Interface Step

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static java.util.Date TIME_NOT_SET
      Time value: the start or end time has not been set.
    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      void addSuccessor​(Outcome outcome, Step step)
      Adds a successor Step to this one, which will be triggered by a supplied Outcome.
      Outcome execute​(Context ctx)
      Executes the processing for this Step and returns an Outcome indicating if it succeeded (Outcome.STEP_COMPLETE or Outcome.STEP_ABORT).
      java.security.Principal getActor()
      The Principal responsible for completing this Step, such as a system user or actor assigned to a Decision.
      java.util.Collection<Outcome> getAvailableOutcomes()
      Returns a Collection of available outcomes, such as "approve", "deny" or "reassign", in the order in which they were added via addSuccessor(Outcome, Step).
      java.util.Date getEndTime()
      The end time for this Step.
      java.util.List<java.lang.String> getErrors()
      Returns a List of error strings generated by this Step.
      java.lang.String getMessageKey()
      Message key for human-friendly name of this Step, including any parameter substitutions.
      Outcome getOutcome()
      Returns the Outcome of this Step's processing; by default, Outcome.STEP_CONTINUE.
      java.util.Date getStartTime()
      The start time for this Step.
      Step getSuccessor​(Outcome outcome)
      Identifies the next Step for a particular Outcome; if there is no next Step for this Outcome, this method returns null.
      boolean isCompleted()
      Determines whether the Step is completed; if not, it is by definition awaiting action by the owner or in process.
      boolean isStarted()
      Determines whether the Step has started.
      void setOutcome​(Outcome outcome)
      Sets the current Outcome for the step.
      void setWorkflow​(int workflowId, java.util.Map<java.lang.String,​java.io.Serializable> workflowContext)
      Sets the parent Workflow post-construction.
      void start()
      Starts the Step, and sets the start time to the moment when this method is first invoked.
    • Field Detail

      • TIME_NOT_SET

        static final java.util.Date TIME_NOT_SET
        Time value: the start or end time has not been set.
    • Method Detail

      • addSuccessor

        void addSuccessor​(Outcome outcome,
                          Step step)
        Adds a successor Step to this one, which will be triggered by a supplied Outcome. Implementations should respect the order in which Outcomes are added; getAvailableOutcomes() should return them in the same order they were added.
        Parameters:
        outcome - the Outcome triggering a particular successor Step
        step - the Step to associated with this Outcomes (null denotes no Steps)
      • getAvailableOutcomes

        java.util.Collection<OutcomegetAvailableOutcomes()
        Returns a Collection of available outcomes, such as "approve", "deny" or "reassign", in the order in which they were added via addSuccessor(Outcome, Step). Concrete implementations should always return a defensive copy of the outcomes, not the original backing collection.
        Returns:
        the set of outcomes
      • getErrors

        java.util.List<java.lang.String> getErrors()
        Returns a List of error strings generated by this Step. If this Step generated no errors, this method returns a zero-length array.
        Returns:
        the errors
      • execute

        Outcome execute​(Context ctx)
                 throws WikiException

        Executes the processing for this Step and returns an Outcome indicating if it succeeded (Outcome.STEP_COMPLETE or Outcome.STEP_ABORT). Processing instructions can do just about anything, such as executing custom business logic or changing the Step's final outcome via setOutcome(Outcome). A return value of STEP_COMPLETE indicates that the instructions executed completely, without errors; STEP_ABORT indicates that the Step and its parent Workflow should be aborted (that is, fail silently without error). If the execution step encounters any errors, it should throw a WikiException or a subclass.

        Note that successful execution of this methods does not necessarily mean that the Step is considered "complete"; rather, it just means that it has executed. Therefore, it is possible that execute could run multiple times.

        Parameters:
        ctx - executing wiki context.
        Returns:
        the result of the Step, expressed as an Outcome
        Throws:
        WikiException - if the step encounters errors while executing
      • getActor

        java.security.Principal getActor()
        The Principal responsible for completing this Step, such as a system user or actor assigned to a Decision.
        Returns:
        the responsible Principal
      • getEndTime

        java.util.Date getEndTime()
        The end time for this Step. This value should be set when the step completes. Returns TIME_NOT_SET if not completed yet.
        Returns:
        the end time
      • getMessageKey

        java.lang.String getMessageKey()
        Message key for human-friendly name of this Step, including any parameter substitutions. By convention, the message prefix should be a lower-case version of the Step's type, plus a period (e.g., task. and decision.).
        Returns:
        the message key for this Step.
      • getStartTime

        java.util.Date getStartTime()
        The start time for this Step. Returns TIME_NOT_SET if not started yet.
        Returns:
        the start time
      • isCompleted

        boolean isCompleted()
        Determines whether the Step is completed; if not, it is by definition awaiting action by the owner or in process. If a Step has completed, it must also return a non-null result for getOutcome().
        Returns:
        true if the Step has completed; false if not.
      • isStarted

        boolean isStarted()
        Determines whether the Step has started.
        Returns:
        true if the Step has started; false if not.
      • start

        void start()
            throws WikiException
        Starts the Step, and sets the start time to the moment when this method is first invoked. If this Step has already been started, this method throws an IllegalStateException. If the Step cannot be started because the underlying implementation encounters an error, it the implementation should throw a WikiException.
        Throws:
        WikiException - if the step encounters errors while starting
      • setOutcome

        void setOutcome​(Outcome outcome)
        Sets the current Outcome for the step. If the Outcome is a "completion" Outcome, it should also sets the completon time and mark the Step as complete. Once a Step has been marked complete, this method cannot be called again. If the supplied Outcome is not in the set returned by getAvailableOutcomes(), or is not Outcome.STEP_CONTINUE or Outcome.STEP_ABORT, this method returns an IllegalArgumentException. If the caller attempts to set an Outcome and the Step has already completed, this method throws an IllegalStateException.
        Parameters:
        outcome - whether the step should be considered completed
      • getSuccessor

        Step getSuccessor​(Outcome outcome)
        Identifies the next Step for a particular Outcome; if there is no next Step for this Outcome, this method returns null.
        Parameters:
        outcome - the outcome
        Returns:
        the next step
      • setWorkflow

        void setWorkflow​(int workflowId,
                         java.util.Map<java.lang.String,​java.io.Serializable> workflowContext)
        Sets the parent Workflow post-construction. Should be called after building a Step.
        Parameters:
        workflowId - the parent workflow id to set
        workflowContext - the parent workflow context to set