Scripted Rule Support

Scripted Rule Support

While there is no proper documentation yet available, I though it's a good idea to collect some knowledge here as a start.

Further readings with much more advanced examples:

• https://github.com/smerschjohann/docker-oh2-jsr223
• https://github.com/steve-bate/openhab2-jython
• https://github.com/lewie/openhab2-javascript

Install in nightly openHAB 2 Build

• Install Build
• Create the directory [openHAB-folder]/conf/automation/jsr223 and copy your scripts into it.
• Run openHAB and install Rule Engine (Experimental)

Install in IDE

This is how I got the scripted rule support running within the IDE.

Include the following bundles in the launch config:

org.eclipse.smarthome.automation.module.core
org.eclipse.smarthome.automation.api
org.eclipse.smarthome.automation.provider.file
org.eclipse.smarthome.automation.rest
org.eclipse.smarthome.automation.module.script.rulesupport
org.eclipse.smarthome.automation.module.timer
org.eclipse.smarthome.automation.providers
org.eclipse.smarthome.automation.parser.gson
org.eclipse.smarthome.automation.core
org.eclipse.smarthome.automation.module.script

Add this as a VM argument in the launch config: [openHAB-folder]/runtime/bin/[setenv|setenv.bat]

-Dorg.osgi.framework.bundle.parent=ext 

Scripts are searched for in conf/automation/jsr223.

JavaScript

The following example.js worked for me:

'use strict';

scriptExtension.importPreset("RuleSupport");
scriptExtension.importPreset("RuleSimple");

var sRule = new SimpleRule(){
    execute: function( module, input){
        print("Hello World from JavaScript");
    }
};

sRule.setTriggers([
        new Trigger(
            "aTimerTrigger", 
            "timer.GenericCronTrigger", 
            new Configuration({
                "cronExpression": "0/15 * * * * ?"
            })
        )
    ]);

automationManager.addRule(sRule);

Jython

Download jython-standalone-x.y.z.jar from http://www.jython.org/downloads.html

Add this library to the "Bootstrap entries" on the main page of the launch config by simply putting it with its full path there.

The following example.py worked for me:

scriptExtension.importPreset("RuleSupport")
scriptExtension.importPreset("RuleSimple")


class myRule(SimpleRule):
    def execute(self, module, inputs):
        print "Hello World from Jython"

sRule = myRule()
sRule.setTriggers([Trigger("aTimerTrigger", "timer.GenericCronTrigger", Configuration({"cronExpression": "0/15 * * * * ?"}))])

automationManager.addRule(sRule)