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/*
* ============LICENSE_START=======================================================
* PNF-REGISTRATION-HANDLER
* ================================================================================
* Copyright (C) 2018 NOKIA Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.dcaegen2.services.prh.service.consumer;
import static org.springframework.web.reactive.function.client.ExchangeFilterFunctions.basicAuthentication;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Optional;
import org.apache.http.client.utils.URIBuilder;
import org.onap.dcaegen2.services.prh.config.DmaapConsumerConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.web.reactive.function.client.ExchangeFilterFunction;
import org.springframework.web.reactive.function.client.WebClient;
import reactor.core.publisher.Mono;
/**
* @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 6/26/18
*/
public class DmaapConsumerReactiveHttpClient {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
private WebClient webClient;
private final String dmaapHostName;
private final String dmaapProtocol;
private final Integer dmaapPortNumber;
private final String dmaapTopicName;
private final String consumerGroup;
private final String consumerId;
public DmaapConsumerReactiveHttpClient(DmaapConsumerConfiguration consumerConfiguration) {
this.dmaapHostName = consumerConfiguration.dmaapHostName();
this.dmaapProtocol = consumerConfiguration.dmaapProtocol();
this.dmaapPortNumber = consumerConfiguration.dmaapPortNumber();
this.dmaapTopicName = consumerConfiguration.dmaapTopicName();
this.consumerGroup = consumerConfiguration.consumerGroup();
this.consumerId = consumerConfiguration.consumerId();
String dmaapContentType = consumerConfiguration.dmaapContentType();
this.webClient = WebClient.builder()
.defaultHeader(HttpHeaders.CONTENT_TYPE, dmaapContentType)
.filter(
basicAuthentication(consumerConfiguration.dmaapUserName(), consumerConfiguration.dmaapUserPassword()))
.filter(logRequest())
.filter(logResponse())
.build();
}
public Mono<Optional<String>> getDmaaPConsumerResponse() {
try {
return webClient
.get()
.uri(getUri())
.retrieve()
.onStatus(HttpStatus::is4xxClientError, clientResponse ->
Mono.error(new Exception("HTTP 400"))
)
.onStatus(HttpStatus::is5xxServerError, clientResponse ->
Mono.error(new Exception("HTTP 500")))
.bodyToMono(String.class)
.map(Optional::of);
} catch (URISyntaxException e) {
logger.warn("Exception while executing HTTP request: ", e);
return Mono.error(e);
}
}
private URI getUri() throws URISyntaxException {
return new URIBuilder().setScheme(dmaapProtocol).setHost(dmaapHostName).setPort(dmaapPortNumber)
.setPath(createRequestPath()).build();
}
private String createRequestPath() {
return dmaapTopicName + "/" + consumerGroup + "/" + consumerId;
}
private ExchangeFilterFunction logResponse() {
return ExchangeFilterFunction.ofResponseProcessor(clientResponse -> {
logger.info("Response Status {}", clientResponse.statusCode());
return Mono.just(clientResponse);
});
}
private ExchangeFilterFunction logRequest() {
return ExchangeFilterFunction.ofRequestProcessor(clientRequest -> {
logger.info("Request: {} {}", clientRequest.method(), clientRequest.url());
clientRequest.headers()
.forEach((name, values) -> values.forEach(value -> logger.info("{}={}", name, value)));
return Mono.just(clientRequest);
});
}
}
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