david-golightly-leapyear commented on a change in pull request #3151: URL: https://github.com/apache/zeppelin/pull/3151#discussion_r493868493
########## File path: zeppelin-server/src/main/java/org/apache/zeppelin/socket/ConnectionManager.java ########## @@ -0,0 +1,442 @@ +/* + * 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.zeppelin.socket; + + +import com.google.common.collect.Queues; +import com.google.common.collect.Sets; +import com.google.gson.Gson; +import com.google.gson.GsonBuilder; +import org.apache.commons.lang.StringUtils; +import org.apache.zeppelin.conf.ZeppelinConfiguration; +import org.apache.zeppelin.display.GUI; +import org.apache.zeppelin.display.Input; +import org.apache.zeppelin.notebook.Note; +import org.apache.zeppelin.notebook.NotebookAuthorization; +import org.apache.zeppelin.notebook.NotebookImportDeserializer; +import org.apache.zeppelin.notebook.Paragraph; +import org.apache.zeppelin.notebook.socket.Message; +import org.apache.zeppelin.notebook.socket.WatcherMessage; +import org.apache.zeppelin.user.AuthenticationInfo; +import org.apache.zeppelin.util.WatcherSecurityKey; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.Collections; +import java.util.Date; +import java.util.HashSet; +import java.util.LinkedList; +import java.util.List; +import java.util.Map; +import java.util.Queue; +import java.util.Set; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.ConcurrentLinkedQueue; + +/** + * Manager class for managing websocket connections + */ +public class ConnectionManager { + + private static final Logger LOGGER = LoggerFactory.getLogger(ConnectionManager.class); + private static Gson gson = new GsonBuilder() + .setDateFormat("yyyy-MM-dd'T'HH:mm:ssZ") + .registerTypeAdapter(Date.class, new NotebookImportDeserializer()) + .setPrettyPrinting() + .registerTypeAdapterFactory(Input.TypeAdapterFactory).create(); + + final Queue<NotebookSocket> connectedSockets = new ConcurrentLinkedQueue<>(); + // noteId -> connection + final Map<String, List<NotebookSocket>> noteSocketMap = new ConcurrentHashMap<>(); + // user -> connection + final Map<String, Queue<NotebookSocket>> userSocketMap = new ConcurrentHashMap<>(); + + /** + * This is a special endpoint in the notebook websoket, Every connection in this Queue + * will be able to watch every websocket event, it doesnt need to be listed into the map of + * noteSocketMap. This can be used to get information about websocket traffic and watch what + * is going on. + */ + final Queue<NotebookSocket> watcherSockets = Queues.newConcurrentLinkedQueue(); + + private HashSet<String> collaborativeModeList = new HashSet<>(); + private Boolean collaborativeModeEnable = ZeppelinConfiguration + .create() + .isZeppelinNotebookCollaborativeModeEnable(); + + + public void addConnection(NotebookSocket conn) { + connectedSockets.add(conn); + } + + public void removeConnection(NotebookSocket conn) { + connectedSockets.remove(conn); + } + + public void addNoteConnection(String noteId, NotebookSocket socket) { + LOGGER.debug("Add connection {} to note: {}", socket, noteId); + synchronized (noteSocketMap) { + // make sure a socket relates only an single note. + removeConnectionFromAllNote(socket); + List<NotebookSocket> socketList = noteSocketMap.get(noteId); + if (socketList == null) { + socketList = new LinkedList<>(); + noteSocketMap.put(noteId, socketList); + } + if (!socketList.contains(socket)) { + socketList.add(socket); + } + checkCollaborativeStatus(noteId, socketList); + } + } + + public void removeNoteConnection(String noteId) { + synchronized (noteSocketMap) { + noteSocketMap.remove(noteId); + } + } + + public void removeNoteConnection(String noteId, NotebookSocket socket) { + LOGGER.debug("Remove connection {} from note: {}", socket, noteId); + synchronized (noteSocketMap) { + List<NotebookSocket> socketList = noteSocketMap.get(noteId); + if (socketList != null) { + socketList.remove(socket); + } + checkCollaborativeStatus(noteId, socketList); + } + } + + public void addUserConnection(String user, NotebookSocket conn) { + LOGGER.debug("Add user connection {} for user: {}", conn, user); + conn.setUser(user); + if (userSocketMap.containsKey(user)) { + userSocketMap.get(user).add(conn); + } else { + Queue<NotebookSocket> socketQueue = new ConcurrentLinkedQueue<>(); + socketQueue.add(conn); + userSocketMap.put(user, socketQueue); + } + } + + public void removeUserConnection(String user, NotebookSocket conn) { + LOGGER.debug("Remove user connection {} for user: {}", conn, user); + if (userSocketMap.containsKey(user)) { + userSocketMap.get(user).remove(conn); + } else { + LOGGER.warn("Closing connection that is absent in user connections"); + } + } + + public String getAssociatedNoteId(NotebookSocket socket) { + String associatedNoteId = null; + synchronized (noteSocketMap) { + Set<String> noteIds = noteSocketMap.keySet(); + for (String noteId : noteIds) { + List<NotebookSocket> sockets = noteSocketMap.get(noteId); + if (sockets.contains(socket)) { + associatedNoteId = noteId; + } + } + } + + return associatedNoteId; + } + + public void removeConnectionFromAllNote(NotebookSocket socket) { + synchronized (noteSocketMap) { + Set<String> noteIds = noteSocketMap.keySet(); + for (String noteId : noteIds) { + removeConnectionFromNote(noteId, socket); + } + } + } + + private void removeConnectionFromNote(String noteId, NotebookSocket socket) { + LOGGER.debug("Remove connection {} from note: {}", socket, noteId); + synchronized (noteSocketMap) { + List<NotebookSocket> socketList = noteSocketMap.get(noteId); + if (socketList != null) { + socketList.remove(socket); + } + checkCollaborativeStatus(noteId, socketList); + } + } + + private void checkCollaborativeStatus(String noteId, List<NotebookSocket> socketList) { + if (!collaborativeModeEnable) { + return; + } + boolean collaborativeStatusNew = socketList.size() > 1; + if (collaborativeStatusNew) { + collaborativeModeList.add(noteId); + } else { + collaborativeModeList.remove(noteId); + } + + Message message = new Message(Message.OP.COLLABORATIVE_MODE_STATUS); + message.put("status", collaborativeStatusNew); + if (collaborativeStatusNew) { + HashSet<String> userList = new HashSet<>(); + for (NotebookSocket noteSocket : socketList) { + userList.add(noteSocket.getUser()); + } + message.put("users", userList); + } + broadcast(noteId, message); + } + + + protected String serializeMessage(Message m) { + return gson.toJson(m); + } + + public void broadcast(Message m) { + synchronized (connectedSockets) { + for (NotebookSocket ns : connectedSockets) { + try { + ns.send(serializeMessage(m)); + } catch (IOException e) { + LOGGER.error("Send error: " + m, e); + } + } + } + } + + public void broadcast(String noteId, Message m) { + List<NotebookSocket> socketsToBroadcast = Collections.emptyList(); + synchronized (noteSocketMap) { + broadcastToWatchers(noteId, StringUtils.EMPTY, m); + List<NotebookSocket> socketLists = noteSocketMap.get(noteId); + if (socketLists == null || socketLists.size() == 0) { + return; + } + socketsToBroadcast = new ArrayList<>(socketLists); + } + LOGGER.debug("SEND >> " + m); + for (NotebookSocket conn : socketsToBroadcast) { + try { + conn.send(serializeMessage(m)); + } catch (IOException e) { + LOGGER.error("socket error", e); + } + } + } + + private void broadcastToWatchers(String noteId, String subject, Message message) { + synchronized (watcherSockets) { + for (NotebookSocket watcher : watcherSockets) { + try { + watcher.send( + WatcherMessage.builder(noteId).subject(subject).message(serializeMessage(message)) + .build().toJson()); + } catch (IOException e) { + LOGGER.error("Cannot broadcast message to watcher", e); + } + } + } + } + + public void broadcastExcept(String noteId, Message m, NotebookSocket exclude) { + List<NotebookSocket> socketsToBroadcast = Collections.emptyList(); + synchronized (noteSocketMap) { + broadcastToWatchers(noteId, StringUtils.EMPTY, m); + List<NotebookSocket> socketLists = noteSocketMap.get(noteId); + if (socketLists == null || socketLists.size() == 0) { + return; + } + socketsToBroadcast = new ArrayList<>(socketLists); + } + + LOGGER.debug("SEND >> " + m); + for (NotebookSocket conn : socketsToBroadcast) { + if (exclude.equals(conn)) { + continue; + } + try { + conn.send(serializeMessage(m)); + } catch (IOException e) { + LOGGER.error("socket error", e); + } + } + } + + /** + * Send websocket message to all connections regardless of notebook id. + */ + public void broadcastToAllConnections(String serialized) { + broadcastToAllConnectionsExcept(null, serialized); + } + + public void broadcastToAllConnectionsExcept(NotebookSocket exclude, String serializedMsg) { + synchronized (connectedSockets) { + for (NotebookSocket conn : connectedSockets) { + if (exclude != null && exclude.equals(conn)) { + continue; + } + + try { + conn.send(serializedMsg); + } catch (IOException e) { + LOGGER.error("Cannot broadcast message to conn", e); + } + } + } + } + + public Set<String> getConnectedUsers() { + Set<String> connectedUsers = Sets.newHashSet(); + for (NotebookSocket notebookSocket : connectedSockets) { + connectedUsers.add(notebookSocket.getUser()); + } + return connectedUsers; + } + + + public void multicastToUser(String user, Message m) { + if (!userSocketMap.containsKey(user)) { + LOGGER.warn("Multicasting to user {} that is not in connections map", user); + return; + } + + for (NotebookSocket conn : userSocketMap.get(user)) { + unicast(m, conn); + } + } + + public void unicast(Message m, NotebookSocket conn) { + try { + conn.send(serializeMessage(m)); + } catch (IOException e) { + LOGGER.error("socket error", e); + } + broadcastToWatchers(StringUtils.EMPTY, StringUtils.EMPTY, m); + } + + public void unicastParagraph(Note note, Paragraph p, String user) { + if (!note.isPersonalizedMode() || p == null || user == null) { + return; + } + + if (!userSocketMap.containsKey(user)) { + LOGGER.warn("Failed to send unicast. user {} that is not in connections map", user); + return; + } + + for (NotebookSocket conn : userSocketMap.get(user)) { + Message m = new Message(Message.OP.PARAGRAPH).put("paragraph", p); + unicast(m, conn); + } + } + + public void broadcastNoteListExcept(List<Map<String, String>> notesInfo, + AuthenticationInfo subject) { + Set<String> userAndRoles; + NotebookAuthorization authInfo = NotebookAuthorization.getInstance(); + for (String user : userSocketMap.keySet()) { + if (subject.getUser().equals(user)) { + continue; + } + //reloaded already above; parameter - false + userAndRoles = authInfo.getRoles(user); + userAndRoles.add(user); + // TODO(zjffdu) is it ok for comment the following line ? + // notesInfo = generateNotesInfo(false, new AuthenticationInfo(user), userAndRoles); Review comment: This is the cause of https://issues.apache.org/jira/browse/ZEPPELIN-5061 and needs to be reverted ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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