Example usage for org.springframework.messaging Message getHeaders

List of usage examples for org.springframework.messaging Message getHeaders

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Introduction

In this page you can find the example usage for org.springframework.messaging Message getHeaders.

Prototype

MessageHeaders getHeaders();

Source Link

Document

Return message headers for the message (never null but may be empty).

Usage

From source file:org.springframework.yarn.support.statemachine.AbstractStateMachine.java

private void processEventQueue() {
    log.debug("Process event queue");
    Message<E> queuedEvent = null;
    while ((queuedEvent = eventQueue.poll()) != null) {
        Message<E> defer = null;// w ww.j a  va  2s.c  o m
        for (Transition<S, E> transition : transitions) {
            State<S, E> source = transition.getSource();
            State<S, E> target = transition.getTarget();
            Trigger<S, E> trigger = transition.getTrigger();
            if (source.equals(currentState)) {
                if (trigger != null && trigger.evaluate(queuedEvent.getPayload())) {
                    transition.transit(queuedEvent.getHeaders());
                    if (transition.getKind() != TransitionKind.INTERNAL) {
                        switchToState(target);
                    }
                    break;
                } else if (source.getDeferredEvents() != null
                        && source.getDeferredEvents().contains(queuedEvent.getPayload())) {
                    defer = queuedEvent;
                }
            }
        }
        if (defer != null) {
            log.info("Deferring event " + defer);
            deferList.addLast(defer);
        }
    }
}

From source file:org.springframework.yarn.support.statemachine.AbstractStateMachine.java

private void processDeferList() {
    log.debug("Process defer list");
    ListIterator<Message<E>> iterator = deferList.listIterator();
    while (iterator.hasNext()) {
        Message<E> event = iterator.next();
        for (Transition<S, E> transition : transitions) {
            State<S, E> source = transition.getSource();
            State<S, E> target = transition.getTarget();
            Trigger<S, E> trigger = transition.getTrigger();
            if (source.equals(currentState)) {
                if (trigger != null && trigger.evaluate(event.getPayload())) {
                    transition.transit(event.getHeaders());
                    if (transition.getKind() != TransitionKind.INTERNAL) {
                        switchToState(target);
                    }/*  www. j  a va 2  s .  com*/
                    iterator.remove();
                }
            }
        }
    }
}