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.coprocessor;
019
020import static org.junit.Assert.assertEquals;
021import static org.junit.Assert.assertFalse;
022import static org.junit.Assert.assertTrue;
023
024import java.io.IOException;
025import org.apache.hadoop.hbase.HBaseClassTestRule;
026import org.apache.hadoop.hbase.HBaseTestingUtil;
027import org.apache.hadoop.hbase.master.MasterCoprocessorHost;
028import org.apache.hadoop.hbase.master.MasterServices;
029import org.apache.hadoop.hbase.master.assignment.MockMasterServices;
030import org.apache.hadoop.hbase.testclassification.CoprocessorTests;
031import org.apache.hadoop.hbase.testclassification.SmallTests;
032import org.junit.After;
033import org.junit.Before;
034import org.junit.ClassRule;
035import org.junit.Rule;
036import org.junit.Test;
037import org.junit.experimental.categories.Category;
038import org.junit.rules.TestName;
039
040/**
041 * Test CoreCoprocessor Annotation works giving access to facility not usually available.
042 * Test MasterCoprocessor.
043 */
044@Category({CoprocessorTests.class, SmallTests.class})
045public class TestCoreMasterCoprocessor {
046  @ClassRule
047  public static final HBaseClassTestRule CLASS_RULE =
048      HBaseClassTestRule.forClass(TestCoreMasterCoprocessor.class);
049
050  @Rule public TestName name = new TestName();
051  private static final HBaseTestingUtil HTU = new HBaseTestingUtil();
052  private MasterServices ms;
053  private MasterCoprocessorHost mch;
054
055  @Before
056  public void before() throws IOException {
057    String methodName = this.name.getMethodName();
058    this.ms = new MockMasterServices(HTU.getConfiguration(), null);
059    this.mch = new MasterCoprocessorHost(this.ms, HTU.getConfiguration());
060    this.mch.preMasterInitialization();
061  }
062
063  @After
064  public void after() throws IOException {
065    this.mch.preStopMaster();
066  }
067
068  /**
069   * No annotation with CoreCoprocessor. This should make it so I can NOT get at instance of a
070   * MasterServices instance after some gymnastics.
071   */
072  public static class NotCoreMasterCoprocessor implements MasterCoprocessor {
073    public NotCoreMasterCoprocessor() {}
074  }
075
076  /**
077   * Annotate with CoreCoprocessor. This should make it so I can get at instance of a
078   * MasterServices instance after some gymnastics.
079   */
080  @CoreCoprocessor
081  public static class CoreMasterCoprocessor implements MasterCoprocessor {
082    public CoreMasterCoprocessor() {}
083  }
084
085  /**
086   * Assert that when a Coprocessor is annotated with CoreCoprocessor, then it is possible to
087   * access a MasterServices instance. Assert the opposite too.
088   * Do it to MasterCoprocessors.
089   * @throws IOException
090   */
091  @Test
092  public void testCoreRegionCoprocessor() throws IOException {
093    MasterCoprocessorEnvironment env =
094        this.mch.load(null, NotCoreMasterCoprocessor.class.getName(), 0, HTU.getConfiguration());
095    assertFalse(env instanceof HasMasterServices);
096    env = this.mch.load(null, CoreMasterCoprocessor.class.getName(), 1, HTU.getConfiguration());
097    assertTrue(env instanceof HasMasterServices);
098    assertEquals(this.ms, ((HasMasterServices)env).getMasterServices());
099  }
100}