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/*
* ============LICENSE_START=======================================================
* PNF-REGISTRATION-HANDLER
* ================================================================================
* Copyright (C) 2018 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.configuration;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonParser;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.Optional;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.CbsClientConfiguration;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.ImmutableCbsClientConfiguration;
import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.ImmutableCbsClientConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.Resource;
import reactor.core.publisher.Mono;
@Configuration
public class ConsulConfigFileReader {
private static final Logger LOGGER = LoggerFactory.getLogger(ConsulConfigFileReader.class);
private static final int DEFAULT_CONSUL_PORT = 8500;
private ImmutableCbsClientConfiguration jsonCbsClientConfiguration;
@Value("classpath:consul_config.json")
private Resource consulConfig;
public Mono<CbsClientConfiguration> evaluate() {
initFileStreamReader();
CbsClientConfiguration cbsClientConfiguration = ImmutableCbsClientConfiguration.builder()
.consulHost(jsonCbsClientConfiguration.consulHost())
.consulPort(Optional.ofNullable(jsonCbsClientConfiguration.consulPort()).orElse(DEFAULT_CONSUL_PORT))
.cbsName(jsonCbsClientConfiguration.cbsName())
.appName(jsonCbsClientConfiguration.appName())
.build();
LOGGER.info("Evaluated variables: {}", cbsClientConfiguration);
return Mono.just(cbsClientConfiguration);
}
private void initFileStreamReader() {
LOGGER.debug("Loading configuration from configuration file");
Gson gson = new Gson();
try (InputStream inputStream = consulConfig.getInputStream()) {
JsonElement rootElement = getJsonElement(inputStream);
if (rootElement.isJsonObject()) {
jsonCbsClientConfiguration = gson.fromJson(rootElement, ImmutableCbsClientConfiguration.class);
}
} catch (IOException e) {
LOGGER.warn("Failed to load/parse file", e);
}
}
private JsonElement getJsonElement(InputStream inputStream) {
return new JsonParser().parse(new InputStreamReader(inputStream, StandardCharsets.UTF_8));
}
}
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