TestPerformanceMonitorMBean


1   // Copyright 2005 The Apache Software Foundation
2   //
3   // Licensed under the Apache License, Version 2.0 (the "License");
4   // you may not use this file except in compliance with the License.
5   // You may obtain a copy of the License at
6   //
7   //     http://www.apache.org/licenses/LICENSE-2.0
8   //
9   // Unless required by applicable law or agreed to in writing, software
10  // distributed under the License is distributed on an "AS IS" BASIS,
11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  // See the License for the specific language governing permissions and
13  // limitations under the License.
14  
15  package org.apache.hivemind.management.mbeans;
16  
17  import java.util.HashSet  ;
18  import java.util.Set  ;
19  
20  import junit.framework.TestCase;
21  
22  import org.apache.hivemind.service.MethodSignature;
23  
24  /**
25   * Test of {@link org.apache.hivemind.management.mbeans.PerformanceMonitorMBean}
26   * 
27   * @author Achim Huegen
28   */
29  public class TestPerformanceMonitorMBean extends TestCase
30  {
31      /**
32       * Creates a monitor mbean, adds some measurements
33       * and checks the results
34       */
35      public void testMeasurement() throws Exception  
36      {
37          Set   methods = new HashSet  ();
38  
39          // Build a set of methods 
40          MethodSignature method1 = new MethodSignature(void.class, "method1",
41                  new Class  [] {}, new Class  [] {} );
42          MethodSignature method2 = new MethodSignature(void.class, "method2",
43                  new Class  [] {}, new Class  [] {} );
44          methods.add(method1);
45          methods.add(method2);
46          
47          PerformanceMonitorMBean monitor = new PerformanceMonitorMBean(methods);
48          monitor.addMeasurement(method1, 100);
49          monitor.addMeasurement(method1, 50);
50  
51          // Add a second measurement to ensure that methods don't mix up
52          monitor.addMeasurement(method2, 1000);
53          monitor.addMeasurement(method2, 500);
54          
55          checkAttributeValue(monitor, method1, PerformanceMonitorMBean.DATA_TYPE_MAXIMUM_TIME, 100);
56          checkAttributeValue(monitor, method1, PerformanceMonitorMBean.DATA_TYPE_AVERAGE_TIME, 75);
57          checkAttributeValue(monitor, method1, PerformanceMonitorMBean.DATA_TYPE_MINIMUM_TIME, 50);
58          checkAttributeValue(monitor, method1, PerformanceMonitorMBean.DATA_TYPE_COUNT, 2);
59          checkAttributeValue(monitor, method1, PerformanceMonitorMBean.DATA_TYPE_LAST_TIME, 50);
60      }
61      
62      private void checkAttributeValue(PerformanceMonitorMBean monitor,
63              MethodSignature method, String   dataType, long expectedValue) throws Exception  
64      {
65          String   attrName = monitor.buildAttributeName(method, 
66                  dataType);
67          Long   attrValue = (Long  ) monitor.getAttribute(attrName);
68          assertEquals(expectedValue, attrValue.longValue() );
69      }
70      
71  }
72
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