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AmbariServerConfiguration.java
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AmbariServerConfiguration.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.ambari.server.configuration;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* AmbariServerConfiguration is an abstract class to be extended by Ambari server configuration classes
* that encapsulate difference configuration categories such as 'ldap-configuration' and 'sso-configuration'.
*
* @see AmbariServerConfigurationCategory
* @see AmbariServerConfigurationKey
*/
public abstract class AmbariServerConfiguration {
private static final Logger LOGGER = LoggerFactory.getLogger(AmbariServerConfiguration.class);
/**
* Gets the configuration value for given {@link AmbariServerConfigurationKey}.
* <p>
* If no value is found in the supplied configuration map, the default value will be returned.
*
* @param ambariServerConfigurationKey the {@link AmbariServerConfigurationKey} for which to retrieve a value
* @param configurationMap a map of configuration property names to values
* @return the requested configuration value
*/
protected String getValue(AmbariServerConfigurationKey ambariServerConfigurationKey, Map<String, String> configurationMap) {
return getValue(ambariServerConfigurationKey.key(), configurationMap, ambariServerConfigurationKey.getDefaultValue());
}
/**
* Gets the configuration value for given {@link AmbariServerConfigurationKey}.
* <p>
* If no value is found in the supplied configuration map, the default value will be returned.
*
* @param propertyName the property name for which to retrieve a value
* @param configurationMap a map of configuration property names to values
* @param defaultValue the default value to use in the event the propery was not set in the configuration map
* @return the requested configuration value
*/
protected String getValue(String propertyName, Map<String, String> configurationMap, String defaultValue) {
if ((configurationMap != null) && configurationMap.containsKey(propertyName)) {
return configurationMap.get(propertyName);
} else {
LOGGER.debug("Ambari server configuration property [{}] hasn't been set; using default value", propertyName);
return defaultValue;
}
}
}