hazelcast-master/hazelcast/src/test/java/com/hazelcast/map/MapPutDestroyTest.java
/*
 * Copyright (c) 2008-2023, 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.map;

import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.test.HazelcastParallelClassRunner;
import com.hazelcast.test.HazelcastTestSupport;
import com.hazelcast.test.annotation.NightlyTest;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicReference;

import static junit.framework.TestCase.fail;

@RunWith(HazelcastParallelClassRunner.class)
@Category(NightlyTest.class)
public class MapPutDestroyTest extends HazelcastTestSupport {

    @Test
    public void testConcurrentPutDestroy_doesNotCauseNPE() {
        final HazelcastInstance instance = createHazelcastInstance(getConfig());
        final String name = randomString();
        final AtomicReference<Throwable> error = new AtomicReference<Throwable>(null);

        final AtomicBoolean stop = new AtomicBoolean();

        Thread t1 = new Thread(
                new Runnable() {
                    @Override
                    public void run() {
                        try {
                            while (!stop.get()) {
                                IMap<Object, Object> map = instance.getMap(name);
                                map.put(System.currentTimeMillis(), Boolean.TRUE);
                            }
                        } catch (Throwable e) {
                            error.set(e);
                        }
                    }
                }
        );

        Thread t2 = new Thread(
                new Runnable() {
                    @Override
                    public void run() {
                        try {
                            while (!stop.get()) {
                                IMap<Object, Object> map = instance.getMap(name);
                                map.destroy();
                            }
                        } catch (Throwable e) {
                            error.set(e);
                        }
                    }
                }
        );

        t1.start();
        t2.start();

        sleepSeconds(10);
        stop.set(true);

        try {
            t1.join();
        } catch (Throwable e) {
            e.printStackTrace();
        }

        try {
            t2.join();
        } catch (Throwable e) {
            e.printStackTrace();
        }

        Throwable object = error.get();

        if (object != null) {
            object.printStackTrace(System.out);
            fail(object.getMessage());
        }
    }
}
