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From "sandeep tandon" <sandeep_tan...@infosys.com>
Subject Problem Configuring Datasource With Tomcat !
Date Fri, 06 Aug 2004 16:00:00 GMT
Hi,

 

We are using eclipse with tomcat to deploy our web application that uses
oracle data source. Following steps were performed to get connection
pool:

 

1)                   Changes in server.xml of tomcat , added these lines
in application context

<Resource name="jdbc/JOBS_DataSource" auth="Container"
type="javax.sql.DataSource"/> 

 

<ResourceParams name="jdbc/JOBS_DataSource">

  <parameter>

    <name>factory</name>

    <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>

  </parameter>

  <parameter>

    <name>driverClassName</name>

    <value>oracle.jdbc.driver.OracleDriver</value>

  </parameter>

  <parameter>

    <name>url</name>

    <value>jdbc:oracle:thin:@150.235.31.48:1521:EHRS</value>

  </parameter>

  <parameter>

    <name>username</name>

    <value>jasadm</value>

  </parameter>

  <parameter>

    <name>password</name>

    <value>jasadm</value>

  </parameter>

  <parameter>

    <name>maxActive</name>

    <value>20</value>

  </parameter>

  <parameter>

    <name>maxIdle</name>

    <value>10</value>

  </parameter>

  <parameter>

    <name>maxWait</name>

    <value>-1</value>

  </parameter>

</ResourceParams>

 

 

2)                   Changes in web.xml of application, added these
lines

      <resource-ref>

             <description>JOBS Datasource</description>

             <res-ref-name>jdbc/JOBS_DataSource</res-ref-name>

             <res-type>javax.sql.DataSource</res-type>

             <res-auth>Container</res-auth>

      </resource-ref>

 

3)                   Used two different approaches in code to access the
datasource

First -    

java.util.Hashtable props = new java.util.Hashtable();

props.put(javax.naming.InitialContext.INITIAL_CONTEXT_FACTORY,
"org.apache.commons.dbcp.BasicDataSourceFactory");

      javax.naming.InitialContext context = new
javax.naming.InitialContext(props);

Object dataSourceObject = context.lookup("jdbc/JOBS_DataSource");

      myDataSource =
(DataSource)javax.rmi.PortableRemoteObject.narrow(dataSourceObject,
DataSource.class);

 

//third line throws naming exception - Cannot instantiate class:
org.apache.commons.dbcp.BasicDataSourceFactory

 

Second-

            javax.naming.InitialContext initContext = new
InitialContext();

            Context envContext  =
(Context)initContext.lookup("java:/comp/env");

      Object dataSourceObject =
envContext.lookup("jdbc/JOBS_DataSource");

//last line throws errors -> Source not found for
NamingContext.lookup(String) line: 197

//Source not found for BasicDataSource.getConnection(String, String)
line: 532

Have placed the required commons-dbcp.jar ,commons-pool.jar ,
commons-collection.jar, classes12.jar in <tomcat-install-dir>\common\lib
folder.

Any help in this regard will be highly appreciated.

 

Thanks & Regards,

Sandeep Tandon

JOBS - CSPD

C-09 / X-6165

 

 


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