org.apache.flink.runtime.webmonitor.stats

Interface JobVertexStatsTracker<T extends Statistics>

Type Parameters:

T - Type of statistics to track

All Known Implementing Classes:

JobVertexThreadInfoTracker

public interface JobVertexStatsTracker<T extends Statistics>

Interface for a tracker of statistics for AccessExecutionJobVertex.

Method Summary

Modifier and Type	Method and Description
Optional<T>	getVertexStats(org.apache.flink.api.common.JobID jobId, AccessExecutionJobVertex vertex) Returns statistics for a job vertex.
void	shutDown() Shuts the JobVertexStatsTracker down.

Method Detail

getVertexStats

Optional<T> getVertexStats(org.apache.flink.api.common.JobID jobId,
                           AccessExecutionJobVertex vertex)

Returns statistics for a job vertex. Automatically triggers sampling request if statistics are not available or outdated.

Parameters:

jobId - job the vertex belongs to

vertex - Vertex to get the stats for.

Returns:

Statistics for a vertex. This interface is intended to be used for polling request and for the duration while the statistics are being gathered, the returned Optional can be empty.

shutDown

void shutDown()
       throws org.apache.flink.util.FlinkException

Shuts the JobVertexStatsTracker down.

Throws:

org.apache.flink.util.FlinkException - if the JobVertexStatsTracker could not be shut down