# Package org.apache.tomcat.dbcp.dbcp2.cpdsadapter

package org.apache.tomcat.dbcp.dbcp2.cpdsadapter

This package contains one public class which is a `ConnectionPoolDataSource` (CPDS) implementation that can be used to adapt older `Driver` based JDBC implementations. Below is an example of setting up the CPDS to be available via JNDI in the catalina servlet container.

In server.xml, the following would be added to the <Context> for your webapp:

      <Resource name="jdbc/bookstoreCPDS" auth="Container"
                 type="org.apache.tomcat.dbcp.dbcp2.cpdsadapter.DriverAdapterCPDS"/>
       <ResourceParams name="jdbc/bookstoreCPDS">
         <parameter>
           <name>factory</name>
           <value>org.apache.tomcat.dbcp.dbcp2.cpdsadapter.DriverAdapterCPDS</value>
         </parameter>
             <parameter><name>user</name><value>root</value></parameter>
             <parameter><name>password</name><value></value></parameter>
             <parameter>
                 <name>driver</name>
                 <value>org.gjt.mm.mysql.Driver</value></parameter>
             <parameter>
                  <name>url</name>
                  <value>jdbc:mysql://localhost:3306/bookstore</value>
             </parameter>
       </ResourceParams>

In web.xml. Note that elements must be given in the order of the dtd described in the servlet specification:

     <resource-ref>
       <description>
         Resource reference to a factory for java.sql.Connection
         instances that may be used for talking to a particular
         database that is configured in the server.xml file.
       </description>
       <res-ref-name>
         jdbc/bookstoreCPDS
       </res-ref-name>
       <res-type>
         org.apache.tomcat.dbcp.dbcp2.cpdsadapter.DriverAdapterCPDS
       </res-type>
       <res-auth>
         Container
       </res-auth>
     </resource-ref>

Catalina deploys all objects configured similarly to above within the java:comp/env namespace.

- Related Packages
  Package
  Description
  org.apache.tomcat.dbcp.dbcp2
  Database Connection Pool API.
  org.apache.tomcat.dbcp.dbcp2.datasources
  This package contains two DataSources: `PerUserPoolDataSource` and `SharedPoolDataSource` which provide a database connection pool.
  org.apache.tomcat.dbcp.dbcp2.managed
  This package provides support for pooling of ManagedConnections.
- Classes
  Class
  Description
  DriverAdapterCPDS
  An adapter for JDBC drivers that do not include an implementation of `ConnectionPoolDataSource`, but still include a `DriverManager` implementation.
  PStmtKeyCPDS
  Deprecated.
  Use `PStmtKey`.