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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 java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Optional;
import org.apache.http.HttpEntity;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.util.EntityUtils;
import org.onap.dcaegen2.services.prh.config.DmaapConsumerConfiguration;
import org.onap.dcaegen2.services.prh.service.DmaapHttpClientImpl;
import org.onap.dcaegen2.services.prh.service.HttpUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ExtendedDmaapConsumerHttpClientImpl {
private static Logger logger = LoggerFactory.getLogger(ExtendedDmaapConsumerHttpClientImpl.class);
private final CloseableHttpClient closeableHttpClient;
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 dmaapContentType;
public ExtendedDmaapConsumerHttpClientImpl(DmaapConsumerConfiguration configuration) {
this.closeableHttpClient = new DmaapHttpClientImpl(configuration).getHttpClient();
this.dmaapHostName = configuration.dmaapHostName();
this.dmaapProtocol = configuration.dmaapProtocol();
this.dmaapPortNumber = configuration.dmaapPortNumber();
this.dmaapTopicName = configuration.dmaapTopicName();
this.consumerGroup = configuration.consumerGroup();
this.consumerId = configuration.consumerId();
this.dmaapContentType = configuration.dmaapContentType();
}
public Optional<String> getHttpConsumerResponse() {
try {
return createRequest()
.flatMap(this::executeHttpClient);
} catch (URISyntaxException e) {
logger.warn("Exception while executing HTTP request: ", e);
}
return Optional.empty();
}
private Optional<String> executeHttpClient(HttpRequestBase httpRequestBase) {
try {
return closeableHttpClient.execute(httpRequestBase, getDmaapConsumerResponseHandler());
} catch (IOException e) {
logger.warn("Exception while executing HTTP request: ", e);
}
return Optional.empty();
}
private Optional<HttpRequestBase> createRequest() throws URISyntaxException {
return "application/json".equals(dmaapContentType)
? createDmaapConsumerExtendedURI().map(this::createHttpRequest)
: Optional.empty();
}
private HttpRequestBase createHttpRequest(URI extendedURI) {
HttpRequestBase httpRequestBase = new HttpGet(extendedURI);
httpRequestBase.addHeader("Content-type", dmaapContentType);
return httpRequestBase;
}
private String createRequestPath() {
return dmaapTopicName + "/" + consumerGroup + "/" + consumerId;
}
private Optional<URI> createDmaapConsumerExtendedURI() throws URISyntaxException {
return Optional.ofNullable(new URIBuilder()
.setScheme(dmaapProtocol)
.setHost(dmaapHostName)
.setPort(dmaapPortNumber)
.setPath(createRequestPath()).build());
}
private ResponseHandler<Optional<String>> getDmaapConsumerResponseHandler() {
return httpResponse -> {
final int responseCode = httpResponse.getStatusLine().getStatusCode();
logger.info("Status code of operation: {}", responseCode);
final HttpEntity responseEntity = httpResponse.getEntity();
if (HttpUtils.isSuccessfulResponseCode(responseCode)) {
logger.trace("HTTP response successful.");
final String dmaapResponse = EntityUtils.toString(responseEntity);
return Optional.of(dmaapResponse);
} else {
String dmaapResponse = responseEntity != null ? EntityUtils.toString(responseEntity) : "";
logger.trace("HTTP response not successful : {}", dmaapResponse);
return Optional.of(String.valueOf(responseCode));
}
};
}
}
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