问题描述
使用WebClient我想根据HTTP状态代码分别处理ClientResponse。在下面,您看到顶部doOnSuccess中使用了两个新的subscription()方法。如何将那些嵌套的Monos携带到WebClient的Mono链中?也就是说,如何消除内部单声道。
webClient.post()
.uri( soapServiceUrl )
.contentType(MediaType.TEXT_XML)
//.body(Mono.just(req),String.class )
.body( Mono.just(getCountryRequest),GetCountryRequest.class )
.exchange()
.filter( (ClientResponse response) -> { return true; } )
.doOnSuccess( (ClientResponse response) -> {
//nested mono 1
if( response.statusCode().is5xxServerError() ){
response.toEntity(String.class).doOnSuccess(
error -> {
System.out.println("error : "+ error);
}).subscribe();
}
//nested mono 2
if( response.statusCode().is2xxSuccessful() ){
response.toEntity(GetCountryResponse.class).doOnSuccess(
getCountryResponse -> {
System.out.println("success : "+ getCountryResponse.getBody().getCountry().getCapital());
}).subscribe();
}
})
.doOnError( (Throwable error) -> {
System.out.println( "getCountryResponse.error : "+ error );
})
.subscribe();
解决方法
Webclient的retrieve()
方法具有更好的处理错误代码的方法。
我会这样:
webClient.post()
.uri( soapServiceUrl )
.contentType(MediaType.TEXT_XML)
//.body(Mono.just(req),String.class )
.body( Mono.just(getCountryRequest),GetCountryRequest.class )
.retrieve()
.onStatus(
HttpStatus::isError,clientResponse ->
clientResponse
//get the error response body as a string
.bodyToMono(String.class)
//flatmap the errorResponseBody into a new error signal
.flatMap(
errorResponseBody ->
Mono.error(
new ResponseStatusException(
clientResponse.statusCode(),errorResponseBody))))
//get success response as Mono<GetCountryResponse>
.bodyToMono(GetCountryResponse.class)
.doOnSuccess( (GetCountryResponse response) ->
System.out.println("success : " +
response.getBody().getCountry().getCapital()))
//Response errors will now be logged below
.doOnError(ResponseStatusException.class,error -> {
System.out.println( "getCountryResponse.error : "+ error );
})
.subscribe();