Java tutorial
/** * 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.oozie.action.hadoop; import org.apache.hadoop.security.UserGroupInformation; import org.apache.oozie.test.XFsTestCase; import java.security.PrivilegedExceptionAction; import java.util.concurrent.Callable; public abstract class MainTestCase extends XFsTestCase implements Callable<Void> { public static void execute(String user, final Callable<Void> callable) throws Exception { UserGroupInformation ugi = UserGroupInformation.createProxyUser(user, UserGroupInformation.getLoginUser()); ugi.doAs(new PrivilegedExceptionAction<Void>() { public Void run() throws Exception { callable.call(); return null; } }); } public void testMain() throws Exception { execute(getTestUser(), this); } }