org.apache.druid.server

Interface QueryLaningStrategy

All Known Implementing Classes:

HiLoQueryLaningStrategy, ManualQueryLaningStrategy, NoQueryLaningStrategy

public interface QueryLaningStrategy

Method Summary

Modifier and Type	Method and Description
<T> Optional<String>	computeLane(QueryPlus<T> query, Set<SegmentServerSelector> segments) For a given QueryPlus and set of SegmentServerSelector, compute if a query belongs to a lane This method must be thread safe
default int	computeLimitFromPercent(int totalLimit, int value)
it.unimi.dsi.fastutil.objects.Object2IntMap<String>	getLaneLimits(int totalLimit) Provide a map of lane names to the limit on the number of concurrent queries for that lane

Method Detail

getLaneLimits

it.unimi.dsi.fastutil.objects.Object2IntMap<String> getLaneLimits(int totalLimit)

Provide a map of lane names to the limit on the number of concurrent queries for that lane

Parameters:

totalLimit -

computeLane

<T> Optional<String> computeLane(QueryPlus<T> query,
                                 Set<SegmentServerSelector> segments)

For a given QueryPlus and set of SegmentServerSelector, compute if a query belongs to a lane This method must be thread safe

computeLimitFromPercent

default int computeLimitFromPercent(int totalLimit,
                                    int value)