com.taobao.adfs.distributed.DistributedLockerTest.java Source code

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Here is the source code for com.taobao.adfs.distributed.DistributedLockerTest.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 com.taobao.adfs.distributed;

import static org.hamcrest.Matchers.is;
import static org.junit.Assert.assertThat;

import org.apache.hadoop.conf.Configuration;
import org.apache.log4j.Level;
import org.junit.BeforeClass;
import org.junit.Test;

import com.taobao.adfs.distributed.DistributedDataVersion;
import com.taobao.adfs.distributed.DistributedLocker;
import com.taobao.adfs.distributed.DistributedLocker.DistributedLock;
import com.taobao.adfs.util.DeepArray;
import com.taobao.adfs.util.ReentrantReadWriteLockExtension;
import com.taobao.adfs.util.Utilities;

/**
 * @author <a href=mailto:zhangwei.yangjie@gmail.com/jiwan@taobao.com>zhangwei/jiwan</a>
 */
public class DistributedLockerTest {
    @BeforeClass
    public static void setupBeforeClass() throws Throwable {
        Utilities.configureLog4j(null, "distributed.logger.conf.", Level.DEBUG);
    }

    @Test
    public void unlockALockWhichUnlockedByOtherThread() throws Exception {
        Configuration conf = new Configuration(false);
        conf.setInt("distributed.locker.remove.expired.lock.interval", 1);
        ReentrantReadWriteLockExtension getDataLocker = new ReentrantReadWriteLockExtension();

        DistributedLocker locker = new DistributedLocker(conf, new DistributedDataVersion(), getDataLocker);
        assertThat(locker.lock("A", Long.MAX_VALUE, Long.MAX_VALUE, 1) != null, is(true));
        assertThat(locker.unlock("A", 1) != null, is(true));
        assertThat(locker.getLock(1) == null, is(true));
        assertThat(locker.lock("B", Long.MAX_VALUE, Long.MAX_VALUE, 1) != null, is(true));
        assertThat(locker.unlock("B", 1) != null, is(true));
        assertThat(locker.getLock(1) == null, is(true));

        // case: lock->unlock===>unlock-X->lock
        conf.setInt("distributed.locker.remove.expired.lock.interval", 1);
        assertThat(locker.unlockDirectly(
                new DistributedLock(new DeepArray(2), 0, "C", -locker.version.get() - 1, "C", false)) != null,
                is(true));
        assertThat(locker.getLock(2) != null, is(true));
        assertThat(locker.getLock(2).version == -locker.version.get(), is(true));
        conf.setInt("distributed.locker.remove.expired.lock.delay.time", 0);
        locker.lock("A", Long.MAX_VALUE, Long.MAX_VALUE, 1);
        locker.unlock("A", 1);
        assertThat(locker.getLock(2) == null, is(true));
        conf.setInt("distributed.locker.remove.expired.lock.delay.time", 600000);
    }
}