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.

Constructor Summary

PredicateBasedRule()

Method Summary

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

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