ee.telekom.workflow.graph.node.gateway

Class AndFork

java.lang.Object

ee.telekom.workflow.graph.node.AbstractNode

ee.telekom.workflow.graph.node.gateway.AbstractGateway

ee.telekom.workflow.graph.node.gateway.AndFork

All Implemented Interfaces:

Node

public class AndFork
extends AbstractGateway

Gateway, that implements the "parallel split" workflow pattern. That means, based on the incoming token, it generates a new child token per subsequent branch and initiates the execution of the child tokens. At the same time, the incoming token remains at this gateway.

The underlying token model implies restraints on the subsequent branches. The following figure illustrates the two types of valid usages.
One valid pattern is a balanced fork-join block which is built of a fork and a join. It synchronises (re-joins) all branches leaving the fork in the paired join. As a join, either an AndJoin or a CancellingDiscriminator may be used but not an XorJoin.
The other valid pattern leaves all subsequent branches independently and never synchronises (re-joins) those back. In that case, every subsequent branch is ended implicitly by a node without outgoing transitions.

          +--[3]--+
 [1]--[AND]       [AND/CD]--[6]
          +--[4]--+
          
          +--[3]
 [1]--[AND]
          +--[4]
 

Note that an AndFork behaves identical to an OrFork with a null condition for every subsequent branch.

Constructor Summary

Constructors

Constructor and Description
AndFork(int id)
AndFork(int id, String name)

Method Summary

Modifier and Type	Method and Description
void	cancel(GraphEngine engine, Token token) Called when the GraphEngine cancels the execution of a Token, that is currently pointing to this node and is in a wait state.
void	execute(GraphEngine engine, Token token) Performs node specific logic.

Methods inherited from class ee.telekom.workflow.graph.node.gateway.AbstractGateway

store

Methods inherited from class ee.telekom.workflow.graph.node.AbstractNode

getId, getName, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

AndFork

public AndFork(int id)

AndFork

public AndFork(int id,
               String name)

Method Detail

execute

public void execute(GraphEngine engine,
                    Token token)

Description copied from interface: Node

Performs node specific logic. Either from the execute method, or later from the outside, the GraphEngineFacade#complete(WorkItem) method must be called to continue executing the GraphInstance.

Parameters:

engine - the GraphEngine which is performing the execution

token - the Token which is currently executing in this node

cancel

public void cancel(GraphEngine engine,
                   Token token)

Description copied from interface: Node

Called when the GraphEngine cancels the execution of a Token, that is currently pointing to this node and is in a wait state.

Parameters:

engine - the GraphEngine which is performing the execution

token - the Token pointing to this node