| /* |
| * 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.slider.core.registry; |
| |
| import com.google.common.base.Preconditions; |
| import org.apache.hadoop.registry.client.binding.RegistryUtils; |
| import org.apache.slider.common.SliderKeys; |
| |
| /** |
| * Miscellaneous methods to assist slider registry work |
| * |
| */ |
| public class SliderRegistryUtils { |
| |
| |
| /** |
| * Get the registry path for an instance under the user's home node |
| * @param instanceName application instance |
| * @return a path to the registry location for this application instance. |
| */ |
| public static String registryPathForInstance(String instanceName) { |
| return RegistryUtils.servicePath( |
| RegistryUtils.currentUser(), SliderKeys.APP_TYPE, instanceName |
| ); |
| } |
| |
| /** |
| * Process a path expanding it if needed. |
| * Validation is delegated to later as the core registry will need |
| * to do that anyway |
| * @param path path |
| * @return a path maybe with some expansion |
| */ |
| public static String resolvePath(String path) { |
| Preconditions.checkArgument(path!=null, "null path"); |
| Preconditions.checkArgument(!path.isEmpty(), "empty path"); |
| String newpath = path; |
| if (path.startsWith("~/")) { |
| // add user expansion |
| newpath = RegistryUtils.homePathForCurrentUser() + path.substring(1); |
| } else if (path.equals("~")) { |
| newpath = RegistryUtils.homePathForCurrentUser(); |
| } |
| return newpath; |
| } |
| } |