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.HBaseTestingUtility;
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
047  @ClassRule
048  public static final HBaseClassTestRule CLASS_RULE =
049      HBaseClassTestRule.forClass(TestCoreMasterCoprocessor.class);
050
051  @Rule public TestName name = new TestName();
052  private static final HBaseTestingUtility HTU = HBaseTestingUtility.createLocalHTU();
053  private MasterServices ms;
054  private MasterCoprocessorHost mch;
055
056  @Before
057  public void before() throws IOException {
058    String methodName = this.name.getMethodName();
059    this.ms = new MockMasterServices(HTU.getConfiguration(), null);
060    this.mch = new MasterCoprocessorHost(this.ms, HTU.getConfiguration());
061    this.mch.preMasterInitialization();
062  }
063
064  @After
065  public void after() throws IOException {
066    this.mch.preStopMaster();
067  }
068
069  /**
070   * No annotation with CoreCoprocessor. This should make it so I can NOT get at instance of a
071   * MasterServices instance after some gymnastics.
072   */
073  public static class NotCoreMasterCoprocessor implements MasterCoprocessor {
074    public NotCoreMasterCoprocessor() {}
075  }
076
077  /**
078   * Annotate with CoreCoprocessor. This should make it so I can get at instance of a
079   * MasterServices instance after some gymnastics.
080   */
081  @CoreCoprocessor
082  public static class CoreMasterCoprocessor implements MasterCoprocessor {
083    public CoreMasterCoprocessor() {}
084  }
085
086  /**
087   * Assert that when a Coprocessor is annotated with CoreCoprocessor, then it is possible to
088   * access a MasterServices instance. Assert the opposite too.
089   * Do it to MasterCoprocessors.
090   * @throws IOException
091   */
092  @Test
093  public void testCoreRegionCoprocessor() throws IOException {
094    MasterCoprocessorEnvironment env =
095        this.mch.load(null, NotCoreMasterCoprocessor.class.getName(), 0, HTU.getConfiguration());
096    assertFalse(env instanceof HasMasterServices);
097    env = this.mch.load(null, CoreMasterCoprocessor.class.getName(), 1, HTU.getConfiguration());
098    assertTrue(env instanceof HasMasterServices);
099    assertEquals(this.ms, ((HasMasterServices)env).getMasterServices());
100  }
101}