wamblee.org Git - utils/blob

   1 /*
   2  * Copyright 2006 the original author or authors.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.wamblee.crawler.kiss.scheduling.quartz;
  18
  19 import java.util.Date;
  20 import java.util.List;
  21
  22 import org.quartz.JobDetail;
  23 import org.quartz.Scheduler;
  24 import org.quartz.SchedulerException;
  25 import org.quartz.SchedulerFactory;
  26 import org.quartz.SimpleTrigger;
  27 import org.quartz.Trigger;
  28 import org.quartz.TriggerUtils;
  29 import org.quartz.impl.StdSchedulerFactory;
  30 import org.wamblee.crawler.kiss.scheduling.CrawlerScheduler;
  31
  32 /**
  33  * Interface to the Quartz scheduler.
  34  */
  35 public class QuartzCrawlerScheduler implements CrawlerScheduler {
  36
  37     /**
  38      *
  39      */
  40     private static final String TRIGGER_NAME = "interval";
  41
  42     /**
  43      *
  44      */
  45     private static final String JOB_NAME = "kisscrawler";
  46
  47     private Scheduler _scheduler;
  48
  49     private int _intervalInSeconds;
  50
  51     /**
  52      * Constructs the quartz interface.
  53      * @param aIntervalInSeconds Scheduling interval in seconds.
  54      * @throws SchedulerException
  55      */
  56     public QuartzCrawlerScheduler(int aIntervalInSeconds) throws SchedulerException {
  57         SchedulerFactory schedulerFactory = new StdSchedulerFactory();
  58         _scheduler = schedulerFactory.getScheduler();
  59         _intervalInSeconds = aIntervalInSeconds;
  60     }
  61
  62     /**
  63      * Initializes the scheduler.
  64      * @throws SchedulerException
  65      */
  66     public void initialize() throws SchedulerException {
  67         _scheduler.start();
  68
  69         JobDetail jobDetail = new JobDetail(JOB_NAME, null, CrawlerJob.class);
  70         Trigger trigger = TriggerUtils.makeSecondlyTrigger(_intervalInSeconds);
  71         //trigger.setStartTime(TriggerUtils.getEvenHourDate(new Date()));
  72         trigger.setStartTime(new Date());
  73         trigger.setName(TRIGGER_NAME);
  74
  75         _scheduler.scheduleJob(jobDetail, trigger);
  76     }
  77
  78     /* (non-Javadoc)
  79      * @see org.wamblee.crawler.kiss.scheduling.CrawlerScheduler#isCrawlerRunning()
  80      */
  81     public boolean isCrawlerRunning() throws Exception {
  82         List jobs = _scheduler.getCurrentlyExecutingJobs();
  83         return jobs.size() > 0;
  84     }
  85
  86     /* (non-Javadoc)
  87      * @see org.wamblee.crawler.kiss.scheduling.CrawlerScheduler#scheduleNow()
  88      */
  89     public void scheduleNow() throws Exception {
  90         Trigger trigger = new SimpleTrigger("immediate", null);
  91         trigger.setJobName(JOB_NAME);
  92         _scheduler.scheduleJob(trigger);
  93     }
  94
  95     /**
  96      * Shuts down the scheduler.
  97      * @throws SchedulerException
  98      */
  99     public void shutdown() throws SchedulerException {
 100         _scheduler.shutdown();
 101     }
 102 }