| /* |
| * 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.drill.exec.server.rest; |
| |
| import io.netty.channel.ChannelPromise; |
| import org.apache.drill.common.AutoCloseables; |
| import org.apache.drill.exec.memory.BufferAllocator; |
| import org.apache.drill.exec.rpc.ChannelClosedException; |
| import org.apache.drill.exec.rpc.user.UserSession; |
| |
| import java.net.SocketAddress; |
| |
| /** |
| * Class holding all the resources required for Web User Session. This class is responsible for the proper cleanup of |
| * all the resources. |
| */ |
| public class WebSessionResources implements AutoCloseable { |
| |
| private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(WebSessionResources.class); |
| |
| private BufferAllocator allocator; |
| |
| private final SocketAddress remoteAddress; |
| |
| private UserSession webUserSession; |
| |
| private ChannelPromise closeFuture; |
| |
| WebSessionResources(BufferAllocator allocator, SocketAddress remoteAddress, |
| UserSession userSession, ChannelPromise closeFuture) { |
| this.allocator = allocator; |
| this.remoteAddress = remoteAddress; |
| this.webUserSession = userSession; |
| this.closeFuture = closeFuture; |
| } |
| |
| public UserSession getSession() { |
| return webUserSession; |
| } |
| |
| public BufferAllocator getAllocator() { |
| return allocator; |
| } |
| |
| public ChannelPromise getCloseFuture() { |
| return closeFuture; |
| } |
| |
| public SocketAddress getRemoteAddress() { |
| return remoteAddress; |
| } |
| |
| @Override |
| public void close() { |
| try { |
| AutoCloseables.close(webUserSession, allocator); |
| } catch (Exception ex) { |
| logger.error("Failure while closing the session resources", ex); |
| } |
| |
| // Notify all the listeners of this closeFuture for failure events so that listeners can do cleanup related to this |
| // WebSession. This will be called after every query execution by AnonymousWebUserConnection::cleanupSession and |
| // for authenticated user it is called when session is invalidated. |
| // For authenticated user it will cancel the in-flight queries based on session invalidation. Whereas for |
| // unauthenticated user it's a no-op since there is no session associated with it. We don't have mechanism currently |
| // to call this close future upon Http connection close. |
| if (closeFuture != null) { |
| closeFuture.setFailure(new ChannelClosedException("Http connection is closed by Web Client")); |
| closeFuture = null; |
| } |
| } |
| } |