Package software.amazon.lambda.durable.operation

Class StepOperation<T>

java.lang.Object

software.amazon.lambda.durable.operation.BaseDurableOperation

software.amazon.lambda.durable.operation.SerializableDurableOperation<T>

software.amazon.lambda.durable.operation.StepOperation<T>

Type Parameters:

T - the result type of the step function

All Implemented Interfaces:

DurableFuture<T>

public class StepOperation<T>
extends SerializableDurableOperation<T>

Durable operation that executes a user-provided function with retry support.

Steps are the primary unit of work in a durable execution. Each step is checkpointed before and after execution, enabling automatic retry on failure and replay on re-invocation.

Nested Class Summary

Nested classes/interfaces inherited from class software.amazon.lambda.durable.operation.SerializableDurableOperation

SerializableDurableOperation.SerializedResult<T>

Field Summary

Fields inherited from class software.amazon.lambda.durable.operation.BaseDurableOperation

completionFuture, executionManager, isVirtual, parentOperation, replayCompletedOperation

Constructor Summary

Constructors

Constructor	Description
StepOperation(OperationIdentifier operationIdentifier, Function<StepContext,T> function, TypeToken<T> resultTypeToken, StepConfig config, DurableContextImpl durableContext)

Method Summary

Modifier and Type	Method	Description
T	get()	Blocks until the operation completes and returns the result.
protected void	replay(software.amazon.awssdk.services.lambda.model.Operation existing)	Replays the operation.
protected void	start()	Starts the operation.

Methods inherited from class software.amazon.lambda.durable.operation.SerializableDurableOperation

deserializeException, deserializeResult, serDesContext, serializeAndDeserializeResult, serializeException

Methods inherited from class software.amazon.lambda.durable.operation.BaseDurableOperation

deregisterActiveThread, execute, extractErrorFromOperation, fireOnOperationEnd, getChildOperations, getCompletionFuture, getContext, getCurrentThreadContext, getErrorObject, getName, getOperation, getOperationId, getRunningUserHandler, getSubType, getType, interruptRunningUserHandler, isOperationCompleted, isRunningUserHandlerOwner, markAlreadyCompleted, onCheckpointComplete, pollForOperationUpdates, pollForOperationUpdates, processCheckpointUpdate, registerActiveThread, runUserFunction, runUserHandler, sendOperationUpdate, sendOperationUpdateAsync, terminateExecution, terminateExecutionWithIllegalDurableOperationException, validateReplay, waitForFirstOperationCompletion, waitForOperationCompletion

Methods inherited from class java.lang.Object

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

Constructor Details

StepOperation

public StepOperation(OperationIdentifier operationIdentifier,
 Function<StepContext,T> function,
 TypeToken<T> resultTypeToken,
 StepConfig config,
 DurableContextImpl durableContext)

Method Details

start

protected void start()

Starts the operation.

Specified by:

start in class BaseDurableOperation

replay

protected void replay(software.amazon.awssdk.services.lambda.model.Operation existing)

Replays the operation.

Specified by:

replay in class BaseDurableOperation

Parameters:

existing - the checkpointed operation state

get

public T get()

Description copied from interface: DurableFuture

Blocks until the operation completes and returns the result.

This delegates to operation.get() which handles: - Thread deregistration (allows suspension) - Thread reactivation (resumes execution) - Result retrieval

Specified by:

get in interface DurableFuture<T>

Specified by:

get in class SerializableDurableOperation<T>

Returns:

the operation result