How to get a EAR package for deploying without local data-source setting in JDev9i?

Question

Hi all,
I want to use pooled data-sources defined in OC4J's global configuration setting directory in JDEV_HOME\j2ee\home\config.
But when I packaged my application to an EAR file,it contains it's local data-sources.xml file in the package.Each time the server was restared,the local data-sources.xml file was overwritten by the originally setting in the EAR package,thus I cannot use the pooled settings.
So could let me know how to package a EAR file without containing it's local data-source setting,but use the global data-source setting?Or how to control the local data-source setting without changed after mannully defined.
Your reply is greatly appreciated!
Regards,
Robbin Woo

Answer 1

Mike,
You don't need a File to do what you want. Even if you could, it would be wrong to use a file.
It would be wrong, because the compiler might not by using a JavaFileManager that is actually backed by a filesystem. It could be backed by some form of repository such as a database, or it could be backed by a transient in memory file system ( An example of the latter is the [annotation processor test framework|https://hickory.dev.java.net/nonav/apidocs/index.html?net/java/dev/hickory/testing/package-summary.html] in hickory)
But probably of more interest to you, you don't need to because you can simply [get an InputStream|http://java.sun.com/javase/6/docs/api/javax/tools/FileObject.html#openInputStream()] from the FileObject returned from [filer.getResource(...)|http://java.sun.com/javase/6/docs/api/javax/annotation/processing/Filer.html#getResource(javax.tools.JavaFileManager.Location,%20java.lang.CharSequence,%20java.lang.CharSequence)] and read it.
You might also find the [Compiler Tree API|http://java.sun.com/javase/6/docs/jdk/api/javac/tree/index.html] useful. The Compiler Tree API is available to annotation processors running in Oracle's (Sun's) javac, but not in other compilers (possibly limiting portability).
With this API you can [convert |http://java.sun.com/javase/6/docs/jdk/api/javac/tree/com/sun/source/util/Trees.html#getPath(javax.lang.model.element.Element)] the Element representing the annotation to a Treepath then [get the leaf node|http://java.sun.com/javase/6/docs/jdk/api/javac/tree/com/sun/source/util/TreePath.html#getLeaf()] and from that tree [obtain its offsets|http://java.sun.com/javase/6/docs/jdk/api/javac/tree/com/sun/source/util/Trees.html#getSourcePositions()] within the source file.
Bruce