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.MockRegionServerServices;
028import org.apache.hadoop.hbase.regionserver.RegionServerCoprocessorHost;
029import org.apache.hadoop.hbase.regionserver.RegionServerServices;
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 RegionServerCoprocessor.
043 */
044@Category({CoprocessorTests.class, SmallTests.class})
045public class TestCoreRegionServerCoprocessor {
046
047  @ClassRule
048  public static final HBaseClassTestRule CLASS_RULE =
049      HBaseClassTestRule.forClass(TestCoreRegionServerCoprocessor.class);
050
051  @Rule public TestName name = new TestName();
052  private static final HBaseTestingUtility HTU = HBaseTestingUtility.createLocalHTU();
053  private RegionServerServices rss;
054  private RegionServerCoprocessorHost rsch;
055
056  @Before
057  public void before() throws IOException {
058    String methodName = this.name.getMethodName();
059    this.rss = new MockRegionServerServices(HTU.getConfiguration());
060    this.rsch = new RegionServerCoprocessorHost(this.rss, HTU.getConfiguration());
061  }
062
063  @After
064  public void after() throws IOException {
065    this.rsch.preStop("Stopping", null);
066  }
067
068  /**
069   * No annotation with CoreCoprocessor. This should make it so I can NOT get at instance of a
070   * RegionServerServices instance after some gymnastics.
071   */
072  public static class NotCoreRegionServerCoprocessor implements RegionServerCoprocessor {
073    public NotCoreRegionServerCoprocessor() {}
074  }
075
076  /**
077   * Annotate with CoreCoprocessor. This should make it so I can get at instance of a
078   * RegionServerServices instance after some gymnastics.
079   */
080  @CoreCoprocessor
081  public static class CoreRegionServerCoprocessor implements RegionServerCoprocessor {
082    public CoreRegionServerCoprocessor() {}
083  }
084
085  /**
086   * Assert that when a Coprocessor is annotated with CoreCoprocessor, then it is possible to
087   * access a RegionServerServices instance. Assert the opposite too.
088   * Do it to RegionServerCoprocessors.
089   * @throws IOException
090   */
091  @Test
092  public void testCoreRegionCoprocessor() throws IOException {
093    RegionServerCoprocessorEnvironment env =
094        rsch.load(null, NotCoreRegionServerCoprocessor.class.getName(), 0, HTU.getConfiguration());
095    assertFalse(env instanceof HasRegionServerServices);
096    env = rsch.load(null, CoreRegionServerCoprocessor.class.getName(), 1, HTU.getConfiguration());
097    assertTrue(env instanceof HasRegionServerServices);
098    assertEquals(this.rss, ((HasRegionServerServices)env).getRegionServerServices());
099  }
100}