自定义Sink到MySQL

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package org.flume.mysql.sink;
/**
 * create by yong 2016-6-16
 */
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;
    }
}

依赖

<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>

flume配置

agent1.sources = source1
agent1.sinks = mysqlSink
agent1.channels = channel1
 
 
 
# Describe/configure source1
agent1.sources.source1.type  =  exec
agent1.sources.source1.command  = tail -F /home/yong/Work/flum-1.6/tail_log_exec
agent1.sources.source1.channels = channel1
 
 
# Describe mysqlSink
agent1.sinks.mysqlSink.type  = org.flume.mysql.sink.MysqlSink
agent1.sinks.mysqlSink.hostname =localhost
agent1.sinks.mysqlSink.port=3306
agent1.sinks.mysqlSink.databaseName=sinktest
agent1.sinks.mysqlSink.tableName=mysqltest
agent1.sinks.mysqlSink.user=root
agent1.sinks.mysqlSink.password=root
agent1.sinks.mysqlSink.channel = channel1
  
# Use a channel which buffers events in memory
agent1.channels.channel1.type = memory
agent1.channels.channel1.capacity = 1000
agent1.channels.channel1.transactionCapactiy = 100

原文链接 (opens new window)

拦截器

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