##### Coverage Report - org.apache.turbine.services.schedule.JobQueue

Classes in this File | Line Coverage | Branch Coverage | Complexity
JobQueue |
91% | 34/37
50% | 6/12
| 1.8181818181818181;1,818
JobQueue$1 |
100% | 4/4
N/A | N/A
| 1.8181818181818181;1,818

1 |  |
     package org.apache.turbine.services.schedule;
2 |  |
3 |  |
     /*
4 |  |
      * Licensed to the Apache Software Foundation (ASF) under one
5 |  |
      * or more contributor license agreements.  See the NOTICE file
6 |  |
      * distributed with this work for additional information
7 |  |
      * regarding copyright ownership.  The ASF licenses this file
8 |  |
      * to you under the Apache License, Version 2.0 (the
9 |  |
      * "License"); you may not use this file except in compliance
10 |  |
      * with the License.  You may obtain a copy of the License at
11 |  |
      *
12 |  |
      *   http://www.apache.org/licenses/LICENSE-2.0
13 |  |
      *
14 |  |
      * Unless required by applicable law or agreed to in writing,
15 |  |
      * software distributed under the License is distributed on an
16 |  |
      * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 |  |
      * KIND, either express or implied.  See the License for the
18 |  |
      * specific language governing permissions and limitations
19 |  |
      * under the License.
20 |  |
      */
21 |  |
22 |  |
     import java.util.Collections;
23 |  |
     import java.util.Comparator;
24 |  |
     import java.util.List;
25 |  |
     import java.util.Vector;
26 |  |
27 |  |
     import org.apache.turbine.util.TurbineException;
28 |  |
29 |  |
     /**
30 |  |
      * Queue for the scheduler.
31 |  |
      *
32 |  |
      * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
33 |  |
      * @author <a href="mailto:quintonm@bellsouth.net">Quinton McCombs</a>
34 |  |
      * @version $Id: JobQueue.java 615328 2008-01-25 20:25:05Z tv $
35 |  |
      * @param <J> a specialized job entry type
36 |  |
      */
37 |  |
     public class JobQueue<J extends JobEntry>
38 |  |
     {
39 |  |
         /**
40 |  |
          * The queue of <code>JobEntry</code> objects.
41 |  |
          */
42 | 4 |
         private Vector<J> queue = null;
43 |  |
44 |  |
         /**
45 |  |
          * Creates a new instance.
46 |  |
          */
47 |  |
         public JobQueue()
48 | 4 |
         {
49 | 4 |
             queue = new Vector<J>(10);
50 | 4 |
         }
51 |  |
52 |  |
         /**
53 |  |
          * Return the next job off the top of the queue, or <code>null</code> if
54 |  |
          * there are no jobs in the queue.
55 |  |
          *
56 |  |
          * @return The next job in the queue.
57 |  |
          */
58 |  |
         public J getNext()
59 |  |
         {
60 | 8 |
             if (queue.size() > 0)
61 |  |
             {
62 | 8 |
                 return queue.elementAt(0);
63 |  |
             }
64 |  |
             else
65 |  |
             {
66 | 0 |
                 return null;
67 |  |
             }
68 |  |
         }
69 |  |
70 |  |
         /**
71 |  |
          * Return a specific job.
72 |  |
          *
73 |  |
          * @param je The JobEntry we are looking for.
74 |  |
          * @return A JobEntry.
75 |  |
          */
76 |  |
         public J getJob(J je)
77 |  |
         {
78 | 1 |
             int index = -1;
79 |  |
80 | 1 |
             if (je != null)
81 |  |
             {
82 | 1 |
                 index = queue.indexOf(je);
83 |  |
             }
84 |  |
85 | 1 |
             if (index < 0)
86 |  |
             {
87 | 0 |
                 return null;
88 |  |
             }
89 |  |
             else
90 |  |
             {
91 | 1 |
                 return queue.elementAt(index);
92 |  |
             }
93 |  |
         }
94 |  |
95 |  |
         /**
96 |  |
          * List jobs in the queue.  This is used by the scheduler UI.
97 |  |
          *
98 |  |
          * @return A Vector of <code>JobEntry</code> objects.
99 |  |
          */
100 |  |
         @SuppressWarnings("unchecked")
101 |  |
         public Vector<J> list()
102 |  |
         {
103 | 5 |
             if (queue != null && queue.size() > 0)
104 |  |
             {
105 | 5 |
                 return (Vector<J>) queue.clone();
106 |  |
             }
107 |  |
             else
108 |  |
             {
109 | 0 |
                 return null;
110 |  |
             }
111 |  |
         }
112 |  |
113 |  |
         /**
114 |  |
          * Add a job to the queue.
115 |  |
          *
116 |  |
          * @param je A JobEntry job.
117 |  |
          */
118 |  |
         public synchronized void add(J je)
119 |  |
         {
120 | 1 |
             queue.addElement(je);
121 | 1 |
             sortQueue();
122 | 1 |
         }
123 |  |
124 |  |
         /**
125 |  |
          * Batch load jobs.  Retains any already enqueued jobs.  Called on
126 |  |
          * <code>SchedulerService</code> start-up.
127 |  |
          *
128 |  |
          * @param jobEntries A list of the <code>JobEntry</code> objects to load.
129 |  |
          */
130 |  |
         public synchronized void batchLoad(List<J> jobEntries)
131 |  |
         {
132 | 4 |
             if (jobEntries != null)
133 |  |
             {
134 | 4 |
                 queue.addAll(jobEntries);
135 | 4 |
                 sortQueue();
136 |  |
             }
137 |  |
138 | 4 |
         }
139 |  |
140 |  |
         /**
141 |  |
          * Remove a job from the queue.
142 |  |
          *
143 |  |
          * @param je A JobEntry with the job to remove.
144 |  |
          */
145 |  |
         public synchronized void remove(J je)
146 |  |
         {
147 | 2 |
             queue.removeElement(je);
148 | 2 |
             sortQueue();
149 | 2 |
         }
150 |  |
151 |  |
         /**
152 |  |
          * Modify a job on the queue.
153 |  |
          *
154 |  |
          * @param je A JobEntry with the job to modify
155 |  |
          * @throws TurbineException if the runtime calculation fails
156 |  |
          */
157 |  |
         public synchronized void modify(J je) throws TurbineException
158 |  |
         {
159 | 1 |
             remove(je);
160 | 1 |
             je.calcRunTime();
161 | 1 |
             this.add(je);
162 | 1 |
             sortQueue();
163 | 1 |
         }
164 |  |
165 |  |
         /**
166 |  |
          * Update the job for its next run time.
167 |  |
          *
168 |  |
          * @param je A JobEntry to be updated.
169 |  |
          * @throws TurbineException a generic exception.
170 |  |
          */
171 |  |
         public synchronized void updateQueue(J je)
172 |  |
                 throws TurbineException
173 |  |
         {
174 | 1 |
             je.calcRunTime();
175 | 1 |
             sortQueue();
176 | 1 |
         }
177 |  |
178 |  |
         /**
179 |  |
          * Re-sort the existing queue.  Consumers of this method should be
180 |  |
          * <code>synchronized</code>.
181 |  |
          */
182 |  |
         private void sortQueue()
183 |  |
         {
184 | 9 |
             Comparator<J> aComparator = new Comparator<J>()
185 | 11 |
             {
186 |  |
                 @Override
187 |  |
                 public int compare(J o1, J o2)
188 |  |
                 {
189 | 2 |
                     Long time1 = Long.valueOf(o1.getNextRuntime());
190 | 2 |
                     Long time2 = Long.valueOf(o2.getNextRuntime());
191 | 2 |
                     return (time1.compareTo(time2));
192 |  |
                 }
193 |  |
             };
194 |  |
195 | 9 |
             Collections.sort(queue, aComparator);
196 | 9 |
         }
197 |  |
     }