com.google.cloud.dataflow.sdk.util

Interface ExecutionContext

All Known Implementing Classes:

BaseExecutionContext, BatchModeExecutionContext, DataflowExecutionContext, DirectModeExecutionContext, StreamingModeExecutionContext

public interface ExecutionContext

Context for the current execution. This is guaranteed to exist during processing, but does not necessarily persist between different batches of work.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	ExecutionContext.StepContext Per-step, per-key context used for retrieving state.

Method Summary

Modifier and Type	Method and Description
Collection<ExecutionContext.StepContext>	getAllStepContexts() Returns a collection view of all of the ExecutionContext.StepContexts.
ExecutionContext.StepContext	getStepContext(String stepName, String transformName) Returns the ExecutionContext.StepContext associated with the given step.
void	noteOutput(WindowedValue<?> output) Hook for subclasses to implement that will be called whenever DoFn.Context.output(OutputT) is called.
void	noteSideOutput(TupleTag<?> tag, WindowedValue<?> output) Hook for subclasses to implement that will be called whenever DoFn.Context.sideOutput(com.google.cloud.dataflow.sdk.values.TupleTag<T>, T) is called.

Method Detail

getStepContext

ExecutionContext.StepContext getStepContext(String stepName,
                                            String transformName)

Returns the ExecutionContext.StepContext associated with the given step.

getAllStepContexts

Collection<ExecutionContext.StepContext> getAllStepContexts()

Returns a collection view of all of the ExecutionContext.StepContexts.

noteOutput

void noteOutput(WindowedValue<?> output)

Hook for subclasses to implement that will be called whenever DoFn.Context.output(OutputT) is called.

noteSideOutput

void noteSideOutput(TupleTag<?> tag,
                    WindowedValue<?> output)

Hook for subclasses to implement that will be called whenever DoFn.Context.sideOutput(com.google.cloud.dataflow.sdk.values.TupleTag<T>, T) is called.