Jboss数据源中的数据库故障转移

Question

在JBoss数据源中，如何为数据库故障转移提供多个连接字符串，以供我使用。

将有两个具有相同表格的Mysql数据库说DB1和DB2。我想将数据插入到DB1，如果DB1关闭，那么我需要将它插入到DB2中。在DB1出现时插入到DB2期间，我需要将其余数据插入到DB1中。我怎样才能在我的JBoss中进行配置？

Answer 1

<?xml version="2.0" encoding="UTF-8"?> 
<!-- $Id$ --> 

<!-- Datasource config for MySQL using 3.0.9 available from: 
    http://www.mysql.com/downloads/api-jdbc-stable.html 
     --> 
    <datasources> 
    <local-tx-datasource> 

     <jndi-name>MySqlDSTest</jndi-name> 
     <use-java-context>true</use-java-context> 
     <connection-url>jdbc:mysql:loadbalance://ip1,ip2:3306/dbname?</connection-url> 
     <url-delimiter>|</url-delimiter> 
     <driver-class>com.mysql.jdbc.Driver</driver-class> 
     <connection-property name="readOnly">false</connection-property> 
     <autoReconnect>true</autoReconnect> 
     <failOverReadOnly>false</failOverReadOnly> 
     <user-name>userName</user-name> 
     <password>password</password> 
     <check-valid-connection-sql>selcect count(*) from TEST_TAB</check-valid-connection-sql> 
     <maxReconnects>0</maxReconnects> 
     <initialTimeout>15</initialTimeout> 
     <idle-timeout-minutes>0</idle-timeout-minutes> 
     <valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker</valid-connection-checker-class-name> 
     <!-- Advanced options for the MySQL Driver can be set with 
       <connection-property name="property">value</connection-property> 
     --> 
     <min-pool-size>5</min-pool-size> 
     <!-- Don't set this any higher than max_connections on your 
      MySQL server, usually this should be a 10 or a few 10's 
      of connections, not hundreds or thousands --> 
     <max-pool-size>20</max-pool-size> 
     <!-- Don't allow connections to hang out idle too long, 
      never longer than what wait_timeout is set to on the 
      server...A few minutes is usually okay here, 
      it depends on your application 
      and how much spikey load it will see --> 

     <!-- If you're using Connector/J 3.1.8 or newer, you can use 
      our implementation of these to increase the robustness 
      "mysql-ds.xml" 64L, 3683C  of the connection pool. --> 
     <exception-sorter-class-name> 
     com.mysql.jdbc.integration.jboss.ExtendedMysqlExceptionSorter 
     </exception-sorter-class-name> 
     <valid-connection-checker-class-name> 
     com.mysql.jdbc.integration.jboss.MysqlValidConnectionChecker 
     </valid-connection-checker-class-name> 
     <!-- sql to call when connection is created --> 
     <new-connection-sql>select 1</new-connection-sql> 
     <!-- sql to call on an existing pooled connection when it is obtained from pool - MySQLValidConnectionChecker is preferred for newer drivers --> 
     <check-valid-connection-sql> 
     select 1 
     </check-valid-connection-sql> 
     <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml --> 
     <metadata> 
     <type-mapping>mySQL</type-mapping> 
     </metadata> 
    </local-tx-datasource> 
    </datasources> 

这第二个数据库catch块本身的连接将对于JBoss测绘工作

Answer 2

请按照此文档。 Jboss有配置设置。 https://community.jboss.org/wiki/JBossJCADatabaseFailover

此外，如果您不使用JNDI和滑动JDBC调用我甲肝另一个解决方案 - 假设你是一个JDBC调用，那么你将需要获得一个数据库连接，如果DB是下跌，那么你将得到数据库连接异常，在try catch块，如果遇到连接异常，创建:-)