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/*
* ============LICENSE_START=======================================================
* PNF-REGISTRATION-HANDLER
* ================================================================================
* Copyright (C) 2019 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.tasks;
import static io.netty.handler.codec.http.HttpHeaders.Values.APPLICATION_JSON;
import static java.nio.charset.StandardCharsets.UTF_8;
import static org.apache.http.HttpHeaders.CONTENT_TYPE;
import static org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpMethod.DELETE;
import static org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpMethod.GET;
import static org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpMethod.PUT;
import static org.springframework.web.util.UriUtils.encodeFragment;
import com.google.gson.JsonObject;
import io.vavr.collection.HashMap;
import io.vavr.collection.Map;
import org.onap.dcaegen2.services.prh.adapter.aai.api.AaiPnfResultModel;
import org.onap.dcaegen2.services.prh.adapter.aai.api.ConsumerDmaapModel;
import org.onap.dcaegen2.services.prh.configuration.Config;
import org.onap.dcaegen2.services.prh.exceptions.AaiFailureException;
import org.onap.dcaegen2.services.prh.model.ImmutableRelationshipDict;
import org.onap.dcaegen2.services.prh.model.Relationship;
import org.onap.dcaegen2.services.prh.model.RelationshipDict;
import org.onap.dcaegen2.services.prh.model.bbs.ImmutableLogicalLink;
import org.onap.dcaegen2.services.prh.model.bbs.LogicalLink;
import org.onap.dcaegen2.services.prh.model.utils.HttpUtils;
import org.onap.dcaegen2.services.prh.model.utils.PrhModelAwareGsonBuilder;
import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpResponse;
import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.ImmutableHttpRequest;
import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RequestBody;
import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RxHttpClient;
import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RxHttpClientFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
@Component
public class BbsActionsTaskImpl implements BbsActionsTask {
private static final Logger LOGGER = LoggerFactory.getLogger(BbsActionsTaskImpl.class);
private static final String ATTACHMENT_POINT = "attachment-point";
private static final String LOGICAL_LINK_URI = "/network/logical-links/logical-link";
private static final String PNF_URI = "/network/pnfs/pnf";
private static final String LINK_KEY = "logical-link.link-name";
private static final String ERROR_PREFIX = "Incorrect response when performing BBS-related actions: ";
private static final String LOGICAL_LINK = "logical-link";
private final Config config;
private final RxHttpClient httpClient;
@Autowired
BbsActionsTaskImpl(Config config) {
this(config, RxHttpClientFactory.createInsecure());
}
BbsActionsTaskImpl(Config config, RxHttpClient httpClient) {
this.config = config;
this.httpClient = httpClient;
}
public Mono<ConsumerDmaapModel> execute(ConsumerDmaapModel consumerDmaapModel) {
JsonObject additionalFields = consumerDmaapModel.getAdditionalFields();
if (additionalFields == null || !additionalFields.has(ATTACHMENT_POINT)) {
return Mono.just(consumerDmaapModel);
}
String linkName = additionalFields.get(ATTACHMENT_POINT).getAsString();
if (linkName.isEmpty()) {
LOGGER.warn("Attachment point is empty! Ignore related actions.");
return Mono.just(consumerDmaapModel);
}
String pnfName = consumerDmaapModel.getCorrelationId();
return getLinksByPnf(pnfName)
.flatMap(x -> Flux.fromIterable(x.getRelationshipData()))
.filter(x -> LINK_KEY.equals(x.getRelationshipKey()))
.map(x -> x.getRelationshipValue())
.flatMap(oldLinkName -> getLogicalLink(oldLinkName))
.filter(oldLink -> oldLink.getLinkType().equals(ATTACHMENT_POINT))
.flatMap(oldLink -> deleteLogicalLinkInAai(oldLink.getLinkName(), oldLink.getResourceVersion()))
.then(createLogicalLinkInAai(linkName, pnfName))
.flatMap(response -> handleFinalResponse(response, consumerDmaapModel));
}
private Flux<RelationshipDict> getLinksByPnf(String pnfName) {
return httpClient.call(buildGetRequest(PNF_URI + "/" + pnfName))
.flatMap(response -> handleResponse(response, "GET PNF request. Pnf name: " + pnfName))
.map(httpResponse -> httpResponse.bodyAsJson(UTF_8,
PrhModelAwareGsonBuilder.createGson(), AaiPnfResultModel.class))
.flatMapMany(pnfModel -> Flux.fromStream(pnfModel.getRelationshipList().getRelationship().stream()))
.filter(x -> LOGICAL_LINK.equals(x.getRelatedTo()));
}
private Mono<LogicalLink> getLogicalLink(String linkName) {
ImmutableHttpRequest request = buildGetRequest(LOGICAL_LINK_URI + "/" + linkName);
return httpClient.call(request)
.flatMap(response -> handleResponse(response, "GET LogicalLink request. Link name: " + linkName))
.map(httpResponse -> httpResponse.bodyAsJson(UTF_8,
PrhModelAwareGsonBuilder.createGson(), LogicalLink.class));
}
private Mono<HttpResponse> createLogicalLinkInAai(String linkName, String pnfName) {
ImmutableHttpRequest request = buildLogicalLinkPutRequest(linkName, pnfName);
LOGGER.debug("Creating logical link in AAI {} ", request);
return httpClient.call(request)
.flatMap(response -> handleResponse(response, "PUT LogicalLink request. Link name: " + linkName));
}
private Mono<HttpResponse> deleteLogicalLinkInAai(String linkName, String resourceVersion) {
ImmutableHttpRequest request = buildLogicalLinkDeleteRequest(linkName, resourceVersion);
LOGGER.debug("Deleting logical link in AAI {} ", request);
return httpClient.call(request)
.flatMap(response -> handleResponse(response, "DELETE LogicalLink request. Link name: " + linkName));
}
private ImmutableHttpRequest buildGetRequest(String path) {
String uri = buildUri(path);
Map<String, String> aaiHeaders = HashMap
.ofAll(config.getAaiClientConfiguration().aaiHeaders());
return ImmutableHttpRequest
.builder()
.method(GET)
.url(uri)
.customHeaders(aaiHeaders)
.build();
}
private ImmutableHttpRequest buildLogicalLinkPutRequest(String linkName, String pnfName) {
String uri = buildUri(LOGICAL_LINK_URI + "/" + linkName);
ImmutableLogicalLink logicalLink = prepareModelBuilder(linkName, pnfName).build();
RequestBody requestBody = RequestBody.fromString(PrhModelAwareGsonBuilder.createGson().toJson(logicalLink));
// FIXME: AAI headers for PUT are different than PATCH (taken from prh_endpoints.json)
Map<String, String> aaiHeaders = HashMap
.ofAll(config.getAaiClientConfiguration().aaiHeaders())
.put(CONTENT_TYPE, APPLICATION_JSON);
return ImmutableHttpRequest
.builder()
.method(PUT)
.url(uri)
.body(requestBody)
.customHeaders(aaiHeaders)
.build();
}
private ImmutableHttpRequest buildLogicalLinkDeleteRequest(String linkName, String resourceVersion) {
String uri = buildUri(LOGICAL_LINK_URI + "/" + linkName + "?resource-version=" + resourceVersion);
Map<String, String> aaiHeaders = HashMap
.ofAll(config.getAaiClientConfiguration().aaiHeaders())
.put(CONTENT_TYPE, APPLICATION_JSON);
return ImmutableHttpRequest
.builder()
.method(DELETE)
.url(uri)
.customHeaders(aaiHeaders)
.build();
}
private ImmutableLogicalLink.Builder prepareModelBuilder(String linkName, String pnfName) {
Relationship relationship = org.onap.dcaegen2.services.prh.model.ImmutableRelationship.builder()
.addRelationship(
ImmutableRelationshipDict.builder().relatedLink(PNF_URI + "/" + pnfName).build()).build();
return ImmutableLogicalLink
.builder()
.linkName(linkName)
.linkType(ATTACHMENT_POINT)
.relationshipList(relationship);
}
private Mono<HttpResponse> handleResponse(HttpResponse response, String msg) {
return HttpUtils.isSuccessfulResponseCode(response.statusCode()) ? Mono.just(response) :
Mono.error(new AaiFailureException(ERROR_PREFIX + response.statusCode() + ". Occurred in " + msg));
}
private Mono<? extends ConsumerDmaapModel> handleFinalResponse(
HttpResponse response, ConsumerDmaapModel consumerDmaapModel) {
return HttpUtils.isSuccessfulResponseCode(response.statusCode())
? Mono.just(consumerDmaapModel) : Mono.error(new AaiFailureException(ERROR_PREFIX + response.statusCode()));
}
private String buildUri(String path) {
return config.getAaiClientConfiguration().pnfUrl().replace(PNF_URI, encodeFragment(path, UTF_8));
}
}
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