MySQL读写分离又一好办法 使用 com.mysql.jdbc.ReplicationDriver

在用过Amoeba 和 Cobar，还有dbware 等读写分离组件后，今天我的一个好朋友跟我讲，MySQL自身的也是可以读写分离的，因为他们提供了一个新的驱动，叫 com.mysql.jdbc.ReplicationDriver

 

说明文档：http://dev.mysql.com/doc/refman/5.1/en/connector-j-reference-replication-connection.html

 

代码例子：

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import java.sql.Connection;

import java.sql.ResultSet;

import java.util.Properties;

 

import com.mysql.jdbc.ReplicationDriver;

 

public class ReplicationDriverDemo {

 

  public static void main(String[] args) throws Exception {

    ReplicationDriver driver = new ReplicationDriver();

 

    Properties props = new Properties();

 

    // We want this for failover on the slaves

    props.put("autoReconnect", "true");

 

    // We want to load balance between the slaves

    props.put("roundRobinLoadBalance", "true");

 

    props.put("user", "foo");

    props.put("password", "bar");

 

    //

    // Looks like a normal MySQL JDBC url, with a

    // comma-separated list of hosts, the first

    // being the 'master', the rest being any number

    // of slaves that the driver will load balance against

    //

 

    Connection conn =

        driver.connect("jdbc:mysql:replication://master,slave1,slave2,slave3/test",

            props);

 

    //

    // Perform read/write work on the master

    // by setting the read-only flag to "false"

    //

 

    conn.setReadOnly(false);

    conn.setAutoCommit(false);

    conn.createStatement().executeUpdate("UPDATE some_table ....");

    conn.commit();

 

    //

    // Now, do a query from a slave, the driver automatically picks one

    // from the list

    //

 

    conn.setReadOnly(true);

 

    ResultSet rs =

      conn.createStatement().executeQuery("SELECT a,b FROM alt_table");

 

     .......

  }

}