2 * ============LICENSE_START=======================================================
3 * DCAEGEN2-SERVICES-SDK
4 * ================================================================================
5 * Copyright (C) 2019-2021 Nokia. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
20 package org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api;
22 import org.jetbrains.annotations.NotNull;
23 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RxHttpClient;
24 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RxHttpClientFactory;
25 import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.impl.CbsClientConfigMap;
26 import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.impl.CbsClientRest;
27 import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.impl.CbsLookup;
28 import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.CbsClientConfiguration;
29 import org.onap.dcaegen2.services.sdk.security.ssl.TrustStoreKeys;
30 import reactor.core.publisher.Mono;
34 * Factory for Config Binding Service client.
39 public class CbsClientFactory {
41 * <p>Creates Mono which will emit instance of {@link CbsClient} when service discovery is complete.</p>
44 * This method will do a lookup of Config Binding Service and create client configured with found address.
45 * Created client will be published in returned Mono instance.
48 * In case of failure during CBS resolution, returned Mono will emit error signal with possible cause.
49 * User is expected to handle this signal and possibly retry subscription to returned Mono.
52 * @param configuration required CBS configuration as viewed by client application
53 * @return non-null {@link Mono} of {@link CbsClient} instance
56 public static @NotNull Mono<CbsClient> createCbsClient(CbsClientConfiguration configuration) {
57 return Mono.fromCallable(() -> buildHttpClient(configuration.trustStoreKeys()))
59 .flatMap(httpClient -> createCbsClientMono(httpClient, configuration));
62 private static RxHttpClient buildHttpClient(TrustStoreKeys trustStoreKeys) {
63 return trustStoreKeys != null
64 ? RxHttpClientFactory.create(trustStoreKeys)
65 : RxHttpClientFactory.create();
68 private static Mono<CbsClient> createCbsClientMono(RxHttpClient httpClient,
69 CbsClientConfiguration configuration) {
70 CbsClientConfigMap cbsClientConfigMap = new CbsClientConfigMap(configuration.configMapFilePath());
71 return cbsClientConfigMap.verifyConfigMapFile() ? Mono.just(cbsClientConfigMap) :
72 getConfigFromCBS(httpClient, configuration);
75 private static Mono<CbsClient> getConfigFromCBS(RxHttpClient httpClient, CbsClientConfiguration configuration) {
76 return new CbsLookup().lookup(configuration)
77 .map(addr ->new CbsClientRest(httpClient, configuration.appName(), addr, configuration.protocol()));