Java tutorial
/* * Copyright 2012 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.cloudformation; import java.util.LinkedList; import java.util.List; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.jface.layout.TreeColumnLayout; import org.eclipse.jface.viewers.ColumnWeightData; import org.eclipse.jface.viewers.ILabelProviderListener; import org.eclipse.jface.viewers.ITableLabelProvider; import org.eclipse.jface.viewers.ITreePathContentProvider; import org.eclipse.jface.viewers.TreePath; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Tree; import org.eclipse.swt.widgets.TreeColumn; import org.eclipse.ui.forms.widgets.FormToolkit; import org.eclipse.ui.statushandlers.StatusManager; import com.amazonaws.eclipse.cloudformation.CloudFormationPlugin; import com.amazonaws.eclipse.core.AWSClientFactory; import com.amazonaws.eclipse.core.AwsToolkitCore; import com.amazonaws.services.cloudformation.AmazonCloudFormation; import com.amazonaws.services.cloudformation.model.DescribeStackEventsRequest; import com.amazonaws.services.cloudformation.model.DescribeStackEventsResult; import com.amazonaws.services.cloudformation.model.StackEvent; public class StackEventsTable extends Composite { private TreeViewer viewer; private final StackEditorInput stackEditorInput; private final class StackEventsContentProvider implements ITreePathContentProvider { private StackEvent[] events; public void dispose() { } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { if (newInput instanceof StackEvent[]) { events = (StackEvent[]) newInput; } else { events = new StackEvent[0]; } } public Object[] getElements(Object inputElement) { return events; } public Object[] getChildren(TreePath parentPath) { return null; } public boolean hasChildren(TreePath path) { return false; } public TreePath[] getParents(Object element) { return new TreePath[0]; } } private final class StackEventsLabelProvider implements ITableLabelProvider { public void addListener(ILabelProviderListener listener) { } public void removeListener(ILabelProviderListener listener) { } public void dispose() { } public boolean isLabelProperty(Object element, String property) { return false; } public Image getColumnImage(Object element, int columnIndex) { return null; } public String getColumnText(Object element, int columnIndex) { if (element instanceof StackEvent == false) return ""; StackEvent stackEvent = (StackEvent) element; switch (columnIndex) { case 0: return stackEvent.getTimestamp().toString(); case 1: return stackEvent.getResourceStatus(); case 2: return stackEvent.getResourceType(); case 3: return stackEvent.getLogicalResourceId(); case 4: return stackEvent.getPhysicalResourceId(); case 5: return stackEvent.getResourceStatusReason(); } return element.toString(); } } public StackEventsTable(Composite parent, FormToolkit toolkit, StackEditorInput stackEditorInput) { super(parent, SWT.NONE); this.stackEditorInput = stackEditorInput; this.setLayout(new GridLayout()); Composite composite = toolkit.createComposite(this); composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); TreeColumnLayout tableColumnLayout = new TreeColumnLayout(); composite.setLayout(tableColumnLayout); StackEventsContentProvider contentProvider = new StackEventsContentProvider(); StackEventsLabelProvider labelProvider = new StackEventsLabelProvider(); viewer = new TreeViewer(composite, SWT.BORDER | SWT.MULTI); viewer.getTree().setLinesVisible(true); viewer.getTree().setHeaderVisible(true); viewer.setLabelProvider(labelProvider); viewer.setContentProvider(contentProvider); createColumns(tableColumnLayout, viewer.getTree()); refresh(); } public void refresh() { new LoadStackEventsThread().start(); } private void createColumns(TreeColumnLayout columnLayout, Tree tree) { createColumn(tree, columnLayout, "Event Time"); createColumn(tree, columnLayout, "State"); createColumn(tree, columnLayout, "Resource Type"); createColumn(tree, columnLayout, "Logical ID"); createColumn(tree, columnLayout, "Physical ID"); createColumn(tree, columnLayout, "Reason"); } private TreeColumn createColumn(Tree tree, TreeColumnLayout columnLayout, String text) { TreeColumn column = new TreeColumn(tree, SWT.NONE); column.setText(text); column.setMoveable(true); columnLayout.setColumnData(column, new ColumnWeightData(30)); return column; } private AmazonCloudFormation getClient() { AWSClientFactory clientFactory = AwsToolkitCore.getClientFactory(stackEditorInput.getAccountId()); return clientFactory.getCloudFormationClientByEndpoint(stackEditorInput.getRegionEndpoint()); } private class LoadStackEventsThread extends Thread { @Override public void run() { try { DescribeStackEventsRequest request = new DescribeStackEventsRequest() .withStackName(stackEditorInput.getStackName()); final List<StackEvent> stackEvents = new LinkedList<StackEvent>(); DescribeStackEventsResult result = null; do { if (result != null) request.setNextToken(result.getNextToken()); result = getClient().describeStackEvents(request); stackEvents.addAll(result.getStackEvents()); } while (result.getNextToken() != null); Display.getDefault().asyncExec(new Runnable() { public void run() { viewer.setInput(stackEvents.toArray(new StackEvent[stackEvents.size()])); } }); } catch (Exception e) { Status status = new Status(IStatus.WARNING, CloudFormationPlugin.PLUGIN_ID, "Unable to describe events for stack " + stackEditorInput.getStackName(), e); StatusManager.getManager().handle(status, StatusManager.LOG); } } } }