在idea下使用java将Log4j日志实时写入Kafka（Kafka实时日志写入）

其他 2018-11-25 20:08:49 阅读次数: 0

本篇文章主要介绍在windows下使用idea新建web项目将Log4j日志实时写入Kafka。

简要步骤：

①、新建web项目

②、启动zookeeper

③、启动Kafka

④、创建topic

⑤、启动 Kafka 消费者，运行项目，观察Kafka 消费者的控制台

详细步骤：

一、新建web项目

 

 

代码如下：

package com.demo;

import org.apache.kafka.clients.CommonClientConfigs;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.clients.producer.RecordMetadata;
import org.apache.kafka.common.config.ConfigException;
import org.apache.kafka.common.config.SslConfigs;
import org.apache.log4j.AppenderSkeleton;
import org.apache.log4j.helpers.LogLog;
import org.apache.log4j.spi.LoggingEvent;

import java.util.Date;
import java.util.Properties;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;

/**
 * A log4j appender that produces log messages to Kafka
 */
public class KafkaLog4jAppender extends AppenderSkeleton {

    private static final String BOOTSTRAP_SERVERS_CONFIG = ProducerConfig.BOOTSTRAP_SERVERS_CONFIG;
    private static final String COMPRESSION_TYPE_CONFIG = ProducerConfig.COMPRESSION_TYPE_CONFIG;
    private static final String ACKS_CONFIG = ProducerConfig.ACKS_CONFIG;
    private static final String RETRIES_CONFIG = ProducerConfig.RETRIES_CONFIG;
    private static final String KEY_SERIALIZER_CLASS_CONFIG = ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG;
    private static final String VALUE_SERIALIZER_CLASS_CONFIG = ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG;
    private static final String SECURITY_PROTOCOL = CommonClientConfigs.SECURITY_PROTOCOL_CONFIG;
    private static final String SSL_TRUSTSTORE_LOCATION = SslConfigs.SSL_TRUSTSTORE_LOCATION_CONFIG;
    private static final String SSL_TRUSTSTORE_PASSWORD = SslConfigs.SSL_TRUSTSTORE_PASSWORD_CONFIG;
    private static final String SSL_KEYSTORE_TYPE = SslConfigs.SSL_KEYSTORE_TYPE_CONFIG;
    private static final String SSL_KEYSTORE_LOCATION = SslConfigs.SSL_KEYSTORE_LOCATION_CONFIG;
    private static final String SSL_KEYSTORE_PASSWORD = SslConfigs.SSL_KEYSTORE_PASSWORD_CONFIG;

    private String brokerList = null;
    private String topic = null;
    private String compressionType = null;
    private String securityProtocol = null;
    private String sslTruststoreLocation = null;
    private String sslTruststorePassword = null;
    private String sslKeystoreType = null;
    private String sslKeystoreLocation = null;
    private String sslKeystorePassword = null;

    private int retries = 0;
    private int requiredNumAcks = Integer.MAX_VALUE;
    private boolean syncSend = false;
    private Producer<byte[], byte[]> producer = null;

    public Producer<byte[], byte[]> getProducer() {
        return producer;
    }

    public String getBrokerList() {
        return brokerList;
    }

    public void setBrokerList(String brokerList) {
        this.brokerList = brokerList;
    }

    public int getRequiredNumAcks() {
        return requiredNumAcks;
    }

    public void setRequiredNumAcks(int requiredNumAcks) {
        this.requiredNumAcks = requiredNumAcks;
    }

    public int getRetries() {
        return retries;
    }

    public void setRetries(int retries) {
        this.retries = retries;
    }

    public String getCompressionType() {
        return compressionType;
    }

    public void setCompressionType(String compressionType) {
        this.compressionType = compressionType;
    }

    public String getTopic() {
        return topic;
    }

    public void setTopic(String topic) {
        this.topic = topic;
    }

    public boolean getSyncSend() {
        return syncSend;
    }

    public void setSyncSend(boolean syncSend) {
        this.syncSend = syncSend;
    }

    public String getSslTruststorePassword() {
        return sslTruststorePassword;
    }

    public String getSslTruststoreLocation() {
        return sslTruststoreLocation;
    }

    public String getSecurityProtocol() {
        return securityProtocol;
    }

    public void setSecurityProtocol(String securityProtocol) {
        this.securityProtocol = securityProtocol;
    }

    public void setSslTruststoreLocation(String sslTruststoreLocation) {
        this.sslTruststoreLocation = sslTruststoreLocation;
    }

    public void setSslTruststorePassword(String sslTruststorePassword) {
        this.sslTruststorePassword = sslTruststorePassword;
    }

    public void setSslKeystorePassword(String sslKeystorePassword) {
        this.sslKeystorePassword = sslKeystorePassword;
    }

    public void setSslKeystoreType(String sslKeystoreType) {
        this.sslKeystoreType = sslKeystoreType;
    }

    public void setSslKeystoreLocation(String sslKeystoreLocation) {
        this.sslKeystoreLocation = sslKeystoreLocation;
    }

    public String getSslKeystoreLocation() {
        return sslKeystoreLocation;
    }

    public String getSslKeystoreType() {
        return sslKeystoreType;
    }

    public String getSslKeystorePassword() {
        return sslKeystorePassword;
    }

    @Override
    public void activateOptions() {
        // check for config parameter validity
        Properties props = new Properties();
        if (brokerList != null)
            props.put(BOOTSTRAP_SERVERS_CONFIG, brokerList);
        if (props.isEmpty())
            throw new ConfigException("The bootstrap servers property should be specified");
        if (topic == null)
            throw new ConfigException("Topic must be specified by the Kafka log4j appender");
        if (compressionType != null)
            props.put(COMPRESSION_TYPE_CONFIG, compressionType);
        if (requiredNumAcks != Integer.MAX_VALUE)
            props.put(ACKS_CONFIG, Integer.toString(requiredNumAcks));
        if (retries > 0)
            props.put(RETRIES_CONFIG, retries);
        if (securityProtocol != null && sslTruststoreLocation != null &&
                sslTruststorePassword != null) {
            props.put(SECURITY_PROTOCOL, securityProtocol);
            props.put(SSL_TRUSTSTORE_LOCATION, sslTruststoreLocation);
            props.put(SSL_TRUSTSTORE_PASSWORD, sslTruststorePassword);

            if (sslKeystoreType != null && sslKeystoreLocation != null &&
                    sslKeystorePassword != null) {
                props.put(SSL_KEYSTORE_TYPE, sslKeystoreType);
                props.put(SSL_KEYSTORE_LOCATION, sslKeystoreLocation);
                props.put(SSL_KEYSTORE_PASSWORD, sslKeystorePassword);
            }
        }

        props.put(KEY_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.ByteArraySerializer");
        props.put(VALUE_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.ByteArraySerializer");
        this.producer = getKafkaProducer(props);
        LogLog.debug("Kafka producer connected to " + brokerList);
        LogLog.debug("Logging for topic: " + topic);
    }

    protected Producer<byte[], byte[]> getKafkaProducer(Properties props) {
        return new KafkaProducer<byte[], byte[]>(props);
    }

    @Override
    protected void append(LoggingEvent event) {
        String message = subAppend(event);
        LogLog.debug("[" + new Date(event.getTimeStamp()) + "]" + message);
        Future<RecordMetadata> response = producer.send(new ProducerRecord<byte[], byte[]>(topic, message.getBytes()));
        if (syncSend) {
            try {
                response.get();
            } catch (InterruptedException ex) {
                throw new RuntimeException(ex);
            } catch (ExecutionException ex) {
                throw new RuntimeException(ex);
            }
        }
    }

    private String subAppend(LoggingEvent event) {
        return (this.layout == null) ? event.getRenderedMessage() : this.layout.format(event);
    }

    public void close() {
        if (!this.closed) {
            this.closed = true;
            producer.close();
        }
    }

    public boolean requiresLayout() {
        return true;
    }
}
package com.demo;

import org.apache.log4j.Logger;

/**
 * 模拟日志产生
 * Created by zhoujh on 2018/8/9.
 */
public class KafkaLog4jApp {

    private static Logger logger = Logger.getLogger(KafkaLog4jApp.class.getName());

    public static void main(String[] args) throws Exception {
        int index = 0;

        while(true) {
            Thread.sleep(1000);
            logger.info("value is: " + index++);
        }
    }
}

log4j.properties


log4j.rootLogger=INFO,stdout,kafka

log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.target = System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c] [%p] - %m%n

log4j.appender.kafka = com.demo.KafkaLog4jAppender
log4j.appender.kafka.topic = log4jtest
log4j.appender.kafka.brokerList=node1:9092
log4j.appender.kafka.layout=org.apache.log4j.PatternLayout
log4j.appender.kafka.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c] [%p] - %m%n

完整pom.cml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.demo</groupId>
    <artifactId>log-kafka-flume</artifactId>
    <version>1.0-SNAPSHOT</version>


    <dependencies>
        <dependency>
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka_2.11</artifactId>
            <version>0.11.0.0</version>
        </dependency>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.16</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.21</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

 

二、启动zookeeper

zkServer.sh start

三、启动Kafka

进入kafka bin目录

bin/kafka-server-start.sh config/server.properties

四、创建topic

./kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic log4jtest
./kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic log4jtest

 

五、启动 Kafka 消费者，运行项目，观察Kafka 消费者的控制台

./kafka-console-consumer.sh --bootstrap-server localhost:9092  --topic log4jtest

控制台打印

[hadoop@node1 bin]$ ./kafka-console-consumer.sh --bootstrap-server localhost:9092  --topic log4jtest
2018-08-09 17:35:13,271 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 0

2018-08-09 17:35:14,406 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 1

2018-08-09 17:35:15,406 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 2

2018-08-09 17:35:16,406 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 3

2018-08-09 17:35:17,406 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 4

2018-08-09 17:35:18,407 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 5

2018-08-09 17:35:19,497 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 6

2018-08-09 17:35:20,497 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 7

2018-08-09 17:35:21,497 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 8

2018-08-09 17:35:22,497 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 9

2018-08-09 17:35:23,497 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 10

2018-08-09 17:35:24,497 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 11

2018-08-09 17:35:25,497 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 12

2018-08-09 17:35:26,497 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 13

2018-08-09 17:35:27,497 [main] [com.demo.KafkaLog4jApp] [INFO] - value is: 14

程序截图： 

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转载自blog.csdn.net/zjh_746140129/article/details/84329927
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