com.hazelcast.simulator.tests.concurrent.lock.SimpleLockTest Maven / Gradle / Ivy

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/*
 * Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
 *
 * Licensed 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.hazelcast.simulator.tests.concurrent.lock;

import com.hazelcast.core.IAtomicLong;
import com.hazelcast.core.ILock;
import com.hazelcast.simulator.test.AbstractTest;
import com.hazelcast.simulator.test.BaseThreadState;
import com.hazelcast.simulator.test.annotations.TimeStep;
import com.hazelcast.simulator.test.annotations.Verify;
import com.hazelcast.simulator.test.annotations.Warmup;

import static java.lang.String.format;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

public class SimpleLockTest extends AbstractTest {

    private static final int INITIAL_VALUE = 1000;

    public int maxAccounts = 7;

    private int totalValue = 0;

    @Warmup(global = true)
    public void warmup() {
        for (int i = 0; i < maxAccounts; i++) {
            IAtomicLong account = targetInstance.getAtomicLong(name + i);
            account.set(INITIAL_VALUE);
        }
        totalValue = INITIAL_VALUE * maxAccounts;
    }

    @TimeStep
    public void timeStep(BaseThreadState state) {
        int key1 = state.randomInt(maxAccounts);
        int key2;
        do {
            key2 = state.randomInt(maxAccounts);
        } while (key1 == key2);

        ILock lock1 = targetInstance.getLock(name + key1);
        if (lock1.tryLock()) {
            try {
                ILock lock2 = targetInstance.getLock(name + key2);
                if (lock2.tryLock()) {
                    try {
                        IAtomicLong account1 = targetInstance.getAtomicLong(name + key1);
                        IAtomicLong account2 = targetInstance.getAtomicLong(name + key2);

                        int delta = state.randomInt(100);
                        if (account1.get() >= delta) {
                            account1.set(account1.get() - delta);
                            account2.set(account2.get() + delta);
                        }
                    } finally {
                        lock2.unlock();
                    }
                }
            } finally {
                lock1.unlock();
            }
        }
    }

    @Verify
    public void verify() {
        int value = 0;
        for (int i = 0; i < maxAccounts; i++) {
            ILock lock = targetInstance.getLock(name + i);
            IAtomicLong account = targetInstance.getAtomicLong(name + i);

            logger.info(format("%s %d", account, account.get()));

            assertFalse(name + ": Lock should be unlocked", lock.isLocked());
            assertTrue(name + ": Amount is < 0 ", account.get() >= 0);
            value += account.get();
        }
        assertEquals(name + " totals not adding up ", totalValue, value);
    }

}