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.eclipse.core.regions.Region; import com.amazonaws.eclipse.core.regions.RegionUtils; import com.amazonaws.eclipse.core.regions.ServiceAbbreviations; import com.amazonaws.eclipse.ec2.ui.views.instances.InstanceSelectionTable; import com.amazonaws.services.cloudformation.AmazonCloudFormation; import com.amazonaws.services.cloudformation.model.DescribeStackResourcesRequest; import com.amazonaws.services.cloudformation.model.StackResource; class StackResourcesTable extends Composite { private TreeViewer viewer; private final StackEditorInput stackEditorInput; private InstanceSelectionTable instanceSelectionTable; public StackResourcesTable(Composite parent, FormToolkit toolkit, StackEditorInput stackEditorInput) { super(parent, SWT.NONE); this.stackEditorInput = stackEditorInput; this.setLayout(new GridLayout()); instanceSelectionTable = new InstanceSelectionTable(this); GridData gridData = new GridData(SWT.FILL, SWT.TOP, true, false); gridData.minimumHeight = 200; gridData.heightHint = 200; instanceSelectionTable.setLayoutData(gridData); Region region = RegionUtils.getRegionByEndpoint(stackEditorInput.getRegionEndpoint()); if (region == null) { Status status = new Status(IStatus.WARNING, CloudFormationPlugin.PLUGIN_ID, "Unable to determine region from endpoint " + stackEditorInput.getRegionEndpoint()); StatusManager.getManager().handle(status, StatusManager.LOG); } else { String endpoint = region.getServiceEndpoint(ServiceAbbreviations.EC2); if (endpoint != null) { instanceSelectionTable.setEc2RegionOverride(region); instanceSelectionTable.refreshData(); } if (endpoint == null) { Status status = new Status(IStatus.ERROR, CloudFormationPlugin.PLUGIN_ID, "Unable to determine EC2 endpoint for region " + region.getId()); StatusManager.getManager().handle(status, StatusManager.LOG); } } Composite composite = toolkit.createComposite(this); composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); TreeColumnLayout tableColumnLayout = new TreeColumnLayout(); composite.setLayout(tableColumnLayout); StackResourcesContentProvider contentProvider = new StackResourcesContentProvider(); StackResourcesLabelProvider labelProvider = new StackResourcesLabelProvider(); 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 LoadStackResourcesThread().start(); instanceSelectionTable.refreshData(); } private AmazonCloudFormation getClient() { AWSClientFactory clientFactory = AwsToolkitCore.getClientFactory(stackEditorInput.getAccountId()); return clientFactory.getCloudFormationClientByEndpoint(stackEditorInput.getRegionEndpoint()); } private class LoadStackResourcesThread extends Thread { @Override public void run() { try { DescribeStackResourcesRequest request = new DescribeStackResourcesRequest() .withStackName(stackEditorInput.getStackName()); final List<StackResource> stackResources = getClient().describeStackResources(request) .getStackResources(); List<String> instances = new LinkedList<String>(); for (StackResource resource : stackResources) { if (resource.getResourceType().equalsIgnoreCase("AWS::EC2::Instance")) { instances.add(resource.getPhysicalResourceId()); } } instanceSelectionTable.setInstancesToList(instances); Display.getDefault().asyncExec(new Runnable() { public void run() { viewer.setInput(stackResources.toArray(new StackResource[stackResources.size()])); } }); } catch (Exception e) { Status status = new Status(IStatus.WARNING, CloudFormationPlugin.PLUGIN_ID, "Unable to describe resources for stack " + stackEditorInput.getStackName(), e); StatusManager.getManager().handle(status, StatusManager.LOG); } } } private final class StackResourcesContentProvider implements ITreePathContentProvider { private StackResource[] resources; public void dispose() { } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { if (newInput instanceof StackResource[]) { resources = (StackResource[]) newInput; } else { resources = new StackResource[0]; } } public Object[] getElements(Object inputElement) { return resources; } 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 StackResourcesLabelProvider 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 StackResource == false) return ""; StackResource resource = (StackResource) element; switch (columnIndex) { case 0: return resource.getLogicalResourceId(); case 1: return resource.getPhysicalResourceId(); case 2: return resource.getResourceType(); case 3: return resource.getResourceStatus(); case 4: return resource.getResourceStatusReason(); default: return ""; } } } private void createColumns(TreeColumnLayout columnLayout, Tree tree) { createColumn(tree, columnLayout, "Logical ID"); createColumn(tree, columnLayout, "Physical ID"); createColumn(tree, columnLayout, "Type"); createColumn(tree, columnLayout, "Status"); createColumn(tree, columnLayout, "Status 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; } }