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Java > Open Source Codes > com > jcorporate > expresso > core > cache > CacheStressTest


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64
65 package com.jcorporate.expresso.core.cache;
66
67 import com.jcorporate.expresso.services.test.ExpressoTestCase;
68 import com.jcorporate.expresso.services.test.TestSystemInitializer;
69 import junit.framework.Test;
70 import junit.framework.TestSuite;
71 import org.apache.log4j.Logger;
72
73 import java.util.Date JavaDoc;
74 import java.util.Enumeration JavaDoc;
75 import java.util.Vector JavaDoc;
76
77
78 /**
79  * Cache Stress test. Scales the number of threads accessing the cache
80  * at a particular time.
81  *
82  * @author Michael Nash
83  * @author Michael Rimov
84  * @version $Revision: 1.3 $ on $Date: 2004/11/17 20:48:22 $
85  */
86 public class CacheStressTest
87         extends ExpressoTestCase {
88
89     private static final Logger log = Logger.getLogger(CacheStressTest.class);
90
91     private String JavaDoc cacheName = "testcache";
92
93     /**
94      * Each index in the array represents one suite of test with the
95      * specified number of threads.
96      */
97     final int[] numThreads = {5, 10, 25, 50, 100, 200};
98 // int[] numThreads = {10,25}; //Use this line if you're profiling and just want
99 // an idea of what's going on.
100
101     /**
102      * Constructs a test case with the given name.
103      *
104      * @param name The test name
105      */
106     public CacheStressTest(String JavaDoc name)
107             throws Exception JavaDoc {
108         super(name);
109     } /* CacheTest(String) */
110
111
112     public static void main(String JavaDoc[] args)
113             throws Exception JavaDoc {
114
115         //Set the system properties we need
116 junit.textui.TestRunner.run(suite());
117     }
118
119     /**
120      * Sets up the fixture, for example, open a network connection.
121      * This method is called before a test is executed.
122      */
123     public void setUp()
124             throws Exception JavaDoc {
125         try {
126             CacheManager.createCache(TestSystemInitializer.getTestContext(), cacheName, false);
127
128             /* Create an ordered cache as well */
129             CacheManager.createCache(TestSystemInitializer.getTestContext(), cacheName + "O", true);
130         } catch (java.util.ConcurrentModificationException JavaDoc cme) {
131             log.error("Error Setting Up", cme);
132             throw cme;
133         }
134     } /* setUp() */
135
136
137     /**
138      * Tears down the fixture, for example, close a network connection.
139      * This method is called after a test is executed.
140      */
141     public void tearDown()
142             throws Exception JavaDoc {
143         try {
144             CacheManager.clear(TestSystemInitializer.getTestContext(), cacheName);
145             CacheManager.clear(TestSystemInitializer.getTestContext(), cacheName + "O");
146         } catch (java.util.ConcurrentModificationException JavaDoc cme) {
147             log.error("Error Tearing Down", cme);
148             throw cme;
149         }
150     } /* tearDown() */
151
152
153     /**
154      * Define the suite of tests that verify each function of the cache
155      *
156      * @return junit.framework.TestSuite
157      */
158     public static Test suite()
159             throws Exception JavaDoc {
160         TestSuite suite = new TestSuite(CacheStressTest.class);
161
162         return suite;
163     } /* suite() */
164
165
166     /**
167      * Counts the number of test cases executed by run(TestResult result).
168      *
169      * @return number of test cases: in this case 1
170      */
171     public int countTestCases() {
172         return 1;
173     } /* countTestCases() */
174
175     /**
176      * Test cache manager in a multi-threaded situation
177      */
178     public void testMultiThreaded() {
179         Vector JavaDoc myThreads = new Vector JavaDoc();
180         Thread JavaDoc oneTest = null;
181         long startTime = new Date JavaDoc().getTime();
182
183         for (int j = 0; j < numThreads.length; j++) {
184             try {
185                 if (myThreads.size() < numThreads[j]) {
186                     for (int i = myThreads.size(); i < numThreads[j]; i++) {
187                         myThreads.addElement(new CacheTestThread("" + i));
188                     }
189                 } else {
190                     myThreads.setSize(numThreads[j]);
191                 }
192                 /* Start 'em up */
193                 for (Enumeration JavaDoc ee = myThreads.elements();
194                      ee.hasMoreElements();) {
195                     oneTest = (Thread JavaDoc) ee.nextElement();
196                     oneTest.start();
197                 }
198                 /* Wait for 'em to finish */
199                 for (Enumeration JavaDoc ee = myThreads.elements();
200                      ee.hasMoreElements();) {
201                     oneTest = (Thread JavaDoc) ee.nextElement();
202
203                     try {
204                         oneTest.join();
205                     } catch (InterruptedException JavaDoc ie) {
206                         oneTest.interrupt();
207
208                         while (ee.hasMoreElements()) {
209                             oneTest = (Thread JavaDoc) ee.nextElement();
210                             oneTest.interrupt();
211                         }
212
213                         throw new CacheException(ie);
214                     }
215                 }
216
217                 log.info("All threaded tests completed");
218             } catch (CacheException ce) {
219                 log.error(ce);
220                 fail("CacheException occurred in multi-threaded test - see log");
221             } catch (java.util.ConcurrentModificationException JavaDoc cme) {
222                 log.error("Error testing simple caching", cme);
223                 throw cme;
224             }
225
226             long endTime = new Date JavaDoc().getTime();
227             System.out.println("\nCacheTest: Total Time for Multi-threaded test: " +
228                     Long.toString(endTime - startTime) +
229                     " ms. Num Threads = " + Integer.toString(numThreads[j]));
230         }
231     } /* testMultiThreaded() */
232
233 }
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