[ http://issues.apache.org/jira/browse/DERBY-930?page=all ]
Rick Hillegas updated DERBY-930:
--------------------------------
Attachment: ClassloadingTest.jar
I have attached a jarred up experiment which demonstrates a
SecurityManager-induced classloading issue which results in the silent failure
to autoload the jdbc driver. The autoloading logic is using the thread context
class loader to look in the classpath for all resources with the name
META-INF/services/java.sql.Driver. If you run with a SecurityManager, the
thread context class loader only finds one META-INF/services/java.sql.Driver,
namely, the one in the jar file which contains the calling code. However, if
you don't run with a SecurityManager, then the thread context class loader
finds many META-INF/services/java.sql.Driver(s), one in each jar file on the
classpath.
The experiment contains the following files:
o A.jar - Jar file holding the calling program and its own
META-INF/services/java.sql.Driver
o B.jar - Jar file containing another META-INF/services/java.sql.Driver
o AB.policy - Security policy for both jar files
o autoloadslim - Driving script which runs the application both with and
without a SecurityManager
o AutoloadClassloader.java - The application which looks for
META-INF/services/java.sql.Driver using the thread context class loader
> Add support for autoloading of Derby client drivers
> ---------------------------------------------------
>
> Key: DERBY-930
> URL: http://issues.apache.org/jira/browse/DERBY-930
> Project: Derby
> Type: New Feature
> Reporter: Rick Hillegas
> Assignee: Rick Hillegas
> Attachments: ClassloadingTest.jar, bug930.diff, bug930_problem.diff,
> bug930_problem2.diff
>
> Write Derby's driver names into the correct spot in derby.jar and
> derbyclient.jar so that the 1.6 vm autoloads Derby drivers. Section 10.2.1 of
> the JDBC4 spec describes the details.
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