Package org.apache.mina.statemachine.context

Examples of org.apache.mina.statemachine.context.StateContext

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     * proxy using this method.
     *
     * @param event the {@link Event} to be handled.
     */
    public void handle(Event event) {
        StateContext context = event.getContext();

        synchronized (context) {
            LinkedList<Event> eventQueue = eventQueueThreadLocal.get();
            eventQueue.addLast(event);

            if (processingThreadLocal.get()) {
                /*
                 * This thread is already processing an event. Queue this
                 * event.
                 */
                if (log.isDebugEnabled()) {
                    log.debug("State machine called recursively. Queuing event " + event
                            + " for later processing.");
                }
            } else {
                processingThreadLocal.set(true);
                try {
                    if (context.getCurrentState() == null) {
                        context.setCurrentState(startState);
                    }
                    processEvents(eventQueue);
                } finally {
                    processingThreadLocal.set(false);
                }
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    }

    private void processEvents(LinkedList<Event> eventQueue) {
        while (!eventQueue.isEmpty()) {
            Event event = eventQueue.removeFirst();
            StateContext context = event.getContext();
            handle(context.getCurrentState(), event);
        }
    }
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            handle(context.getCurrentState(), event);
        }
    }
   
    private void handle(State state, Event event) {
        StateContext context = event.getContext();

        for (Transition t : state.getTransitions()) {
            if (log.isDebugEnabled()) {
                log.debug("Trying transition " + t);
            }

            try {
                if (t.execute(event)) {
                    if (log.isDebugEnabled()) {
                        log.debug("Transition " + t + " executed successfully.");
                    }
                    setCurrentState(context, t.getNextState());

                    return;
                }
            } catch (BreakAndContinueException bace) {
                if (log.isDebugEnabled()) {
                    log.debug("BreakAndContinueException thrown in "
                            + "transition " + t
                            + ". Continuing with next transition.");
                }
            } catch (BreakAndGotoException bage) {
                State newState = getState(bage.getStateId());

                if (bage.isNow()) {
                    if (log.isDebugEnabled()) {
                        log.debug("BreakAndGotoException thrown in "
                                + "transition " + t + ". Moving to state "
                                + newState.getId() + " now.");
                    }
                    setCurrentState(context, newState);
                    handle(newState, event);
                } else {
                    if (log.isDebugEnabled()) {
                        log.debug("BreakAndGotoException thrown in "
                                + "transition " + t + ". Moving to state "
                                + newState.getId() + " next.");
                    }
                    setCurrentState(context, newState);
                }
                return;
            } catch (BreakAndCallException bace) {
                State newState = getState(bace.getStateId());

                Stack<State> callStack = getCallStack(context);
                State returnTo = bace.getReturnToStateId() != null
                    ? getState(bace.getReturnToStateId())
                    : context.getCurrentState();
                callStack.push(returnTo);

                if (bace.isNow()) {
                    if (log.isDebugEnabled()) {
                        log.debug("BreakAndCallException thrown in "
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            args = args == null ? EMPTY_ARGUMENTS : args;
            if (interceptor != null) {
                args = interceptor.modify(args);
            }

            StateContext context = contextLookup.lookup(args);

            if (context == null) {
                if (ignoreStateContextLookupFailure) {
                    return null;
                }
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                map.put("context", context);
            }
        };
        Object[] args1 = new Object[] {new Object(), map, new Object()};
        Object[] args2 = new Object[] {map, new Object()};
        StateContext sc = lookup.lookup(args1);
        assertSame(map.get("context"), sc);
        assertSame(map.get("context"), lookup.lookup(args1));
        assertSame(map.get("context"), lookup.lookup(args2));
    }
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                map.put("context", context);
            }
        };
        Object[] args1 = new Object[] {new Object(), map, new Object()};
        Object[] args2 = new Object[] {map, new Object()};
        StateContext sc = lookup.lookup(args1);
        assertSame(map.get("context"), sc);
        assertSame(map.get("context"), lookup.lookup(args1));
        assertSame(map.get("context"), lookup.lookup(args2));
    }
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    public void testBreakAndContinue() throws Exception {
        State s1 = new State("s1");
        s1.addTransition(new BreakAndContinueTransition("foo"));
        s1.addTransition(new SuccessTransition("foo"));

        StateContext context = new DefaultStateContext();
        StateMachine sm = new StateMachine(new State[] { s1 }, "s1");
        sm.handle(new Event("foo", context));
        assertEquals(true, context.getAttribute("success"));
    }
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        State s1 = new State("s1");
        State s2 = new State("s2");
        s1.addTransition(new BreakAndGotoNowTransition("foo", "s2"));
        s2.addTransition(new SuccessTransition("foo"));

        StateContext context = new DefaultStateContext();
        StateMachine sm = new StateMachine(new State[] { s1, s2 }, "s1");
        sm.handle(new Event("foo", context));
        assertEquals(true, context.getAttribute("success"));
    }
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        State s1 = new State("s1");
        State s2 = new State("s2");
        s1.addTransition(new BreakAndGotoNextTransition("foo", "s2"));
        s2.addTransition(new SuccessTransition("foo"));

        StateContext context = new DefaultStateContext();
        StateMachine sm = new StateMachine(new State[] { s1, s2 }, "s1");
        sm.handle(new Event("foo", context));
        assertSame(s2, context.getCurrentState());
        sm.handle(new Event("foo", context));
        assertEquals(true, context.getAttribute("success"));
    }
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    public void testBreakAndContinue() throws Exception {
        State s1 = new State("s1");
        s1.addTransition(new BreakAndContinueTransition("foo"));
        s1.addTransition(new SuccessTransition("foo"));

        StateContext context = new DefaultStateContext();
        StateMachine sm = new StateMachine(new State[] { s1 }, "s1");
        sm.handle(new Event("foo", context));
        assertEquals(true, context.getAttribute("success"));
    }
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Related Classes of org.apache.mina.statemachine.context.StateContext

  • org.apache.mina.statemachine.context.AbstractStateContextLookupTest
  • org.apache.mina.statemachine.StateMachine
  • org.apache.mina.statemachine.StateMachineProxyBuilder$MethodInvocationHandler
  • org.apache.mina.statemachine.StateMachineProxyFactory$MethodInvocationHandler
  • org.apache.mina.statemachine.StateMachineTest
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