durable-execution-sdk-js.operationsubtype.md

December 2, 2025 · View on GitHub

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OperationSubType enum

Operation subtype enumeration for categorizing different types of durable operations.

This enum provides fine-grained classification of durable operations beyond the basic operation types. Subtypes enable improved observability for specific operation patterns.

Each subtype corresponds to a specific durable context method or execution pattern.

Signature:

export declare enum OperationSubType

Enumeration Members

Member	Value	Description
CALLBACK	`"Callback"`	A callback creation operation (`context.createCallback`). Represents the creation of a callback that external systems can complete. Used for human-in-the-loop workflows and external system integration.
CHAINED_INVOKE	`"ChainedInvoke"`	A chained invocation operation (`context.invoke`). Represents calling another durable function with input parameters and waiting for its completion. Used for function composition and workflows.
MAP	`"Map"`	A map operation (`context.map`). Represents parallel processing of an array of items with concurrency control and completion policies. Each map operation coordinates multiple iterations.
MAP_ITERATION	`"MapIteration"`	An individual iteration within a map operation. Represents the processing of a single item within a `context.map` call. Each iteration runs in its own child context with isolated state.
PARALLEL	`"Parallel"`	A parallel execution operation (`context.parallel`). Represents concurrent execution of multiple branches with optional concurrency control and completion policies.
PARALLEL_BRANCH	`"ParallelBranch"`	An individual branch within a parallel operation. Represents a single branch of execution within a `context.parallel` call. Each branch runs in its own child context with isolated state.
RUN_IN_CHILD_CONTEXT	`"RunInChildContext"`	A child context operation (`context.runInChildContext`). Represents execution within an isolated child context with its own step counter and state tracking. Used for grouping related operations.
STEP	`"Step"`	A durable step operation (`context.step`). Represents atomic operations with automatic retry and checkpointing. Steps are the fundamental building blocks of durable executions.
WAIT	`"Wait"`	A wait operation (`context.wait`). Represents time-based delays that pause execution for a specified duration. Waits allow long-running workflows without keeping invocations active.
WAIT_FOR_CALLBACK	`"WaitForCallback"`	A wait for callback operation (`context.waitForCallback`). Represents waiting for an external system to complete a callback, combining callback creation with submission logic.
WAIT_FOR_CONDITION	`"WaitForCondition"`	A wait for condition operation (`context.waitForCondition`). Represents periodic checking of a condition until it's met, with configurable polling intervals and wait strategies.