An example/template implementation of a Cloudify plugin written in Java.
This example plugin is meant to be a starting point for those interested in developing Cloudify plugins in Java. There are some simplifying assumptions:
- the Java code is contained in an executable jar package in the plugin directory named "plugin.jar"
- cloudify operations are implemented in the Java project as instances of Operation implementations. These are referenced by class name in the plugin.yaml operations mapping.
- there is a little framework code in Java to bridge to the Cloudify context.
- the Cloudify context is accessed from Java using the context proxy, similar to the script plugin. This means all strings in and out.
- it is assumed that the target platform already has Java installed.
- the result from the Context object is a JSON formatted string. The example shows parsing it for values.
To run the example, you just need a Cloudify CLI ( pip install cloudify):
- install a java jdk
- cd to the example directory
- run
cfy init -r local-blueprint.yaml --install-plugins - run
cfy exe start install -b <directory>
The example just shows the operation calling the Java code, and accessing the proxy object to set a runtime property and use Cloudify logging.
To rebuild the java jar, install Apache Maven, and run 'mvn package'. The resulting target/*jar-with-dependencies.jar file can be renamed 'plugin.jar' and placed in the plugin package.