tomcat Configuring a JNDI datasource JNDI Datasource for PostgreSQL & MySQL

Example

Declare JNDI resource in tomcat's server.xml, using the Tomcat JDBC connection pool:

<GlobalNamingResources>
    <Resource name="jdbc/DatabaseName"
              factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
              auth="Container"
              type="javax.sql.DataSource"
              username="dbUser"
              password="dbPassword"
              url="jdbc:postgresql://host/dbname"
              driverClassName="org.postgresql.Driver"
              initialSize="20"
              maxWaitMillis="15000"
              maxTotal="75"
              maxIdle="20"
              maxAge="7200000"
              testOnBorrow="true"
              validationQuery="select 1"
              />
</GlobalNamingResources>

And reference the JNDI resource from Tomcat's web context.xml:

  <ResourceLink name="jdbc/DatabaseName"
   global="jdbc/DatabaseName"
   type="javax.sql.DataSource"/>

If using MySQL, change URL, driver, and validation query:

  url="jdbc:mysql://host:3306/dbname"
  driverClassName="com.mysql.jdbc.Driver"
  validationQuery="/* ping */ SELECT 1"