Package io.zeebe.engine.processing.streamprocessor

Class ProcessingStateMachine

java.lang.Object

io.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
                                       +-----+

 

Field Summary

Fields

Modifier and Type	Field	Description
protected RecordMetadata	metadata
protected TypedResponseWriterImpl	responseWriter
protected ZeebeState	zeebeState

Constructor Summary

Constructors

Constructor	Description
ProcessingStateMachine(ProcessingContext context, BooleanSupplier shouldProcessNext)

Method Summary

Modifier and Type	Method	Description
long	getLastSuccessfulProcessedEventPosition()
long	getLastWrittenEventPosition()
boolean	isMakingProgress()
void	setSideEffectProducer(SideEffectProducer sideEffectProducer)
void	startProcessing(long lastReprocessedPosition)

Methods inherited from class java.lang.Object

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

Field Detail

zeebeState

protected final ZeebeState zeebeState

metadata

protected final RecordMetadata metadata

responseWriter

protected final TypedResponseWriterImpl responseWriter

Constructor Detail

ProcessingStateMachine

public ProcessingStateMachine(ProcessingContext context,
                              BooleanSupplier shouldProcessNext)

Method Detail

setSideEffectProducer

public void setSideEffectProducer(SideEffectProducer sideEffectProducer)

getLastSuccessfulProcessedEventPosition

public long getLastSuccessfulProcessedEventPosition()

getLastWrittenEventPosition

public long getLastWrittenEventPosition()

isMakingProgress

public boolean isMakingProgress()

startProcessing

public void startProcessing(long lastReprocessedPosition)