Package io.camunda.zeebe.stream.impl

Class ProcessingStateMachine

java.lang.Object

io.camunda.zeebe.stream.impl.ProcessingStateMachine

public final class ProcessingStateMachine
extends Object

Represents the processing state machine, which is executed on normal processing.

 +------------------+            +--------------------+
 |                  |            |                    |      exception
 | tryToReadNextRecord() |----------->|  processCommand()  |------------------+
 |                  |            |                    |                  v
 +------------------+            +--------------------+            +---------------+
           ^                             |                         |               |------+
           |                             |         +-------------->|   onError()   |      | exception
           |                             |         |  exception    |               |invalid input: '<'-----+
           |                     +-------v-------------+           +---------------+
           |                     |                     |                 |
           |                     |   writeRecords()    |                 |
           |                     |                     |invalid input: '<'----------------+
 +----------------------+        +---------------------+
 |                      |                 |
 | executeSideEffects() |                 v
 |                      |       +----------------------+
 +----------------------+       |                      |
           ^                    |     updateState()    |
           +--------------------|                      |
                                +----------------------+
                                       ^      |
                                       |      | exception
                                       |      |
                                    +---------v----+
                                    |              |
                                    |   onError()  |
                                    |              |
                                    +--------------+
                                       ^     |
                                       |     |  exception
                                       +-----+

 

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	ProcessingStateMachine.ErrorHandlingPhase

Field Summary

Fields

Modifier and Type	Field	Description
static final String	WARN_MESSAGE_BATCH_PROCESSING_RETRY

Constructor Summary

Constructors

Constructor	Description
ProcessingStateMachine(StreamProcessorContext context, BooleanSupplier shouldProcessNext, List<RecordProcessor> recordProcessors, ScheduledCommandCache scheduledCommandCache)

Method Summary

Modifier and Type	Method	Description
long	getLastSuccessfulProcessedRecordPosition()
long	getLastWrittenPosition()
boolean	hasReachedEnd()	Be aware this is a transient property which can change anytime, e.g. if a new command is written to the log.
boolean	isMakingProgress()
void	startProcessing(LastProcessingPositions lastProcessingPositions)

Methods inherited from class java.lang.Object

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

Field Details

WARN_MESSAGE_BATCH_PROCESSING_RETRY

public static final String WARN_MESSAGE_BATCH_PROCESSING_RETRY

See Also:

• Constant Field Values

Constructor Details

ProcessingStateMachine

public ProcessingStateMachine(StreamProcessorContext context,
 BooleanSupplier shouldProcessNext,
 List<RecordProcessor> recordProcessors,
 ScheduledCommandCache scheduledCommandCache)

Method Details

hasReachedEnd

public boolean hasReachedEnd()

Be aware this is a transient property which can change anytime, e.g. if a new command is written to the log.

Returns:

true if the ProcessingStateMachine has reached the end of the log and nothing is left to being processed/applied, false otherwise

getLastSuccessfulProcessedRecordPosition

public long getLastSuccessfulProcessedRecordPosition()

getLastWrittenPosition

public long getLastWrittenPosition()

isMakingProgress

public boolean isMakingProgress()

startProcessing

public void startProcessing(LastProcessingPositions lastProcessingPositions)