| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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.apache.hadoop.hdfs.server.namenode.snapshot; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.lang.management.ManagementFactory; |
| import java.lang.reflect.Array; |
| |
| import javax.management.MBeanServer; |
| import javax.management.ObjectName; |
| import javax.management.openmbean.CompositeData; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.DistributedFileSystem; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.junit.Test; |
| |
| public class TestSnapshotStatsMXBean { |
| |
| /** |
| * Test getting SnapshotStatsMXBean information |
| */ |
| @Test |
| public void testSnapshotStatsMXBeanInfo() throws Exception { |
| Configuration conf = new Configuration(); |
| MiniDFSCluster cluster = null; |
| String pathName = "/snapshot"; |
| Path path = new Path(pathName); |
| |
| try { |
| cluster = new MiniDFSCluster.Builder(conf).build(); |
| cluster.waitActive(); |
| |
| SnapshotManager sm = cluster.getNamesystem().getSnapshotManager(); |
| DistributedFileSystem dfs = (DistributedFileSystem) cluster.getFileSystem(); |
| dfs.mkdirs(path); |
| dfs.allowSnapshot(path); |
| dfs.createSnapshot(path); |
| |
| MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); |
| ObjectName mxbeanName = new ObjectName( |
| "Hadoop:service=NameNode,name=SnapshotInfo"); |
| |
| CompositeData[] directories = |
| (CompositeData[]) mbs.getAttribute( |
| mxbeanName, "SnapshottableDirectories"); |
| int numDirectories = Array.getLength(directories); |
| assertEquals(sm.getNumSnapshottableDirs(), numDirectories); |
| CompositeData[] snapshots = |
| (CompositeData[]) mbs.getAttribute(mxbeanName, "Snapshots"); |
| int numSnapshots = Array.getLength(snapshots); |
| assertEquals(sm.getNumSnapshots(), numSnapshots); |
| |
| CompositeData d = (CompositeData) Array.get(directories, 0); |
| CompositeData s = (CompositeData) Array.get(snapshots, 0); |
| assertTrue(((String) d.get("path")).contains(pathName)); |
| assertTrue(((String) s.get("snapshotDirectory")).contains(pathName)); |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| } |