Java tutorial
/* * 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.knowledgecode.cordova.websocket; import java.nio.charset.Charset; import org.apache.cordova.CallbackContext; import org.apache.cordova.PluginResult; import org.apache.cordova.PluginResult.Status; class WebSocketGenerator implements org.eclipse.jetty.websocket.WebSocket.OnTextMessage, org.eclipse.jetty.websocket.WebSocket.OnBinaryMessage { interface OnOpenListener { public void onOpen(int id, Connection conn); } interface OnCloseListener { public void onClose(int id); } private final int _id; private final CallbackContext _ctx; private final Charset _iso88591; private OnOpenListener _openListener; private OnCloseListener _closeListener; /** * Constructor * * @param id * @param ctx */ public WebSocketGenerator(int id, CallbackContext ctx) { _id = id; _ctx = ctx; _iso88591 = Charset.forName("ISO-8859-1"); _openListener = new OnOpenListener() { @Override public void onOpen(int id, Connection conn) { // NOP } }; _closeListener = new OnCloseListener() { @Override public void onClose(int id) { // NOP } }; } /** * Set OnOpen listener. * * @param l */ public void setOnOpenListener(OnOpenListener l) { _openListener = l; } /** * Set OnClose listener. * * @param l */ public void setOnCloseListener(OnCloseListener l) { _closeListener = l; } @Override public void onOpen(Connection conn) { _openListener.onOpen(_id, conn); String protocol = conn.getProtocol(); protocol = protocol == null ? "" : protocol; sendCallback("O" + protocol, true); } @Override public void onMessage(String data) { sendCallback("T" + data, true); } @Override public void onMessage(byte[] data, int offset, int length) { sendCallback("B" + new String(data, _iso88591), true); } @Override public void onClose(int code, String reason) { _closeListener.onClose(_id); String wasClean = code == 1000 ? "1" : "0"; reason = reason == null ? "" : reason; sendCallback(String.format("C%s%4d%s", wasClean, code, reason), false); } /** * Send plugin result. * * @param callbackString * @param keepCallback */ private void sendCallback(String callbackString, boolean keepCallback) { if (!_ctx.isFinished()) { PluginResult result = new PluginResult(Status.OK, callbackString); result.setKeepCallback(keepCallback); _ctx.sendPluginResult(result); } } }