Coverage report

  %line %branch
org.apache.commons.jelly.tags.quartz.QuartzTagSupport$1
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 1  
 package org.apache.commons.jelly.tags.quartz;
 2  
 
 3  
 /*
 4  
  * Copyright 2002,2004 The Apache Software Foundation.
 5  
  *
 6  
  * Licensed under the Apache License, Version 2.0 (the "License");
 7  
  * you may not use this file except in compliance with the License.
 8  
  * You may obtain a copy of the License at
 9  
  *
 10  
  *      http://www.apache.org/licenses/LICENSE-2.0
 11  
  *
 12  
  * Unless required by applicable law or agreed to in writing, software
 13  
  * distributed under the License is distributed on an "AS IS" BASIS,
 14  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 15  
  * See the License for the specific language governing permissions and
 16  
  * limitations under the License.
 17  
  */
 18  
 
 19  
 import org.apache.commons.jelly.TagSupport;
 20  
 import org.quartz.Scheduler;
 21  
 import org.quartz.SchedulerException;
 22  
 import org.quartz.impl.StdSchedulerFactory;
 23  
 
 24  
 /** Basic support for all tags requiring a Quartz scheduler.
 25  
  *
 26  
  *  @author <a href="mailto:bob@eng.werken.com">bob mcwhirter</a>
 27  
  */
 28  
 public abstract class QuartzTagSupport extends TagSupport
 29  
 {
 30  
     /** The scheduler variable name in the JellyContext. */
 31  
     public static final String SCHED_VAR_NAME = "org.apache.commons.jelly.quartz.Scheduler";
 32  
 
 33  
 
 34  
     /** Retrieve or create a scheduler.
 35  
      *
 36  
      *  <p>
 37  
      *  If a scheduler has already been created an installed
 38  
      *  in the variable {@link #SCHED_VAR_NAME}, then that scheduler
 39  
      *  will be returned.  Otherwise, a new StdScheduler will be
 40  
      *  created, started, and installed.  Additionally, a runtime
 41  
      *  shutdown hook will be added to cleanly shutdown the scheduler.
 42  
      *
 43  
      *  @return The scheduler.
 44  
      *
 45  
      *  @throws SchedulerException If there is an error creating the
 46  
      *          scheduler.
 47  
      */
 48  
     public Scheduler getScheduler() throws SchedulerException
 49  
     {
 50  
         Scheduler sched = (Scheduler) getContext().getVariable( SCHED_VAR_NAME );
 51  
 
 52  
         if ( sched == null )
 53  
         {
 54  
             StdSchedulerFactory factory = new StdSchedulerFactory();
 55  
 
 56  
             final Scheduler newSched = factory.getScheduler();
 57  
 
 58  
             sched = newSched;
 59  
 
 60  
             getContext().setVariable( SCHED_VAR_NAME,
 61  
                                       newSched );
 62  
 
 63  
             Runtime.getRuntime().addShutdownHook(
 64  
                 new Thread() {
 65  0
                     public void run()
 66  
                     {
 67  
                         try
 68  
                         {
 69  0
                             if ( ! newSched.isShutdown() )
 70  
                             {
 71  0
                                 newSched.shutdown();
 72  
                             }
 73  0
                         }
 74  
                         catch (SchedulerException e)
 75  
                         {
 76  0
                             e.printStackTrace();
 77  
                         }
 78  0
                     }
 79  
                 }
 80  
                 );
 81  
             newSched.start();
 82  
         }
 83  
 
 84  
 
 85  
         return sched;
 86  
     }
 87  
 }
 88  
 

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