/**
* 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.
*/
package org.flume.mysql.sink;
/**
* @authorchao.gao
* @date 2016年1月14日 上午8:38:50
* @version <b>1.0.0</b>
*/
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...");
}
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();
}
}
}
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;
}
}
pom.xml依赖如下：
<?xml version="1.0"?>
<!--
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 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.apache.flume</groupId>
<artifactId>flume-parent</artifactId>
<version>1.4.0</version>
</parent>
<groupId>org.apache.flume</groupId>
<artifactId>flume-mysql-sink</artifactId>
<version>1.4.0</version>
<name>flume-mysql-sink</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<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>
</project>
数据库
发布于：2021-07-03 21:40
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阅读数：311
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