Example: WhiteboardPattern with Java 8

An example implementation of the whiteboard pattern with Java 8 and OSGi declarative services annotations.

You need an Eclipse with the Declarative Services Annotations Support Plug-In to make the annotations work.

Running the example

• Import the 4 projects
• de.elinja.whiteboard.api
• de.elinja.whiteboard.numberproducer
• de.elinja.whiteboard.printer.bin
• de.elinja.whiteboard.printer.hex into your Eclipse workspace.
• In project de.elinja.whiteboard.numberproducer: Right-click WhiteboardPatternExample.launch in and select Run As WhiteboardPatternExample

The output of the sample should be

Sending no. 4711 to printers:

Hex => 1267
Bin => 1001001100111
Done.

Links

• My description of the whiteboard pattern and this example
• The Whitepaper Listeners Considered Harmful: The “Whiteboard” Pattern from the OSGi alliance
• JavaDoc of OSGi declarative services annotation
• JavaDoc of BundleTracker