058 kafka与log4j集成

1.首先在resources下面写log4j.properties

　　主要是因为kafka.producer.KafkaLog4jAppender类的存在。

 1 log4j.rootLogger=INFO,console,KAFKA
 2 
 3 ## appender KAFKA
 4 log4j.appender.KAFKA=kafka.producer.KafkaLog4jAppender
 5 ## topic must exitss
 6 log4j.appender.KAFKA.topic=beifeng
 7 log4j.appender.KAFKA.brokerList=linux-hadoop01.ibeifeng.com:9092,linux-hadoop01.ibeifeng.com:9093
 8 log4j.appender.KAFKA.compressionType=none
 9 log4j.appender.KAFKA.syncSend=false
10 log4j.appender.KAFKA.layout=org.apache.log4j.PatternLayout
11 log4j.appender.KAFKA.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L %% - %m
12 
13 ## appender console
14 log4j.appender.console=org.apache.log4j.ConsoleAppender
15 log4j.appender.console.layout=org.apache.log4j.PatternLayout
16 log4j.appender.console.layout.ConversionPattern=%d (%t) [%p - %l] %m%n

2.测试类

 1 package com.jun.it;
 2 
 3 
 4 import org.apache.log4j.Logger;
 5 
 6 public class KafkaLoggerTest {
 7     public static final Logger logger = Logger.getLogger(KafkaLoggerTest.class);
 8 
 9     public static void main(String[] args) throws InterruptedException {
10         for(int i=0;i<50;i++) {
11             logger.debug("debug_" + i);
12             logger.info("info_" + i);
13             logger.warn("warn_" + i);
14             logger.error("error_" + i);
15             logger.fatal("fatal_" + i);
16         }
17 
18         // 如果不sleep，会出现什么情况？怎么解决
19         Thread.sleep(10000);
20     }
21 }

3.开启9092端口的消费者服务

　　bin/kafka-console-consumer.sh --topic beifeng --zookeeper linux-hadoop01.ibeifeng.com:2181/kafka

4.效果