[SANDBOX-133] [pipeline] Numerous changes and updates for Java 1.5

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Component/s: Pipeline

Environment

Operating System: All
Platform: All

• Bugzilla Id: 32299
• Assignee: Unassigned
• Reporter: Kris Nuttycombe
• Created: 19/Nov/04 05:32
• Updated: 05/Jan/08 19:15
• Resolved: 05/Jan/08 19:15

Description

After some new use cases arose that I wasn't properly able to handle under my
initial contributed version of commons-pipeline, I've done a substantial rewrite
and added a "hello world" unit test to serve as an example of how to use the
library.

The primary intent of this rewrite is to remove the necessessity for classes
implementing StageHandler to extend a particular StageQueue implementation. It
also updates the package to be Java 1.5-centric, with the hope that future
updates can more readily use some of the new stuff in java.util.concurrent.
The StageQueue and StageHandler interfaces have been aggregated into the
abstract class Stage, and a new class, StageDriver, allows different threading
models and failure tolerance policies to be applied to Stage implementations.
Overall, it should be significantly cleaner.

I am submitting these changes through bugzilla because I don't yet have
committer permissions in the sandbox.

Due to the changes, and the youth of this project, there are some source files
that should be removed from the cvs repository as they're incompatible with the
API changes. These are:

src/java/org/apache/commons/pipeline/StageHandler.java
src/java/org/apache/commons/pipeline/StageQueue.java
src/java/org/apache/commons/pipeline/config/PipelineFactory.java
src/java/org/apache/commons/pipeline/impl/SingleThreadStageQueue.java

New and changed source files and test resources will be attached to this ticket.