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*
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* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
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*
* This software is distributed in the hope that it will be useful,
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
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package org.infinispan.eviction;
import org.infinispan.config.Configuration;
import org.infinispan.config.GlobalConfiguration;
import org.infinispan.manager.EmbeddedCacheManager;
import org.infinispan.test.SingleCacheManagerTest;
import org.infinispan.test.fwk.TestCacheManagerFactory;
import org.testng.annotations.Test;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
/**
* Tests eviction thread counts under several distinct circumstances.
*
* @author Galder ZamarreƱo
* @since 4.2
*/
@Test(groups = "functional", testName = "eviction.EvictionThreadCountTest")
public class EvictionThreadCountTest extends SingleCacheManagerTest {
private static String EVICT_THREAD_NAME_PREFIX = EvictionThreadCountTest.class.getSimpleName() + "-thread";
@Override
protected EmbeddedCacheManager createCacheManager() throws Exception {
GlobalConfiguration globalCfg = new GlobalConfiguration().fluent()
.evictionScheduledExecutor()
.addProperty("threadNamePrefix", EVICT_THREAD_NAME_PREFIX)
.build();
return TestCacheManagerFactory.createCacheManager(globalCfg);
}
public void testDefineMultipleCachesWithEviction() {
for (int i = 0; i < 50; i++) {
Configuration cfg = new Configuration().fluent()
.eviction().strategy(EvictionStrategy.LIRS).maxEntries(128) // 128 max entries
.expiration().wakeUpInterval(100L)
.locking().useLockStriping(false) // to minimize chances of deadlock in the unit test
.build();
String cacheName = Integer.toString(i);
cacheManager.defineConfiguration(cacheName, cfg);
cacheManager.getCache(cacheName);
}
ThreadMXBean threadMBean = ManagementFactory.getThreadMXBean();
ThreadInfo[] threadInfos = threadMBean.dumpAllThreads(false, false);
String pattern = "Scheduled-" + EVICT_THREAD_NAME_PREFIX;
int evictionThreadCount = 0;
for (ThreadInfo threadInfo : threadInfos) {
if (threadInfo.getThreadName().startsWith(pattern))
evictionThreadCount++;
}
assert evictionThreadCount == 1 : "Thread should only be one eviction thread with pattern '"
+ pattern + "', instead there were " + evictionThreadCount;
}
}