com.kk_electronic.kkportal.examples.modules.MotD.java Source code

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Here is the source code for com.kk_electronic.kkportal.examples.modules.MotD.java

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/*
 * Copyright 2010 kk-electronic a/s. 
 * 
 * This file is part of KKPortal.
 *
 * KKPortal is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * KKPortal is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with KKPortal.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package com.kk_electronic.kkportal.examples.modules;

import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Widget;
import com.google.inject.Inject;
import com.kk_electronic.kkportal.core.AbstractModule;
import com.kk_electronic.kkportal.core.services.MotDService;
import com.kk_electronic.kkportal.core.util.Callback;

/**
 * Message of the Day module,
 * displaying what the current message of the day is <p> 
 * 
 * using the {@link MotDService}
 * 
 * @author Jes Andersen
 *
 */
public class MotD extends AbstractModule implements Callback<String> {
    HTML widget = new HTML("Fetching MotD");

    @Override
    public Widget asWidget() {
        return widget;
    }

    @Inject
    public MotD(MotDService service) {
        /*
         *  Uses the call method in AbstractModule to 
         *   convert a Callback to a Asynccallback for the service.
        /**/
        service.getMessageOfTheDay(call(this));
    }

    @Override
    public void onSuccess(String result) {
        if (result != null) {
            SafeHtmlBuilder sb = new SafeHtmlBuilder();
            sb.appendEscapedLines(result);
            widget.setHTML(sb.toSafeHtml());
        } else {
            widget.setHTML("No message of the day");
        }
    }
}