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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Nordix Foundation.
* ================================================================================
* 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
* ============LICENSE_END=========================================================
*/
package org.onap.policy.clamp.controlloop.participant.http.main.webclient;
import java.lang.invoke.MethodHandles;
import java.time.Duration;
import java.util.Map;
import java.util.Objects;
import org.apache.commons.lang3.tuple.ImmutablePair;
import org.apache.commons.lang3.tuple.Pair;
import org.onap.policy.clamp.controlloop.participant.http.main.exception.HttpWebClientException;
import org.onap.policy.clamp.controlloop.participant.http.main.models.ConfigRequest;
import org.onap.policy.clamp.controlloop.participant.http.main.models.ConfigurationEntity;
import org.onap.policy.clamp.controlloop.participant.http.main.models.RestParams;
import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.web.reactive.function.BodyInserters;
import org.springframework.web.reactive.function.client.WebClient;
import org.springframework.web.util.UriComponentsBuilder;
import reactor.core.publisher.Mono;
public class ClHttpClient implements Runnable {
private static final Logger LOGGER = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
private final ConfigRequest configRequest;
private Map<ToscaConceptIdentifier, Pair<Integer, String>> responseMap;
/**
* Constructor.
*/
public ClHttpClient(ConfigRequest configRequest, Map<ToscaConceptIdentifier, Pair<Integer, String>> responseMap) {
this.configRequest = configRequest;
this.responseMap = responseMap;
}
/**
* Runnable to execute http requests.
*/
@Override
public void run() {
var webClient = WebClient.builder()
.baseUrl(configRequest.getBaseUrl())
.defaultHeaders(httpHeaders -> httpHeaders.addAll(createHeaders(configRequest)))
.build();
for (ConfigurationEntity configurationEntity : configRequest.getConfigurationEntities()) {
LOGGER.info("Executing http requests for the config entity {}",
configurationEntity.getConfigurationEntityId());
executeRequest(webClient, configurationEntity);
}
}
private void executeRequest(WebClient client, ConfigurationEntity configurationEntity) {
// Iterate the sequence of http requests
for (RestParams request: configurationEntity.getRestSequence()) {
String response = null;
try {
var httpMethod = Objects.requireNonNull(HttpMethod.resolve(request.getHttpMethod()));
var uri = createUriString(request);
LOGGER.info("Executing HTTP request: {} for the Rest request id: {}", httpMethod,
request.getRestRequestId());
response = client.method(httpMethod)
.uri(uri)
.body(request.getBody() == null ? BodyInserters.empty()
: BodyInserters.fromValue(request.getBody()))
.exchangeToMono(clientResponse ->
clientResponse.statusCode().value() == request.getExpectedResponse()
? clientResponse.bodyToMono(String.class)
: Mono.error(new HttpWebClientException(clientResponse.statusCode().value(),
clientResponse.bodyToMono(String.class).toString())))
.block(Duration.ofMillis(configRequest.getUninitializedToPassiveTimeout() * 1000L));
LOGGER.info("HTTP response for the {} request : {}", httpMethod, response);
responseMap.put(request.getRestRequestId(), new ImmutablePair<>(request.getExpectedResponse(),
response));
} catch (HttpWebClientException ex) {
LOGGER.error("Error occurred on the HTTP request ", ex);
responseMap.put(request.getRestRequestId(), new ImmutablePair<>(ex.getStatusCode().value(),
ex.getResponseBodyAsString()));
}
}
}
private HttpHeaders createHeaders(ConfigRequest request) {
var headers = new HttpHeaders();
for (Map.Entry<String, String> entry: request.getHttpHeaders().entrySet()) {
headers.add(entry.getKey(), entry.getValue());
}
return headers;
}
private String createUriString(RestParams restParams) {
var uriComponentsBuilder = UriComponentsBuilder.fromUriString(restParams.getPath());
// Add path params if present
if (restParams.getPathParams() != null) {
uriComponentsBuilder.uriVariables(restParams.getPathParams());
}
// Add query params if present
if (restParams.getQueryParams() != null) {
for (Map.Entry<String, String> entry : restParams.getQueryParams().entrySet()) {
uriComponentsBuilder.queryParam(entry.getKey(), entry.getValue());
}
}
return uriComponentsBuilder.build().toUriString();
}
}
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