org.springframework.cloud.loadbalancer.core

Class HealthCheckServiceInstanceListSupplier

java.lang.Object

org.springframework.cloud.loadbalancer.core.DelegatingServiceInstanceListSupplier

org.springframework.cloud.loadbalancer.core.HealthCheckServiceInstanceListSupplier

All Implemented Interfaces:

Supplier<Flux<List<ServiceInstance>>>, org.springframework.beans.factory.DisposableBean, org.springframework.beans.factory.InitializingBean, ServiceInstanceListSupplier

public class HealthCheckServiceInstanceListSupplier
extends DelegatingServiceInstanceListSupplier
implements org.springframework.beans.factory.InitializingBean, org.springframework.beans.factory.DisposableBean

A ServiceInstanceListSupplier implementation that verifies whether the instances are alive and only returns the healthy one, unless there are none. Uses WebClient to ping the health endpoint of the instances.

Since:

2.2.0

Author:

Olga Maciaszek-Sharma, Roman Matiushchenko

Nested Class Summary

Nested classes/interfaces inherited from interface org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier

ServiceInstanceListSupplier.FixedServiceInstanceListSupplier

Field Summary

Fields inherited from class org.springframework.cloud.loadbalancer.core.DelegatingServiceInstanceListSupplier

delegate

Constructor Summary

Constructors

Constructor and Description
HealthCheckServiceInstanceListSupplier(ServiceInstanceListSupplier delegate, LoadBalancerProperties.HealthCheck healthCheck, org.springframework.web.reactive.function.client.WebClient webClient)

Method Summary

Modifier and Type	Method and Description
void	afterPropertiesSet()
void	destroy()
Flux<List<ServiceInstance>>	get()
protected Flux<List<ServiceInstance>>	healthCheckFlux(List<ServiceInstance> instances)
protected Mono<Boolean>	isAlive(ServiceInstance serviceInstance)

Methods inherited from class org.springframework.cloud.loadbalancer.core.DelegatingServiceInstanceListSupplier

getDelegate, getServiceId

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier

builder, fixed, fixed

Constructor Detail

HealthCheckServiceInstanceListSupplier

public HealthCheckServiceInstanceListSupplier(ServiceInstanceListSupplier delegate,
                                              LoadBalancerProperties.HealthCheck healthCheck,
                                              org.springframework.web.reactive.function.client.WebClient webClient)

Method Detail

afterPropertiesSet

public void afterPropertiesSet()

Specified by:

afterPropertiesSet in interface org.springframework.beans.factory.InitializingBean

Overrides:

afterPropertiesSet in class DelegatingServiceInstanceListSupplier

healthCheckFlux

protected Flux<List<ServiceInstance>> healthCheckFlux(List<ServiceInstance> instances)

get

public Flux<List<ServiceInstance>> get()

Specified by:

get in interface Supplier<Flux<List<ServiceInstance>>>

isAlive

protected Mono<Boolean> isAlive(ServiceInstance serviceInstance)

destroy

public void destroy()

Specified by:

destroy in interface org.springframework.beans.factory.DisposableBean

Overrides:

destroy in class DelegatingServiceInstanceListSupplier