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.procedure2;
019
020import static org.junit.Assert.assertFalse;
021import static org.junit.Assert.assertTrue;
022
023import java.io.IOException;
024import java.util.concurrent.CountDownLatch;
025import java.util.concurrent.TimeUnit;
026import org.apache.hadoop.hbase.HBaseClassTestRule;
027import org.apache.hadoop.hbase.HBaseCommonTestingUtil;
028import org.apache.hadoop.hbase.procedure2.store.NoopProcedureStore;
029import org.apache.hadoop.hbase.testclassification.MasterTests;
030import org.apache.hadoop.hbase.testclassification.SmallTests;
031import org.junit.After;
032import org.junit.Before;
033import org.junit.ClassRule;
034import org.junit.Test;
035import org.junit.experimental.categories.Category;
036import org.slf4j.Logger;
037import org.slf4j.LoggerFactory;
038
039@Category({ MasterTests.class, SmallTests.class })
040public class TestProcedureInMemoryChore {
041
042  @ClassRule
043  public static final HBaseClassTestRule CLASS_RULE =
044    HBaseClassTestRule.forClass(TestProcedureInMemoryChore.class);
045
046  private static final Logger LOG = LoggerFactory.getLogger(TestProcedureInMemoryChore.class);
047
048  private static final int PROCEDURE_EXECUTOR_SLOTS = 1;
049
050  private TestProcEnv procEnv;
051  private NoopProcedureStore procStore;
052  private ProcedureExecutor<TestProcEnv> procExecutor;
053
054  private HBaseCommonTestingUtil htu;
055
056  @Before
057  public void setUp() throws IOException {
058    htu = new HBaseCommonTestingUtil();
059
060    procEnv = new TestProcEnv();
061    procStore = new NoopProcedureStore();
062    procExecutor = new ProcedureExecutor<>(htu.getConfiguration(), procEnv, procStore);
063    procExecutor.testing = new ProcedureExecutor.Testing();
064    procStore.start(PROCEDURE_EXECUTOR_SLOTS);
065    ProcedureTestingUtility.initAndStartWorkers(procExecutor, PROCEDURE_EXECUTOR_SLOTS, true);
066  }
067
068  @After
069  public void tearDown() throws IOException {
070    procExecutor.stop();
071    procStore.stop(false);
072  }
073
074  @Test
075  public void testChoreAddAndRemove() throws Exception {
076    final int timeoutMSec = 50;
077    final int nCountDown = 5;
078
079    // submit the chore and wait for execution
080    CountDownLatch latch = new CountDownLatch(nCountDown);
081    TestLatchChore chore = new TestLatchChore(timeoutMSec, latch);
082    procExecutor.addChore(chore);
083    assertTrue(chore.isWaiting());
084    latch.await();
085
086    // remove the chore and verify it is no longer executed
087    assertTrue(chore.isWaiting());
088    procExecutor.removeChore(chore);
089    latch = new CountDownLatch(nCountDown);
090    chore.setLatch(latch);
091    latch.await(timeoutMSec * nCountDown, TimeUnit.MILLISECONDS);
092    LOG.info("chore latch count=" + latch.getCount());
093    assertFalse(chore.isWaiting());
094    assertTrue("latchCount=" + latch.getCount(), latch.getCount() > 0);
095  }
096
097  public static class TestLatchChore extends ProcedureInMemoryChore<TestProcEnv> {
098    private CountDownLatch latch;
099
100    public TestLatchChore(final int timeoutMSec, final CountDownLatch latch) {
101      super(timeoutMSec);
102      setLatch(latch);
103    }
104
105    public void setLatch(final CountDownLatch latch) {
106      this.latch = latch;
107    }
108
109    @Override
110    protected void periodicExecute(final TestProcEnv env) {
111      LOG.info("periodic execute " + this);
112      latch.countDown();
113    }
114  }
115
116  private static class TestProcEnv {
117  }
118}