I have developed a small web-based aplication. I use an ant build script
to compile it and to generate a war. The application is used in several
servers with different settings (it uses different databases, connects to
different xml-rpc resources...) so it has to somehow read the
configuration from the server environment.
I have used the tomcat Web server administration tool to set Resources - a
data source and several Environment Entries. The tool regenerates
server.xml file in such a manner:
<Server>
...
<GlobalNamingResources>
<Environment description="" name="BLAH_USER" type="
java.lang.String"
value="MrSpock"/>
...
</GlobalNamingResources>
...
</Srver>
Then I change my deployment descriptor get access to this environment:
<web-app>
...
<resource-env-ref>
<resource-env-ref-name>BLAh_USER</resource-env-ref-name>
<resource-env-ref-type>
java.lang.String</resource-env-ref-type>
</resource-env-ref>
...
</web-app>
The code, that tryes to read this environmnt looks like this:
Context initCtx = new InitialContext();
Context envCtx = (Context) initCtx.lookup("java:comp/env");
String res_user = (String) envCtx.lookup("BLAH_USER");
The problem is, that I get this exception:
javax.naming.NamingException: Cannot create resource instance
at
org.apache.naming.factory.ResourceEnvFactory.getObjectInstance (
ResourceEnvFactory.java:146)
at
javax.naming.spi.NamingManager.getObjectInstance (
NamingManager.java:301)
at
org.apache.naming.NamingContext.lookup (
NamingContext.java:837)
at
org.apache.naming.NamingContext.lookup (
NamingContext.java:197)
at myapp.servlets.MyAppListener.contextInitialized(MyAppListener.java:123)
When I try to access a mapped JDBC resource everything seems to be OK.
When I list (NamingEnumeration enum = initCtx.list("java:comp/env");) the
keys for mapped resources BLAH_USER appears.
I have tried look this situation in the Tomcat documentation and to google
it, but I haven't get any reasonable idea to solve it.
--
S pozdravem
Ondrej Nekola
ondra@(protected)
http://www.matfyz.cz/ondra
ICQ# 160692888
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