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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.onap.dcaegen2.services.prh.model.logging.MdcVariables.REQUEST_ID;
import static org.onap.dcaegen2.services.prh.model.logging.MdcVariables.X_INVOCATION_ID;
import static org.onap.dcaegen2.services.prh.model.logging.MdcVariables.X_ONAP_REQUEST_ID;
import java.net.URI;
import java.util.UUID;
import java.util.function.Consumer;
import org.onap.dcaegen2.services.prh.config.DmaapConsumerConfiguration;
import org.slf4j.MDC;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.web.reactive.function.client.WebClient;
import org.springframework.web.util.DefaultUriBuilderFactory;
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 String dmaapHostName;
private final String dmaapProtocol;
private final Integer dmaapPortNumber;
private final String dmaapTopicName;
private final String consumerGroup;
private final String consumerId;
private final String contentType;
private WebClient webClient;
/**
* Constructor of DMaaPConsumerReactiveHttpClient.
*
* @param consumerConfiguration - DMaaP consumer configuration object
*/
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();
this.contentType = consumerConfiguration.dmaapContentType();
}
/**
* Function for calling DMaaP HTTP consumer - consuming messages from Kafka/DMaaP from topic.
*
* @return reactive response from DMaaP in string format
*/
public Mono<String> getDMaaPConsumerResponse() {
return webClient
.get()
.uri(getUri())
.headers(getHeaders())
.retrieve()
.onStatus(HttpStatus::is4xxClientError, clientResponse ->
Mono.error(new RuntimeException("DmaaPConsumer HTTP " + clientResponse.statusCode()))
)
.onStatus(HttpStatus::is5xxServerError, clientResponse ->
Mono.error(new RuntimeException("DmaaPConsumer HTTP " + clientResponse.statusCode())))
.bodyToMono(String.class);
}
private Consumer<HttpHeaders> getHeaders() {
return httpHeaders -> {
httpHeaders.set(X_ONAP_REQUEST_ID, MDC.get(REQUEST_ID));
httpHeaders.set(X_INVOCATION_ID, UUID.randomUUID().toString());
httpHeaders.set(HttpHeaders.CONTENT_TYPE, contentType);
};
}
private String createRequestPath() {
return dmaapTopicName + "/" + consumerGroup + "/" + consumerId;
}
public DMaaPConsumerReactiveHttpClient createDMaaPWebClient(WebClient webClient) {
this.webClient = webClient;
return this;
}
URI getUri() {
return new DefaultUriBuilderFactory().builder().scheme(dmaapProtocol).host(dmaapHostName).port(dmaapPortNumber)
.path(createRequestPath()).build();
}
}
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