Example usage for org.apache.commons.scxml2.env.jexl JexlContext JexlContext

Introduction

In this page you can find the example usage for org.apache.commons.scxml2.env.jexl JexlContext JexlContext.

Prototype

public JexlContext() 

Source Link

Document

Constructor.

Usage

From source file:it.polito.elite.dog.drivers.appliances.base.ApplianceDriverInstance.java

private void initializeDeviceStateMachine() {
    // check if all needed elements are initialized
    if ((this.deviceSerial != null) && (!this.deviceSerial.isEmpty()) && (this.stateMachineLocator != null)) {
        // get the device-specific state machine URL, if any available
        URL stateMachineURL = this.stateMachineLocator.getStateMachine(this.deviceSerial);

        // check not null
        if (stateMachineURL != null) {
            try {
                // get the SCXML state machine (SCXML root element)
                this.stateMachine = SCXMLReader.read(stateMachineURL);

                // build a new executor
                this.executor = new SCXMLExecutor(new JexlEvaluator(), new SimpleDispatcher(),
                        new SimpleErrorReporter());

                //set a scheduler dispatcher to handle delayed events
                this.executor.setEventdispatcher(new SimpleScheduler(this.executor));

                // set the state machine
                this.executor.setStateMachine(this.stateMachine);

                // set the root context
                JexlContext context = new JexlContext();

                // set the executor context
                this.executor.setRootContext(context);

                // add this class as listener of the state machine changes
                this.executor.addListener(this.stateMachine, this);

                // start the engine
                this.executor.go();
            } catch (IOException | ModelException | XMLStreamException e) {
                // log the error and continue if possible
                this.logger.log(LogService.LOG_ERROR,
                        "Error while creating the state machine executor associated to this driver instance",
                        e);/* w  w w  . ja  v a 2  s . c  o m*/
            }

        }
    }

}

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