Problem with finding data-source

Question

I get the following exception: javax.naming.NameNotFoundException: jdbc/localDatabaseDS not found
when i try to initiate my ds (datasource). Does anybody know what to do?
class =
import java.sql.Connection;
import java.sql.SQLException;
import javax.sql.DataSource;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.naming.NameNotFoundException;
* This class handles handles the connectionpool business <br>
* @author Taeke de Jong
public class DbConnectionPool {
private DataSource ds = null;
* constructor with datasource from JNDI
public DbConnectionPool(String dataSource)
try {
Context context = new InitialContext();
ds = (DataSource) context.lookup('jdbc/localDatabaseDS');
catch(NameNotFoundException nox) {System.out.println(nox.toString());}
catch(NamingException nex) {System.out.println(nex.toString());}
web.xml =
<servlet>
<servlet-name>DbConnectionServlet_2</servlet-name>
<servlet-class>minlnv.ifw.common.connection.DbConnectionServlet</servlet-class>
<init-param>
<param-name>databaseName</param-name>
<param-value>localDatabase</param-value>
</init-param>
<init-param>
<param-name>dataSource</param-name>
<param-value>jdbc/localDatabaseDS</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
<resource-ref>
<description>JNDI DataSource localDatabase IFW</description>
<res-ref-name>jdbc/localDatabaseDS</res-ref-name>
<res-type>javax.sql.Datasource</res-type>
<res-auth>APPLICATION</res-auth>
</resource-ref>
data-sources.xml =
<data-source class="com.evermind.sql.DriverManagerDataSource"
connection-driver="oracle.jdbc.driver.OracleDriver"
ejb-location="jdbc/localDatabaseDS"
inactivity-timeout="30"
location="jdbc/localDataseCorDS"
name="localDatabase"
pooled-location="jdbc/localDatabasePooledDS"
url="jdbc:oracle:thin:@10.160.140.30:1521:ifwt"
// left out password and username
min-connections="7" max-connections="10" connection-retry-interval="1" xa-location="jdbc/xa/OracleXADS"
/>

Answer 1

Do not use the "hardcoded" examples from the book. Check the deployed data-sources and use them as parameter calling lookup method.
The following have been tested using a simple servlet with Jdeveloper 9.0.5.2 but I think other Jdeveloper/OC4J versions work similar.
My application is called ds.
The following command lists the datasources which are deployed with the application.
I ran the following command against the %JDEV_HOME%\j2ee\home standalone OC4J server but it should work against the embedded OC4J server too.
Here is the command to list the available datasources:
C:\jdev9052\j2ee\home>\jdk142_04\bin\java -jar admin.jar ormi://localhost admin welcome -application ds -dataSourceInfo
And here is the output of the command.
DataSource info:
com.evermind.sql.DriverManagerXADataSource/ds/jdbc/xa/BookDBXADS - cached: 0 used: 0 total: 0
com.evermind.sql.OrionPooledDataSource/ds/jdbc/BookDBPooledDS - cached: 0 used: 0 total: 0
com.evermind.sql.OrionCMTDataSource/ds/jdbc/BookDBDS - cached: 0 used: 0 total: 0
com.evermind.sql.DriverManagerXADataSource/ds/jdbc/xa/DEVXADS - cached: 0 used: 0 total: 0
com.evermind.sql.OrionPooledDataSource/ds/jdbc/DEVPooledDS - cached: 1 used: 0 total: 1
com.evermind.sql.OrionCMTDataSource/ds/jdbc/DEVDS - cached: 1 used: 0 total: 1
ds = ds my application
jdbc/DEVDS = string parameter used in lookup method
jdbc/DEVPooledDS = string parameter used in lookup method
Checking the j2ee application directory we can find the same:
C:\>dir C:\jdev9052\j2ee\home\applications\ds\META-INF
Volume in drive C has no label.
Volume Serial Number is A83F-C94A
Directory of C:\jdev9052\j2ee\home\applications\ds\META-INF
08/12/2004 10:14 AM <DIR> .
08/12/2004 10:14 AM <DIR> ..
08/12/2004 10:14 AM 395 application.xml
08/12/2004 10:14 AM 933 data-sources.xml
08/12/2004 10:14 AM 283 orion-application.xml
3 File(s) 1,611 bytes
2 Dir(s) 10,078,003,200 bytes free
The orion-application.xml points the data-sources.xml file in the same directory. ds application uses the datasources which are listed in this file, not data-sources.xml in C:\jdev9052\j2ee\home\config directory.
And here is the content of C:\jdev9052\j2ee\home\applications\ds\META-INF\data-sources.xml
C:\>more C:\jdev9052\j2ee\home\applications\ds\META-INF\data-sources.xml
<?xml version = '1.0' encoding = 'windows-1252'?>
<!DOCTYPE data-sources PUBLIC "Orion data-sources" "http://xmlns.oracle.com/ias/dtds/data-sources.dtd">
<data-sources>
<data-source name="jdev-connection-BookDB" class="com.evermind.sql.DriverManagerDataSource" location="jdbc/BookDBCoreDS" x
a-location="jdbc/xa/BookDBXADS" ejb-location="jdbc/BookDBDS" pooled-location="jdbc/BookDBPooledDS" connection-driver="oracle
.jdbc.driver.OracleDriver" username="myname" password="mypw" url="jdbc:oracle:thin:@122.118.222.17:1521:DXX" inactivity-timeout
="30"/>
<data-source name="jdev-connection-DEV" class="com.evermind.sql.DriverManagerDataSource" location="jdbc/DEVCoreDS" xa-loca
tion="jdbc/xa/DEVXADS" ejb-location="jdbc/DEVDS" pooled-location="jdbc/DEVPooledDS" connection-driver="oracle.jdbc.driver.Or
acleDriver" username="myname" password="mypw" url="jdbc:oracle:thin:@122.118.222.17:1521:DXX" inactivity-timeout="30"/>
</data-sources>
...location="jdbc/DEVDS"
or
...location="jdbc/BookDBPooledDS"
The lookup method needs the string(s) above (between "")