modules/core/src/test/java/org/apache/ignite/internal/processors/cache/distributed/CacheTryLockMultithreadedTest.java

/*
 * 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.ignite.internal.processors.cache.distributed;

import java.util.concurrent.Callable;
import java.util.concurrent.locks.Lock;
import org.apache.ignite.Ignite;
import org.apache.ignite.IgniteCache;
import org.apache.ignite.configuration.CacheConfiguration;
import org.apache.ignite.configuration.IgniteConfiguration;
import org.apache.ignite.testframework.GridTestUtils;
import org.apache.ignite.testframework.MvccFeatureChecker;
import org.apache.ignite.testframework.junits.common.GridCommonAbstractTest;
import org.junit.Test;

import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static org.apache.ignite.cache.CacheAtomicityMode.TRANSACTIONAL;
import static org.apache.ignite.cache.CacheMode.REPLICATED;
import static org.apache.ignite.cache.CacheWriteSynchronizationMode.FULL_SYNC;

/**
 *
 */
public class CacheTryLockMultithreadedTest extends GridCommonAbstractTest {
    /** */
    private static final int SRVS = 2;

    /** {@inheritDoc} */
    @Override protected IgniteConfiguration getConfiguration(String igniteInstanceName) throws Exception {
        IgniteConfiguration cfg = super.getConfiguration(igniteInstanceName);

        CacheConfiguration<Integer, Integer> ccfg = new CacheConfiguration<>(DEFAULT_CACHE_NAME);

        ccfg.setAtomicityMode(TRANSACTIONAL);
        ccfg.setWriteSynchronizationMode(FULL_SYNC);
        ccfg.setCacheMode(REPLICATED);

        cfg.setCacheConfiguration(ccfg);

        return cfg;
    }

    /** {@inheritDoc} */
    @Override protected void beforeTestsStarted() throws Exception {
        super.beforeTestsStarted();

        startGridsMultiThreaded(SRVS);

        startClientGrid(SRVS);
    }

    /** {@inheritDoc} */
    @Override protected void beforeTest() throws Exception {
        MvccFeatureChecker.skipIfNotSupported(MvccFeatureChecker.Feature.ENTRY_LOCK);
    }

    /**
     * @throws Exception If failed.
     */
    @Test
    public void testTryLock() throws Exception {
        Ignite client = grid(SRVS);

        final Integer key = 1;

        final IgniteCache<Integer, Integer> cache = client.cache(DEFAULT_CACHE_NAME);

        final long stopTime = System.currentTimeMillis() + 30_000;

        GridTestUtils.runMultiThreaded(new Callable<Void>() {
            @Override public Void call() throws Exception {
                Lock lock = cache.lock(key);

                while (System.currentTimeMillis() < stopTime) {
                    for (int i = 0; i < 1000; i++) {
                        boolean locked = lock.tryLock(100, MILLISECONDS);

                        if (locked)
                            lock.unlock();
                    }
                }

                return null;
            }
        }, 20, "lock-thread");
    }
}