/* * 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.flink.runtime.security.contexts; import org.apache.flink.runtime.security.SecurityConfiguration; import org.apache.flink.runtime.security.SecurityContextInitializeException; import org.apache.flink.runtime.security.modules.HadoopModuleFactory; import org.apache.hadoop.security.UserGroupInformation; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Default security context factory that instantiates {@link SecurityContext} * based on installed modules, it would instantiate {@link HadoopSecurityContext} if * a {@link HadoopModuleFactory} is included. */ public class HadoopSecurityContextFactory implements SecurityContextFactory { private static final Logger LOG = LoggerFactory.getLogger(HadoopSecurityContextFactory.class); @Override public boolean isCompatibleWith(SecurityConfiguration securityConfig) { // not compatible if no hadoop module factory configured. if (!securityConfig.getSecurityModuleFactories().contains(HadoopModuleFactory.class.getCanonicalName())) { return false; } // not compatible if Hadoop binary not in classpath. try { Class.forName( "org.apache.hadoop.security.UserGroupInformation", false, HadoopSecurityContextFactory.class.getClassLoader()); return true; } catch (ClassNotFoundException e) { LOG.info("Cannot install HadoopSecurityContext because Hadoop cannot be found in the Classpath."); return false; } } @Override public SecurityContext createContext(SecurityConfiguration securityConfig) throws SecurityContextInitializeException { try { UserGroupInformation loginUser = UserGroupInformation.getLoginUser(); return new HadoopSecurityContext(loginUser); } catch (Exception e) { LOG.error("Cannot instantiate HadoopSecurityContext.", e); throw new SecurityContextInitializeException("Cannot instantiate HadoopSecurityContext.", e); } } }