com.netflix.loadbalancer

Class AvailabilityFilteringRule

java.lang.Object

com.netflix.loadbalancer.AbstractLoadBalancerRule

com.netflix.loadbalancer.ClientConfigEnabledRoundRobinRule

com.netflix.loadbalancer.PredicateBasedRule

com.netflix.loadbalancer.AvailabilityFilteringRule

All Implemented Interfaces:

com.netflix.client.IClientConfigAware, IRule

public class AvailabilityFilteringRule
extends PredicateBasedRule

A load balancer rule that filters out servers that:

• are in circuit breaker tripped state due to consecutive connection or read failures, or
• have active connections that exceeds a configurable limit (default is Integer.MAX_VALUE).

The property to change this limit is

 
 <clientName>.<nameSpace>.ActiveConnectionsLimit
 
 

Constructor Summary

Constructors

Constructor and Description
AvailabilityFilteringRule()

Method Summary

Modifier and Type	Method and Description
Server	choose(java.lang.Object key) This method is overridden to provide a more efficient implementation which does not iterate through all servers.
int	getAvailableServersCount()
AbstractServerPredicate	getPredicate() Method that provides an instance of AbstractServerPredicate to be used by this class.
void	initWithNiwsConfig(com.netflix.client.config.IClientConfig clientConfig)

Methods inherited from class com.netflix.loadbalancer.ClientConfigEnabledRoundRobinRule

setLoadBalancer

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

AvailabilityFilteringRule

public AvailabilityFilteringRule()

Method Detail

initWithNiwsConfig

public void initWithNiwsConfig(com.netflix.client.config.IClientConfig clientConfig)

Specified by:

initWithNiwsConfig in interface com.netflix.client.IClientConfigAware

Overrides:

initWithNiwsConfig in class ClientConfigEnabledRoundRobinRule

getAvailableServersCount

@Monitor(name="AvailableServersCount",
         type=GAUGE)
public int getAvailableServersCount()

choose

public Server choose(java.lang.Object key)

This method is overridden to provide a more efficient implementation which does not iterate through all servers. This is under the assumption that in most cases, there are more available instances than not.

Specified by:

choose in interface IRule

Overrides:

choose in class PredicateBasedRule

getPredicate

public AbstractServerPredicate getPredicate()

Description copied from class: PredicateBasedRule

Method that provides an instance of AbstractServerPredicate to be used by this class.

Specified by:

getPredicate in class PredicateBasedRule