Examples of org.springframework.webflow.execution.FlowSession

Package org.springframework.webflow.execution

Examples of org.springframework.webflow.execution.FlowSession

org.springframework.webflow.execution.FlowSession
A single, local instantiation of a {@link FlowDefinition flow definition} launched within an overall flow execution.
This object maintains all instance state including session status within exactly one governing FlowExecution, as well as the current flow state. This object also acts as the local "flow scope" data model. Data in {@link #getScope() flow scope} lives for the life of this object and is cleaned up automatically when this object isdestroyed. Destruction happens when this session enters an end state.
Note that a flow session is in no way linked to an HTTP session. It just uses the familiar "session" naming convention to denote a stateful object. @see FlowDefinition @see FlowExecution @author Keith Donald @author Erwin Vervaet

    @SuppressWarnings("unchecked")
    public Object getReferenceInFlowScope(String flowExecutionKey, String referenceName, HttpServletRequest request) {
        ExternalContextHolder.setExternalContext(new ServletExternalContext(servletContext, request, null));
        FlowExecutionRepository executionRepository =  ((FlowExecutorImpl) flowExecutor).getExecutionRepository();
        FlowExecution flowExecution = executionRepository.getFlowExecution(executionRepository.parseFlowExecutionKey(flowExecutionKey));
        FlowSession flowSession = flowExecution.getActiveSession();
        return flowSession.getScope().get(referenceName);
    }

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   * @param context the control context for the currently executing flow, used by this state to manipulate the flow
   * execution
   * @throws FlowExecutionException if an exception occurs in this state
   */
  protected void doEnter(final RequestControlContext context) throws FlowExecutionException {
    FlowSession activeSession = context.getFlowExecutionContext().getActiveSession();
    if (activeSession.isRoot()) {
      // entire flow execution is ending; issue the final response
      if (finalResponseAction != null && context.getExternalContext().isResponseAllowed()) {
        ActionExecutor.execute(finalResponseAction, context);
        context.getExternalContext().recordResponseComplete();
      }

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  // package private request control context callbacks


  void start(Flow flow, MutableAttributeMap input, RequestControlContext context) {
    listeners.fireSessionCreating(context, flow);
    FlowSession session = activateSession(flow);
    if (input == null) {
      input = new LocalAttributeMap();
    }
    StateManageableMessageContext messageContext = (StateManageableMessageContext) context.getMessageContext();
    messageContext.setMessageSource(flow.getApplicationContext());

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    return (FlowSessionImpl) flowSessions.getLast();
  }


  private FlowExecutionException wrap(Exception e) {
    if (isActive()) {
      FlowSession session = getActiveSession();
      String flowId = session.getDefinition().getId();
      String stateId = session.getState() != null ? session.getState().getId() : null;
      return new FlowExecutionException(flowId, stateId, "Exception thrown in state '" + stateId + "' of flow '"
          + flowId + "'", e);
    } else {
      return new FlowExecutionException(flow.getId(), null, "Exception thrown within inactive flow '"
          + flow.getId() + "'", e);

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    this.transactionTemplate = new TransactionTemplate(transactionManager);
  }


  public void sessionStarting(RequestContext context, FlowSession session, MutableAttributeMap input) {
    if (!session.isRoot()) {
      FlowSession parent = session.getParent();
      if (isPersistenceContext(parent.getDefinition())) {
        unbind(getEntityManager(parent));
      }
    }
    if (isPersistenceContext(session.getDefinition())) {
      EntityManager em = entityManagerFactory.createEntityManager();

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      }
      unbind(em);
      em.close();
    }
    if (!session.isRoot()) {
      FlowSession parent = session.getParent();
      if (isPersistenceContext(parent.getDefinition())) {
        bind(getEntityManager(parent));
      }
    }
  }

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    this.entityInterceptor = entityInterceptor;
  }


  public void sessionStarting(RequestContext context, FlowSession session, MutableAttributeMap input) {
    if (!session.isRoot()) {
      FlowSession parent = session.getParent();
      if (isPersistenceContext(parent.getDefinition())) {
        unbind(getHibernateSession(parent));
      }
    }
    if (isPersistenceContext(session.getDefinition())) {
      Session hibernateSession = createSession(context);

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      }
      unbind(hibernateSession);
      hibernateSession.close();
    }
    if (!session.isRoot()) {
      FlowSession parent = session.getParent();
      if (isPersistenceContext(parent.getDefinition())) {
        bind(getHibernateSession(parent));
      }
    }
  }

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   * @param context the control context for the currently executing flow, used by this state to manipulate the flow
   * execution
   * @throws FlowExecutionException if an exception occurs in this state
   */
  protected void doEnter(final RequestControlContext context) throws FlowExecutionException {
    FlowSession activeSession = context.getFlowExecutionContext().getActiveSession();
    if (activeSession.isRoot()) {
      // entire flow execution is ending; issue the final response
      if (finalResponseAction != null && !context.getExternalContext().isResponseComplete()) {
        ActionExecutor.execute(finalResponseAction, context);
        context.getExternalContext().recordResponseComplete();
      }

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    getFlashScope().put("messagesMemento", messagesMemento);
  }


  private FlowExecutionException wrap(Exception e) {
    if (isActive()) {
      FlowSession session = getActiveSession();
      String flowId = session.getDefinition().getId();
      String stateId = session.getState() != null ? session.getState().getId() : null;
      return new FlowExecutionException(flowId, stateId, "Exception thrown in state '" + stateId + "' of flow '"
          + flowId + "'", e);
    } else {
      return new FlowExecutionException(flow.getId(), null, "Exception thrown within inactive flow '"
          + flow.getId() + "'", e);

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