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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T 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.openecomp.sdc.notification.config;
import org.onap.sdc.tosca.services.YamlUtil;
import org.openecomp.sdc.logging.api.Logger;
import org.openecomp.sdc.logging.api.LoggerFactory;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.function.BiConsumer;
public class ConfigurationManager {
private static final String CONFIGURATION_YAML_FILE = "onboarding_configuration.yaml";
private static final String NOTIFICATIONS_CONFIG = "notifications";
private LinkedHashMap<String, Object> notificationsConfiguration;
private static final Logger LOGGER = LoggerFactory.getLogger(ConfigurationManager.class);
private static final ConfigurationManager SINGLETON = new ConfigurationManager();
public static ConfigurationManager getInstance() {
return SINGLETON;
}
private ConfigurationManager() {
initConfiguration();
}
private void initConfiguration() {
YamlUtil yamlUtil = new YamlUtil();
readConfigurationFromStream(yamlUtil, (filename, stream) -> {
if (stream == null) {
LOGGER.warn("Configuration not found: " + filename + ". Using defaults");
return;
}
Map<String, LinkedHashMap<String, Object>> configurationMap = yamlUtil.yamlToMap(stream);
if (configurationMap == null) {
LOGGER.warn("Configuration cannot be parsed: " + filename + ". Using defaults");
return;
}
notificationsConfiguration = configurationMap.get(NOTIFICATIONS_CONFIG);
if (notificationsConfiguration == null) {
LOGGER.error(NOTIFICATIONS_CONFIG +
" is missing in configuration file '" + filename + "'. Using defaults");
}
});
}
private void readConfigurationFromStream(YamlUtil yamlUtil,
BiConsumer<String, InputStream> reader) {
String configurationYamlFile = System.getProperty(CONFIGURATION_YAML_FILE);
try {
if (configurationYamlFile == null) {
try (InputStream inputStream =
yamlUtil.loadYamlFileIs("/" + CONFIGURATION_YAML_FILE)) {
reader.accept(CONFIGURATION_YAML_FILE, inputStream);
}
} else {
try (InputStream inputStream = new FileInputStream(configurationYamlFile)) {
reader.accept(configurationYamlFile, inputStream);
}
}
} catch (IOException e) {
LOGGER.error("Failed to read configuration", e);
}
}
public <T> T getConfigValue(String name, T defaultValue) {
Object value = notificationsConfiguration.get(name);
try {
return value == null ? defaultValue : (T) value;
} catch (ClassCastException e) {
LOGGER.warn(String.format("Failed to read configuration property '%s' as requested type. Using default '%s'",
name, defaultValue), e);
return defaultValue;
}
}
}
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