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/*
* ============LICENSE_START=======================================================
* DCAEGEN2-SERVICES-SDK
* ================================================================================
* Copyright (C) 2019-2020 Nokia. 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.api;
import org.jetbrains.annotations.NotNull;
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.impl.CbsClientImpl;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.impl.CbsLookup;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.CbsClientConfiguration;
import org.onap.dcaegen2.services.sdk.security.ssl.TrustStoreKeys;
import reactor.core.publisher.Mono;
/**
* <p>
* Factory for Config Binding Service client.
* </p>
*
* @since 1.1.2
*/
public class CbsClientFactory {
/**
* <p>Creates Mono which will emit instance of {@link CbsClient} when service discovery is complete.</p>
*
* <p>
* This method will do a lookup of Config Binding Service and create client configured with found address.
* Created client will be published in returned Mono instance.
* </p>
* <p>
* In case of failure during CBS resolution, returned Mono will emit error signal with possible cause.
* User is expected to handle this signal and possibly retry subscription to returned Mono.
* </p>
*
* @param configuration required CBS configuration as viewed by client application
* @return non-null {@link Mono} of {@link CbsClient} instance
* @since 1.1.2
*/
public static @NotNull Mono<CbsClient> createCbsClient(CbsClientConfiguration configuration) {
return Mono.fromCallable(() -> buildHttpClient(configuration.trustStoreKeys()))
.cache()
.flatMap(httpClient -> createCbsClientMono(httpClient, configuration));
}
private static RxHttpClient buildHttpClient(TrustStoreKeys trustStoreKeys) {
return trustStoreKeys != null
? RxHttpClientFactory.create(trustStoreKeys)
: RxHttpClientFactory.create();
}
private static Mono<CbsClient> createCbsClientMono(RxHttpClient httpClient,
CbsClientConfiguration configuration) {
return new CbsLookup().lookup(configuration)
.map(addr -> new CbsClientImpl(httpClient, configuration.appName(), addr, configuration.protocol()));
}
}
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