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

Introduction

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

Prototype

public JexlEvaluator() 

Source Link

Document

Constructor.

Usage

From source file:com.github.woonsan.commons.scxml.examples.helloworld.Main.java

public static void main(String[] args) throws Exception {
    // evaluator instance which is used by SCXML engine to evaluate expressions in SCXML
    Evaluator evaluator = new JexlEvaluator();
    // engine to execute the scxml instance
    SCXMLExecutor executor = new SCXMLExecutor(evaluator, null, new SimpleErrorReporter());

    // parse SCXML URL into SCXML model
    SCXML scxml = SCXMLReader.read(SCXML);
    // set state machine (scxml instance) to execute
    executor.setStateMachine(scxml);/*from w  w w. java 2s  . c  om*/

    // create root context storing variables and being used by evaluator
    Context rootContext = evaluator.newContext(null);
    // set the root context for the engine
    executor.setRootContext(rootContext);

    // initiate the execution of the state machine
    executor.go();
}

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From source file:com.github.woonsan.commons.scxml.examples.stopwatch.Main.java

public static void main(String[] args) throws Exception {
    // evaluator instance which is used by SCXML engine to evaluate expressions in SCXML
    Evaluator evaluator = new JexlEvaluator();
    // engine to execute the scxml instance
    SCXMLExecutor executor = new SCXMLExecutor(evaluator, null, new SimpleErrorReporter());

    // parse SCXML URL into SCXML model
    SCXML scxml = SCXMLReader.read(SCXML);
    // set state machine (scxml instance) to execute
    executor.setStateMachine(scxml);/*from  ww  w  .j  a va  2s. com*/

    // create root context storing variables and being used by evaluator
    Context rootContext = evaluator.newContext(null);

    // create stopWatch object and add it to rootContext
    // to be able to script with that in SCXML.
    StopWatch stopWatch = new StopWatch();
    rootContext.set("stopWatch", stopWatch);

    // set the root context for the engine
    executor.setRootContext(rootContext);

    // initiate the execution of the state machine
    executor.go();

    new StopWatchFrame(executor);
}

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From source file:StandaloneJexlExpressions.java

/**
 * Launcher.//from   w  w  w. j ava2  s . co  m
 * @param args The arguments, one expected, the URI or filename of the
 *             SCXML document
 */
public static void main(final String[] args) {
    if (args.length < 1) {
        System.out.println("USAGE: java " + StandaloneJexlExpressions.class.getName() + "<url|filename>");
        System.exit(-1);
    }
    Evaluator evaluator = new JexlEvaluator();

    StandaloneUtils.execute(args[0], evaluator);

}

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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);/*from  w w  w . j  a v  a 2  s .c o m*/
            }

        }
    }

}

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