Java tutorial
/******************************************************************************* * Copyright (c) 2011, 2016 Eurotech and/or its affiliates * * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Eurotech *******************************************************************************/ package org.eclipse.kura.web.client.ui.Device; import org.eclipse.kura.web.client.messages.Messages; import org.eclipse.kura.web.client.ui.EntryClassUi; import org.eclipse.kura.web.client.util.FailureHandler; import org.eclipse.kura.web.shared.GwtKuraErrorCode; import org.eclipse.kura.web.shared.model.GwtSession; import org.eclipse.kura.web.shared.model.GwtXSRFToken; import org.eclipse.kura.web.shared.service.GwtDeviceService; import org.eclipse.kura.web.shared.service.GwtDeviceServiceAsync; import org.eclipse.kura.web.shared.service.GwtSecurityTokenService; import org.eclipse.kura.web.shared.service.GwtSecurityTokenServiceAsync; import org.gwtbootstrap3.client.ui.Button; import org.gwtbootstrap3.client.ui.Input; import org.gwtbootstrap3.client.ui.PanelBody; import org.gwtbootstrap3.client.ui.TextBox; import com.google.gwt.core.client.GWT; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.dom.client.KeyCodes; import com.google.gwt.event.dom.client.KeyDownEvent; import com.google.gwt.event.dom.client.KeyDownHandler; import com.google.gwt.safehtml.shared.SafeHtmlBuilder; import com.google.gwt.uibinder.client.UiBinder; import com.google.gwt.uibinder.client.UiField; import com.google.gwt.user.client.rpc.AsyncCallback; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.FileUpload; import com.google.gwt.user.client.ui.FormPanel; import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.Hidden; import com.google.gwt.user.client.ui.Widget; public class CommandTabUi extends Composite { private static CommandTabUiUiBinder uiBinder = GWT.create(CommandTabUiUiBinder.class); private static final Messages MSGS = GWT.create(Messages.class); private static final String SERVLET_URL = "/" + GWT.getModuleName() + "/file/command"; @SuppressWarnings("unused") private GwtSession session; interface CommandTabUiUiBinder extends UiBinder<Widget, CommandTabUi> { } private final GwtSecurityTokenServiceAsync gwtXSRFService = GWT.create(GwtSecurityTokenService.class); private final GwtDeviceServiceAsync gwtDeviceService = GWT.create(GwtDeviceService.class); @UiField TextBox formExecute; @UiField Input formPassword; @UiField Button reset, execute; @UiField FormPanel commandForm; @UiField FileUpload docPath; @UiField PanelBody resultPanel; @UiField Hidden xsrfTokenField; String command, password; SafeHtmlBuilder safeHtml = new SafeHtmlBuilder(); public CommandTabUi() { initWidget(uiBinder.createAndBindUi(this)); this.formExecute.clear(); this.formExecute.setFocus(true); this.formExecute.setName("command"); this.formExecute.addKeyDownHandler(new KeyDownHandler() { @Override public void onKeyDown(KeyDownEvent event) { if (event.getNativeKeyCode() == KeyCodes.KEY_ENTER) { CommandTabUi.this.formPassword.setFocus(true); } } }); this.xsrfTokenField.setID("xsrfToken"); this.xsrfTokenField.setName("xsrfToken"); this.xsrfTokenField.setValue(""); this.formPassword.setText(null); this.formPassword.setName("password"); this.formPassword.addKeyDownHandler(new KeyDownHandler() { @Override public void onKeyDown(KeyDownEvent event) { if (event.getNativeKeyCode() == KeyCodes.KEY_ENTER) { CommandTabUi.this.execute.setFocus(true); } } }); this.docPath.setName("file"); display(MSGS.deviceCommandNoOutput()); this.reset.setText(MSGS.reset()); this.reset.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { CommandTabUi.this.commandForm.reset(); CommandTabUi.this.formExecute.setFocus(true); display(MSGS.deviceCommandNoOutput()); } }); this.execute.setText(MSGS.deviceCommandExecute()); this.execute.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { CommandTabUi.this.gwtXSRFService.generateSecurityToken(new AsyncCallback<GwtXSRFToken>() { @Override public void onFailure(Throwable ex) { FailureHandler.handle(ex); } @Override public void onSuccess(GwtXSRFToken token) { CommandTabUi.this.xsrfTokenField.setValue(token.getToken()); CommandTabUi.this.commandForm.submit(); CommandTabUi.this.formExecute.setFocus(true); } }); // http://www.gwtproject.org/javadoc/latest/com/google/gwt/user/client/ui/FileUpload.html } }); this.commandForm.setEncoding(FormPanel.ENCODING_MULTIPART); this.commandForm.setMethod(FormPanel.METHOD_POST); this.commandForm.setAction(SERVLET_URL); this.commandForm.addSubmitCompleteHandler(new FormPanel.SubmitCompleteHandler() { @Override public void onSubmitComplete(SubmitCompleteEvent event) { String result = event.getResults(); if (result.contains("HTTP ERROR")) { display(MSGS.fileUploadFailure()); } else { EntryClassUi.showWaitModal(); CommandTabUi.this.gwtXSRFService.generateSecurityToken(new AsyncCallback<GwtXSRFToken>() { @Override public void onFailure(Throwable ex) { EntryClassUi.hideWaitModal(); FailureHandler.handle(ex); } @Override public void onSuccess(GwtXSRFToken token) { CommandTabUi.this.gwtDeviceService.executeCommand(token, CommandTabUi.this.formExecute.getText(), CommandTabUi.this.formPassword.getText(), new AsyncCallback<String>() { @Override public void onFailure(Throwable caught) { if (caught.getLocalizedMessage() .equals(GwtKuraErrorCode.SERVICE_NOT_ENABLED.toString())) { display(MSGS.error() + "\n" + MSGS.commandServiceNotEnabled()); } else if (caught.getLocalizedMessage() .equals(GwtKuraErrorCode.ILLEGAL_ARGUMENT.toString())) { display(MSGS.error() + "\n" + MSGS.commandPasswordNotCorrect()); } else { display(MSGS.error() + "\n" + caught.getLocalizedMessage()); } EntryClassUi.hideWaitModal(); } @Override public void onSuccess(String result) { display(result); EntryClassUi.hideWaitModal(); } }); } }); } } }); } public void display(String string) { this.resultPanel.clear(); this.resultPanel.add(new HTML(new SafeHtmlBuilder().appendEscapedLines(string).toSafeHtml())); } public void setSession(GwtSession currentSession) { this.session = currentSession; } }