org.apache.uima.examples.flow

Class WhiteboardFlowController

java.lang.Object

org.apache.uima.flow.FlowController_ImplBase

org.apache.uima.flow.CasFlowController_ImplBase

org.apache.uima.examples.flow.WhiteboardFlowController

All Implemented Interfaces:

org.apache.uima.flow.FlowController

public class WhiteboardFlowController
extends org.apache.uima.flow.CasFlowController_ImplBase

FlowController implementing a simple version of the "whiteboard" flow model. Each time a CAS is received, it looks at the pool of available AEs that have not yet run on that CAS, and picks one whose input requirements are satisfied.

Limitations: only looks at types, not features. Ignores languagesSupported. Does not handle multiple Sofas or CasMultipliers.

Constructor Summary

Constructors

Constructor and Description
WhiteboardFlowController()

Method Summary

Modifier and Type	Method and Description
org.apache.uima.flow.Flow	computeFlow(org.apache.uima.cas.CAS aCAS)
void	initialize(org.apache.uima.flow.FlowControllerContext aContext)

Methods inherited from class org.apache.uima.flow.CasFlowController_ImplBase

computeFlow, getRequiredCasInterface, typeSystemInit

Methods inherited from class org.apache.uima.flow.FlowController_ImplBase

addAnalysisEngines, batchProcessComplete, collectionProcessComplete, destroy, getContext, reconfigure, removeAnalysisEngines

Methods inherited from class java.lang.Object

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

Constructor Detail

WhiteboardFlowController

public WhiteboardFlowController()

Method Detail

initialize

public void initialize(org.apache.uima.flow.FlowControllerContext aContext)
                throws org.apache.uima.resource.ResourceInitializationException

Specified by:

initialize in interface org.apache.uima.flow.FlowController

Overrides:

initialize in class org.apache.uima.flow.FlowController_ImplBase

Throws:

org.apache.uima.resource.ResourceInitializationException

computeFlow

public org.apache.uima.flow.Flow computeFlow(org.apache.uima.cas.CAS aCAS)
                                      throws org.apache.uima.analysis_engine.AnalysisEngineProcessException

Specified by:

computeFlow in class org.apache.uima.flow.CasFlowController_ImplBase

Throws:

org.apache.uima.analysis_engine.AnalysisEngineProcessException