Coverage Report - org.apache.camel.bam.ActivityMonitorEngine
 
Classes in this File Line Coverage Branch Coverage Complexity
ActivityMonitorEngine
0% 
0% 
0
 
 1  
 /**
 2  
  *
 3  
  * Licensed to the Apache Software Foundation (ASF) under one or more
 4  
  * contributor license agreements.  See the NOTICE file distributed with
 5  
  * this work for additional information regarding copyright ownership.
 6  
  * The ASF licenses this file to You under the Apache License, Version 2.0
 7  
  * (the "License"); you may not use this file except in compliance with
 8  
  * the License.  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  
 package org.apache.camel.bam;
 19  
 
 20  
 import org.apache.camel.bam.model.ActivityState;
 21  
 import org.apache.camel.impl.ServiceSupport;
 22  
 import org.apache.commons.logging.Log;
 23  
 import org.apache.commons.logging.LogFactory;
 24  
 import org.springframework.orm.jpa.JpaCallback;
 25  
 import org.springframework.orm.jpa.JpaTemplate;
 26  
 import org.springframework.transaction.support.TransactionTemplate;
 27  
 import org.springframework.transaction.support.TransactionCallbackWithoutResult;
 28  
 import org.springframework.transaction.TransactionStatus;
 29  
 
 30  
 import javax.persistence.EntityManager;
 31  
 import javax.persistence.LockModeType;
 32  
 import javax.persistence.PersistenceException;
 33  
 import java.util.Date;
 34  
 import java.util.List;
 35  
 
 36  
 /**
 37  
  * @version $Revision: $
 38  
  */
 39  0
 public class ActivityMonitorEngine extends ServiceSupport implements Runnable {
 40  0
     private static final Log log = LogFactory.getLog(ActivityMonitorEngine.class);
 41  
 
 42  
     private JpaTemplate template;
 43  
     private TransactionTemplate transactionTemplate;
 44  
     private ProcessRules rules;
 45  0
     private int escalateLevel = 0;
 46  0
     private long windowMillis = 1000L;
 47  
     private Thread thread;
 48  
 
 49  0
     public ActivityMonitorEngine(JpaTemplate template, TransactionTemplate transactionTemplate, ProcessRules rules) {
 50  0
         this.template = template;
 51  0
         this.transactionTemplate = transactionTemplate;
 52  0
         this.rules = rules;
 53  0
     }
 54  
 
 55  
     public void run() {
 56  0
         log.info("Starting to poll for timeout events");
 57  
 
 58  0
         while (!isStopped()) {
 59  
             try {
 60  0
                 long now = System.currentTimeMillis();
 61  0
                 long nextPoll = now + windowMillis;
 62  0
                 final Date timeNow = new Date(now);
 63  
 
 64  0
                 transactionTemplate.execute(new TransactionCallbackWithoutResult() {
 65  0
                     protected void doInTransactionWithoutResult(TransactionStatus status) {
 66  0
                         List<ActivityState> list = template.find("select x from " + ActivityState.class.getName() + " x where x.escalationLevel = ?1 and x.timeOverdue < ?2", escalateLevel, timeNow);
 67  0
                         for (ActivityState activityState : list) {
 68  0
                             fireExpiredEvent(activityState);
 69  0
                         }
 70  0
                     }
 71  
                 });
 72  
 
 73  0
                 long timeToSleep = nextPoll - System.currentTimeMillis();
 74  0
                 if (timeToSleep > 0) {
 75  0
                     log.debug("Sleeping for " + timeToSleep + " millis");
 76  
                     try {
 77  0
                         Thread.sleep(timeToSleep);
 78  
                     }
 79  0
                     catch (InterruptedException e) {
 80  0
                         log.debug("Caught: " + e, e);
 81  0
                     }
 82  
                 }
 83  
             }
 84  0
             catch (Exception e) {
 85  0
                 log.error("Caught: " + e, e);
 86  0
             }
 87  0
         }
 88  0
     }
 89  
 
 90  
     protected void fireExpiredEvent(final ActivityState activityState) {
 91  0
         log.info("Trying to fire expiration of: " + activityState);
 92  
 
 93  0
         template.execute(new JpaCallback() {
 94  0
             public Object doInJpa(EntityManager entityManager) throws PersistenceException {
 95  
                 // lets try lock the object first
 96  0
                 entityManager.lock(activityState, LockModeType.WRITE);
 97  0
                 if (activityState.getEscalationLevel() == escalateLevel) {
 98  
                     try {
 99  0
                         rules.processExpired(activityState);
 100  
                     }
 101  0
                     catch (Exception e) {
 102  0
                         log.error("Failed to process expiration of: " + activityState + ". Reason: " + e, e);
 103  0
                     }
 104  0
                     activityState.setEscalationLevel(escalateLevel + 1);
 105  
                 }
 106  0
                 return null;
 107  
             }
 108  
         });
 109  0
     }
 110  
 
 111  
     protected void doStart() throws Exception {
 112  0
         thread = new Thread(this, "ActivityMonitorEngine");
 113  0
         thread.start();
 114  0
     }
 115  
 
 116  
     protected void doStop() throws Exception {
 117  0
         if (thread != null) {
 118  0
             thread = null;
 119  
         }
 120  0
     }
 121  
 }