Examples of org.apache.commons.scxml2.env.AbstractStateMachine

org.apache.commons.scxml2.env.SimpleSCXMLListener

This class demonstrates one approach for providing the base functionality needed by classes representing stateful entities, whose behaviors are defined via SCXML documents.

SCXML documents (more generically, UML state chart diagrams) can be used to define stateful behavior of objects, and Commons SCXML enables developers to use this model directly into the corresponding code artifacts. The resulting artifacts tend to be much simpler, embody a useful separation of concerns and are easier to understand and maintain. As the size of the modeled entity grows, these benefits become more apparent.

This approach functions by registering an SCXMLListener that gets notified onentry, and calls the namesake method for each state that has been entered.

This class swallows all exceptions only to log them. Developers of subclasses should think of themselves as "component developers" catering to other end users, and therefore ensure that the subclasses are free of ModelExceptions and the like. Most methods are protected for ease of subclassing.

     * @param nodeCtx The GroovyContext for this state.
     * @return The effective GroovyContext for the path leading up to
     *         document root.
     */
    private GroovyContext getEffectiveContext(final GroovyContext nodeCtx) {
        return new GroovyContext(new EffectiveContextMap(nodeCtx), this);
    }

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     * @param nodeCtx The JexlContext for this state.
     * @return The effective JexlContext for the path leading up to
     *         document root.
     */
    private JexlContext getEffectiveContext(final JexlContext nodeCtx) {
        return new JexlContext(new EffectiveContextMap(nodeCtx));
    }

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     */
    protected SCXMLExecutionContext(SCXMLIOProcessor externalIOProcessor, Evaluator evaluator,
                                    EventDispatcher eventDispatcher, ErrorReporter errorReporter) {
        this.externalIOProcessor = externalIOProcessor;
        this.evaluator = evaluator;
        this.eventdispatcher = eventDispatcher != null ? eventDispatcher : new SimpleDispatcher();
        this.errorReporter = errorReporter != null ? errorReporter : new SimpleErrorReporter();
        this.notificationRegistry = new NotificationRegistry();


        this.scInstance = new SCInstance(this, this.evaluator, this.errorReporter);
        this.actionExecutionContext = new ActionExecutionContext(this);

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     * Set or replace the event dispatch
     *
     * @param eventdispatcher The event dispatcher to set, if null a SimpleDispatcher instance will be used instead
     */
    protected void setEventdispatcher(EventDispatcher eventdispatcher) {
        this.eventdispatcher = eventdispatcher != null ? eventdispatcher : new SimpleDispatcher();
    }

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        } catch (IOException ioe) {
            throw new InvokerException(ioe.getMessage(), ioe.getCause());
        } catch (XMLStreamException xse) {
            throw new InvokerException(xse.getMessage(), xse.getCause());
        }
        executor = new SCXMLExecutor(evaluator, new SimpleDispatcher(), new SimpleErrorReporter());
        Context rootCtx = evaluator.newContext(null);
        for (Map.Entry<String, Object> entry : params.entrySet()) {
            rootCtx.setLocal(entry.getKey(), entry.getValue());
        }
        executor.setRootContext(rootCtx);

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            } catch (SAXException se) {
                throw new XMLStreamException("Failed to create SCXML Schema for validation", se);
            }


            Validator validator = schema.newValidator();
            validator.setErrorHandler(new SimpleErrorHandler());


            Source src = null;
            if (urlStream != null) {
                // configuration.encoding is ignored
                if (configuration.systemId != null) {

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    protected SCXMLExecutionContext(SCXMLIOProcessor externalIOProcessor, Evaluator evaluator,
                                    EventDispatcher eventDispatcher, ErrorReporter errorReporter) {
        this.externalIOProcessor = externalIOProcessor;
        this.evaluator = evaluator;
        this.eventdispatcher = eventDispatcher != null ? eventDispatcher : new SimpleDispatcher();
        this.errorReporter = errorReporter != null ? errorReporter : new SimpleErrorReporter();
        this.notificationRegistry = new NotificationRegistry();


        this.scInstance = new SCInstance(this, this.evaluator, this.errorReporter);
        this.actionExecutionContext = new ActionExecutionContext(this);
    }

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     * Set or replace the error reporter
     *
     * @param errorReporter The error reporter to set, if null a SimpleErrorReporter instance will be used instead
     */
    protected void setErrorReporter(ErrorReporter errorReporter) {
        this.errorReporter = errorReporter != null ? errorReporter : new SimpleErrorReporter();
        try {
            scInstance.setErrorReporter(errorReporter);
        }
        catch (ModelException me) {
            // won't happen

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        } catch (IOException ioe) {
            throw new InvokerException(ioe.getMessage(), ioe.getCause());
        } catch (XMLStreamException xse) {
            throw new InvokerException(xse.getMessage(), xse.getCause());
        }
        executor = new SCXMLExecutor(evaluator, new SimpleDispatcher(), new SimpleErrorReporter());
        Context rootCtx = evaluator.newContext(null);
        for (Map.Entry<String, Object> entry : params.entrySet()) {
            rootCtx.setLocal(entry.getKey(), entry.getValue());
        }
        executor.setRootContext(rootCtx);

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            executor.setStateMachine(scxml);
        }
        catch (ModelException me) {
            throw new InvokerException(me);
        }
        executor.addListener(scxml, new SimpleSCXMLListener());
        executor.registerInvokerClass("scxml", this.getClass());
        try {
            executor.go();
        } catch (ModelException me) {
            throw new InvokerException(me.getMessage(), me.getCause());

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Related Classes of org.apache.commons.scxml2.env.AbstractStateMachine

groovy.lang.Script

org.apache.commons.jexl2.Expression

org.apache.commons.jexl2.JexlEngine

org.apache.commons.logging.Log

org.apache.commons.scxml2.Context

org.apache.commons.scxml2.env.AbstractStateMachine

org.apache.commons.scxml2.env.EffectiveContextMap

org.apache.commons.scxml2.env.groovy.GroovyEvaluator

org.apache.commons.scxml2.env.javascript.JSEvaluator

org.apache.commons.scxml2.env.jexl.JexlContext

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