SpringCloud/spring-cloud-commons
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Merge remote-tracking branch 'origin/2.2.x'

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# Conflicts:
#	docs/src/main/asciidoc/spring-cloud-commons.adoc
#	spring-cloud-commons/src/main/java/org/springframework/cloud/client/loadbalancer/LoadBalancerAutoConfiguration.java
#	spring-cloud-commons/src/main/java/org/springframework/cloud/client/loadbalancer/reactive/ExchangeFilterFunctionUtils.java
#	spring-cloud-commons/src/main/java/org/springframework/cloud/client/loadbalancer/reactive/ReactorLoadBalancerClientAutoConfiguration.java
#	spring-cloud-commons/src/main/java/org/springframework/cloud/client/loadbalancer/reactive/ReactorLoadBalancerExchangeFilterFunction.java
#	spring-cloud-commons/src/main/java/org/springframework/cloud/client/loadbalancer/reactive/RetryableLoadBalancerExchangeFilterFunction.java
#	spring-cloud-commons/src/test/java/org/springframework/cloud/client/loadbalancer/reactive/RetryableLoadBalancerExchangeFilterFunctionIntegrationTests.java
#	spring-cloud-loadbalancer/src/main/java/org/springframework/cloud/loadbalancer/config/BlockingLoadBalancerClientAutoConfiguration.java
This commit is contained in:
Olga MaciaszekSharma
2021-03-12 14:49:19 +01:00
parent 272365490a 3e74ab018d
commit 5c0bc097fa
11 changed files with 273 additions and 22 deletions
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47
docs/src/main/asciidoc/spring-cloud-commons.adoc
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@@ -1085,6 +1085,53 @@ public class CustomLoadBalancerConfiguration {
}
----
=== Transform the load-balanced HTTP request
You can use the selected `ServiceInstance` to transform the load-balanced HTTP Request.
For `RestTemplate`, you need to implement and define `LoadBalancerRequestTransformer` as follows:
[source,java,indent=0]
----
@Bean
public LoadBalancerRequestTransformer transformer() {
return new LoadBalancerRequestTransformer() {
@Override
public HttpRequest transformRequest(HttpRequest request, ServiceInstance instance) {
return new HttpRequestWrapper(request) {
@Override
public HttpHeaders getHeaders() {
HttpHeaders headers = new HttpHeaders();
headers.putAll(super.getHeaders());
headers.add("X-InstanceId", instance.getInstanceId());
return headers;
}
};
}
};
}
----
For `WebClient`, you need to implement and define `LoadBalancerClientRequestTransformer` as follows:
[source,java,indent=0]
----
@Bean
public LoadBalancerClientRequestTransformer transformer() {
return new LoadBalancerClientRequestTransformer() {
@Override
public ClientRequest transformRequest(ClientRequest request, ServiceInstance instance) {
return ClientRequest.from(request)
.header("X-InstanceId", instance.getInstanceId())
.build();
}
};
}
----
If multiple transformers are defined, they are applied in the order in which Beans are defined.
Alternatively, you can use `LoadBalancerRequestTransformer.DEFAULT_ORDER` or `LoadBalancerClientRequestTransformer.DEFAULT_ORDER` to specify the order.
[[spring-cloud-loadbalancer-starter]]
=== Spring Cloud LoadBalancer Starter