Configure JNDI Datasource in tomcat and mysql

by rajesh 2012-04-14 11:24:19

Configure JNDI Datasource in tomcat, mysql

a) put your driver in $CATALINA_HOME/lib

b) configure a JNDI DataSource in Tomcat by adding a declaration for your resource to your Context
<Context path="/DBTest" docBase="DBTest"
debug="5" reloadable="true" crossContext="true">

<!-- maxActive: Maximum number of dB connections in pool. Make sure you
configure your mysqld max_connections large enough to handle
all of your db connections. Set to -1 for no limit.

<!-- maxIdle: Maximum number of idle dB connections to retain in pool.
Set to -1 for no limit. See also the DBCP documentation on this
and the minEvictableIdleTimeMillis configuration parameter.

<!-- maxWait: Maximum time to wait for a dB connection to become available
in ms, in this example 10 seconds. An Exception is thrown if
this timeout is exceeded. Set to -1 to wait indefinitely.

<!-- username and password: MySQL dB username and password for dB connections -->

<!-- driverClassName: Class name for the old mm.mysql JDBC driver is - we recommend using Connector/J though.
Class name for the official MySQL Connector/J driver is com.mysql.jdbc.Driver.

<!-- url: The JDBC connection url for connecting to your MySQL dB.

<Resource name="jdbc/TestDB" auth="Container" type="javax.sql.DataSource"
maxActive="100" maxIdle="30" maxWait="10000"
username="javauser" password="javadude" driverClassName="com.mysql.jdbc.Driver"


c)Declare this resource in your web.xml:
<web-app xmlns=""
<description>MySQL Test App</description>
<description>DB Connection</description>

And get the datasource with a JNDI lookup in your application:

Context initCtx = new InitialContext();
Context envCtx = (Context) initCtx.lookup("java:comp/env");
DataSource ds = (DataSource) envCtx.lookup("jdbc/TestDB");

Connection conn = ds.getConnection();
... use this connection to access the database ...

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