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How to configure database failover and high availability in JBoss 7 Datasource?


If we are configuring our application for high availability and disaster recover, it is mandatory to have failover configurations at DB datasource level as well. In this page, we described how to configure database failover in JBoss 7. Close watch below JBoss datasource configurations. The "connection-url" tag contains two connection urls with a delimiter "|". The delimiter character also required to mention with "url-delimiter" tag.

With this failover configuration, JBoss connects to the first specified DB. On any failure, JBoss tries to connect to second DB url.

<datasource jndi-name="java:jboss/jdbc/HADatasource" pool-name="HADatasource" 
												enabled="true" use-java-context="true">
	<connection-url>
		jdbc:oracle:thin:@db-host:db-port/service|jdbc:oracle:thin:@db-host:db-port/service
	</connection-url>
	<url-delimiter>|</url-delimiter>
	<driver>oracle</driver>
	<security>
		<user-name>user-name</user-name>
		<password>password</password>
	</security>
</datasource>
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JBoss configuration examples

  1. How to start/stop JBoss AS 7 in standalone mode?
  2. How to load external property file in JBoss 7 classpath?
  3. How to configure Data Source (JDBC Connection Pool) in JBoss AS 7 standalone mode?
  4. How to configure database failover and high availability in JBoss 7 Datasource?
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What is servlet context?
The servlet context is an interface which helps to communicate with other servlets. It contains information about the Web application and container. It is kind of application environment. Using the context, a servlet can obtain URL references to resources, and store attributes that other servlets in the context can use.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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