TestUtils.java

/**
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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
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package org.apache.storm.kafka;

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;

import org.apache.storm.kafka.trident.GlobalPartitionInformation;
import org.apache.storm.utils.Utils;

import kafka.api.OffsetRequest;
import kafka.javaapi.consumer.SimpleConsumer;
import kafka.javaapi.message.ByteBufferMessageSet;
import kafka.message.Message;
import kafka.message.MessageAndOffset;
import static org.junit.Assert.assertEquals;

public final class TestUtils {

  private TestUtils() {
  }

  public static final String TOPIC = "test";

  public static GlobalPartitionInformation buildPartitionInfo(int numPartitions) {
    return buildPartitionInfo(numPartitions, 9092);
  }

  public static List<GlobalPartitionInformation> buildPartitionInfoList(
      GlobalPartitionInformation partitionInformation) {
    List<GlobalPartitionInformation> map = new ArrayList<GlobalPartitionInformation>();
    map.add(partitionInformation);
    return map;
  }

  public static GlobalPartitionInformation buildPartitionInfo(int numPartitions, int brokerPort) {
    GlobalPartitionInformation globalPartitionInformation = new GlobalPartitionInformation(TOPIC);
    for (int i = 0; i < numPartitions; i++) {
      globalPartitionInformation.addPartition(i,
          Broker.fromString("broker-" + i + " :" + brokerPort));
    }
    return globalPartitionInformation;
  }

  public static SimpleConsumer getKafkaConsumer(KafkaTestBroker broker) {
    BrokerHosts brokerHosts = getBrokerHosts(broker);
    KafkaConfig kafkaConfig = new KafkaConfig(brokerHosts, TOPIC);
    SimpleConsumer simpleConsumer = new SimpleConsumer("localhost",
        broker.getPort(), 60000, 1024, "testClient");
    return simpleConsumer;
  }

  public static KafkaConfig getKafkaConfig(KafkaTestBroker broker) {
    BrokerHosts brokerHosts = getBrokerHosts(broker);
    KafkaConfig kafkaConfig = new KafkaConfig(brokerHosts, TOPIC);
    return kafkaConfig;
  }

  private static BrokerHosts getBrokerHosts(KafkaTestBroker broker) {
    GlobalPartitionInformation globalPartitionInformation = new GlobalPartitionInformation(TOPIC);
    globalPartitionInformation.addPartition(0,
        Broker.fromString(broker.getBrokerConnectionString()));
    return new StaticHosts(globalPartitionInformation);
  }

  public static Properties getProducerProperties(String brokerConnectionString) {
    Properties props = new Properties();
    props.put("bootstrap.servers", brokerConnectionString);
    props.put("acks", "1");
    props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
    props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
    return props;
  }

  public static boolean verifyMessage(String key, String message,
                                      KafkaTestBroker broker, SimpleConsumer simpleConsumer) {
    long lastMessageOffset =
        KafkaUtils.getOffset(simpleConsumer, TestUtils.TOPIC, 0, OffsetRequest.LatestTime()) - 1;
    ByteBufferMessageSet messageAndOffsets =
        KafkaUtils.fetchMessages(TestUtils.getKafkaConfig(broker), simpleConsumer,
            new Partition(Broker.fromString(broker.getBrokerConnectionString()),
                TestUtils.TOPIC, 0), lastMessageOffset);
    MessageAndOffset messageAndOffset = messageAndOffsets.iterator().next();
    Message kafkaMessage = messageAndOffset.message();
    ByteBuffer messageKeyBuffer = kafkaMessage.key();
    String keyString = null;
    String messageString = new String(Utils.toByteArray(kafkaMessage.payload()));
    if (messageKeyBuffer != null) {
      keyString = new String(Utils.toByteArray(messageKeyBuffer));
    }
    assertEquals(key, keyString);
    assertEquals(message, messageString);
    return true;
  }
}