Example usage for org.springframework.statemachine.config.model.verifier CompositeStateMachineModelVerifier CompositeStateMachineModelVerifier

Introduction

In this page you can find the example usage for org.springframework.statemachine.config.model.verifier CompositeStateMachineModelVerifier CompositeStateMachineModelVerifier.

Prototype

public CompositeStateMachineModelVerifier() 

Source Link

Usage

From source file:org.springframework.statemachine.config.AbstractStateMachineFactory.java

/**
 * Main constructor that create a {@link StateMachine}.
 *
 * @param uuid for internal usage. Can be null, in that case a random one will be generated.
 * @param machineId represent a user Id, up to you to set what you want.
 * @return a {@link StateMachine}//from ww w  .  j a va  2  s  .c  o m
 */
@SuppressWarnings("unchecked")
public StateMachine<S, E> getStateMachine(UUID uuid, String machineId) {
    StateMachineModel<S, E> stateMachineModel = resolveStateMachineModel(machineId);
    if (stateMachineModel.getConfigurationData().isVerifierEnabled()) {
        StateMachineModelVerifier<S, E> verifier = stateMachineModel.getConfigurationData().getVerifier();
        if (verifier == null) {
            verifier = new CompositeStateMachineModelVerifier<S, E>();
        }
        verifier.verify(stateMachineModel);
    }

    // shared
    DefaultExtendedState defaultExtendedState = new DefaultExtendedState();

    StateMachine<S, E> machine = null;

    // we store mappings from state id's to states which gets
    // created during the process. This is needed for transitions to
    // find a correct mappings because they use state id's, not actual
    // states.
    final Map<S, State<S, E>> stateMap = new HashMap<S, State<S, E>>();
    Stack<MachineStackItem<S, E>> regionStack = new Stack<MachineStackItem<S, E>>();
    Stack<StateData<S, E>> stateStack = new Stack<StateData<S, E>>();
    Map<Object, StateMachine<S, E>> machineMap = new HashMap<Object, StateMachine<S, E>>();
    Map<S, StateHolder<S, E>> holderMap = new HashMap<S, StateHolder<S, E>>();

    Iterator<Node<StateData<S, E>>> iterator = buildStateDataIterator(stateMachineModel);
    while (iterator.hasNext()) {
        Node<StateData<S, E>> node = iterator.next();
        StateData<S, E> stateData = node.getData();
        StateData<S, E> peek = stateStack.isEmpty() ? null : stateStack.peek();

        // simply push and continue
        if (stateStack.isEmpty()) {
            stateStack.push(stateData);
            continue;
        }

        boolean stackContainsSameParent = false;
        Iterator<StateData<S, E>> ii = stateStack.iterator();
        while (ii.hasNext()) {
            StateData<S, E> sd = ii.next();
            if (stateData != null && ObjectUtils.nullSafeEquals(stateData.getState(), sd.getParent())) {
                stackContainsSameParent = true;
                break;
            }
        }

        if (stateData != null && !stackContainsSameParent) {
            stateStack.push(stateData);
            continue;
        }

        Collection<StateData<S, E>> stateDatas = popSameParents(stateStack);
        int initialCount = getInitialCount(stateDatas);
        Collection<Collection<StateData<S, E>>> regionsStateDatas = splitIntoRegions(stateDatas);
        Collection<TransitionData<S, E>> transitionsData = getTransitionData(iterator.hasNext(), stateDatas,
                stateMachineModel);

        if (initialCount > 1) {
            for (Collection<StateData<S, E>> regionStateDatas : regionsStateDatas) {
                machine = buildMachine(machineMap, stateMap, holderMap, regionStateDatas, transitionsData,
                        resolveBeanFactory(stateMachineModel), contextEvents, defaultExtendedState,
                        stateMachineModel.getTransitionsData(), resolveTaskExecutor(stateMachineModel),
                        resolveTaskScheduler(stateMachineModel), machineId, null, stateMachineModel);
                regionStack.push(new MachineStackItem<S, E>(machine));
            }

            Collection<Region<S, E>> regions = new ArrayList<Region<S, E>>();
            while (!regionStack.isEmpty()) {
                MachineStackItem<S, E> pop = regionStack.pop();
                regions.add(pop.machine);
            }
            S parent = (S) peek.getParent();
            RegionState<S, E> rstate = buildRegionStateInternal(parent, regions, null,
                    stateData != null ? stateData.getEntryActions() : null,
                    stateData != null ? stateData.getExitActions() : null,
                    new DefaultPseudoState<S, E>(PseudoStateKind.INITIAL));
            if (stateData != null) {
                stateMap.put(stateData.getState(), rstate);
            } else {
                // TODO: don't like that we create a last machine here
                Collection<State<S, E>> states = new ArrayList<State<S, E>>();
                states.add(rstate);
                Transition<S, E> initialTransition = new InitialTransition<S, E>(rstate);
                StateMachine<S, E> m = buildStateMachineInternal(states, new ArrayList<Transition<S, E>>(),
                        rstate, initialTransition, null, defaultExtendedState, null, contextEvents,
                        resolveBeanFactory(stateMachineModel), resolveTaskExecutor(stateMachineModel),
                        resolveTaskScheduler(stateMachineModel), beanName,
                        machineId != null ? machineId : stateMachineModel.getConfigurationData().getMachineId(),
                        uuid, stateMachineModel);
                machine = m;
            }
        } else {
            machine = buildMachine(machineMap, stateMap, holderMap, stateDatas, transitionsData,
                    resolveBeanFactory(stateMachineModel), contextEvents, defaultExtendedState,
                    stateMachineModel.getTransitionsData(), resolveTaskExecutor(stateMachineModel),
                    resolveTaskScheduler(stateMachineModel), machineId, uuid, stateMachineModel);
            if (peek.isInitial() || (!peek.isInitial() && !machineMap.containsKey(peek.getParent()))) {
                machineMap.put(peek.getParent(), machine);
            }
        }

        stateStack.push(stateData);
    }

    // setup autostart for top-level machine
    if (machine instanceof LifecycleObjectSupport) {
        ((LifecycleObjectSupport) machine)
                .setAutoStartup(stateMachineModel.getConfigurationData().isAutoStart());
    }

    // set top-level machine as relay
    final StateMachine<S, E> fmachine = machine;
    fmachine.getStateMachineAccessor().doWithAllRegions(new StateMachineFunction<StateMachineAccess<S, E>>() {

        @Override
        public void apply(StateMachineAccess<S, E> function) {
            function.setRelay(fmachine);
        }
    });

    // add monitoring hooks
    final StateMachineMonitor<S, E> stateMachineMonitor = stateMachineModel.getConfigurationData()
            .getStateMachineMonitor();
    if (stateMachineMonitor != null || defaultStateMachineMonitor != null) {
        fmachine.getStateMachineAccessor().doWithRegion(new StateMachineFunction<StateMachineAccess<S, E>>() {

            @Override
            public void apply(StateMachineAccess<S, E> function) {
                if (defaultStateMachineMonitor != null) {
                    function.addStateMachineMonitor(defaultStateMachineMonitor);
                }
                if (stateMachineMonitor != null) {
                    function.addStateMachineMonitor(stateMachineMonitor);
                }
            }
        });
    }

    // TODO: should error out if sec is enabled but spring-security is not in cp
    if (stateMachineModel.getConfigurationData().isSecurityEnabled()) {
        final StateMachineSecurityInterceptor<S, E> securityInterceptor = new StateMachineSecurityInterceptor<S, E>(
                stateMachineModel.getConfigurationData().getTransitionSecurityAccessDecisionManager(),
                stateMachineModel.getConfigurationData().getEventSecurityAccessDecisionManager(),
                stateMachineModel.getConfigurationData().getEventSecurityRule());
        log.info("Adding security interceptor " + securityInterceptor);
        fmachine.getStateMachineAccessor()
                .doWithAllRegions(new StateMachineFunction<StateMachineAccess<S, E>>() {

                    @Override
                    public void apply(StateMachineAccess<S, E> function) {
                        function.addStateMachineInterceptor(securityInterceptor);
                    }
                });
    }

    // setup distributed state machine if needed.
    // we wrap previously build machine with a distributed
    // state machine and set it to use given ensemble.
    if (stateMachineModel.getConfigurationData().getStateMachineEnsemble() != null) {
        DistributedStateMachine<S, E> distributedStateMachine = new DistributedStateMachine<S, E>(
                stateMachineModel.getConfigurationData().getStateMachineEnsemble(), machine);
        distributedStateMachine.setAutoStartup(stateMachineModel.getConfigurationData().isAutoStart());
        distributedStateMachine.afterPropertiesSet();
        machine = distributedStateMachine;
    }

    for (StateMachineListener<S, E> listener : stateMachineModel.getConfigurationData()
            .getStateMachineListeners()) {
        machine.addStateListener(listener);
    }

    // go through holders and fix state references which
    // were not known at a time holder was created
    for (Entry<S, StateHolder<S, E>> holder : holderMap.entrySet()) {
        holder.getValue().setState(stateMap.get(holder.getKey()));
    }

    return delegateAutoStartup(machine);
}

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