/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.s4.wordcount;
import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import junit.framework.Assert;
import org.apache.s4.base.Event;
import org.apache.s4.comm.DefaultCommModule;
import org.apache.s4.comm.serialize.SerializerDeserializerFactory;
import org.apache.s4.comm.tcp.TCPEmitter;
import org.apache.s4.core.BaseModule;
import org.apache.s4.core.DefaultCoreModule;
import org.apache.s4.core.S4Node;
import org.apache.s4.core.util.AppConfig;
import org.apache.s4.deploy.DeploymentUtils;
import org.apache.s4.fixtures.CommTestUtils;
import org.apache.s4.fixtures.ZkBasedTest;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.ZooKeeper;
import org.junit.Test;
import com.google.common.io.Resources;
import com.google.inject.Guice;
import com.google.inject.Injector;
public class WordCountTest extends ZkBasedTest {
public static final String SENTENCE_1 = "to be or not to be doobie doobie da";
public static final int SENTENCE_1_TOTAL_WORDS = SENTENCE_1.split(" ").length;
public static final String SENTENCE_2 = "doobie doobie da";
public static final int SENTENCE_2_TOTAL_WORDS = SENTENCE_2.split(" ").length;
public static final String SENTENCE_3 = "doobie";
public static final int SENTENCE_3_TOTAL_WORDS = SENTENCE_3.split(" ").length;
public static final String FLAG = ";";
public static int TOTAL_WORDS = SENTENCE_1_TOTAL_WORDS + SENTENCE_2_TOTAL_WORDS + SENTENCE_3_TOTAL_WORDS;
private TCPEmitter emitter;
Injector injector;
public void createEmitter() throws IOException {
injector = Guice.createInjector(new BaseModule(
Resources.getResource("default.s4.base.properties").openStream(), "cluster1"), new DefaultCommModule(
Resources.getResource("default.s4.comm.properties").openStream()), new DefaultCoreModule(Resources
.getResource("default.s4.core.properties").openStream()));
emitter = injector.getInstance(TCPEmitter.class);
}
/**
* A simple word count application:
*
*
*
*
* sentences words word counts Adapter ------------> WordSplitterPE -----------> WordCounterPE ------------->
* WordClassifierPE key = "sentence" key = word key="classifier" (should be *)
*
*
* The test consists in checking that words are correctly counted.
*
*
*/
@Test
public void testSimple() throws Exception {
final ZooKeeper zk = CommTestUtils.createZkClient();
DeploymentUtils.initAppConfig(new AppConfig.Builder().appClassName(WordCountApp.class.getName()).build(),
"cluster1", true, "localhost:2181");
S4Node.main(new String[] { "-cluster=cluster1", });
// we create the emitter now, it will share zk node assignment with the S4 node
createEmitter();
CountDownLatch signalTextProcessed = new CountDownLatch(1);
CommTestUtils.watchAndSignalCreation("/results", signalTextProcessed, zk);
// add authorizations for processing
for (int i = 1; i <= SENTENCE_1_TOTAL_WORDS + SENTENCE_2_TOTAL_WORDS + 1; i++) {
zk.create("/continue_" + i, new byte[0], Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL);
}
injectSentence(SENTENCE_1);
injectSentence(SENTENCE_2);
injectSentence(SENTENCE_3);
Assert.assertTrue(signalTextProcessed.await(10, TimeUnit.SECONDS));
String results = new String(zk.getData("/results", false, null));
Assert.assertEquals("be=2;da=2;doobie=5;not=1;or=1;to=2;", results);
}
public void injectSentence(String sentence) throws IOException, InterruptedException {
Event event = new Event();
event.setStreamId("inputStream");
event.put("sentence", String.class, sentence);
// NOTE: we send to partition 0 since partition 1 hosts the emitter
emitter.send(
0,
injector.getInstance(SerializerDeserializerFactory.class)
.createSerializerDeserializer(Thread.currentThread().getContextClassLoader()).serialize(event));
}
}