Package org.apache.pulsar.broker.loadbalance

Interface ModularLoadManagerStrategy

All Known Implementing Classes:

AvgShedder, LeastLongTermMessageRate, LeastResourceUsageWithWeight, RoundRobinBrokerSelector

public interface ModularLoadManagerStrategy

Interface which serves as a component for ModularLoadManagerImpl, flexibly allowing the injection of potentially complex strategies.

Method Summary

Modifier and Type	Method	Description
static ModularLoadManagerStrategy	create(ServiceConfiguration conf)	Create a placement strategy using the configuration.
default void	onActiveBrokersChange(Set<String> activeBrokers)	Triggered when active brokers change.
Optional<String>	selectBroker(Set<String> candidates, org.apache.pulsar.policies.data.loadbalancer.BundleData bundleToAssign, LoadData loadData, ServiceConfiguration conf)	Find a suitable broker to assign the given bundle to.

Method Details

selectBroker

Optional<String> selectBroker(Set<String> candidates,
 org.apache.pulsar.policies.data.loadbalancer.BundleData bundleToAssign,
 LoadData loadData,
 ServiceConfiguration conf)

Find a suitable broker to assign the given bundle to.

Parameters:

candidates - The candidates for which the bundle may be assigned.

bundleToAssign - The data for the bundle to assign.

loadData - The load data from the leader broker.

conf - The service configuration.

Returns:

The name of the selected broker as it appears on ZooKeeper.

onActiveBrokersChange

default void onActiveBrokersChange(Set<String> activeBrokers)

Triggered when active brokers change.

create

static ModularLoadManagerStrategy create(ServiceConfiguration conf)

Create a placement strategy using the configuration.

Parameters:

conf - ServiceConfiguration to use.

Returns:

A placement strategy from the given configurations.