org.apache.hadoop.hbase.procedure2.TestProcedureInMemoryChore.java Source code

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Here is the source code for org.apache.hadoop.hbase.procedure2.TestProcedureInMemoryChore.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.hbase.procedure2;

import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.HBaseCommonTestingUtility;
import org.apache.hadoop.hbase.procedure2.store.NoopProcedureStore;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.testclassification.MasterTests;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

@Category({ MasterTests.class, SmallTests.class })
public class TestProcedureInMemoryChore {
    private static final Log LOG = LogFactory.getLog(TestProcedureInMemoryChore.class);

    private static final int PROCEDURE_EXECUTOR_SLOTS = 1;

    private TestProcEnv procEnv;
    private NoopProcedureStore procStore;
    private ProcedureExecutor<TestProcEnv> procExecutor;

    private HBaseCommonTestingUtility htu;

    @Before
    public void setUp() throws IOException {
        htu = new HBaseCommonTestingUtility();

        procEnv = new TestProcEnv();
        procStore = new NoopProcedureStore();
        procExecutor = new ProcedureExecutor(htu.getConfiguration(), procEnv, procStore);
        procExecutor.testing = new ProcedureExecutor.Testing();
        procStore.start(PROCEDURE_EXECUTOR_SLOTS);
        procExecutor.start(PROCEDURE_EXECUTOR_SLOTS, true);
    }

    @After
    public void tearDown() throws IOException {
        procExecutor.stop();
        procStore.stop(false);
    }

    @Test
    public void testChoreAddAndRemove() throws Exception {
        final int timeoutMSec = 50;
        final int nCountDown = 5;

        // submit the chore and wait for execution
        CountDownLatch latch = new CountDownLatch(nCountDown);
        TestLatchChore chore = new TestLatchChore(timeoutMSec, latch);
        procExecutor.addChore(chore);
        assertTrue(chore.isRunnable());
        latch.await();

        // remove the chore and verify it is no longer executed
        assertTrue(chore.isRunnable());
        procExecutor.removeChore(chore);
        latch = new CountDownLatch(nCountDown);
        chore.setLatch(latch);
        latch.await(timeoutMSec * nCountDown, TimeUnit.MILLISECONDS);
        LOG.info("chore latch count=" + latch.getCount());
        assertFalse(chore.isRunnable());
        assertTrue("latchCount=" + latch.getCount(), latch.getCount() > 0);
    }

    public static class TestLatchChore extends ProcedureInMemoryChore<TestProcEnv> {
        private CountDownLatch latch;

        public TestLatchChore(final int timeoutMSec, final CountDownLatch latch) {
            super(timeoutMSec);
            setLatch(latch);
        }

        public void setLatch(final CountDownLatch latch) {
            this.latch = latch;
        }

        @Override
        protected void periodicExecute(final TestProcEnv env) {
            latch.countDown();
        }
    }

    private static class TestProcEnv {
    }
}