plugins/org.argeo.slc.client.ui/src/main/java/org/argeo/slc/client/ui/views/JcrExecutionModulesView.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.slc.client.ui.views;
  17
  18 import java.util.ArrayList;
  19 import java.util.Arrays;
  20 import java.util.Comparator;
  21 import java.util.Iterator;
  22 import java.util.List;
  23 import java.util.SortedSet;
  24 import java.util.TreeSet;
  25
  26 import javax.jcr.Node;
  27 import javax.jcr.NodeIterator;
  28 import javax.jcr.Property;
  29 import javax.jcr.RepositoryException;
  30 import javax.jcr.Session;
  31 import javax.jcr.nodetype.NodeType;
  32 import javax.jcr.observation.Event;
  33 import javax.jcr.query.Query;
  34 import javax.jcr.query.QueryManager;
  35
  36 import org.apache.commons.logging.Log;
  37 import org.apache.commons.logging.LogFactory;
  38 import org.argeo.ArgeoException;
  39 import org.argeo.eclipse.ui.jcr.AsyncUiEventListener;
  40 import org.argeo.eclipse.ui.jcr.DefaultNodeLabelProvider;
  41 import org.argeo.eclipse.ui.jcr.NodeElementComparer;
  42 import org.argeo.eclipse.ui.jcr.SimpleNodeContentProvider;
  43 import org.argeo.eclipse.ui.specific.EclipseUiSpecificUtils;
  44 import org.argeo.slc.SlcException;
  45 import org.argeo.slc.client.ui.ClientUiPlugin;
  46 import org.argeo.slc.client.ui.SlcImages;
  47 import org.argeo.slc.client.ui.editors.ProcessEditor;
  48 import org.argeo.slc.client.ui.editors.ProcessEditorInput;
  49 import org.argeo.slc.execution.ExecutionModulesManager;
  50 import org.argeo.slc.jcr.SlcJcrConstants;
  51 import org.argeo.slc.jcr.SlcNames;
  52 import org.argeo.slc.jcr.SlcTypes;
  53 import org.eclipse.jface.viewers.DoubleClickEvent;
  54 import org.eclipse.jface.viewers.IDoubleClickListener;
  55 import org.eclipse.jface.viewers.IStructuredSelection;
  56 import org.eclipse.jface.viewers.ITableLabelProvider;
  57 import org.eclipse.jface.viewers.TreeViewer;
  58 import org.eclipse.swt.SWT;
  59 import org.eclipse.swt.dnd.DND;
  60 import org.eclipse.swt.dnd.DragSourceAdapter;
  61 import org.eclipse.swt.dnd.DragSourceEvent;
  62 import org.eclipse.swt.dnd.TextTransfer;
  63 import org.eclipse.swt.dnd.Transfer;
  64 import org.eclipse.swt.graphics.Image;
  65 import org.eclipse.swt.widgets.Composite;
  66 import org.eclipse.swt.widgets.Display;
  67 import org.eclipse.ui.IWorkbenchPage;
  68 import org.eclipse.ui.PlatformUI;
  69 import org.eclipse.ui.part.ViewPart;
  70
  71 /** JCR based view of the execution modules. */
  72 public class JcrExecutionModulesView extends ViewPart implements SlcTypes,
  73                 SlcNames {
  74         private final static Log log = LogFactory
  75                         .getLog(JcrExecutionModulesView.class);
  76
  77         public static final String ID = "org.argeo.slc.client.ui.jcrExecutionModulesView";
  78
  79         private TreeViewer viewer;
  80
  81         private Session session;
  82
  83         private ExecutionModulesManager modulesManager;
  84
  85         public void createPartControl(Composite parent) {
  86                 viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
  87                 EclipseUiSpecificUtils.enableToolTipSupport(viewer);
  88
  89                 ViewContentProvider contentProvider = new ViewContentProvider(session);
  90                 viewer.setContentProvider(contentProvider);
  91                 viewer.setComparer(new NodeElementComparer());
  92                 final ViewLabelProvider viewLabelProvider = new ViewLabelProvider();
  93                 viewer.setLabelProvider(viewLabelProvider);
  94                 viewer.setInput(getViewSite());
  95                 viewer.addDoubleClickListener(new ViewDoubleClickListener());
  96                 getViewSite().setSelectionProvider(viewer);
  97
  98                 Transfer[] tt = new Transfer[] { TextTransfer.getInstance() };
  99                 // Transfer[] tt = new Transfer[] { EditorInputTransfer.getInstance() };
 100                 int operations = DND.DROP_COPY | DND.DROP_MOVE;
 101                 viewer.addDragSupport(operations, tt, new ViewDragListener());
 102
 103                 try {
 104                         String[] nodeTypes = { SlcTypes.SLC_AGENT,
 105                                         SlcTypes.SLC_AGENT_FACTORY, SlcTypes.SLC_EXECUTION_MODULE };
 106                         session.getWorkspace()
 107                                         .getObservationManager()
 108                                         .addEventListener(
 109                                                         new VmAgentObserver(viewer.getTree().getDisplay()),
 110                                                         Event.NODE_ADDED | Event.NODE_REMOVED
 111                                                                         | Event.NODE_MOVED,
 112                                                         SlcJcrConstants.VM_AGENT_FACTORY_PATH, true, null,
 113                                                         nodeTypes, false);
 114                 } catch (RepositoryException e) {
 115                         throw new SlcException("Cannot add observer", e);
 116                 }
 117         }
 118
 119         public void setFocus() {
 120                 viewer.getControl().setFocus();
 121         }
 122
 123         public TreeViewer getViewer() {
 124                 return viewer;
 125         }
 126
 127         public void refreshView() {
 128                 viewer.setInput(getViewSite());
 129         }
 130
 131         class ViewContentProvider extends SimpleNodeContentProvider {
 132
 133                 public ViewContentProvider(Session session) {
 134                         super(session,
 135                                         new String[] { SlcJcrConstants.VM_AGENT_FACTORY_PATH });
 136                 }
 137
 138                 @Override
 139                 protected Object[] sort(Object parent, Object[] children) {
 140                         Object[] sorted = new Object[children.length];
 141                         System.arraycopy(children, 0, sorted, 0, children.length);
 142                         Arrays.sort(sorted, new ViewComparator());
 143                         return sorted;
 144                 }
 145
 146                 @Override
 147                 protected List<Node> filterChildren(List<Node> children)
 148                                 throws RepositoryException {
 149                         for (Iterator<Node> it = children.iterator(); it.hasNext();) {
 150                                 Node node = it.next();
 151                                 // execution spec definitions
 152                                 if (node.getName().equals(SLC_EXECUTION_SPECS))
 153                                         it.remove();
 154                                 // flow values
 155                                 else if (node.getParent().isNodeType(
 156                                                 SlcTypes.SLC_EXECUTION_FLOW))
 157                                         it.remove();
 158                         }
 159                         return super.filterChildren(children);
 160                 }
 161
 162                 @Override
 163                 public boolean hasChildren(Object element) {
 164                         if (element instanceof Node) {
 165                                 Node node = (Node) element;
 166                                 try {
 167                                         if (node.isNodeType(SlcTypes.SLC_EXECUTION_FLOW))
 168                                                 return false;
 169                                 } catch (RepositoryException e) {
 170                                         throw new SlcException("Cannot check has children", e);
 171                                 }
 172                         }
 173                         return super.hasChildren(element);
 174                 }
 175         }
 176
 177         static class ViewComparator implements Comparator<Object> {
 178
 179                 public int compare(Object o1, Object o2) {
 180                         try {
 181                                 if (o1 instanceof Node && o2 instanceof Node) {
 182                                         Node node1 = (Node) o1;
 183                                         Node node2 = (Node) o2;
 184
 185                                         if (node1.getName().equals(SLC_EXECUTION_SPECS))
 186                                                 return -100;
 187                                         if (node2.getName().equals(SLC_EXECUTION_SPECS))
 188                                                 return 100;
 189
 190                                         if (node1.isNodeType(SLC_EXECUTION_FLOW)
 191                                                         && node2.isNodeType(SLC_EXECUTION_FLOW)) {
 192                                                 return node1.getName().compareTo(node2.getName());
 193                                         } else if (node1.isNodeType(SLC_EXECUTION_FLOW)
 194                                                         && !node2.isNodeType(SLC_EXECUTION_FLOW)) {
 195                                                 return 1;
 196                                         } else if (!node1.isNodeType(SLC_EXECUTION_FLOW)
 197                                                         && node2.isNodeType(SLC_EXECUTION_FLOW)) {
 198                                                 return -1;
 199                                         } else {
 200                                                 // TODO: check title
 201                                                 return node1.getName().compareTo(node2.getName());
 202                                         }
 203                                 }
 204                         } catch (RepositoryException e) {
 205                                 throw new ArgeoException("Cannot compare " + o1 + " and " + o2,
 206                                                 e);
 207                         }
 208                         return 0;
 209                 }
 210
 211         }
 212
 213         class VmAgentObserver extends AsyncUiEventListener {
 214
 215                 public VmAgentObserver(Display display) {
 216                         super(display);
 217                 }
 218
 219                 protected void onEventInUiThread(List<Event> events) {
 220                         for (Event event : events) {
 221                                 try {
 222                                         String path = event.getPath();
 223
 224                                         if (session.itemExists(path)) {
 225                                                 Node parentNode = session.getNode(path);// .getParent();
 226                                                 if (log.isTraceEnabled())
 227                                                         log.trace("Refresh " + parentNode + " after event "
 228                                                                         + event);
 229                                                 viewer.refresh(parentNode);
 230                                         }
 231                                 } catch (RepositoryException e) {
 232                                         log.warn("Cannot process event " + event + ": " + e);
 233                                 }
 234                         }
 235
 236                         // TODO: optimize based on event
 237                         viewer.refresh();
 238                 }
 239         }
 240
 241         class ViewLabelProvider extends DefaultNodeLabelProvider implements
 242                         ITableLabelProvider {
 243
 244                 @Override
 245                 protected String getText(Node node) throws RepositoryException {
 246                         if (node.isNodeType(NodeType.MIX_TITLE)
 247                                         && node.hasProperty(Property.JCR_TITLE))
 248                                 return node.getProperty(Property.JCR_TITLE).getString();
 249                         else if (node.getName().equals(SLC_EXECUTION_SPECS))
 250                                 return "Execution Specifications";
 251                         else if (node.getPath().equals(
 252                                         SlcJcrConstants.VM_AGENT_FACTORY_PATH))
 253                                 return "Internal Agents";
 254                         return super.getText(node);
 255                 }
 256
 257                 @Override
 258                 public Image getImage(Node node) throws RepositoryException {
 259                         // we try to optimize a bit by putting deeper nodes first
 260                         if (node.getParent().isNodeType(
 261                                         SlcTypes.SLC_EXECUTION_SPEC_ATTRIBUTE))
 262                                 return SlcImages.CHOICES;
 263                         else if (node.isNodeType(SlcTypes.SLC_EXECUTION_SPEC_ATTRIBUTE))
 264                                 return SlcImages.EXECUTION_SPEC_ATTRIBUTE;
 265                         else if (node.isNodeType(SlcTypes.SLC_EXECUTION_SPEC))
 266                                 return SlcImages.EXECUTION_SPEC;
 267                         else if (node.getName().equals(SLC_EXECUTION_SPECS))
 268                                 return SlcImages.EXECUTION_SPECS;
 269                         else if (node.isNodeType(SlcTypes.SLC_EXECUTION_FLOW))
 270                                 return SlcImages.FLOW;
 271                         else if (node.isNodeType(SlcTypes.SLC_MODULE)) {
 272                                 if (node.getProperty(SLC_STARTED).getBoolean())
 273                                         return SlcImages.MODULE;
 274                                 else
 275                                         return SlcImages.MODULE_STOPPED;
 276                         } else if (node.isNodeType(SlcTypes.SLC_AGENT))
 277                                 return SlcImages.AGENT;
 278                         else if (node.isNodeType(SlcTypes.SLC_AGENT_FACTORY))
 279                                 return SlcImages.AGENT_FACTORY;
 280                         else
 281                                 return SlcImages.FOLDER;
 282                 }
 283
 284                 public String getToolTipText(Node node) throws RepositoryException {
 285                         if (node.isNodeType(NodeType.MIX_TITLE)
 286                                         && node.hasProperty(Property.JCR_DESCRIPTION))
 287                                 return node.getProperty(Property.JCR_DESCRIPTION).getString();
 288                         return super.getToolTipText(node);
 289                 }
 290
 291                 public String getColumnText(Object obj, int index) {
 292                         return getText(obj);
 293                 }
 294
 295                 public Image getColumnImage(Object obj, int index) {
 296                         return getImage(obj);
 297                 }
 298
 299         }
 300
 301         class ViewDoubleClickListener implements IDoubleClickListener {
 302                 public void doubleClick(DoubleClickEvent evt) {
 303                         Object obj = ((IStructuredSelection) evt.getSelection())
 304                                         .getFirstElement();
 305                         try {
 306                                 if (obj instanceof Node) {
 307                                         Node node = (Node) obj;
 308                                         if (node.isNodeType(SLC_EXECUTION_MODULE)) {
 309                                                 ClientUiPlugin.startStopExecutionModule(modulesManager,
 310                                                                 node);
 311                                         } else {
 312                                                 String path = node.getPath();
 313                                                 // TODO factorize with editor
 314                                                 QueryManager qm = node.getSession().getWorkspace()
 315                                                                 .getQueryManager();
 316                                                 String statement = "SELECT * FROM ["
 317                                                                 + SlcTypes.SLC_EXECUTION_FLOW
 318                                                                 + "] WHERE ISDESCENDANTNODE(['" + path
 319                                                                 + "']) OR ISSAMENODE(['" + path + "'])";
 320                                                 // log.debug(statement);
 321                                                 Query query = qm.createQuery(statement, Query.JCR_SQL2);
 322
 323                                                 // order paths
 324                                                 SortedSet<String> paths = new TreeSet<String>();
 325                                                 for (NodeIterator nit = query.execute().getNodes(); nit
 326                                                                 .hasNext();) {
 327                                                         paths.add(nit.nextNode().getPath());
 328                                                 }
 329
 330                                                 IWorkbenchPage activePage = PlatformUI.getWorkbench()
 331                                                                 .getActiveWorkbenchWindow().getActivePage();
 332                                                 activePage.openEditor(new ProcessEditorInput(
 333                                                                 new ArrayList<String>(paths), true),
 334                                                                 ProcessEditor.ID);
 335                                         }
 336                                 }
 337                         } catch (Exception e) {
 338                                 throw new SlcException("Cannot open " + obj, e);
 339                         }
 340                 }
 341
 342         }
 343
 344         /** Listen to drags */
 345         class ViewDragListener extends DragSourceAdapter {
 346                 public void dragSetData(DragSourceEvent event) {
 347                         IStructuredSelection selection = (IStructuredSelection) viewer
 348                                         .getSelection();
 349                         if (selection.getFirstElement() instanceof Node) {
 350                                 Node node = (Node) selection.getFirstElement();
 351                                 if (TextTransfer.getInstance().isSupportedType(event.dataType)) {
 352                                         try {
 353                                                 event.data = node.getPath();
 354                                         } catch (RepositoryException e) {
 355                                                 throw new SlcException("Cannot read node", e);
 356                                         }
 357                                 }
 358                         }
 359                 }
 360         }
 361
 362         public void setSession(Session session) {
 363                 this.session = session;
 364         }
 365
 366         public void setModulesManager(ExecutionModulesManager modulesManager) {
 367                 this.modulesManager = modulesManager;
 368         }
 369
 370 }