Package io.camunda.zeebe.engine.processing.streamprocessor

Class ProcessingStateMachine

java.lang.Object

io.camunda.zeebe.engine.processing.streamprocessor.ProcessingStateMachine

public final class ProcessingStateMachine
extends Object

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

 +-----------------+             +--------------------+
 |                 |             |                    |      exception
 | readNextEvent() |------------>|   processEvent()   |------------------+
 |                 |             |                    |                  v
 +-----------------+             +--------------------+            +---------------+
           ^                             |                         |               |------+
           |                             |         +-------------->|   onError()   |      | exception
           |                             |         |  exception    |               |<-----+
           |                     +-------v-------------+           +---------------+
           |                     |                     |                 |
           |                     |    writeEvent()     |                 |
           |                     |                     |<----------------+
 +----------------------+        +---------------------+
 |                      |                 |
 | executeSideEffects() |                 v
 |                      |       +----------------------+
 +----------------------+       |                      |
           ^                    |     updateState()    |
           +--------------------|                      |
                                +----------------------+
                                       ^      |
                                       |      | exception
                                       |      |
                                    +---------v----+
                                    |              |
                                    |   onError()  |
                                    |              |
                                    +--------------+
                                       ^     |
                                       |     |  exception
                                       +-----+

 

Constructor Summary

Constructors

Constructor	Description
ProcessingStateMachine(ProcessingContext context, BooleanSupplier shouldProcessNext)

Method Summary

Modifier and Type	Method	Description
long	getLastSuccessfulProcessedEventPosition()
long	getLastWrittenPosition()
boolean	hasReachedEnd()	Be aware this is a transient property which can change anytime, e.g.
boolean	isMakingProgress()
void	setSideEffectProducer(SideEffectProducer sideEffectProducer)
void	startProcessing(LastProcessingPositions lastProcessingPositions)

Methods inherited from class java.lang.Object

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

Constructor Details

ProcessingStateMachine

public ProcessingStateMachine(ProcessingContext context,
 BooleanSupplier shouldProcessNext)

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

setSideEffectProducer

public void setSideEffectProducer(SideEffectProducer sideEffectProducer)

getLastSuccessfulProcessedEventPosition

public long getLastSuccessfulProcessedEventPosition()

getLastWrittenPosition

public long getLastWrittenPosition()

isMakingProgress

public boolean isMakingProgress()

startProcessing

public void startProcessing(LastProcessingPositions lastProcessingPositions)