WhiteboardFlowController2 (Apache UIMA Base: uimaj-examples: SDK Examples 2.5.0 API)

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java.lang.Object
- org.apache.uima.flow.FlowController_ImplBase
- - org.apache.uima.flow.CasFlowController_ImplBase
  - - org.apache.uima.examples.flow.WhiteboardFlowController2

All Implemented Interfaces:

org.apache.uima.flow.FlowController
```
public class WhiteboardFlowController2
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.
This is an alternative implementation of WhiteboardFlowController. It is slightly more complex but should acheive better performance because CAS Type handles are resolved once, during intitialization, instead of repeatedly resolved at each step of the flow.

Constructor Summary

Constructors
Constructor and Description

WhiteboardFlowController2()

Method Summary

Methods
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)`
`void`	`typeSystemInit(org.apache.uima.cas.TypeSystem aTypeSystem)`

Methods inherited from class org.apache.uima.flow.CasFlowController_ImplBase
computeFlow, getRequiredCasInterface

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
  - WhiteboardFlowController2
```
public WhiteboardFlowController2()
```
- 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
  - typeSystemInit
```
public void typeSystemInit(org.apache.uima.cas.TypeSystem aTypeSystem)
                    throws org.apache.uima.analysis_engine.AnalysisEngineProcessException
```
    Overrides:
    
    typeSystemInit in class org.apache.uima.flow.CasFlowController_ImplBase
    
    Throws:
    
    org.apache.uima.analysis_engine.AnalysisEngineProcessException
  - 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

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