org.springframework.messaging.simp.broker.OrderedMessageSenderTests.java Source code

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Here is the source code for org.springframework.messaging.simp.broker.OrderedMessageSenderTests.java

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/*
 * Copyright 2002-2018 the original author or authors.
 *
 * 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 org.springframework.messaging.simp.broker;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import org.springframework.messaging.simp.SimpMessageHeaderAccessor;
import org.springframework.messaging.simp.SimpMessageType;
import org.springframework.messaging.support.ExecutorSubscribableChannel;
import org.springframework.messaging.support.MessageBuilder;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import static org.junit.Assert.*;

/**
 * Unit tests for {@link OrderedMessageSender}.
 * @author Rossen Stoyanchev
 */
public class OrderedMessageSenderTests {

    private static final Log logger = LogFactory.getLog(OrderedMessageSenderTests.class);

    private OrderedMessageSender sender;

    ExecutorSubscribableChannel channel = new ExecutorSubscribableChannel(this.executor);

    private ThreadPoolTaskExecutor executor;

    @Before
    public void setup() {
        this.executor = new ThreadPoolTaskExecutor();
        this.executor.setCorePoolSize(Runtime.getRuntime().availableProcessors() * 2);
        this.executor.setAllowCoreThreadTimeOut(true);
        this.executor.afterPropertiesSet();

        this.channel = new ExecutorSubscribableChannel(this.executor);
        OrderedMessageSender.configureOutboundChannel(this.channel, true);

        this.sender = new OrderedMessageSender(this.channel, logger);

    }

    @After
    public void tearDown() {
        this.executor.shutdown();
    }

    @Test
    public void test() throws InterruptedException {

        int start = 1;
        int end = 1000;

        AtomicInteger index = new AtomicInteger(start);
        AtomicReference<Object> result = new AtomicReference<>();
        CountDownLatch latch = new CountDownLatch(1);

        this.channel.subscribe(message -> {
            int expected = index.getAndIncrement();
            Integer actual = (Integer) message.getHeaders().getOrDefault("seq", -1);
            if (actual != expected) {
                result.set("Expected: " + expected + ", but was: " + actual);
                latch.countDown();
                return;
            }
            if (actual == 100 || actual == 200) {
                try {
                    Thread.sleep(200);
                } catch (InterruptedException ex) {
                    result.set(ex.toString());
                    latch.countDown();
                }
            }
            if (actual == end) {
                result.set("Done");
                latch.countDown();
            }
        });

        for (int i = start; i <= end; i++) {
            SimpMessageHeaderAccessor accessor = SimpMessageHeaderAccessor.create(SimpMessageType.MESSAGE);
            accessor.setHeader("seq", i);
            accessor.setLeaveMutable(true);
            this.sender.send(MessageBuilder.createMessage("payload", accessor.getMessageHeaders()));
        }

        latch.await(10, TimeUnit.SECONDS);
        assertEquals("Done", result.get());
    }

}