        if (this.lstTasks == null || this.lstTasks.size() == 0)
            return;
        super.start();
    }

    public void run() {
        while (RUNNING_FLAG) {
            if (this.lstTasks == null || this.lstTasks.size() == 0)
                break;
            for (ITask taskObjTmp : lstTasks) {
                try {
                    if (taskObjTmp.shouldExecute())
                        taskObjTmp.execute();
                } catch (Exception e) {
                    log.error("" + taskObjTmp.getTaskId() + "", e);
                }
            }
            if (this.intervalMilSeconds == Long.MIN_VALUE) {
                intervalMilSeconds = Config.getInstance().getSystemConfigValue("timing-thread-interval", 15)
                        * 1000L;
                if (intervalMilSeconds <= 0)
                    intervalMilSeconds = 15 * 1000L;
            }
            if (this.intervalMilSeconds > 0) {
                try {
                    Thread.sleep(this.intervalMilSeconds);
                } catch (InterruptedException e) {
                    log.warn("wabacus???", e);
                }
            }
        }
    }

    public void stopRunning() {
        RUNNING_FLAG = false;
        if (this.lstTasks != null) {
            for (ITask taskObjTmp : lstTasks) {
                try {
                    taskObjTmp.destory();
                } catch (Exception e) {
                    log.error("?" + taskObjTmp.getTaskId() + "", e);
                }
            }
        }
    }
}