Package org.apache.pinot.broker.routing.segmentmetadata

Interface SegmentZkMetadataFetchListener

All Known Subinterfaces:

SegmentPruner

All Known Implementing Classes:

EmptySegmentPruner, MultiPartitionColumnsSegmentPruner, SegmentPartitionMetadataManager, SinglePartitionColumnSegmentPruner, TimeSegmentPruner

public interface SegmentZkMetadataFetchListener

Interface to register with SegmentZkMetadataFetcher.

When registered, SegmentZKMetadataFetcher will fetch ZNRecord for associated onlineSegments list or refreshed segment. Thus batch up all ZK access for segment metadata.

Method Summary

Modifier and Type	Method	Description
void	init(org.apache.helix.model.IdealState idealState, org.apache.helix.model.ExternalView externalView, List<String> onlineSegments, List<org.apache.helix.zookeeper.datamodel.ZNRecord> znRecords)	Initializes the segment pruner with the ideal state, external view and online segments (segments with ONLINE/CONSUMING instances in the ideal state and pre-selected by the SegmentPreSelector).
void	onAssignmentChange(org.apache.helix.model.IdealState idealState, org.apache.helix.model.ExternalView externalView, Set<String> onlineSegments, List<String> pulledSegments, List<org.apache.helix.zookeeper.datamodel.ZNRecord> znRecords)	Processes the segment assignment (ideal state or external view) change based on the given online segments (segments with ONLINE/CONSUMING instances in the ideal state and pre-selected by the SegmentPreSelector).
void	refreshSegment(String segment, org.apache.helix.zookeeper.datamodel.ZNRecord znRecord)	Refreshes the metadata for the given segment (called when segment is getting refreshed).

Method Detail

init

void init(org.apache.helix.model.IdealState idealState,
          org.apache.helix.model.ExternalView externalView,
          List<String> onlineSegments,
          List<org.apache.helix.zookeeper.datamodel.ZNRecord> znRecords)

Initializes the segment pruner with the ideal state, external view and online segments (segments with ONLINE/CONSUMING instances in the ideal state and pre-selected by the SegmentPreSelector). Should be called only once before calling other methods.

onAssignmentChange

void onAssignmentChange(org.apache.helix.model.IdealState idealState,
                        org.apache.helix.model.ExternalView externalView,
                        Set<String> onlineSegments,
                        List<String> pulledSegments,
                        List<org.apache.helix.zookeeper.datamodel.ZNRecord> znRecords)

Processes the segment assignment (ideal state or external view) change based on the given online segments (segments with ONLINE/CONSUMING instances in the ideal state and pre-selected by the SegmentPreSelector).

refreshSegment

void refreshSegment(String segment,
                    @Nullable
                    org.apache.helix.zookeeper.datamodel.ZNRecord znRecord)

Refreshes the metadata for the given segment (called when segment is getting refreshed).