com.shigengyu.hyperion.scenarios.concurrent.TransitionParameterSetTest.java Source code

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Here is the source code for com.shigengyu.hyperion.scenarios.concurrent.TransitionParameterSetTest.java

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/*******************************************************************************
 * Copyright 2013-2014 Gengyu Shi
 *
 * 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.shigengyu.hyperion.scenarios.concurrent;

import java.lang.Thread.UncaughtExceptionHandler;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.apache.commons.lang.exception.ExceptionUtils;
import org.apache.commons.lang.math.RandomUtils;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.google.common.collect.Lists;
import com.shigengyu.hyperion.core.TransitionParameterSet;
import com.shigengyu.hyperion.environment.TestEnvironment;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(TestEnvironment.APPLICATION_CONTEXT_CONFIG)
public class TransitionParameterSetTest {

    private static class SetAndGetThread extends Thread {

        private final TransitionParameterSet parameters;

        private SetAndGetThread(TransitionParameterSet parameters) {
            this.parameters = parameters;
        }

        @Override
        public void run() {
            for (int i = 0; i <= NUM_OF_THREADS; i++) {
                try {
                    String parameterKey = Thread.currentThread().getName() + "_number";
                    int number = RandomUtils.nextInt();
                    parameters.set(parameterKey, number);
                    Thread.sleep(RandomUtils.nextInt(5));
                    Assert.assertEquals(number, parameters.get(Integer.class, parameterKey).intValue());
                } catch (InterruptedException e) {
                    Assert.fail(ExceptionUtils.getFullStackTrace(e));
                }
            }
        }
    }

    private static class ThreadUncaughtExceptionHandler implements UncaughtExceptionHandler {

        private final List<Throwable> exceptions = Lists.newArrayList();

        public List<Throwable> getExceptions() {
            return exceptions;
        }

        @Override
        public void uncaughtException(Thread t, Throwable e) {
            exceptions.add(e);
        }
    }

    public static final int NUM_OF_THREADS = 10;

    @Test
    public void setAndGetParameterValues() {
        TransitionParameterSet parameters = TransitionParameterSet.create();

        ThreadUncaughtExceptionHandler exceptionHandler = new ThreadUncaughtExceptionHandler();
        Thread.setDefaultUncaughtExceptionHandler(exceptionHandler);

        Set<Thread> threads = new HashSet<Thread>();

        for (int i = 0; i < NUM_OF_THREADS; i++) {
            SetAndGetThread thread = new SetAndGetThread(parameters);
            thread.start();
            threads.add(thread);
        }

        for (Thread thread : threads) {
            try {
                thread.join();
            } catch (InterruptedException e) {
                Assert.fail(ExceptionUtils.getFullStackTrace(e));
            }
        }

        if (exceptionHandler.getExceptions().size() > 0) {
            ExceptionUtils.getFullStackTrace(exceptionHandler.getExceptions().get(0));
        }
    }
}