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* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.monitor.jvm;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.unit.ByteSizeValue;
import org.elasticsearch.test.ESTestCase;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import static org.hamcrest.Matchers.anyOf;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.greaterThan;
import static org.hamcrest.Matchers.greaterThanOrEqualTo;
public class JvmStatsTests extends ESTestCase {
public void testJvmStats() throws IOException {
JvmStats stats = JvmStats.jvmStats();
assertNotNull(stats);
assertNotNull(stats.getUptime());
assertThat(stats.getUptime().millis(), greaterThan(0L));
assertThat(stats.getTimestamp(), greaterThan(0L));
// Mem
JvmStats.Mem mem = stats.getMem();
assertNotNull(mem);
for (ByteSizeValue heap : Arrays.asList(mem.getHeapCommitted(), mem.getHeapMax(), mem.getHeapUsed(), mem.getNonHeapCommitted())) {
assertNotNull(heap);
assertThat(heap.getBytes(), greaterThanOrEqualTo(0L));
}
assertNotNull(mem.getHeapUsedPercent());
assertThat(mem.getHeapUsedPercent(), anyOf(equalTo((short) -1), greaterThanOrEqualTo((short) 0)));
// Threads
JvmStats.Threads threads = stats.getThreads();
assertNotNull(threads);
assertThat(threads.getCount(), greaterThanOrEqualTo(0));
assertThat(threads.getPeakCount(), greaterThanOrEqualTo(0));
// GC
JvmStats.GarbageCollectors gcs = stats.getGc();
assertNotNull(gcs);
JvmStats.GarbageCollector[] collectors = gcs.getCollectors();
assertNotNull(collectors);
assertThat(collectors.length, greaterThan(0));
for (JvmStats.GarbageCollector collector : collectors) {
assertTrue(Strings.hasText(collector.getName()));
assertNotNull(collector.getCollectionTime());
assertThat(collector.getCollectionTime().millis(), anyOf(equalTo(-1L), greaterThanOrEqualTo(0L)));
assertThat(collector.getCollectionCount(), anyOf(equalTo(-1L), greaterThanOrEqualTo(0L)));
}
// Buffer Pools
List<JvmStats.BufferPool> bufferPools = stats.getBufferPools();
if (bufferPools != null) {
for (JvmStats.BufferPool bufferPool : bufferPools) {
assertNotNull(bufferPool);
assertTrue(Strings.hasText(bufferPool.getName()));
assertThat(bufferPool.getCount(), greaterThanOrEqualTo(0L));
assertNotNull(bufferPool.getTotalCapacity());
assertThat(bufferPool.getTotalCapacity().getBytes(), greaterThanOrEqualTo(0L));
assertNotNull(bufferPool.getUsed());
assertThat(bufferPool.getUsed().getBytes(), anyOf(equalTo(-1L), greaterThanOrEqualTo(0L)));
}
}
// Classes
JvmStats.Classes classes = stats.getClasses();
assertNotNull(classes);
assertThat(classes.getLoadedClassCount(), greaterThanOrEqualTo(0L));
assertThat(classes.getTotalLoadedClassCount(), greaterThanOrEqualTo(0L));
assertThat(classes.getUnloadedClassCount(), greaterThanOrEqualTo(0L));
}
}