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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Nordix Foundation.
* Copyright (C) 2022 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.dcaegen2.services.pmmapper.config;
import com.google.gson.JsonObject;
import org.onap.dcaegen2.services.pmmapper.exceptions.EnvironmentConfigException;
import org.onap.dcaegen2.services.pmmapper.exceptions.MapperConfigException;
import org.onap.dcaegen2.services.pmmapper.model.MapperConfig;
import org.onap.dcaegen2.services.pmmapper.utils.RequiredFieldDeserializer;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.CbsClient;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.CbsRequest;
import org.onap.logging.ref.slf4j.ONAPLogAdapter;
import org.slf4j.LoggerFactory;
import com.google.gson.GsonBuilder;
import reactor.core.publisher.Mono;
/**
* Handles the retrieval of the component spec-based PM-Mapper Configuration
* from DCAE.
*/
public class ConfigHandler {
private static final ONAPLogAdapter logger = new ONAPLogAdapter(LoggerFactory.getLogger(ConfigHandler.class));
private final CbsClient cbsClient;
private final CbsRequest cbsRequest;
private MapperConfig mapperConfig;
/**
* Creates a ConfigHandler based on Cbs Client and Cbs Request provided by DCAE SDK
* @param CbsClient A Cbs Client
* @param CbsRequest A Cbs Request
*/
public ConfigHandler(CbsClient cbsClient, CbsRequest cbsRequest){
this.cbsClient = cbsClient;
this.cbsRequest = cbsRequest;
}
/**
* Retrieves PM-Mapper Configuration from DCAE's ConfigBinding Service.
*
* @throws EnvironmentConfigException
*/
public MapperConfig getMapperConfig() throws EnvironmentConfigException {
Mono.just(cbsClient)
.flatMap(client -> client.get(cbsRequest))
.subscribe(
this::handleConfigurationFromConsul,
this::handleError
);
if (mapperConfig == null) {
logger.unwrap().error("Mapper configuration is not initialized");
throw new EnvironmentConfigException("Mapper configuration is not initialized");
}
return mapperConfig;
}
/**
* Retrieves Initial PM-Mapper Configuration from DCAE's ConfigBinding Service.
*
* @throws MapperConfigException
*/
public MapperConfig getInitialConfiguration() {
logger.unwrap().info("Attempt to get initial configuration");
JsonObject jsonObject = Mono.just(cbsClient)
.flatMap(client -> client.get(cbsRequest))
.block();
handleConfigurationFromConsul(jsonObject);
return mapperConfig;
}
void handleConfigurationFromConsul(JsonObject jsonObject) {
logger.unwrap().info("Attempt to process configuration object");
try {
mapperConfig = new GsonBuilder()
.registerTypeAdapter(MapperConfig.class, new RequiredFieldDeserializer<MapperConfig>())
.create()
.fromJson(jsonObject, MapperConfig.class);
} catch (Exception exception) {
String exceptionMessage = "Error parsing configuration, mapper config: " + mapperConfig;
logger.unwrap().error("Error parsing configuration", exception);
throw new MapperConfigException(exceptionMessage, exception);
}
logger.unwrap().info("PM-mapper configuration processed successful");
logger.unwrap().info("Mapper configuration:\n{}", mapperConfig);
}
private void handleError(Throwable throwable) {
logger.unwrap().error("Unexpected error occurred during fetching configuration", throwable);
}
}
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