Java tutorial
/* * Copyright 2011 Amazon Technologies, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://aws.amazon.com/apache2.0 * * This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES * OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and * limitations under the License. */ package com.amazonaws.eclipse.explorer.sqs; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.eclipse.core.runtime.Status; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.IMenuManager; import org.eclipse.jface.action.Separator; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.navigator.CommonActionProvider; import org.eclipse.ui.statushandlers.StatusManager; import com.amazonaws.eclipse.core.AwsToolkitCore; import com.amazonaws.eclipse.explorer.ContentProviderRegistry; import com.amazonaws.eclipse.explorer.sqs.SQSContentProvider.QueueNode; import com.amazonaws.services.sqs.AmazonSQS; import com.amazonaws.services.sqs.model.CreateQueueRequest; import com.amazonaws.services.sqs.model.DeleteQueueRequest; public class SQSActionProvider extends CommonActionProvider { @Override public void fillContextMenu(IMenuManager menu) { StructuredSelection selection = (StructuredSelection) getActionSite().getStructuredViewer().getSelection(); menu.add(new CreateQueueAction()); boolean onlyQueuesSelected = true; List<String> selectedQueues = new ArrayList<String>(); Iterator<?> iterator = selection.iterator(); while (iterator.hasNext()) { Object next = iterator.next(); if (next instanceof QueueNode) { selectedQueues.add(((QueueNode) next).getQueueUrl()); } else { onlyQueuesSelected = false; } } if (selectedQueues.size() > 0 && onlyQueuesSelected) { menu.add(new DeleteQueueAction(selectedQueues)); } if (selectedQueues.size() == 1 && onlyQueuesSelected) { menu.add(new Separator()); menu.add(new AddMessageAction(AwsToolkitCore.getClientFactory().getSQSClient(), selectedQueues.get(0), null)); } } private static class CreateQueueAction extends Action { public CreateQueueAction() { this.setText("Create New Queue"); this.setToolTipText("Create a new Amazon SQS Queue"); this.setImageDescriptor( AwsToolkitCore.getDefault().getImageRegistry().getDescriptor(AwsToolkitCore.IMAGE_ADD)); } @Override public void run() { AmazonSQS sqs = AwsToolkitCore.getClientFactory().getSQSClient(); CreateQueueDialog createQueueDialog = new CreateQueueDialog(); if (createQueueDialog.open() == 0) { try { sqs.createQueue(new CreateQueueRequest(createQueueDialog.getQueueName())); ContentProviderRegistry.refreshAllContentProviders(); } catch (Exception e) { Status status = new Status(Status.ERROR, AwsToolkitCore.PLUGIN_ID, "Unable to create SQS Queue", e); StatusManager.getManager().handle(status, StatusManager.SHOW | StatusManager.LOG); } } } } private static class CreateQueueDialog extends MessageDialog { private String queueName; public CreateQueueDialog() { super(Display.getDefault().getActiveShell(), "Create New SQS Queue", null, "Enter the name for your new SQS Queue.", MessageDialog.INFORMATION, new String[] { "OK", "Cancel" }, 0); } public String getQueueName() { return queueName; } @Override protected Control createCustomArea(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); composite.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false)); composite.setLayout(new GridLayout(2, false)); new Label(composite, SWT.NONE).setText("Queue Name:"); final Text topicNameText = new Text(composite, SWT.BORDER); topicNameText.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); topicNameText.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { queueName = topicNameText.getText(); updateControls(); } }); return composite; } private void updateControls() { boolean isValid = (queueName != null && queueName.trim().length() > 0); Button okButton = this.getButton(0); if (okButton != null) okButton.setEnabled(isValid); } @Override protected void createButtonsForButtonBar(Composite parent) { super.createButtonsForButtonBar(parent); updateControls(); } } private static class DeleteQueueAction extends Action { private final List<String> queues; public DeleteQueueAction(List<String> queueUrls) { this.queues = queueUrls; this.setText("Delete Queue" + (queueUrls.size() > 1 ? "s" : "")); this.setToolTipText("Delete the selected Amazon SQS queues"); this.setImageDescriptor( AwsToolkitCore.getDefault().getImageRegistry().getDescriptor(AwsToolkitCore.IMAGE_REMOVE)); } @Override public void run() { Dialog dialog = newConfirmationDialog("Delete selected queues?", "Are you sure you want to delete the selected Amazon SQS queues?"); if (dialog.open() != 0) return; AmazonSQS sqs = AwsToolkitCore.getClientFactory().getSQSClient(); for (String queueUrl : queues) { try { sqs.deleteQueue(new DeleteQueueRequest(queueUrl)); } catch (Exception e) { Status status = new Status(Status.ERROR, AwsToolkitCore.PLUGIN_ID, "Unable to delete Amazon SQS queue " + queueUrl, e); StatusManager.getManager().handle(status, StatusManager.LOG | StatusManager.SHOW); } } ContentProviderRegistry.refreshAllContentProviders(); } private Dialog newConfirmationDialog(String title, String message) { return new MessageDialog(Display.getDefault().getActiveShell(), title, null, message, MessageDialog.WARNING, new String[] { "OK", "Cancel" }, 0); } } }