com.netflix.loadbalancer

Class NoOpLoadBalancer

java.lang.Object

com.netflix.loadbalancer.AbstractLoadBalancer

com.netflix.loadbalancer.NoOpLoadBalancer

All Implemented Interfaces:

ILoadBalancer

public class NoOpLoadBalancer
extends AbstractLoadBalancer

A noOp Loadbalancer i.e. doesnt do anything "loadbalancer like"

Nested Class Summary

Nested classes/interfaces inherited from class com.netflix.loadbalancer.AbstractLoadBalancer

AbstractLoadBalancer.ServerGroup

Constructor Summary

Constructors

Constructor and Description
NoOpLoadBalancer()

Method Summary

Modifier and Type	Method and Description
void	addServers(java.util.List<Server> newServers) Initial list of servers.
Server	chooseServer(java.lang.Object key) Choose a server from load balancer.
java.util.List<Server>	getAllServers()
LoadBalancerStats	getLoadBalancerStats() Obtain LoadBalancer related Statistics
java.util.List<Server>	getReachableServers()
java.util.List<Server>	getServerList(AbstractLoadBalancer.ServerGroup serverGroup) List of servers that this Loadbalancer knows about
java.util.List<Server>	getServerList(boolean availableOnly)
void	markServerDown(Server server) To be called by the clients of the load balancer to notify that a Server is down else, the LB will think its still Alive until the next Ping cycle - potentially (assuming that the LB Impl does a ping)

Methods inherited from class com.netflix.loadbalancer.AbstractLoadBalancer

chooseServer

Methods inherited from class java.lang.Object

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

Constructor Detail

NoOpLoadBalancer

public NoOpLoadBalancer()

Method Detail

addServers

public void addServers(java.util.List<Server> newServers)

Description copied from interface: ILoadBalancer

Initial list of servers. This API also serves to add additional ones at a later time The same logical server (host:port) could essentially be added multiple times (helpful in cases where you want to give more "weightage" perhaps ..)

Parameters:

newServers - new servers to add

chooseServer

public Server chooseServer(java.lang.Object key)

Description copied from interface: ILoadBalancer

Choose a server from load balancer.

Parameters:

key - An object that the load balancer may use to determine which server to return. null if the load balancer does not use this parameter.

Returns:

server chosen

getLoadBalancerStats

public LoadBalancerStats getLoadBalancerStats()

Description copied from class: AbstractLoadBalancer

Obtain LoadBalancer related Statistics

Specified by:

getLoadBalancerStats in class AbstractLoadBalancer

getServerList

public java.util.List<Server> getServerList(AbstractLoadBalancer.ServerGroup serverGroup)

Description copied from class: AbstractLoadBalancer

List of servers that this Loadbalancer knows about

Specified by:

getServerList in class AbstractLoadBalancer

Parameters:

serverGroup - Servers grouped by status, e.g., AbstractLoadBalancer.ServerGroup.STATUS_UP

markServerDown

public void markServerDown(Server server)

Description copied from interface: ILoadBalancer

To be called by the clients of the load balancer to notify that a Server is down else, the LB will think its still Alive until the next Ping cycle - potentially (assuming that the LB Impl does a ping)

Parameters:

server - Server to mark as down

getServerList

public java.util.List<Server> getServerList(boolean availableOnly)

Parameters:

availableOnly - if true, only live and available servers should be returned

getReachableServers

public java.util.List<Server> getReachableServers()

Returns:

Only the servers that are up and reachable.

getAllServers

public java.util.List<Server> getAllServers()

Returns:

All known servers, both reachable and unreachable.