com.netflix.loadbalancer

Class BestAvailableRule

java.lang.Object

com.netflix.loadbalancer.AbstractLoadBalancerRule

com.netflix.loadbalancer.ClientConfigEnabledRoundRobinRule

com.netflix.loadbalancer.BestAvailableRule

All Implemented Interfaces:

com.netflix.client.IClientConfigAware, IRule

public class BestAvailableRule
extends ClientConfigEnabledRoundRobinRule

A rule that skips servers with "tripped" circuit breaker and picks the server with lowest concurrent requests.

This rule should typically work with ServerListSubsetFilter which puts a limit on the servers that is visible to the rule. This ensure that it only needs to find the minimal concurrent requests among a small number of servers. Also, each client will get a random list of servers which avoids the problem that one server with the lowest concurrent requests is chosen by a large number of clients and immediately gets overwhelmed.

Constructor Summary

Constructors

Constructor and Description
BestAvailableRule()

Method Summary

Methods

Modifier and Type	Method and Description
Server	choose(java.lang.Object key)
void	setLoadBalancer(ILoadBalancer lb)

Methods inherited from class com.netflix.loadbalancer.ClientConfigEnabledRoundRobinRule

initWithNiwsConfig

Methods inherited from class com.netflix.loadbalancer.AbstractLoadBalancerRule

getLoadBalancer

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BestAvailableRule

public BestAvailableRule()

Method Detail

choose

public Server choose(java.lang.Object key)

Specified by:

choose in interface IRule

Overrides:

choose in class ClientConfigEnabledRoundRobinRule

setLoadBalancer

public void setLoadBalancer(ILoadBalancer lb)

Specified by:

setLoadBalancer in interface IRule

Overrides:

setLoadBalancer in class ClientConfigEnabledRoundRobinRule