diff options
Diffstat (limited to 'rest-services/cbs-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/cbs/client/providers/ReactiveCloudConfigurationProvider.java')
| -rw-r--r-- | rest-services/cbs-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/cbs/client/providers/ReactiveCloudConfigurationProvider.java | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/rest-services/cbs-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/cbs/client/providers/ReactiveCloudConfigurationProvider.java b/rest-services/cbs-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/cbs/client/providers/ReactiveCloudConfigurationProvider.java new file mode 100644 index 00000000..a50edd38 --- /dev/null +++ b/rest-services/cbs-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/cbs/client/providers/ReactiveCloudConfigurationProvider.java @@ -0,0 +1,139 @@ +/* + * ============LICENSE_START======================================================= + * DCAEGEN2-SERVICES-SDK + * ================================================================================ + * Copyright (C) 2018-2019 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.sdk.rest.services.cbs.client.providers; + +import com.google.gson.JsonArray; +import com.google.gson.JsonObject; +import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpMethod; +import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpRequest; +import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.ImmutableHttpRequest; +import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RxHttpClient; +import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RxHttpClientFactory; +import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.CbsClientConfiguration; +import org.onap.dcaegen2.services.sdk.rest.services.uri.URI; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import reactor.core.publisher.Mono; + +/** + * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 11/15/18 + */ +public final class ReactiveCloudConfigurationProvider implements CloudConfigurationProvider { + + private static final Logger LOGGER = LoggerFactory.getLogger(ReactiveCloudConfigurationProvider.class); + private static final String EXCEPTION_MESSAGE = "Unsupported method call: "; + + private final RxHttpClient rxHttpClient; + + public ReactiveCloudConfigurationProvider() { + this(RxHttpClientFactory.create()); + } + + ReactiveCloudConfigurationProvider(RxHttpClient rxHttpClient) { + this.rxHttpClient = rxHttpClient; + } + + @Override + public Mono<JsonObject> callForServiceConfigurationReactive(CbsClientConfiguration configuration) { + return callConsulForConfigBindingServiceEndpoint(configuration) + .flatMap(this::callConfigBindingServiceForConfiguration); + } + + @Override + public Mono<JsonObject> callForServiceConfigurationReactive(String consulHost, int consulPort, String cbsName, + String appName) { + throw new UnsupportedOperationException(EXCEPTION_MESSAGE + this); + } + + @Override + public JsonObject callForServiceConfiguration(String consulHost, int consulPort, String cbsName, String appName) { + throw new UnsupportedOperationException(EXCEPTION_MESSAGE + this); + } + + @Override + public JsonObject callForServiceConfiguration(CbsClientConfiguration configuration) { + throw new UnsupportedOperationException(EXCEPTION_MESSAGE + this); + } + + private Mono<String> callConsulForConfigBindingServiceEndpoint(CbsClientConfiguration configuration) { + LOGGER.info("Retrieving Config Binding Service endpoint from Consul"); + + HttpRequest httpRequest = ImmutableHttpRequest.builder() + .url(getConsulUrl(configuration)).method(HttpMethod.GET).build(); + + return rxHttpClient.call(httpRequest) + .map(resp -> resp.bodyAsJson(JsonArray.class)) + .flatMap(jsonArray -> + this.createConfigBindingServiceUrl( + jsonArray, + configuration.appName()) + ); + } + + private String getConsulUrl(CbsClientConfiguration configuration) { + return getUri(configuration.consulHost(), configuration.consulPort(), "/v1/catalog/service", + configuration.cbsName()); + } + + private Mono<JsonObject> callConfigBindingServiceForConfiguration(String configBindingServiceUri) { + LOGGER.info("Retrieving configuration"); + HttpRequest httpRequest = ImmutableHttpRequest.builder() + .url(configBindingServiceUri).method(HttpMethod.GET).build(); + + return rxHttpClient.call(httpRequest) + .map(httpResponse -> httpResponse.bodyAsJson(JsonObject.class)); + } + + + private Mono<String> createConfigBindingServiceUrl(JsonArray jsonArray, String appName) { + return getConfigBindingObject(jsonArray) + .flatMap(jsonObject -> buildConfigBindingServiceUrl(jsonObject, appName)); + } + + private Mono<String> buildConfigBindingServiceUrl(JsonObject jsonObject, String appName) { + return Mono.just(getUri(jsonObject.get("ServiceAddress").getAsString(), + jsonObject.get("ServicePort").getAsInt(), "/service_component", appName)); + } + + private Mono<JsonObject> getConfigBindingObject(JsonArray jsonArray) { + try { + if (jsonArray.size() > 0) { + return Mono.just(jsonArray.get(0).getAsJsonObject()); + } else { + throw new IllegalStateException("JSON Array was empty"); + } + } catch (IllegalStateException e) { + LOGGER.warn("Failed to retrieve JSON Object from array", e); + return Mono.error(e); + } + } + + private String getUri(String host, Integer port, String... paths) { + return new URI.URIBuilder() + .scheme("http") + .host(host) + .port(port) + .path(String.join("/", paths)) + .build().toString(); + } + +}
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