MySQL讀寫分離又一好辦法 使用 com.mysql.jdbc.ReplicationDriver

在用過Amoeba 和 Cobar，還有dbware 等讀寫分離組件後，今天我的一個好朋友跟我講，MySQL自身的也是可以讀寫分離的，因為他們提供了一個新的驅動，叫 com.mysql.jdbc.ReplicationDriver

 

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

 

代碼例子：

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