Class Checkpoint
java.lang.Object
org.apache.uima.collection.impl.cpm.Checkpoint
- All Implemented Interfaces:
Runnable
Runing in a seperate thread creates a checkpoint file at predefined intervals.
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate long
private BaseCPMImpl
private String
private final Object
private boolean
private boolean
private String
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Constructor Summary
ConstructorsConstructorDescriptionCheckpoint
(BaseCPMImpl aCpm, String aFilename, long aCheckpointFrequency) Initialize the checkpoint with a reference to controlling cpe, the file where the checkpoint is to be stored, and the frequency of checkpoints. -
Method Summary
Modifier and TypeMethodDescriptionvoid
delete()
Deletes checkpoint file from the filesystemvoid
Serializes checkpoint information to disk.boolean
exists()
Returns true if configured checkpoinjt file exists on diskvoid
pause()
Pauses checkpoint threadstatic void
printEveList
(List lst, int tCnt) Prints the list of Process Events in the order that they were produced.static void
printStats
(ProcessTrace prT) void
Renames previous checkpoint file.Retrieves the checkpoint from the filesystem.void
resume()
Resumes checkpoint threadvoid
run()
Starts the checkpoint thread and runs until the cpe tells it to stopvoid
start()
Start the threadvoid
stop()
Stops the checkpoint thread
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Field Details
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fileName
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stop
private volatile boolean stop -
checkpointFrequency
private long checkpointFrequency -
pause
private boolean pause -
lockForPause
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cpm
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synchPointFileName
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Constructor Details
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Checkpoint
Initialize the checkpoint with a reference to controlling cpe, the file where the checkpoint is to be stored, and the frequency of checkpoints.- Parameters:
aCpm
-aFilename
-aCheckpointFrequency
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Method Details
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start
public void start()Start the thread -
stop
public void stop()Stops the checkpoint thread -
run
public void run()Starts the checkpoint thread and runs until the cpe tells it to stop -
delete
public void delete()Deletes checkpoint file from the filesystem -
pause
public void pause()Pauses checkpoint thread -
resume
public void resume()Resumes checkpoint thread -
doCheckpoint
public void doCheckpoint()Serializes checkpoint information to disk. It retrieves data to checkpoint from the CPEEngine. -
rename
Renames previous checkpoint file.- Parameters:
aFilename
- - checkpoint file to rename
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printStats
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printEveList
Prints the list of Process Events in the order that they were produced.- Parameters:
lst
- List of ProcessEventtCnt
- depth of this List in the Process Trace hierarchy
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exists
public boolean exists()Returns true if configured checkpoinjt file exists on disk- Returns:
- - true if file exists, false otherwise
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restoreFromCheckpoint
Retrieves the checkpoint from the filesystem.- Returns:
- - desirialized object containing recovery information.
- Throws:
IOException
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