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自定义sink(mysql)

1、ide打开下载后的源码

2、代码如下:

/**
 * 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.
 */

/**
 * User: 过往记忆
 * Date: 14-9-4
 * Time: 下午13:16
 * bolg: https://www.iteblog.com
 * 本文地址：https://www.iteblog.com/archives/1109
 * 过往记忆博客，专注于hadoop、hive、spark、shark、flume的技术博客，大量的干货
 * 过往记忆博客微信公共帐号：iteblog_hadoop
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package com.pf;
import com.google.common.base.Preconditions;
import com.google.common.base.Throwables;
import com.google.common.collect.Lists;
import org.apache.flume.*;
import org.apache.flume.conf.Configurable;
import org.apache.flume.sink.AbstractSink;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.List;

public class MysqlSink extends AbstractSink implements Configurable {

    private Logger LOG = LoggerFactory.getLogger(MysqlSink.class);
    private String hostname;
    private String port;
    private String databaseName;
    private String tableName;
    private String user;
    private String password;
    private PreparedStatement preparedStatement;
    private Connection conn;
    private int batchSize;

    public MysqlSink() {
        LOG.info("MysqlSink start...");
    }

    @Override
    public void configure(Context context) {
        hostname = context.getString("hostname");
        Preconditions.checkNotNull(hostname, "hostname must be set!!");
        port = context.getString("port");
        Preconditions.checkNotNull(port, "port must be set!!");
        databaseName = context.getString("databaseName");
        Preconditions.checkNotNull(databaseName, "databaseName must be set!!");
        tableName = context.getString("tableName");
        Preconditions.checkNotNull(tableName, "tableName must be set!!");
        user = context.getString("user");
        Preconditions.checkNotNull(user, "user must be set!!");
        password = context.getString("password");
        Preconditions.checkNotNull(password, "password must be set!!");
        batchSize = context.getInteger("batchSize", 100);
        Preconditions.checkNotNull(batchSize > 0, "batchSize must be a positive number!!");
    }

    @Override
    public void start() {
        super.start();
        try {
            //调用Class.forName()方法加载驱动程序
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }

        String url = "jdbc:mysql://" + hostname + ":" + port + "/" + databaseName;
        //调用DriverManager对象的getConnection()方法，获得一个Connection对象

        try {
            conn = DriverManager.getConnection(url, user, password);
            conn.setAutoCommit(false);
            //创建一个Statement对象
            preparedStatement = conn.prepareStatement("insert into " + tableName +
                                               " (content) values (?)");

        } catch (SQLException e) {
            e.printStackTrace();
            System.exit(1);
        }

    }

    @Override
    public void stop() {
        super.stop();
        if (preparedStatement != null) {
            try {
                preparedStatement.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    public Status process() throws EventDeliveryException {
        Status result = Status.READY;
        Channel channel = getChannel();
        Transaction transaction = channel.getTransaction();
        Event event;
        String content;

        List<String> actions = Lists.newArrayList();
        transaction.begin();
        try {
            for (int i = 0; i < batchSize; i++) {
                event = channel.take();
                if (event != null) {
                    content = new String(event.getBody());
                    actions.add(content);
                } else {
                    result = Status.BACKOFF;
                    break;
                }
            }

            if (actions.size() > 0) {
                preparedStatement.clearBatch();
                for (String temp : actions) {
                    preparedStatement.setString(1, temp);
                    preparedStatement.addBatch();
                }
                preparedStatement.executeBatch();

                conn.commit();
            }
            transaction.commit();
        } catch (Throwable e) {
            try {
                transaction.rollback();
            } catch (Exception e2) {
                LOG.error("Exception in rollback. Rollback might not have been" +
                        "successful.", e2);
            }
            LOG.error("Failed to commit transaction." +
                    "Transaction rolled back.", e);
            Throwables.propagate(e);
        } finally {
            transaction.close();
        }

        return result;
    }
}

3、pom文件

<?xml version="1.0" encoding="UTF-8"?>
<!--
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.
-->
<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>

   <parent>
    <artifactId>flume-ng-sinks</artifactId>
    <groupId>org.apache.flume</groupId>
    <version>1.7.0</version>
  </parent>
  <artifactId>pf</artifactId>
  <packaging>jar</packaging>

  <name>pf</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.flume</groupId>
            <artifactId>flume-ng-core</artifactId>
        </dependency>

        <dependency>
            <groupId>org.apache.flume</groupId>
            <artifactId>flume-ng-configuration</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.25</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
        </dependency>

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

   <!--  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.rat</groupId>
        <artifactId>apache-rat-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-jar-plugin</artifactId>
        <executions>
          <execution>
            <goals>
              <goal>test-jar</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build> -->
</project>

4、建库建表

create database ngmonitor;

create table mysqltest(
    id int(11) NOT NULL AUTO_INCREMENT,
    content varchar(50000) NOT NULL,
    PRIMARY KEY (`id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

5、打包--> lib目录下(含mysql的jar)

6、参考conf

# example2.conf:

# Name the components on this agent
a1.sources = r1
a1.sinks = k1
a1.channels = c1

# Describe/configure the source
a1.sources.r1.type = spooldir
a1.sources.r1.spoolDir = /home/wwj/flumeSpool
a1.sources.r1.fileHeader = false
a1.sources.r1.maxBackoff = 60000
#a1.sources.r1.ignorePattern = ^[\s]*\n 

# Describe the sink
a1.sinks.k1.type = com.pf.MysqlSink
a1.sinks.k1.hostname = localhost
a1.sinks.k1.port = 3306
a1.sinks.k1.databaseName = ngmonitor
a1.sinks.k1.tableName = mysqltest
a1.sinks.k1.user = root
a1.sinks.k1.password= 123456

# Use a channel which buffers events in memory
a1.channels.c1.type = memory
a1.channels.c1.capacity = 1000
a1.channels.c1.transactionCapacity = 100

# Bind the source and sink to the channel
a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1

7、启动

bin/flume-ng agent --conf conf --conf-file conf/example2.conf --name a1 -Dflume.root.logger=INFO,console

8、成功