plugins/svn4idea/src/org/jetbrains/idea/svn/SvnCompatibilityChecker.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   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.jetbrains.idea.svn;
  17
  18 import com.intellij.openapi.application.Application;
  19 import com.intellij.openapi.application.ApplicationManager;
  20 import com.intellij.openapi.application.ModalityState;
  21 import com.intellij.openapi.project.Project;
  22 import com.intellij.openapi.ui.MessageType;
  23 import com.intellij.openapi.vcs.changes.ui.ChangesViewBalloonProblemNotifier;
  24 import com.intellij.openapi.vfs.VirtualFile;
  25
  26 import java.util.ArrayList;
  27 import java.util.List;
  28
  29 public class SvnCompatibilityChecker {
  30   private final Project myProject;
  31   private final static long ourFrequency = 10;
  32   private final static long ourInvocationMax = 10;
  33   private final static long ourInitCounter = 3;
  34
  35   private long myCounter;
  36   private long myDownStartCounter;
  37   private long myInvocationCounter;
  38
  39   private final Object myLock = new Object();
  40
  41   public SvnCompatibilityChecker(Project project) {
  42     myProject = project;
  43     myCounter= 0;
  44     myDownStartCounter = ourInitCounter;
  45     myInvocationCounter = 0;
  46   }
  47
  48   public void reportNoRoots(final List<VirtualFile> result) {
  49     synchronized (myLock) {
  50       if (myInvocationCounter >= ourInvocationMax) return;
  51       ++ myCounter;
  52       -- myDownStartCounter;
  53       if ((myCounter > ourFrequency) || (myDownStartCounter >= 0)) {
  54         myCounter = 0;
  55         ++ myInvocationCounter;
  56         final Application application = ApplicationManager.getApplication();
  57         application.executeOnPooledThread(new Runnable() {
  58           public void run() {
  59             final List<VirtualFile> suspicious = new ArrayList<VirtualFile>();
  60             for (VirtualFile vf : result) {
  61               if (SvnUtil.seemsLikeVersionedDir(vf)) {
  62                 suspicious.add(vf);
  63               }
  64             }
  65             if (! suspicious.isEmpty()) {
  66               final String message = (suspicious.size() == 1) ?
  67                                      "Root '" + suspicious.get(0).getPresentableName() + "' is likely to be of unsupported Subversion format" :
  68                                      "Some roots are likely to be of unsupported Subversion format";
  69               application.invokeLater(new Runnable() {
  70                 public void run() {
  71                   new ChangesViewBalloonProblemNotifier(myProject, message, MessageType.WARNING).run();
  72                 }
  73               }, ModalityState.NON_MODAL);
  74             }
  75           }
  76         });
  77       }
  78     }
  79   }
  80 }