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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;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Map;
import java.util.Objects;
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.AaiClientConfiguration;
import org.onap.dcaegen2.services.prh.model.ConsumerDmaapModel;
import org.onap.dcaegen2.services.prh.model.utils.HttpUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class AaiConsumerClient {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
private final CloseableHttpClient closeableHttpClient;
private final String aaiHost;
private final String aaiProtocol;
private final Integer aaiHostPortNumber;
private final String aaiPath;
private final Map<String, String> aaiHeaders;
/**
* A{@literal &}AI client for consuming data from A{@literal &}AI.
*
* @param aaiClientConfiguration - A{@literal &}AI client config
*/
public AaiConsumerClient(AaiClientConfiguration aaiClientConfiguration) {
closeableHttpClient = new AaiClientImpl(aaiClientConfiguration).getAaiHttpClient();
aaiHost = aaiClientConfiguration.aaiHost();
aaiProtocol = aaiClientConfiguration.aaiProtocol();
aaiHostPortNumber = aaiClientConfiguration.aaiPort();
aaiPath = aaiClientConfiguration.aaiBasePath() + aaiClientConfiguration.aaiPnfPath();
aaiHeaders = aaiClientConfiguration.aaiHeaders();
}
/**
* Function which call http client for getting object from A{@literal &}AI.
*
* @param consumerDmaapModel - helper object for uri generation
* @return - status code of operation
* @throws IOException - Apache HTTP client exception
*/
public Optional<String> getHttpResponse(ConsumerDmaapModel consumerDmaapModel) throws IOException {
Optional<HttpRequestBase> request = createRequest(consumerDmaapModel);
try {
return closeableHttpClient.execute(request.get(), aaiResponseHandler());
} catch (IOException e) {
logger.warn("Exception while executing http client: ", e);
throw new IOException();
}
}
private URI createAaiExtendedUri(String pnfName) {
URI extendedUri = null;
final URIBuilder uriBuilder = new URIBuilder()
.setScheme(aaiProtocol)
.setHost(aaiHost)
.setPort(aaiHostPortNumber)
.setPath(aaiPath + "/" + pnfName);
try {
extendedUri = uriBuilder.build();
logger.trace("Building extended URI: {}", extendedUri);
} catch (URISyntaxException e) {
logger.warn("Exception while building extended URI: {}", e);
}
return extendedUri;
}
private ResponseHandler<Optional<String>> aaiResponseHandler() {
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 aaiResponse = EntityUtils.toString(responseEntity);
return Optional.of(aaiResponse);
} else {
String aaiResponse = responseEntity != null ? EntityUtils.toString(responseEntity) : "";
logger.warn("HTTP response not successful : {}", aaiResponse);
return Optional.of(String.valueOf(responseCode));
}
};
}
private HttpRequestBase createHttpRequest(URI extendedUri) {
return isExtendedUriNotNull(extendedUri) ? new HttpGet(extendedUri) : null;
}
private Boolean isExtendedUriNotNull(URI extendedUri) {
return extendedUri != null;
}
private Optional<HttpRequestBase> createRequest(ConsumerDmaapModel consumerDmaapModel) {
final URI extendedUri = createAaiExtendedUri(consumerDmaapModel.getPnfName());
HttpRequestBase request = createHttpRequest(extendedUri);
aaiHeaders.forEach(Objects.requireNonNull(request)::addHeader);
Objects.requireNonNull(request).addHeader("Content-Type", "application/json");
return Optional.of(request);
}
}
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