Examples with ComponentEventException org.apache.tapestry5.runtime.ComponentEventException used on opensource projects

Example 1 with ComponentEventException

use of org.apache.tapestry5.runtime.ComponentEventException in project tapestry-5 by apache.

the class ComponentPageElementImpl method processEventTriggering.

@SuppressWarnings("all")
private boolean processEventTriggering(String eventType, EventContext context, ComponentEventCallback callback) {
    boolean result = false;
    ComponentPageElement component = this;
    String componentId = "";
    // Provide a default handler for when the provided handler is null.
    final ComponentEventCallback providedHandler = callback == null ? new NotificationEventCallback(eventType, completeId) : callback;
    ComponentEventCallback wrapped = new ComponentEventCallback() {

        public boolean handleResult(Object result) {
            if (result instanceof Boolean)
                return (Boolean) result;
            return providedHandler.handleResult(result);
        }
    };
    RuntimeException rootException = null;
    // Because I don't like to reassign parameters.
    String currentEventType = eventType;
    EventContext currentContext = context;
    // Track the location of the original component for the event, even as we work our way up
    // the hierarchy. This may not be ideal if we trigger an "exception" event ... or maybe
    // it's right (it's the location of the originally thrown exception).
    Location location = component.getComponentResources().getLocation();
    while (component != null) {
        try {
            Logger logger = component.getEventLogger();
            ComponentEvent event = new ComponentEventImpl(currentEventType, componentId, currentContext, wrapped, elementResources, exactParameterCountMatch, coreResources.getComponentModel(), logger);
            logger.debug(TapestryMarkers.EVENT_DISPATCH, "Dispatch event: {}", event);
            result |= component.dispatchEvent(event);
            if (event.isAborted())
                return result;
        }// not the JVM).
         catch (Exception ex) {
            if (rootException != null)
                throw rootException;
            // We know component is not null and therefore has a component resources that
            // should have a location.
            // Wrap it up to help ensure that a location is available to the event handler
            // method or,
            // more likely, to the exception report page.
            rootException = new ComponentEventException(ex.getMessage(), eventType, context, location, ex);
            // Switch over to triggering an "exception" event, starting in the component that
            // threw the exception.
            currentEventType = "exception";
            currentContext = createParameterContext(rootException);
            continue;
        }
        // On each bubble up, make the event appear to come from the previous component
        // in which the event was triggered.
        componentId = component.getId();
        component = component.getContainerElement();
    }
    if (rootException != null)
        throw rootException;
    return result;
}