MySQL 读写分离实例详解

mysql 读写分离

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：

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");
 
   .......
 }
}

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