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

Class CommandProcessorImpl<T extends UnifiedRecordValue>

java.lang.Object

io.camunda.zeebe.engine.processing.streamprocessor.CommandProcessorImpl<T>

Type Parameters:

T - the record value type

All Implemented Interfaces:

CommandProcessor.CommandControl<T>, StreamProcessorLifecycleAware, TypedRecordProcessor<T>

public final class CommandProcessorImpl<T extends UnifiedRecordValue>
extends Object
implements TypedRecordProcessor<T>, CommandProcessor.CommandControl<T>

Decorates a command processor with simple accept and reject logic.

On accept it writes the state corresponding to successfully processing the command (e.g. process instance creation: CREATE => CREATED); and responds if it was a client command that should be responded to.

On reject it writes a command rejection

Constructor Summary

Constructors

Constructor	Description
CommandProcessorImpl(CommandProcessor<T> commandProcessor, KeyGenerator keyGenerator, Writers writers)

Method Summary

Modifier and Type	Method	Description
long	accept(Intent newState, T updatedValue)
void	processRecord(TypedRecord<T> command, TypedResponseWriter responseWriter, TypedStreamWriter streamWriter, Consumer<SideEffectProducer> sideEffect)
void	reject(RejectionType type, String reason)

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.camunda.zeebe.engine.processing.streamprocessor.StreamProcessorLifecycleAware

onClose, onFailed, onPaused, onRecovered, onResumed

Methods inherited from interface io.camunda.zeebe.engine.processing.streamprocessor.TypedRecordProcessor

processRecord, processRecord

Constructor Details

CommandProcessorImpl

public CommandProcessorImpl(CommandProcessor<T> commandProcessor,
 KeyGenerator keyGenerator,
 Writers writers)

Method Details

processRecord

public void processRecord(TypedRecord<T> command,
 TypedResponseWriter responseWriter,
 TypedStreamWriter streamWriter,
 Consumer<SideEffectProducer> sideEffect)

Specified by:

processRecord in interface TypedRecordProcessor<T extends UnifiedRecordValue>

See Also:

• TypedRecordProcessor.processRecord(TypedRecord, TypedResponseWriter, TypedStreamWriter, Consumer)

accept

public long accept(Intent newState,
 T updatedValue)

Specified by:

accept in interface CommandProcessor.CommandControl<T extends UnifiedRecordValue>

Returns:

the key of the entity

reject

public void reject(RejectionType type,
 String reason)

Specified by:

reject in interface CommandProcessor.CommandControl<T extends UnifiedRecordValue>