com.netflix.loadbalancer

Class PredicateBasedRule

java.lang.Object

com.netflix.loadbalancer.AbstractLoadBalancerRule

com.netflix.loadbalancer.ClientConfigEnabledRoundRobinRule

com.netflix.loadbalancer.PredicateBasedRule

All Implemented Interfaces:

com.netflix.client.IClientConfigAware, IRule

Direct Known Subclasses:

AvailabilityFilteringRule, ZoneAvoidanceRule

public abstract class PredicateBasedRule
extends ClientConfigEnabledRoundRobinRule

A rule which delegates the server filtering logic to an instance of AbstractServerPredicate. After filtering, a server is returned from filtered list in a round robin fashion.

Nested Class Summary

Nested classes/interfaces inherited from interface com.netflix.client.IClientConfigAware

com.netflix.client.IClientConfigAware.Factory

Constructor Summary

Constructors

Constructor and Description
PredicateBasedRule()

Method Summary

Modifier and Type	Method and Description
Server	choose(java.lang.Object key) Get a server by calling AbstractServerPredicate.chooseRandomlyAfterFiltering(java.util.List, Object).
abstract AbstractServerPredicate	getPredicate() Method that provides an instance of AbstractServerPredicate to be used by this class.

Methods inherited from class com.netflix.loadbalancer.ClientConfigEnabledRoundRobinRule

initWithNiwsConfig, 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

Methods inherited from interface com.netflix.client.IClientConfigAware

initWithNiwsConfig

Constructor Detail

PredicateBasedRule

public PredicateBasedRule()

Method Detail

getPredicate

public abstract AbstractServerPredicate getPredicate()

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

choose

public Server choose(java.lang.Object key)

Get a server by calling AbstractServerPredicate.chooseRandomlyAfterFiltering(java.util.List, Object). The performance for this method is O(n) where n is number of servers to be filtered.

Specified by:

choose in interface IRule

Overrides:

choose in class ClientConfigEnabledRoundRobinRule