| /** |
| * 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.mapred.gridmix; |
| |
| import java.io.IOException; |
| import java.net.URI; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| /** |
| * Maps users in the trace to a set of valid target users on the test cluster. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public interface UserResolver { |
| |
| /** |
| * Configure the user map given the URI and configuration. The resolver's |
| * contract will define how the resource will be interpreted, but the default |
| * will typically interpret the URI as a {@link org.apache.hadoop.fs.Path} |
| * listing target users. |
| * This method should be called only if {@link #needsTargetUsersList()} |
| * returns true. |
| * @param userdesc URI from which user information may be loaded per the |
| * subclass contract. |
| * @param conf The tool configuration. |
| * @return true if the resource provided was used in building the list of |
| * target users |
| */ |
| public boolean setTargetUsers(URI userdesc, Configuration conf) |
| throws IOException; |
| |
| /** |
| * Map the given UGI to another per the subclass contract. |
| * @param ugi User information from the trace. |
| */ |
| public UserGroupInformation getTargetUgi(UserGroupInformation ugi); |
| |
| /** |
| * Indicates whether this user resolver needs a list of target users to be |
| * provided. |
| * |
| * @return true if a list of target users is to be provided for this |
| * user resolver |
| */ |
| public boolean needsTargetUsersList(); |
| |
| } |