i am using orcale, mysql databases , if i use context.xml i can get datasource for only one db

please help me

i am using orcale, mysql databases for two different web applications , i am executing both applications simultaneously if i specify in context.xml ,i can get datasource object only for one db(either oracle or mysql).

Can you tell why don't you want to do a lookup. When you declare a datasource using context.xml in apache tomcat, then it is added as a JNDI resource. I don't think you can retrieve it using anything other than lookup...

The whole point of DataSource is to be used through JNDI. If you're set on not using JNDI (why?) you might just as well use DriverManager.

how to get datasource object in tomcat without using jndi for oracle/mysql

Well for Oracle, you can use Class oracle.jdbc.pool.OracleDataSource and OracleXADataSource can be used.
1) create object of OracleDatasource
2) set the connection parameters (DB details) and get connection.