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>, 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

Nested Class Summary

Nested classes/interfaces inherited from interface io.camunda.zeebe.engine.processing.streamprocessor.TypedRecordProcessor

TypedRecordProcessor.ProcessingError

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)
void	reject(RejectionType type, String reason)
TypedRecordProcessor.ProcessingError	tryHandleError(TypedRecord<T> command, Throwable error)	Try to handle an error that occurred during processing.

Methods inherited from class java.lang.Object

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

Constructor Details

CommandProcessorImpl

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

Method Details

processRecord

public void processRecord(TypedRecord<T> command)

Specified by:

processRecord in interface TypedRecordProcessor<T extends UnifiedRecordValue>

tryHandleError

public TypedRecordProcessor.ProcessingError tryHandleError(TypedRecord<T> command,
 Throwable error)

Description copied from interface: TypedRecordProcessor

Try to handle an error that occurred during processing.

Specified by:

tryHandleError in interface TypedRecordProcessor<T extends UnifiedRecordValue>

Parameters:

command - The command that was being processed when the error occurred

error - The error that occurred, and the processor should attempt to handle

Returns:

The type of the processing error. Default: TypedRecordProcessor.ProcessingError.UNEXPECTED_ERROR.

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>