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2014-04-12T15:19:29.282Z
1397315969360

package com.sam.project.kafka;
 
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.TimeUnit;
 
import org.apache.kafka.common.security.JaasUtils;
 
import kafka.admin.AdminUtils;
import kafka.admin.RackAwareMode;
import kafka.consumer.Consumer;
import kafka.consumer.ConsumerConfig;
import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;
import kafka.consumer.Whitelist;
import kafka.javaapi.consumer.ConsumerConnector;
import kafka.message.MessageAndMetadata;
import kafka.server.ConfigType;
import kafka.utils.ZkUtils;
 
import kafka.javaapi.producer.Producer;  
import kafka.producer.KeyedMessage;  
import kafka.producer.ProducerConfig;  
import kafka.serializer.StringEncoder;  
 
 
/**
 * Test kafka
 */
public class App {
	private final static String URL = "192.168.1.114:2181";
	private final static String NAME = "test_topic";
 
	// 创建主题
	private static void createTopic() {
		ZkUtils zkUtils = ZkUtils.apply(URL, 30000, 30000, JaasUtils.isZkSecurityEnabled());
		// 创建一个单分区单副本名为t1的topic
		AdminUtils.createTopic(zkUtils, NAME, 1, 1, new Properties(), RackAwareMode.Enforced$.MODULE$);
		zkUtils.close();
		System.out.println("创建成功!");
	}
 
	// 删除主题(未彻底删除)
	private static void deleteTopic() {
		ZkUtils zkUtils = ZkUtils.apply(URL, 30000, 30000, JaasUtils.isZkSecurityEnabled());
		// 删除topic 't1'
		AdminUtils.deleteTopic(zkUtils, NAME);
		zkUtils.close();
		System.out.println("删除成功!");
	}
 
	// 修改主题
	private static void editTopic() {
		ZkUtils zkUtils = ZkUtils.apply(URL, 30000, 30000, JaasUtils.isZkSecurityEnabled());
		Properties props = AdminUtils.fetchEntityConfig(zkUtils, ConfigType.Topic(), NAME);
		// 增加topic级别属性
		props.put("min.cleanable.dirty.ratio", "0.3");
		// 删除topic级别属性
		props.remove("max.message.bytes");
		// 修改topic 'test'的属性
		AdminUtils.changeTopicConfig(zkUtils, NAME, props);
		zkUtils.close();
	}
 
	// 主题读取
	private static void queryTopic() {
		ZkUtils zkUtils = ZkUtils.apply(URL, 30000, 30000, JaasUtils.isZkSecurityEnabled());
		// 获取topic 'test'的topic属性属性
		Properties props = AdminUtils.fetchEntityConfig(zkUtils, ConfigType.Topic(), NAME);
		// 查询topic-level属性
		Iterator it = props.entrySet().iterator();
		while (it.hasNext()) {
			Map.Entry entry = (Map.Entry) it.next();
			Object key = entry.getKey();
			Object value = entry.getValue();
			System.out.println(key + " = " + value);
		}
		zkUtils.close();
	}
 
	/**
	 * @Description: 生产者
	 */
	private static void producer() {
		Properties properties = new Properties();
	     properties.put("zookeeper.connect", "192.168.1.114:2181");//声明zk  
	        properties.put("serializer.class", StringEncoder.class.getName());  
	        properties.put("metadata.broker.list", "192.168.1.114:9092");// 声明kafka broker  
		
		Producer producer = new Producer<Integer, String>(new ProducerConfig(properties)); 
		int i=0;  
        while(true){  
            producer.send(new KeyedMessage<Integer, String>(NAME, "message: " + i++));  
            try {  
                TimeUnit.SECONDS.sleep(1);  
            } catch (InterruptedException e) {  
                e.printStackTrace();  
            }  
        }  
	}
 
	/**
	 * @Description: 消费者
	 */
	private static void customer() {
		try {
			Properties properties = new Properties();
			properties.put("zookeeper.connect", URL);
			properties.put("auto.commit.enable", "true");
			properties.put("auto.commit.interval.ms", "60000");
			properties.put("group.id", "test_topic");
 
			ConsumerConfig consumerConfig = new ConsumerConfig(properties);
 
			ConsumerConnector javaConsumerConnector = Consumer.createJavaConsumerConnector(consumerConfig);
 
			// topic的过滤器
			Whitelist whitelist = new Whitelist("test_topic");
			List<KafkaStream<byte[], byte[]>> partitions = javaConsumerConnector
					.createMessageStreamsByFilter(whitelist);
 
			if (partitions == null) {
				System.out.println("empty!");
				TimeUnit.SECONDS.sleep(1);
			}
 
			System.out.println("partitions:"+partitions.size());
			
			// 消费消息
			for (KafkaStream<byte[], byte[]> partition : partitions) {
 
				ConsumerIterator<byte[], byte[]> iterator = partition.iterator();
				while (iterator.hasNext()) {
					MessageAndMetadata<byte[], byte[]> next = iterator.next();
					System.out.println("partiton:" + next.partition());
					System.out.println("offset:" + next.offset());
					System.out.println("接收到message:" + new String(next.message(), "utf-8"));
				}
			}
		} catch (Exception e) {
			// TODO: handle exception
		}
	}
 
	public static void main(String[] args) {
		 createTopic();
//		 deleteTopic();
		// editTopic();
		// queryTopic();
 
		 //producer();
 
//		customer();
	}
}

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