| /** |
| * 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 com.datatorrent.lib.io; |
| |
| import javax.servlet.http.HttpServletRequest; |
| import javax.validation.constraints.Min; |
| import javax.validation.constraints.NotNull; |
| |
| import org.eclipse.jetty.server.Server; |
| import org.eclipse.jetty.servlet.ServletContextHandler; |
| import org.eclipse.jetty.servlet.ServletHolder; |
| import org.eclipse.jetty.websocket.WebSocket; |
| import org.eclipse.jetty.websocket.WebSocketServlet; |
| |
| import com.datatorrent.api.Context.OperatorContext; |
| import com.datatorrent.api.InputOperator; |
| import com.datatorrent.netlet.util.DTThrowable; |
| |
| @org.apache.hadoop.classification.InterfaceStability.Evolving |
| /** |
| * @since 3.3.0 |
| */ |
| public abstract class WebSocketServerInputOperator implements InputOperator |
| { |
| public static final String DEFAULT_EXTENSION = "/in"; |
| |
| @Min(1) |
| private int port; |
| @NotNull |
| private String extension = DEFAULT_EXTENSION; |
| |
| private transient Server server; |
| |
| public WebSocketServerInputOperator() |
| { |
| } |
| |
| @Override |
| public void emitTuples() |
| { |
| } |
| |
| @Override |
| public void beginWindow(long windowId) |
| { |
| } |
| |
| @Override |
| public void endWindow() |
| { |
| } |
| |
| @Override |
| public void setup(OperatorContext context) |
| { |
| server = new Server(port); |
| DefaultWebSocketServlet servlet = new DefaultWebSocketServlet(); |
| ServletHolder sh = new ServletHolder(servlet); |
| ServletContextHandler contextHandler = new ServletContextHandler(server, "/", ServletContextHandler.SESSIONS); |
| contextHandler.addServlet(sh, extension); |
| |
| try { |
| server.start(); |
| } catch (Exception ex) { |
| DTThrowable.rethrow(ex); |
| } |
| } |
| |
| @Override |
| public void teardown() |
| { |
| try { |
| server.stop(); |
| } catch (Exception ex) { |
| DTThrowable.rethrow(ex); |
| } |
| } |
| |
| /** |
| * @return the port |
| * @since 3.0.0 |
| */ |
| public int getPort() |
| { |
| return port; |
| } |
| |
| /** |
| * @param port the port to set |
| */ |
| public void setPort(int port) |
| { |
| this.port = port; |
| } |
| |
| /** |
| * @return the extension |
| */ |
| public String getExtension() |
| { |
| return extension; |
| } |
| |
| /** |
| * @param extension the extension to set |
| */ |
| public void setExtension(String extension) |
| { |
| this.extension = extension; |
| } |
| |
| public abstract void processMessage(String data); |
| |
| private class DefaultWebSocketServlet extends WebSocketServlet |
| { |
| private static final long serialVersionUID = 201503061010L; |
| |
| @Override |
| public WebSocket doWebSocketConnect(HttpServletRequest request, String protocol) |
| { |
| return new DataSinkWebSocket(); |
| } |
| } |
| |
| private class DataSinkWebSocket implements WebSocket.OnTextMessage |
| { |
| public DataSinkWebSocket() |
| { |
| } |
| |
| @Override |
| public void onMessage(String data) |
| { |
| processMessage(data); |
| } |
| |
| @Override |
| public void onOpen(Connection connection) |
| { |
| } |
| |
| @Override |
| public void onClose(int closeCode, String message) |
| { |
| } |
| } |
| } |