MessageFilterTests.java

/*
 * Copyright 2002-2010 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.integration.filter;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import org.junit.Test;

import org.springframework.integration.MessageRejectedException;
import org.springframework.integration.channel.DirectChannel;
import org.springframework.integration.channel.QueueChannel;
import org.springframework.integration.endpoint.EventDrivenConsumer;
import org.springframework.messaging.Message;
import org.springframework.messaging.support.GenericMessage;

/**
 * @author Mark Fisher
 */
public class MessageFilterTests {

	@Test
	public void filterAcceptsMessage() {
		MessageFilter filter = new MessageFilter(message -> true);
		Message<?> message = new GenericMessage<String>("test");
		QueueChannel output = new QueueChannel();
		filter.setOutputChannel(output);
		filter.handleMessage(message);
		Message<?> received = output.receive(0);
		assertEquals(message.getPayload(), received.getPayload());
		assertEquals(message.getHeaders().getId(), received.getHeaders().getId());
	}

	@Test
	public void filterRejectsMessageSilently() {
		MessageFilter filter = new MessageFilter(message -> false);
		QueueChannel output = new QueueChannel();
		filter.setOutputChannel(output);
		filter.handleMessage(new GenericMessage<String>("test"));
		assertNull(output.receive(0));
	}

	@Test(expected = MessageRejectedException.class)
	public void filterThrowsException() {
		MessageFilter filter = new MessageFilter(message -> false);
		filter.setThrowExceptionOnRejection(true);
		QueueChannel output = new QueueChannel();
		filter.setOutputChannel(output);
		filter.handleMessage(new GenericMessage<String>("test"));
	}

	@Test
	public void filterAcceptsWithChannels() {
		DirectChannel inputChannel = new DirectChannel();
		QueueChannel outputChannel = new QueueChannel();
		MessageFilter filter = new MessageFilter(message -> true);
		filter.setOutputChannel(outputChannel);
		EventDrivenConsumer endpoint = new EventDrivenConsumer(inputChannel, filter);
		endpoint.start();
		Message<?> message = new GenericMessage<String>("test");
		assertTrue(inputChannel.send(message));
		Message<?> reply = outputChannel.receive(0);
		assertNotNull(reply);
		assertEquals(message.getPayload(), reply.getPayload());
	}

	@Test
	public void filterRejectsSilentlyWithChannels() {
		DirectChannel inputChannel = new DirectChannel();
		QueueChannel outputChannel = new QueueChannel();
		MessageFilter filter = new MessageFilter(message -> false);
		filter.setOutputChannel(outputChannel);
		EventDrivenConsumer endpoint = new EventDrivenConsumer(inputChannel, filter);
		endpoint.start();
		Message<?> message = new GenericMessage<String>("test");
		assertTrue(inputChannel.send(message));
		assertNull(outputChannel.receive(0));
	}

	@Test(expected = MessageRejectedException.class)
	public void filterThrowsExceptionWithChannels() {
		DirectChannel inputChannel = new DirectChannel();
		QueueChannel outputChannel = new QueueChannel();
		MessageFilter filter = new MessageFilter(message -> false);
		filter.setOutputChannel(outputChannel);
		filter.setThrowExceptionOnRejection(true);
		EventDrivenConsumer endpoint = new EventDrivenConsumer(inputChannel, filter);
		endpoint.start();
		Message<?> message = new GenericMessage<String>("test");
		assertTrue(inputChannel.send(message));
	}

	@Test
	public void filterDiscardsMessage() {
		DirectChannel inputChannel = new DirectChannel();
		QueueChannel outputChannel = new QueueChannel();
		QueueChannel discardChannel = new QueueChannel();
		MessageFilter filter = new MessageFilter(message -> false);
		filter.setOutputChannel(outputChannel);
		filter.setDiscardChannel(discardChannel);
		EventDrivenConsumer endpoint = new EventDrivenConsumer(inputChannel, filter);
		endpoint.start();
		Message<?> message = new GenericMessage<String>("test");
		assertTrue(inputChannel.send(message));
		Message<?> reply = discardChannel.receive(0);
		assertNotNull(reply);
		assertEquals(message, reply);
		assertNull(outputChannel.receive(0));
	}

	@Test(expected = MessageRejectedException.class)
	public void filterDiscardsMessageAndThrowsException() throws Exception {
		DirectChannel inputChannel = new DirectChannel();
		QueueChannel outputChannel = new QueueChannel();
		QueueChannel discardChannel = new QueueChannel();
		MessageFilter filter = new MessageFilter(message -> false);
		filter.setOutputChannel(outputChannel);
		filter.setDiscardChannel(discardChannel);
		filter.setThrowExceptionOnRejection(true);
		EventDrivenConsumer endpoint = new EventDrivenConsumer(inputChannel, filter);
		endpoint.start();
		Message<?> message = new GenericMessage<String>("test");
		try {
			assertTrue(inputChannel.send(message));
		}
		catch (Exception e) {
			throw e;
		}
		finally {
			Message<?> reply = discardChannel.receive(0);
			assertNotNull(reply);
			assertEquals(message, reply);
			assertNull(outputChannel.receive(0));
		}

	}

}