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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Nordix Foundation
* ================================================================================
* 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.openecomp.sdc.be.config;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import org.apache.commons.io.IOUtils;
import org.openecomp.sdc.be.config.exception.LoadConfigurationException;
import org.yaml.snakeyaml.Yaml;
/**
* Singleton that loads and stores the Non Mano configuration
*/
public class NonManoConfigurationManager {
private static NonManoConfigurationManager nonManoConfigurationManager = null;
private NonManoConfiguration nonManoConfiguration;
private NonManoConfigurationManager() {
loadConfiguration();
}
/**
* Loads the configuration yaml from the resources.
*/
private void loadConfiguration() {
final InputStream configYamlAsStream = getClass().getClassLoader().getResourceAsStream("config/nonManoConfig.yaml");
if (configYamlAsStream == null) {
throw new LoadConfigurationException("Expected non-mano configuration file 'config/nonManoConfig.yaml' not found in resources");
}
final String data;
try {
data = IOUtils.toString(configYamlAsStream, String.valueOf(StandardCharsets.UTF_8));
} catch (final IOException e) {
throw new LoadConfigurationException("Could not parse non-mano configuration file 'config/nonManoConfig.yaml' to string", e);
}
nonManoConfiguration = convertFromString(data, NonManoConfiguration.class);
}
public static NonManoConfigurationManager getInstance() {
if (nonManoConfigurationManager == null) {
nonManoConfigurationManager = new NonManoConfigurationManager();
}
return nonManoConfigurationManager;
}
public NonManoConfiguration getNonManoConfiguration() {
return nonManoConfiguration;
}
private <T> T convertFromString(final String yamlContents, final Class<T> className) {
try {
return (new Yaml()).loadAs(yamlContents, className);
} catch (final Exception e) {
throw new
LoadConfigurationException(String.format("Failed to convert YAML %s to object.", yamlContents), e);
}
}
}
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