com.bfd.harpc.loadbalance

接口 LoadBalancingStrategy<K>

所有已知实现类:

RandomStrategy, RoundRobinStrategy

public interface LoadBalancingStrategy<K>

A strategy for balancing request load among backends. Strategies should be externally synchronized, and therefore do not have to worry about reentrant access.

方法概要

方法

限定符和类型	方法和说明
void	addConnectResult(K key, RequestTracker.RequestResult result, long connectTimeNanos) Offers information about a connection result.
K	nextBackend() Gets the next backend that a request should be sent to.
void	offerBackends(Set<K> offeredBackends, Closure<Collection<K>> onBackendsChosen) Offers a set of backends that the load balancer should choose from to distribute load amongst.

方法详细资料

offerBackends

void offerBackends(Set<K> offeredBackends,
                 Closure<Collection<K>> onBackendsChosen)

Offers a set of backends that the load balancer should choose from to distribute load amongst.

参数:

offeredBackends - Backends to choose from.

onBackendsChosen - A callback that should be notified when the offered backends have been (re)chosen from.

nextBackend

K nextBackend()
              throws ResourceExhaustedException

Gets the next backend that a request should be sent to.

返回:

Next backend to send a request.

抛出:

com.lakeside.thrift.ResourceExhaustedException - If there are no available backends.

ResourceExhaustedException

addConnectResult

void addConnectResult(K key,
                    RequestTracker.RequestResult result,
                    long connectTimeNanos)

Offers information about a connection result.

参数:

key - Backend key.

result - Connection result.

connectTimeNanos - Time spent waiting for connection to be established.