org.apache.wiki.workflow

Class DecisionQueue

java.lang.Object

org.apache.wiki.workflow.DecisionQueue

All Implemented Interfaces:

java.io.Serializable

public class DecisionQueue
extends java.lang.Object
implements java.io.Serializable

Keeps a queue of pending Decisions that need to be acted on by named Principals.

Since:

2.5

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DecisionQueue() Constructs a new DecisionQueue.

Method Summary

Modifier and Type	Method and Description
protected void	add(Decision decision) Adds a Decision to the DecisionQueue; also sets the Decision's unique identifier.
void	decide(Decision decision, Outcome outcome, Context context) Attempts to complete a Decision by calling Decision.decide(Outcome, Context).
protected Decision[]	decisions() Protected method that returns all pending Decisions in the queue, in order of submission.
java.util.Collection<Decision>	getActorDecisions(Session session) Returns a Collection representing the current Decisions that pertain to a users's Session.
void	reassign(Decision decision, java.security.Principal owner) Reassigns the owner of the Decision to a new owner.
protected void	remove(Decision decision) Protected method that removes a Decision from the queue.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DecisionQueue

public DecisionQueue()

Constructs a new DecisionQueue.

Method Detail

add

protected void add(Decision decision)

Adds a Decision to the DecisionQueue; also sets the Decision's unique identifier.

Parameters:

decision - the Decision to add

decisions

protected Decision[] decisions()

Protected method that returns all pending Decisions in the queue, in order of submission. If no Decisions are pending, this method returns a zero-length array.

Returns:

the pending decisions

remove

protected void remove(Decision decision)

Protected method that removes a Decision from the queue.

Parameters:

decision - the decision to remove

getActorDecisions

public java.util.Collection<Decision> getActorDecisions(Session session)

Returns a Collection representing the current Decisions that pertain to a users's Session. The Decisions are obtained by iterating through the Session's Principals and selecting those Decisions whose Decision.getActor() value match. If the session is not authenticated, this method returns an empty Collection.

Parameters:

session - the wiki session

Returns:

the collection of Decisions, which may be empty

decide

public void decide(Decision decision,
                   Outcome outcome,
                   Context context)
            throws WikiException

Attempts to complete a Decision by calling Decision.decide(Outcome, Context). This will cause the Step immediately following the Decision (if any) to start. If the decision completes successfully, this method also removes the completed decision from the queue.

Parameters:

decision - the Decision for which the Outcome will be supplied

outcome - the Outcome of the Decision

Throws:

WikiException - if the succeeding Step cannot start for any reason

reassign

public void reassign(Decision decision,
                     java.security.Principal owner)
              throws WikiException

Reassigns the owner of the Decision to a new owner. Under the covers, this method calls Decision.reassign(Principal).

Parameters:

decision - the Decision to reassign

owner - the new owner

Throws:

WikiException - never