org.apache.beam.fn.harness.control

Interface BundleSplitListener

All Known Implementing Classes:

BundleSplitListener.InMemory

public interface BundleSplitListener

Listens to splits happening to a single bundle application. See Breaking the Fusion Barrier for a discussion of the design.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	BundleSplitListener.InMemory A BundleSplitListener which gathers all splits produced and stores them in memory.

Method Summary

Modifier and Type	Method and Description
void	split(java.util.List<org.apache.beam.model.fnexecution.v1.BeamFnApi.BundleApplication> primaryRoots, java.util.List<org.apache.beam.model.fnexecution.v1.BeamFnApi.DelayedBundleApplication> residualRoots) Signals that the current application should be split into the given primary and residual roots.

Method Detail

split

void split(java.util.List<org.apache.beam.model.fnexecution.v1.BeamFnApi.BundleApplication> primaryRoots,
           java.util.List<org.apache.beam.model.fnexecution.v1.BeamFnApi.DelayedBundleApplication> residualRoots)

Signals that the current application should be split into the given primary and residual roots.

Primary roots are the new decomposition of the bundle's work into transform applications that have happened or will happen as part of this bundle (modulo future splits). Residual roots are a decomposition of work that has been given away by the bundle, so the runner must delegate it for someone else to execute.