Implemented CharacterStreamTargetAdapter and added CharacterStreamTargetAdapterTests.
This commit is contained in:
Mark Fisher
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/*
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* Copyright 2002-2007 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.integration.adapter.stream;
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import static org.junit.Assert.assertEquals;
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import java.io.ByteArrayOutputStream;
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import org.junit.Test;
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import org.springframework.integration.bus.ChannelPollingMessageRetriever;
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import org.springframework.integration.bus.ConsumerPolicy;
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import org.springframework.integration.bus.DefaultMessageDispatcher;
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import org.springframework.integration.channel.MessageChannel;
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import org.springframework.integration.channel.SimpleChannel;
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import org.springframework.integration.message.GenericMessage;
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import org.springframework.integration.message.StringMessage;
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/**
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* @author Mark Fisher
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*/
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public class CharacterStreamTargetAdapterTests {
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@Test
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public void testSingleString() {
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ByteArrayOutputStream stream = new ByteArrayOutputStream();
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MessageChannel channel = new SimpleChannel();
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CharacterStreamTargetAdapter adapter = new CharacterStreamTargetAdapter(stream);
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adapter.setChannel(channel);
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ConsumerPolicy policy = ConsumerPolicy.newEventDrivenPolicy();
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ChannelPollingMessageRetriever retriever = new ChannelPollingMessageRetriever(channel, policy);
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DefaultMessageDispatcher dispatcher = new DefaultMessageDispatcher(retriever);
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dispatcher.addHandler(adapter);
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dispatcher.start();
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channel.send(new StringMessage("foo"));
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int count = dispatcher.dispatch();
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assertEquals(1, count);
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String result = new String(stream.toByteArray());
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assertEquals("foo", result);
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}
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@Test
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public void testTwoStringsAndNoNewLinesByDefault() {
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ByteArrayOutputStream stream = new ByteArrayOutputStream();
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MessageChannel channel = new SimpleChannel();
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CharacterStreamTargetAdapter adapter = new CharacterStreamTargetAdapter(stream);
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adapter.setChannel(channel);
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ConsumerPolicy policy = ConsumerPolicy.newEventDrivenPolicy();
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ChannelPollingMessageRetriever retriever = new ChannelPollingMessageRetriever(channel, policy);
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DefaultMessageDispatcher dispatcher = new DefaultMessageDispatcher(retriever);
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dispatcher.addHandler(adapter);
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dispatcher.start();
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channel.send(new StringMessage("foo"));
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channel.send(new StringMessage("bar"));
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assertEquals(1, dispatcher.dispatch());
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String result1 = new String(stream.toByteArray());
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assertEquals("foo", result1);
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assertEquals(1, dispatcher.dispatch());
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String result2 = new String(stream.toByteArray());
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assertEquals("foobar", result2);
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}
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@Test
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public void testTwoStringsWithNewLines() {
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ByteArrayOutputStream stream = new ByteArrayOutputStream();
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MessageChannel channel = new SimpleChannel();
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CharacterStreamTargetAdapter adapter = new CharacterStreamTargetAdapter(stream);
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adapter.setChannel(channel);
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adapter.setShouldAppendNewLine(true);
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ConsumerPolicy policy = ConsumerPolicy.newEventDrivenPolicy();
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ChannelPollingMessageRetriever retriever = new ChannelPollingMessageRetriever(channel, policy);
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DefaultMessageDispatcher dispatcher = new DefaultMessageDispatcher(retriever);
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dispatcher.addHandler(adapter);
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dispatcher.start();
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channel.send(new StringMessage("foo"));
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channel.send(new StringMessage("bar"));
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assertEquals(1, dispatcher.dispatch());
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String result1 = new String(stream.toByteArray());
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String newLine = System.getProperty("line.separator");
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assertEquals("foo" + newLine, result1);
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assertEquals(1, dispatcher.dispatch());
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String result2 = new String(stream.toByteArray());
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assertEquals("foo" + newLine + "bar" + newLine, result2);
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}
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@Test
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public void testMaxMessagesPerTaskSameAsMessageCount() {
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ByteArrayOutputStream stream = new ByteArrayOutputStream();
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MessageChannel channel = new SimpleChannel();
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CharacterStreamTargetAdapter adapter = new CharacterStreamTargetAdapter(stream);
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adapter.setChannel(channel);
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ConsumerPolicy policy = ConsumerPolicy.newEventDrivenPolicy();
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policy.setMaxMessagesPerTask(2);
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ChannelPollingMessageRetriever retriever = new ChannelPollingMessageRetriever(channel, policy);
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DefaultMessageDispatcher dispatcher = new DefaultMessageDispatcher(retriever);
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dispatcher.addHandler(adapter);
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dispatcher.start();
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channel.send(new StringMessage("foo"));
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channel.send(new StringMessage("bar"));
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assertEquals(2, dispatcher.dispatch());
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String result = new String(stream.toByteArray());
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assertEquals("foobar", result);
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}
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@Test
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public void testMaxMessagesPerTaskExceedsMessageCountWithAppendedNewLines() {
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ByteArrayOutputStream stream = new ByteArrayOutputStream();
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MessageChannel channel = new SimpleChannel();
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CharacterStreamTargetAdapter adapter = new CharacterStreamTargetAdapter(stream);
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adapter.setChannel(channel);
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adapter.setShouldAppendNewLine(true);
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ConsumerPolicy policy = ConsumerPolicy.newEventDrivenPolicy();
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policy.setReceiveTimeout(0);
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policy.setMaxMessagesPerTask(10);
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ChannelPollingMessageRetriever retriever = new ChannelPollingMessageRetriever(channel, policy);
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DefaultMessageDispatcher dispatcher = new DefaultMessageDispatcher(retriever);
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dispatcher.addHandler(adapter);
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dispatcher.start();
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channel.send(new StringMessage("foo"));
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channel.send(new StringMessage("bar"));
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assertEquals(2, dispatcher.dispatch());
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String result = new String(stream.toByteArray());
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String newLine = System.getProperty("line.separator");
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assertEquals("foo" + newLine + "bar" + newLine, result);
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}
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@Test
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public void testSingleNonStringObject() {
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ByteArrayOutputStream stream = new ByteArrayOutputStream();
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MessageChannel channel = new SimpleChannel();
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CharacterStreamTargetAdapter adapter = new CharacterStreamTargetAdapter(stream);
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adapter.setChannel(channel);
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ConsumerPolicy policy = ConsumerPolicy.newEventDrivenPolicy();
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ChannelPollingMessageRetriever retriever = new ChannelPollingMessageRetriever(channel, policy);
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DefaultMessageDispatcher dispatcher = new DefaultMessageDispatcher(retriever);
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dispatcher.addHandler(adapter);
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dispatcher.start();
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TestObject testObject = new TestObject("foo");
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channel.send(new GenericMessage<TestObject>(testObject));
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int count = dispatcher.dispatch();
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assertEquals(1, count);
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String result = new String(stream.toByteArray());
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assertEquals("foo", result);
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}
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@Test
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public void testTwoNonStringObjectWithOutNewLines() {
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ByteArrayOutputStream stream = new ByteArrayOutputStream();
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MessageChannel channel = new SimpleChannel();
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CharacterStreamTargetAdapter adapter = new CharacterStreamTargetAdapter(stream);
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adapter.setChannel(channel);
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ConsumerPolicy policy = ConsumerPolicy.newEventDrivenPolicy();
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policy.setReceiveTimeout(0);
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policy.setMaxMessagesPerTask(2);
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ChannelPollingMessageRetriever retriever = new ChannelPollingMessageRetriever(channel, policy);
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DefaultMessageDispatcher dispatcher = new DefaultMessageDispatcher(retriever);
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dispatcher.addHandler(adapter);
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dispatcher.start();
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TestObject testObject1 = new TestObject("foo");
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TestObject testObject2 = new TestObject("bar");
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channel.send(new GenericMessage<TestObject>(testObject1));
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channel.send(new GenericMessage<TestObject>(testObject2));
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assertEquals(2, dispatcher.dispatch());
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String result = new String(stream.toByteArray());
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assertEquals("foobar", result);
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}
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@Test
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public void testTwoNonStringObjectWithNewLines() {
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ByteArrayOutputStream stream = new ByteArrayOutputStream();
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MessageChannel channel = new SimpleChannel();
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CharacterStreamTargetAdapter adapter = new CharacterStreamTargetAdapter(stream);
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adapter.setChannel(channel);
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adapter.setShouldAppendNewLine(true);
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ConsumerPolicy policy = ConsumerPolicy.newEventDrivenPolicy();
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policy.setReceiveTimeout(0);
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policy.setMaxMessagesPerTask(2);
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ChannelPollingMessageRetriever retriever = new ChannelPollingMessageRetriever(channel, policy);
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DefaultMessageDispatcher dispatcher = new DefaultMessageDispatcher(retriever);
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dispatcher.addHandler(adapter);
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dispatcher.start();
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TestObject testObject1 = new TestObject("foo");
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TestObject testObject2 = new TestObject("bar");
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channel.send(new GenericMessage<TestObject>(testObject1));
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channel.send(new GenericMessage<TestObject>(testObject2));
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assertEquals(2, dispatcher.dispatch());
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String result = new String(stream.toByteArray());
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String newLine = System.getProperty("line.separator");
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assertEquals("foo" + newLine + "bar" + newLine, result);
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}
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private static class TestObject {
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private String text;
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TestObject(String text) {
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this.text = text;
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}
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public String toString() {
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return this.text;
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}
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}
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}
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