Java tutorial
/** * This code is part of the Harmony System implemented in Work Package 1 * of the Phosphorus project. This work is supported by the European * Comission under the Sixth Framework Programme with contract number * IST-034115. * * Copyright (C) 2006-2009 Phosphorus WP1 partners. Phosphorus Consortium. * http://ist-phosphorus.eu/ * * This 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 2.1 of * the License, or (at your option) any later version. * * This software 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 this software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ /** * */ package client.tools.page; import client.helper.RpcRequest; import client.template.dialog.ErrorDialog; import client.template.dialog.InfoDialog; import com.google.gwt.user.client.rpc.AsyncCallback; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.ClickListener; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.TextBox; import com.google.gwt.user.client.ui.VerticalPanel; import com.google.gwt.user.client.ui.Widget; /** * @author gassen */ public class NameResolverPage extends Composite implements ClickListener, AsyncCallback { private final TextBox query; private final Button button; /** * */ public NameResolverPage() { this.query = new TextBox(); this.button = new Button("Resolve"); this.button.addClickListener(this); final VerticalPanel panel = new VerticalPanel(); panel.add(new HTML("Please enter hostname")); panel.add(this.query); panel.add(this.button); this.initWidget(panel); } /* * (non-Javadoc) * * @see * com.google.gwt.user.client.ui.ClickListener#onClick(com.google.gwt.user * .client.ui.Widget) */ public void onClick(final Widget sender) { RpcRequest.common().resolveName(this.query.getText(), this); } /* * (non-Javadoc) * * @see * com.google.gwt.user.client.rpc.AsyncCallback#onFailure(java.lang.Throwable * ) */ public void onFailure(final Throwable caught) { final ErrorDialog dialog = new ErrorDialog("Failure", caught); dialog.show(); dialog.center(); } /* * (non-Javadoc) * * @see * com.google.gwt.user.client.rpc.AsyncCallback#onSuccess(java.lang.Object) */ public void onSuccess(final Object result) { final String ip = (String) result; final HTML text = new HTML( ("".equals(ip)) ? "No TNA found for " + this.query.getText() : this.query.getText() + ": " + ip); final InfoDialog dialog = new InfoDialog("TNA Lookup", text); dialog.show(); dialog.center(); } }