Install resource
adapters in your applications so they
can access outside data sources.
Before you begin
The JCA Version 1.6 specification adds support for Java annotations in RAR modules.
Procedure
- Assemble an application with RAR modules in it.
See the
topic Assembling applications for more information.
-
Install the application. Follow the steps in the topic
Installing a new application.
In the Map modules to servers step, specify target servers or clusters for
each RAR file. Be sure to map all other modules that use the resource adapters defined in the RAR
modules to the same targets. Also, specify the web servers as targets that serve as routers for
requests to this application. The plug-in configuration file (plugin-cfg.xml)
for each web server is generated based on the applications that are routed through it.
In the Metadata for modules step of installing an application, you can set
or unset the metadata-complete flag as discussed in the topic, JCA 1.6 support for annotations in
RAR modules.
Note: When installing a RAR file on a server, the application server looks for the manifest
(MANIFEST.MF) for the connector module. The application server first looks for the RAR file's
connectorModule.jar file and loads the manifest from the
connectorModule.jar file. If the class path entry is in the manifest from the
connectorModule.jar file, the RAR uses that class path.
To ensure that the
installed connector module finds the classes and resources that it needs, check the Class path
setting for the RAR using the administrative console. For more information on how to check this
setting, see the topics Resource adapter settings and WebSphere relational resource adapter
settings.
- Click Finish > Save to save the
changes.
- Create connection factories for the
newly installed application.
Results
Note: A given native
library can only be loaded
one time for each instance of the Java™ virtual
machine (JVM). Because each application has its own class loader,
separate applications with embedded RAR files cannot both use the
same native library. The second application receives an exception
when it tries to load the library.
If any application deployed on
the application server uses an embedded RAR file that includes native
path elements, then you must always ensure that you shut down the
application server cleanly, with no outstanding transactions. If the
application server does not shut down cleanly it performs recovery upon
server restart and loads any required RAR files and native libraries.
On completion of recovery, do not attempt any application-related
work. Shut down the server and restart it. No further recovery is
attempted by the application server on this restart, and normal application
processing can proceed.