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From Benjamin Sznajder <benj...@il.ibm.com>
Subject Cas Multiplier with Flow Controller
Date Tue, 03 Jul 2007 20:24:42 GMT

Hi,

I am trying to run a CAS Multiplier with a Flow Controller.

My CPE is composed of :

 - a Collection reader that reads an image and saves in a CAS a byte array
of its content.
 - a CAS Multiplier that currently, only creates 3 identical CASes with
same content than the initial
 - Some  AEs that extract the MPEG7 features of this images
 - A CAS consumer that creates the XML File representing the MPEG7.

The Flow Controller I used is the WhiteBoardFlowController from the
example.
I added to this class the following:


protected Flow newCasProduced(CAS newCas,
          String producedBy) {
        getContext().getLogger().log(Level.SEVERE, "newCasProduced");
          WhiteboardFlow flow = new WhiteboardFlow();
          flow.setCas(newCas);
          return flow;
  }


but, when I run my CPE, I get the following error. And apparently, the
method has not been reached since the Log message is not printed....


Jul 3, 2007 11:23:07 PM
org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl
processAndOutputNewCASes(267)
SEVERE: Exception occurred
org.apache.uima.analysis_engine.AnalysisEngineProcessException: The Flow
class com.ibm.sapir.flowController.WhiteboardFlowController$WhiteboardFlow
does not support the production of new CASes in the middle of the flow and
so cannot be deployed in an Aggregate AnalysisEngine that includes a CAS
Multiplier component.
      at
org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(
ASB_impl.java:574)
      at
org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.<init>(
ASB_impl.java:393)
      at org.apache.uima.analysis_engine.asb.impl.ASB_impl.process(
ASB_impl.java:326)
      at
org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.processAndOutputNewCASes(
AggregateAnalysisEngine_impl.java:259)
      at
org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(
AnalysisEngineImplBase.java:202)
      at
org.apache.uima.collection.impl.cpm.engine.ProcessingUnit.processNext(
ProcessingUnit.java:1221)
      at org.apache.uima.collection.impl.cpm.engine.ProcessingUnit.run(
ProcessingUnit.java:668)
Caused by: org.apache.uima.UIMA_UnsupportedOperationException: The Flow
class com.ibm.sapir.flowController.WhiteboardFlowController$WhiteboardFlow
does not support the production of new CASes in the middle of the flow and
so cannot be deployed in an Aggregate AnalysisEngine that includes a CAS
Multiplier component.
      at org.apache.uima.flow.CasFlow_ImplBase.newCasProduced(
CasFlow_ImplBase.java:77)
      at org.apache.uima.flow.CasFlow_ImplBase.newCasProduced(
CasFlow_ImplBase.java:54)
      at
org.apache.uima.analysis_engine.asb.impl.FlowContainer.newCasProduced(
FlowContainer.java:70)
      at
org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(
ASB_impl.java:525)
      ... 6 more
org.apache.uima.analysis_engine.AnalysisEngineProcessException: The Flow
class com.ibm.sapir.flowController.WhiteboardFlowController$WhiteboardFlow
does not support the production of new CASes in the middle of the flow and
so cannot be deployed in an Aggregate AnalysisEngine that includes a CAS
Multiplier component.
      at
org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(
ASB_impl.java:574)
      at
org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.<init>(
ASB_impl.java:393)
      at org.apache.uima.analysis_engine.asb.impl.ASB_impl.process(
ASB_impl.java:326)
      at
org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.processAndOutputNewCASes(
AggregateAnalysisEngine_impl.java:259)
      at
org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(
AnalysisEngineImplBase.java:202)
      at
org.apache.uima.collection.impl.cpm.engine.ProcessingUnit.processNext(
ProcessingUnit.java:1221)
      at org.apache.uima.collection.impl.cpm.engine.ProcessingUnit.run(
ProcessingUnit.java:668)
Caused by: org.apache.uima.UIMA_UnsupportedOperationException: The Flow
class com.ibm.sapir.flowController.WhiteboardFlowController$WhiteboardFlow
does not support the production of new CASes in the middle of the flow and
so cannot be deployed in an Aggregate AnalysisEngine that includes a CAS
Multiplier component.
      at org.apache.uima.flow.CasFlow_ImplBase.newCasProduced(
CasFlow_ImplBase.java:77)
      at org.apache.uima.flow.CasFlow_ImplBase.newCasProduced(
CasFlow_ImplBase.java:54)
      at
org.apache.uima.analysis_engine.asb.impl.FlowContainer.newCasProduced(
FlowContainer.java:70)
      at
org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(
ASB_impl.java:525)
      ... 6 more
Jul 3, 2007 11:23:07 PM
org.apache.uima.collection.impl.cpm.engine.ProcessingUnit process
SEVERE: The container AggregateMPEG7Descriptor returned the following error
message: The Flow class
com.ibm.sapir.flowController.WhiteboardFlowController$WhiteboardFlow does
not support the production of new CASes in the middle of the flow and so
cannot be deployed in an Aggregate AnalysisEngine that includes a CAS
Multiplier component. (Thread Name: [Procesing Pipeline#1 Thread]::)
Jul 3, 2007 11:23:07 PM
org.apache.uima.collection.impl.cpm.engine.ProcessingUnit processNext(1338)
SEVERE: [Procesing Pipeline#1 Thread]::
org.apache.uima.analysis_engine.AnalysisEngineProcessException: The Flow
class com.ibm.sapir.flowController.WhiteboardFlowController$WhiteboardFlow
does not support the production of new CASes in the middle of the flow and
so cannot be deployed in an Aggregate AnalysisEngine that includes a CAS
Multiplier component.
      at
org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(
ASB_impl.java:574)
      at
org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.<init>(
ASB_impl.java:393)
      at org.apache.uima.analysis_engine.asb.impl.ASB_impl.process(
ASB_impl.java:326)
      at
org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.processAndOutputNewCASes(
AggregateAnalysisEngine_impl.java:259)
      at
org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(
AnalysisEngineImplBase.java:202)
      at
org.apache.uima.collection.impl.cpm.engine.ProcessingUnit.processNext(
ProcessingUnit.java:1221)
      at org.apache.uima.collection.impl.cpm.engine.ProcessingUnit.run(
ProcessingUnit.java:668)
Caused by: org.apache.uima.UIMA_UnsupportedOperationException: The Flow
class com.ibm.sapir.flowController.WhiteboardFlowController$WhiteboardFlow
does not support the production of new CASes in the middle of the flow and
so cannot be deployed in an Aggregate AnalysisEngine that includes a CAS
Multiplier component.
      at org.apache.uima.flow.CasFlow_ImplBase.newCasProduced(
CasFlow_ImplBase.java:77)
      at org.apache.uima.flow.CasFlow_ImplBase.newCasProduced(
CasFlow_ImplBase.java:54)
      at
org.apache.uima.analysis_engine.asb.impl.FlowContainer.newCasProduced(
FlowContainer.java:70)
      at
org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(
ASB_impl.java:525)
      ... 6 more
org.apache.uima.analysis_engine.AnalysisEngineProcessException: The Flow
class com.ibm.sapir.flowController.WhiteboardFlowController$WhiteboardFlow
does not support the production of new CASes in the middle of the flow and
so cannot be deployed in an Aggregate AnalysisEngine that includes a CAS
Multiplier component.
      at
org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(
ASB_impl.java:574)
      at
org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.<init>(
ASB_impl.java:393)
      at org.apache.uima.analysis_engine.asb.impl.ASB_impl.process(
ASB_impl.java:326)
      at
org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.processAndOutputNewCASes(
AggregateAnalysisEngine_impl.java:259)
      at
org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(
AnalysisEngineImplBase.java:202)
      at
org.apache.uima.collection.impl.cpm.engine.ProcessingUnit.processNext(
ProcessingUnit.java:1221)
      at org.apache.uima.collection.impl.cpm.engine.ProcessingUnit.run(
ProcessingUnit.java:668)
Caused by: org.apache.uima.UIMA_UnsupportedOperationException: The Flow
class com.ibm.sapir.flowController.WhiteboardFlowController$WhiteboardFlow
does not support the production of new CASes in the middle of the flow and
so cannot be deployed in an Aggregate AnalysisEngine that includes a CAS
Multiplier component.
      at org.apache.uima.flow.CasFlow_ImplBase.newCasProduced(
CasFlow_ImplBase.java:77)
      at org.apache.uima.flow.CasFlow_ImplBase.newCasProduced(
CasFlow_ImplBase.java:54)
      at
org.apache.uima.analysis_engine.asb.impl.FlowContainer.newCasProduced(
FlowContainer.java:70)
      at
org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(
ASB_impl.java:525)
      ... 6 more
Jul 3, 2007 11:23:07 PM
org.apache.uima.collection.impl.cpm.container.ProcessingContainer_Impl
process
SEVERE: The CPM stopped because the configured error threshold 0 was
exceeded. (Thread Name: [Procesing Pipeline#1 Thread]::) Component Name:
AggregateMPEG7Descriptor
Jul 3, 2007 11:23:07 PM
org.apache.uima.collection.impl.cpm.engine.ProcessingUnit process


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