server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/commands/DumpNode.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.jcr.ui.explorer.commands;
  17
  18 import java.io.File;
  19 import java.io.FileOutputStream;
  20 import java.io.IOException;
  21 import java.text.DateFormat;
  22 import java.text.SimpleDateFormat;
  23 import java.util.GregorianCalendar;
  24 import java.util.HashMap;
  25 import java.util.Iterator;
  26 import java.util.Map;
  27
  28 import javax.jcr.Node;
  29 import javax.jcr.RepositoryException;
  30
  31 import org.argeo.ArgeoException;
  32 import org.argeo.eclipse.ui.specific.OpenFile;
  33 import org.argeo.eclipse.ui.utils.CommandUtils;
  34 import org.argeo.jcr.ui.explorer.JcrExplorerPlugin;
  35 import org.argeo.jcr.ui.explorer.model.SingleJcrNodeElem;
  36 import org.eclipse.core.commands.AbstractHandler;
  37 import org.eclipse.core.commands.ExecutionEvent;
  38 import org.eclipse.core.commands.ExecutionException;
  39 import org.eclipse.jface.viewers.ISelection;
  40 import org.eclipse.jface.viewers.IStructuredSelection;
  41 import org.eclipse.ui.handlers.HandlerUtil;
  42
  43 /**
  44  * If the method
  45  * <code> HandlerUtil.getActiveWorkbenchWindow(event).getActivePage().getSelection() </code>
  46  * exits and has a SingleJcrNodeElem as first element, it canonically calls the
  47  * JCR Session.exportSystemView() method on the underlying node with both
  48  * skipBinary & noRecurse boolean flags set to false.
  49  *
  50  * Resulting stream is saved in a tmp file and opened via the "open file"
  51  * single-sourced command.
  52  */
  53 public class DumpNode extends AbstractHandler {
  54         public final static String ID = JcrExplorerPlugin.ID + ".dumpNode";
  55
  56         private final static DateFormat df = new SimpleDateFormat(
  57                         "yyyy-MM-dd_HH-mm");
  58
  59         public Object execute(ExecutionEvent event) throws ExecutionException {
  60                 ISelection selection = HandlerUtil.getActiveWorkbenchWindow(event)
  61                                 .getActivePage().getSelection();
  62                 if (selection == null || !(selection instanceof IStructuredSelection))
  63                         return null;
  64
  65                 Iterator<?> lst = ((IStructuredSelection) selection).iterator();
  66                 if (lst.hasNext()) {
  67                         Object element = lst.next();
  68                         if (element instanceof SingleJcrNodeElem) {
  69                                 SingleJcrNodeElem sjn = (SingleJcrNodeElem) element;
  70                                 Node node = sjn.getNode();
  71
  72                                 // TODO add a dialog to configure the export and ask for
  73                                 // confirmation
  74                                 // Boolean ok = MessageDialog.openConfirm(
  75                                 // HandlerUtil.getActiveShell(event), "Confirm deletion",
  76                                 // "Do you want to delete " + buf + "?");
  77
  78                                 File tmpFile;
  79                                 FileOutputStream fos;
  80                                 try {
  81                                         tmpFile = File.createTempFile("JcrExport", ".xml");
  82                                         tmpFile.deleteOnExit();
  83                                         fos = new FileOutputStream(tmpFile);
  84                                         String dateVal = df.format(new GregorianCalendar()
  85                                                         .getTime());
  86                                         node.getSession().exportSystemView(node.getPath(), fos,
  87                                                         true, false);
  88                                         openGeneratedFile(tmpFile.getAbsolutePath(),
  89                                                         "Dump-" + node.getName() + dateVal + ".xml");
  90                                 } catch (RepositoryException e) {
  91                                         throw new ArgeoException(
  92                                                         "Unable to perform SystemExport on " + node, e);
  93                                 } catch (IOException e) {
  94                                         throw new ArgeoException("Unable to SystemExport " + node,
  95                                                         e);
  96                                 }
  97                         }
  98                 }
  99                 return null;
 100         }
 101
 102         private synchronized void openGeneratedFile(String path, String fileName) {
 103                 Map<String, String> params = new HashMap<String, String>();
 104                 params.put(OpenFile.PARAM_FILE_NAME, fileName);
 105                 params.put(OpenFile.PARAM_FILE_URI, "file://" + path);
 106                 CommandUtils.callCommand("org.argeo.security.ui.specific.openFile",
 107                                 params);
 108         }
 109 }