| /** |
| * 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.hadoop.yarn.conf; |
| |
| import org.apache.hadoop.classification.InterfaceAudience.Private; |
| import org.apache.hadoop.classification.InterfaceStability.Unstable; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.util.ReflectionUtils; |
| import org.apache.hadoop.yarn.exceptions.YarnRuntimeException; |
| |
| @Private |
| @Unstable |
| /** |
| * Factory for {@link ConfigurationProvider} implementations. |
| */ |
| public class ConfigurationProviderFactory { |
| /** |
| * Creates an instance of {@link ConfigurationProvider} using given |
| * configuration. |
| * @param bootstrapConf |
| * @return configurationProvider |
| */ |
| @SuppressWarnings("unchecked") |
| public static ConfigurationProvider |
| getConfigurationProvider(Configuration bootstrapConf) { |
| Class<? extends ConfigurationProvider> defaultProviderClass; |
| try { |
| defaultProviderClass = (Class<? extends ConfigurationProvider>) |
| Class.forName( |
| YarnConfiguration.DEFAULT_RM_CONFIGURATION_PROVIDER_CLASS); |
| } catch (Exception e) { |
| throw new YarnRuntimeException( |
| "Invalid default configuration provider class" |
| + YarnConfiguration.DEFAULT_RM_CONFIGURATION_PROVIDER_CLASS, e); |
| } |
| ConfigurationProvider configurationProvider = |
| ReflectionUtils.newInstance(bootstrapConf.getClass( |
| YarnConfiguration.RM_CONFIGURATION_PROVIDER_CLASS, |
| defaultProviderClass, ConfigurationProvider.class), |
| bootstrapConf); |
| return configurationProvider; |
| } |
| } |