blob: 85ee8ba835ac5571178ae1f035bb477581050be6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/*
*
* Copyright (c) 2022. Deutsche Telekom AG
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0
*
*
*/
package org.onap.portal.bff.config.clients;
import java.time.Duration;
import java.util.List;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.onap.portal.bff.exceptions.DownstreamApiProblemException;
import org.springframework.http.HttpStatus;
import org.springframework.http.client.reactive.ClientHttpConnector;
import org.springframework.http.client.reactive.ReactorClientHttpConnector;
import org.springframework.web.reactive.function.client.ExchangeFilterFunction;
import org.springframework.web.reactive.function.client.WebClient;
import reactor.core.publisher.Mono;
import reactor.netty.http.client.HttpClient;
import reactor.netty.resources.ConnectionProvider;
@Slf4j
@RequiredArgsConstructor
public abstract class AbstractClientConfig<E> {
private final Class<E> errorResponseTypeClass;
protected ExchangeFilterFunction errorHandlingExchangeFilterFunction() {
return ExchangeFilterFunction.ofResponseProcessor(
clientResponse -> {
if (clientResponse.statusCode().isError()) {
return clientResponse
.bodyToMono(errorResponseTypeClass)
.doOnNext(s -> log.error("Received error response from downstream: {}", s))
.flatMap(
problemResponse ->
Mono.error(mapException(problemResponse, clientResponse.statusCode())));
}
return Mono.just(clientResponse);
});
}
protected abstract DownstreamApiProblemException mapException(
E errorResponse, HttpStatus httpStatus);
protected ClientHttpConnector getClientHttpConnector() {
// ConnectionTimeouts introduced due to
// io.netty.channel.unix.Errors$NativeIoException: readAddress(..) failed: Connection reset by
// peer issue
// https://github.com/reactor/reactor-netty/issues/1774#issuecomment-908066283
ConnectionProvider connectionProvider =
ConnectionProvider.builder("fixed")
.maxConnections(500)
.maxIdleTime(Duration.ofSeconds(20))
.maxLifeTime(Duration.ofSeconds(60))
.pendingAcquireTimeout(Duration.ofSeconds(60))
.evictInBackground(Duration.ofSeconds(120))
.build();
return new ReactorClientHttpConnector(HttpClient.create(connectionProvider));
}
protected WebClient getWebClient(
WebClient.Builder webClientBuilder, List<ExchangeFilterFunction> filters) {
if (filters != null) {
filters.forEach(webClientBuilder::filter);
}
return webClientBuilder
.filter(errorHandlingExchangeFilterFunction())
.clientConnector(getClientHttpConnector())
.build();
}
}
|
