org.cruxframework.crux.tools.codeserver.client.CodeServerNotifier.java Source code

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Here is the source code for org.cruxframework.crux.tools.codeserver.client.CodeServerNotifier.java

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/*
 * Copyright 2014 cruxframework.org.
 * 
 * Licensed 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.cruxframework.crux.tools.codeserver.client;

import java.util.logging.Level;
import java.util.logging.Logger;

import org.cruxframework.crux.core.client.Crux;
import org.cruxframework.crux.core.client.screen.Screen;
import org.cruxframework.crux.core.client.utils.StringUtils;
import org.cruxframework.crux.core.client.websocket.SocketCloseEvent;
import org.cruxframework.crux.core.client.websocket.SocketCloseHandler;
import org.cruxframework.crux.core.client.websocket.SocketErrorEvent;
import org.cruxframework.crux.core.client.websocket.SocketErrorHandler;
import org.cruxframework.crux.core.client.websocket.SocketMessageEvent;
import org.cruxframework.crux.core.client.websocket.SocketMessageHandler;
import org.cruxframework.crux.core.client.websocket.SocketOpenEvent;
import org.cruxframework.crux.core.client.websocket.SocketOpenHandler;
import org.cruxframework.crux.core.client.websocket.WebSocket;
import org.cruxframework.crux.tools.codeserver.client.common.CodeServerResources;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.JsonUtils;
import com.google.gwt.logging.client.LogConfiguration;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.Label;

/**
 * @author Thiago da Rosa de Bustamante
 *
 */
public class CodeServerNotifier implements EntryPoint {
    private static final String DEFAULT_MESSAGE_COMPILING = "Compiling module...";
    private static Logger logger = Logger.getLogger(CodeServerNotifier.class.getName());

    private DialogBox dialogBox;
    private Label label;

    @Override
    public void onModuleLoad() {
        dialogBox = new DialogBox();
        dialogBox.setStyleName(CodeServerResources.INSTANCE.css().cruxCodeServerNotifier());
        CodeServerResources.INSTANCE.css().ensureInjected();

        label = new Label();
        label.setText(DEFAULT_MESSAGE_COMPILING);

        dialogBox.add(label);
        //The application can be running as a gadget so the server is not necessarily the url address itself.
        String notifierAddress = Window.Location.getHostName();
        if (!StringUtils.isEmpty(Crux.getConfig().notifierCompilerAddress())) {
            notifierAddress = Crux.getConfig().notifierCompilerAddress();
        }
        //CHECKSTYLE:OFF
        final String url = "ws://" + notifierAddress + ":" + Crux.getConfig().notifierCompilerPort();
        //CHECKSTYLE:ON

        final WebSocket SOCKET = WebSocket.createIfSupported(url);

        if (SOCKET == null) {
            logger.info("Browser do not support Websocket.");
            return;
        }

        addHandlers(SOCKET);
    }

    private void addHandlers(final WebSocket socket) {
        socket.addCloseHandler(new SocketCloseHandler() {
            @Override
            public void onClose(SocketCloseEvent event) {
                logger.info("Compilation Notifier Socket was closed. Trying to reconnect...");
                socket.reconnect();
            }
        });

        socket.addOpenHandler(new SocketOpenHandler() {
            @Override
            public void onOpen(SocketOpenEvent event) {
                if (LogConfiguration.loggingIsEnabled()) {
                    logger.log(Level.INFO, "Connected to Compilation Notifier service.");
                }
            }
        });
        socket.addErrorHandler(new SocketErrorHandler() {
            @Override
            public void onError(SocketErrorEvent event) {
                if (LogConfiguration.loggingIsEnabled()) {
                    logger.log(Level.INFO, "Unexpected error on Compilation Notifier service socket.");
                }
            }
        });

        socket.addMessageHandler(new SocketMessageHandler() {
            @Override
            public void onMessage(SocketMessageEvent event) {
                try {
                    String message = event.getMessage();
                    CompilationMessage compilationMessage = JsonUtils.safeEval(message);

                    switch (compilationMessage.getOperation()) {
                    case START:
                        Screen.blockToUser();
                        logger.log(Level.INFO, "Module: " + compilationMessage.getModule());
                        dialogBox.show();
                        break;

                    case END:
                        Screen.unblockToUser();
                        dialogBox.hide();
                        if (compilationMessage.getStatus()) {
                            Window.Location.reload();
                        } else {
                            Crux.getErrorHandler()
                                    .handleError("Error compiling module " + compilationMessage.getModule() + ".");
                        }
                        break;
                    }
                } catch (Exception e) {
                    Crux.getErrorHandler().handleError("Error parsing message from Compilation Notifier service",
                            e);
                }
            }
        });
    }
}