Java tutorial
/***************************************************************************** * Copyright (c) 2008 g-Eclipse Consortium * 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 * * Initial development of the original code was made for the * g-Eclipse project founded by European Union * project number: FP6-IST-034327 http://www.geclipse.eu/ * * Contributors: * Moritz Post - initial API and implementation *****************************************************************************/ package eu.geclipse.aws.ec2.ui.wizards; import java.lang.reflect.InvocationTargetException; import java.net.URL; import java.text.MessageFormat; import java.util.List; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.jface.operation.IRunnableWithProgress; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Link; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; import com.xerox.amazonws.ec2.AddressInfo; import eu.geclipse.aws.ec2.EC2Instance; import eu.geclipse.aws.ec2.EC2Registry; import eu.geclipse.aws.ec2.IEC2; import eu.geclipse.aws.ec2.op.EC2OpDescribeAddresses; import eu.geclipse.aws.ec2.op.OperationExecuter; import eu.geclipse.aws.ec2.ui.internal.Activator; import eu.geclipse.aws.vo.AWSVirtualOrganization; import eu.geclipse.core.reporting.ProblemException; /** * This {@link WizardPage} provides the form elements to choose an elastic IP * which is to be associated with an ec2 instance. * * @author Moritz Post */ public class SelectElasticIPWizardPage extends WizardPage { /** Id of this Wizard page. */ private static final String WIZARD_PAGE_ID = "eu.geclipse.aws.ec2.ui.wizard.elasticIp"; //$NON-NLS-1$ /** The source for AWS credentials. */ private AWSVirtualOrganization awsVo; /** This widget lists all elastic IPs. */ private Table tableElasticIPs; /** * Creates the wizard page with the awsVo providing the aws credentials and * the ec2Instance providing some information about the target ec2 instance. * * @param awsVo the aws credentials source * @param ec2Instance the ec2 instance to associate */ public SelectElasticIPWizardPage(final AWSVirtualOrganization awsVo, final EC2Instance ec2Instance) { super(SelectElasticIPWizardPage.WIZARD_PAGE_ID, Messages.getString("SelectElasticIPWizardPage.wizard_page_title"), //$NON-NLS-1$ null); setDescription(MessageFormat.format(Messages.getString("SelectElasticIPWizardPage.wizard_page_description"), //$NON-NLS-1$ ec2Instance.getInstanceId())); URL imgUrl = Activator.getDefault().getBundle().getEntry("icons/wizban/service_wiz.gif"); //$NON-NLS-1$ setImageDescriptor(ImageDescriptor.createFromURL(imgUrl)); this.awsVo = awsVo; setPageComplete(false); } public void createControl(final Composite parent) { Composite mainComp = new Composite(parent, SWT.NONE); mainComp.setLayout(new GridLayout(1, false)); this.tableElasticIPs = new Table(mainComp, SWT.SINGLE | SWT.FULL_SELECTION | SWT.BORDER); this.tableElasticIPs.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); this.tableElasticIPs.setLinesVisible(true); this.tableElasticIPs.setHeaderVisible(true); this.tableElasticIPs.addListener(SWT.Selection, new Listener() { public void handleEvent(final Event event) { TableItem[] selection = SelectElasticIPWizardPage.this.tableElasticIPs.getSelection(); if (selection.length > 0) { setPageComplete(true); } } }); TableColumn tableColumnElasticIP = new TableColumn(this.tableElasticIPs, SWT.LEFT); tableColumnElasticIP .setText(Messages.getString("SelectElasticIPWizardPage.table_elastic_ip_column_elastic_ip_title")); //$NON-NLS-1$ TableColumn tableColumnInstanceId = new TableColumn(this.tableElasticIPs, SWT.LEFT); tableColumnInstanceId .setText(Messages.getString("SelectElasticIPWizardPage.table_elastic_ip_column_instance_id_title")); //$NON-NLS-1$ for (int i = 0; i < this.tableElasticIPs.getColumnCount(); i++) { this.tableElasticIPs.getColumn(i).pack(); } Link refreshLink = new Link(mainComp, SWT.NONE); refreshLink.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false)); refreshLink.setText(Messages.getString("SelectElasticIPWizardPage.link_refresh_elastic_ips")); //$NON-NLS-1$ refreshLink.addListener(SWT.Selection, new Listener() { public void handleEvent(final Event event) { refreshElasticIPs(); setPageComplete(false); } }); setControl(mainComp); refreshElasticIPs(); } /** * Fills the {@link #tableElasticIPs} with the elastic IPs associated with the * AWS account bound to the {@link #awsVo}. */ protected void refreshElasticIPs() { try { getContainer().run(false, false, new IRunnableWithProgress() { public void run(final IProgressMonitor monitor) throws InvocationTargetException, InterruptedException { try { monitor.beginTask(Messages.getString("SelectElasticIPWizardPage.monitor_title"), 2); //$NON-NLS-1$ EC2Registry registry = EC2Registry.getRegistry(); IEC2 ec2 = registry.getEC2(SelectElasticIPWizardPage.this.awsVo); EC2OpDescribeAddresses opDescribeAddresses = new EC2OpDescribeAddresses(ec2); monitor.worked(1); new OperationExecuter().execOp(opDescribeAddresses); if (opDescribeAddresses.getException() != null) { throw new InvocationTargetException(opDescribeAddresses.getException().getCause()); } populateElasticIPTable(opDescribeAddresses.getResult()); } catch (ProblemException problemEx) { Activator.log("Could not obtain IEC2 instance", problemEx); //$NON-NLS-1$ } finally { monitor.done(); } } }); } catch (InvocationTargetException invTargetEx) { Activator.log("An problem occured while refreshing the elastic IPs", //$NON-NLS-1$ invTargetEx); } catch (InterruptedException interruptedEx) { Activator.log("The thread was interrupted while refreshing the elastic IPs", //$NON-NLS-1$ interruptedEx); } } /** * Fills the {@link #tableElasticIPs} with the data contained within the * <code>addressInfos</code> parameter. * * @param addressInfos the data to fill the table with */ protected void populateElasticIPTable(final List<AddressInfo> addressInfos) { String none = "none"; //$NON-NLS-1$ this.tableElasticIPs.removeAll(); for (AddressInfo addressInfo : addressInfos) { String instanceId = addressInfo.getInstanceId(); if (instanceId.length() == 0) { instanceId = none; } String[] fields = new String[] { addressInfo.getPublicIp(), instanceId }; TableItem tableItem = new TableItem(this.tableElasticIPs, SWT.NONE); tableItem.setData(addressInfo); tableItem.setText(fields); } } /** * A getter for the Elastic IP which is selected in the * {@link #tableElasticIPs}. * * @return the selected IP address */ public String getSelectedElasticIP() { TableItem[] selection = this.tableElasticIPs.getSelection(); if (selection.length > 0) { AddressInfo addressInfo = (AddressInfo) selection[0].getData(); return addressInfo.getPublicIp(); } return null; } }