001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase; 019 020import static org.junit.Assert.assertEquals; 021import static org.junit.Assert.assertTrue; 022 023import java.util.UUID; 024import org.apache.hadoop.fs.FileSystem; 025import org.apache.hadoop.fs.Path; 026import org.apache.hadoop.hbase.client.Put; 027import org.apache.hadoop.hbase.client.Table; 028import org.apache.hadoop.hbase.testclassification.MediumTests; 029import org.apache.hadoop.hbase.util.Bytes; 030import org.apache.hadoop.hdfs.MiniDFSCluster; 031import org.junit.ClassRule; 032import org.junit.Rule; 033import org.junit.Test; 034import org.junit.experimental.categories.Category; 035import org.junit.rules.TestName; 036 037/** 038 * Test that an HBase cluster can run on top of an existing MiniDfsCluster 039 */ 040@Category(MediumTests.class) 041public class TestHBaseOnOtherDfsCluster { 042 043 @ClassRule 044 public static final HBaseClassTestRule CLASS_RULE = 045 HBaseClassTestRule.forClass(TestHBaseOnOtherDfsCluster.class); 046 047 @Rule 048 public TestName name = new TestName(); 049 050 @Test 051 public void testOveralyOnOtherCluster() throws Exception { 052 // just run HDFS 053 HBaseTestingUtility util1 = new HBaseTestingUtility(); 054 MiniDFSCluster dfs = util1.startMiniDFSCluster(1); 055 056 // run HBase on that HDFS 057 HBaseTestingUtility util2 = new HBaseTestingUtility(); 058 // set the dfs 059 util2.setDFSCluster(dfs, false); 060 util2.startMiniCluster(); 061 062 //ensure that they are pointed at the same place 063 FileSystem fs = dfs.getFileSystem(); 064 FileSystem targetFs = util2.getDFSCluster().getFileSystem(); 065 assertFsSameUri(fs, targetFs); 066 067 fs = FileSystem.get(util1.getConfiguration()); 068 targetFs = FileSystem.get(util2.getConfiguration()); 069 assertFsSameUri(fs, targetFs); 070 071 Path randomFile = new Path("/"+UUID.randomUUID()); 072 assertTrue(targetFs.createNewFile(randomFile)); 073 assertTrue(fs.exists(randomFile)); 074 075 // do a simple create/write to ensure the cluster works as expected 076 byte[] family = Bytes.toBytes("testfamily"); 077 final TableName tablename = TableName.valueOf(name.getMethodName()); 078 Table table = util2.createTable(tablename, family); 079 Put p = new Put(new byte[] { 1, 2, 3 }); 080 p.addColumn(family, null, new byte[] { 1 }); 081 table.put(p); 082 083 // shutdown and make sure cleanly shutting down 084 util2.shutdownMiniCluster(); 085 util1.shutdownMiniDFSCluster(); 086 } 087 088 private void assertFsSameUri(FileSystem sourceFs, FileSystem targetFs) { 089 Path source = new Path(sourceFs.getUri()); 090 Path target = new Path(targetFs.getUri()); 091 assertEquals(source, target); 092 } 093}