io.micronaut.http.client

Interface LoadBalancer

All Known Implementing Classes:

AbstractRoundRobinLoadBalancer, DiscoveryClientRoundRobinLoadBalancer, FixedLoadBalancer, RibbonLoadBalancer, ServiceInstanceListRoundRobinLoadBalancer

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface LoadBalancer

Interface to abstract server selection. Allows plugging in load balancing strategies.

Since:

1.0

Author:

Graeme Rocher

Method Summary

Modifier and Type	Method and Description
static LoadBalancer	empty()
static LoadBalancer	fixed(URL url) A LoadBalancer that does no load balancing and always hits the given URL.
default Publisher<ServiceInstance>	select()
Publisher<ServiceInstance>	select(Object discriminator)

Method Detail

select

Publisher<ServiceInstance> select(@Nullable
                                  Object discriminator)

Parameters:

discriminator - An object used to discriminate the server to select. Usually the service ID

Returns:

The selected ServiceInstance

select

default Publisher<ServiceInstance> select()

Returns:

The selected ServiceInstance

fixed

static LoadBalancer fixed(URL url)

A LoadBalancer that does no load balancing and always hits the given URL.

Parameters:

url - The URL

Returns:

The LoadBalancer

empty

static LoadBalancer empty()

Returns:

An error because there are no load balancer