com.risevision.viewer.client.data.ViewerDataProvider.java Source code

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Here is the source code for com.risevision.viewer.client.data.ViewerDataProvider.java

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// Copyright  2010 - May 2014 Rise Vision Incorporated.
// Use of this software is governed by the GPLv3 license
// (reproduced in the LICENSE file).

package com.risevision.viewer.client.data;

import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.client.JsArrayString;
import com.google.gwt.http.client.URL;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.Window;
import com.risevision.common.client.utils.RiseUtils;
import com.risevision.viewer.client.ViewerEntryPoint;
import com.risevision.viewer.client.channel.ChannelConnectionController;
import com.risevision.viewer.client.info.Global;
import com.risevision.viewer.client.info.NotificationType;
import com.risevision.viewer.client.utils.ViewerHtmlUtils;
import com.risevision.viewer.client.widgets.ViewerNotificationsPanel;

public class ViewerDataProvider {
    private static final int IDLE_STATE = 0;
    private static final int ACTIVE_STATE = 1;
    private static final int WAITING_STATE = 2;
    private static final int CONTENT_STATE = 3;

    private static int state = IDLE_STATE;

    public enum Reason {
        RETRIEVAL_TIMEOUT, UPDATE_MESSAGE_RECEIVED, VIEWER_INIT, POLLING_TIMER, NO_CACHE, AFTER_CACHE, PREVIEW
    }

    private static Timer apiTimer = new Timer() {
        @Override
        public void run() {
            if (state == WAITING_STATE) {
                if (!ViewerDataController.hasData()) {
                    ViewerNotificationsPanel.getInstance().show(NotificationType.server_connection_failed);
                }

                state = CONTENT_STATE;
            }

            // signifies last attempt to call the Viewer API failed, so we will inform the user of it.
            if (/* ViewerEntryPoint.isDisplay() && */ state == CONTENT_STATE) {
                //            if (ViewerEntryPoint.isDisplay()) {
                //               reportDataReady(getLocalStorageData(), true);
                //            }

                state = IDLE_STATE;

                retrieveData(Reason.RETRIEVAL_TIMEOUT.toString());
            } else {
                state = IDLE_STATE;
            }
        }
    };

    public static void retrieveData(String reason) {
        if (state == IDLE_STATE) {
            // [AD] moved this function to after the data is retrieved - workaround for Core bug 
            // where the Viewer API and Channel Token calls can't be made at the same time 
            //         channelController.init(channelCommand);

            String url;

            url = Global.DATA_SERVER_URL.replace("{0}", ViewerEntryPoint.getType());
            url = url.replace("{1}", ViewerEntryPoint.getId());

            int viewerWidth = Window.getClientWidth();
            int viewerHeight = Window.getClientHeight();

            String sysInfo = ViewerEntryPoint.getSysInfo();
            JsArrayString browserInfo = ViewerHtmlUtils.getBrowserVersion();

            String updateTicket = ChannelConnectionController.getUpdateTicket();
            updateTicket = updateTicket == null ? "" : "&ticket=" + updateTicket;

            String fullUrl = url + "?sig=" + ViewerDataController.getSig() + updateTicket + "&"
                    + Global.VIEWER_URL_IDENTIFIER
                    + (RiseUtils.strIsNullOrEmpty(sysInfo) ? "" : "&" + URL.decodeQueryString(sysInfo)) + "&cn="
                    + browserInfo.get(0) + "&cv=" + browserInfo.get(1) + "&width=" + viewerWidth + "&height="
                    + viewerHeight + "&callback=?";

            state = WAITING_STATE;

            // start 60 second timer for timeout of data retrieval
            apiTimer.schedule(ViewerDataController.MINUTE_UPDATE_INTERVAL);
            ViewerHtmlUtils.logExternalMessage("viewer data retrieval", reason);
            getDataNative(fullUrl);
        } else {
            state = CONTENT_STATE;
        }
    }

    private static void reportDataReady(JavaScriptObject jso) {
        state = ACTIVE_STATE;
        ChannelConnectionController.init(ViewerDataController.channelCommand);
        ViewerDataController.reportDataReady(jso);
    }

    private static native void getDataNative(String url) /*-{
                                                         //      $wnd.startJSONCall(url);
                                                             
                                                         try {
                                                         $wnd.writeToLog("Retrieving Viewer Data");
                                                             
                                                         $wnd.jQuery.getJSON(url, function(result) {
                                                         try { 
                                                         if (url.indexOf("display") != -1 && $wnd.supportsHtml5Storage()) {
                                                         if (result && result.content) {
                                                         var idMatch = /display\/([0-9A-Za-z-]+)/.exec(url);
                                                         if (idMatch && result.display) {
                                                         result.display.id = idMatch[1];
                                                         $wnd.storeViewerResponse(result);
                                                         }
                                                         }
                                                         }
                                                             
                                                         $wnd.writeToLog("Viewer Data - Status Message - " + result.status.message);
                                                             
                                                         @com.risevision.viewer.client.data.ViewerDataProvider::reportDataReady(Lcom/google/gwt/core/client/JavaScriptObject;)(result);
                                                         }
                                                         catch (err) {
                                                         $wnd.writeToLog("Error Parsing Viewer Data - " + result + " - " + err.message);
                                                         @com.risevision.viewer.client.utils.ViewerHtmlUtils::logExternalMessage(Ljava/lang/String;Ljava/lang/String;)("viewer data parse error", result + " - " + err.message);
                                                         }
                                                         }, "json");
                                                         }
                                                         catch (err) {
                                                         $wnd.writeToLog("Error Retrieving Viewer Data - " + url + " - " + err.message);
                                                         @com.risevision.viewer.client.utils.ViewerHtmlUtils::logExternalMessage(Ljava/lang/String;Ljava/lang/String;)("viewer data retrieval error", url + " - " + err.message);
                                                         }
                                                         }-*/;

}