| /* |
| * Copyright The Apache Software Foundation |
| * |
| * 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.hbase.ipc; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.hbase.security.User; |
| |
| import com.google.protobuf.BlockingService; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.cloudera.htrace.Trace; |
| |
| import java.net.InetAddress; |
| |
| /** |
| * Represents client information (authenticated username, remote address, protocol) |
| * for the currently executing request within a RPC server handler thread. If |
| * called outside the context of a RPC request, all values will be |
| * <code>null</code>. |
| */ |
| @InterfaceAudience.Private |
| public class RequestContext { |
| private static ThreadLocal<RequestContext> instance = |
| new ThreadLocal<RequestContext>() { |
| protected RequestContext initialValue() { |
| return new RequestContext(null, null, null); |
| } |
| }; |
| |
| public static RequestContext get() { |
| return instance.get(); |
| } |
| |
| |
| /** |
| * Returns the user credentials associated with the current RPC request or |
| * <code>null</code> if no credentials were provided. |
| * @return A User |
| */ |
| public static User getRequestUser() { |
| RequestContext ctx = instance.get(); |
| if (ctx != null) { |
| return ctx.getUser(); |
| } |
| return null; |
| } |
| |
| /** |
| * Returns the username for any user associated with the current RPC |
| * request or <code>null</code> if no user is set. |
| */ |
| public static String getRequestUserName() { |
| User user = getRequestUser(); |
| if (user != null) { |
| return user.getShortName(); |
| } |
| return null; |
| } |
| |
| /** |
| * Indicates whether or not the current thread is within scope of executing |
| * an RPC request. |
| */ |
| public static boolean isInRequestContext() { |
| RequestContext ctx = instance.get(); |
| if (ctx != null) { |
| return ctx.isInRequest(); |
| } |
| return false; |
| } |
| |
| /** |
| * Initializes the client credentials for the current request. |
| * @param user |
| * @param remoteAddress |
| * @param service |
| */ |
| public static void set(User user, |
| InetAddress remoteAddress, BlockingService service) { |
| RequestContext ctx = instance.get(); |
| ctx.user = user; |
| ctx.remoteAddress = remoteAddress; |
| ctx.service = service; |
| ctx.inRequest = true; |
| if (Trace.isTracing()) { |
| if (user != null) { |
| Trace.currentSpan().addKVAnnotation(Bytes.toBytes("user"), Bytes.toBytes(user.getName())); |
| } |
| if (remoteAddress != null) { |
| Trace.currentSpan().addKVAnnotation( |
| Bytes.toBytes("remoteAddress"), |
| Bytes.toBytes(remoteAddress.getHostAddress())); |
| } |
| } |
| } |
| |
| /** |
| * Clears out the client credentials for a given request. |
| */ |
| public static void clear() { |
| RequestContext ctx = instance.get(); |
| ctx.user = null; |
| ctx.remoteAddress = null; |
| ctx.service = null; |
| ctx.inRequest = false; |
| } |
| |
| private User user; |
| private InetAddress remoteAddress; |
| private BlockingService service; |
| // indicates we're within a RPC request invocation |
| private boolean inRequest; |
| |
| private RequestContext(User user, InetAddress remoteAddr, BlockingService service) { |
| this.user = user; |
| this.remoteAddress = remoteAddr; |
| this.service = service; |
| } |
| |
| public User getUser() { |
| return user; |
| } |
| |
| public InetAddress getRemoteAddress() { |
| return remoteAddress; |
| } |
| |
| public BlockingService getService() { |
| return this.service; |
| } |
| |
| public boolean isInRequest() { |
| return inRequest; |
| } |
| } |