SvnCompatibilityChecker.java

/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License 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 org.jetbrains.idea.svn;

import com.intellij.openapi.application.Application;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.application.ModalityState;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.MessageType;
import com.intellij.openapi.vcs.ui.VcsBalloonProblemNotifier;
import com.intellij.openapi.vfs.VirtualFile;

import java.util.ArrayList;
import java.util.List;

public class SvnCompatibilityChecker {
  private final Project myProject;
  private final static long ourFrequency = 10;
  private final static long ourInvocationMax = 10;
  private final static long ourInitCounter = 3;
  
  private long myCounter;
  private long myDownStartCounter;
  private long myInvocationCounter;

  private final Object myLock = new Object();

  public SvnCompatibilityChecker(Project project) {
    myProject = project;
    myCounter= 0;
    myDownStartCounter = ourInitCounter;
    myInvocationCounter = 0;
  }

  public void reportNoRoots(final List<VirtualFile> result) {
    synchronized (myLock) {
      if (myInvocationCounter >= ourInvocationMax) return;
      ++ myCounter;
      -- myDownStartCounter;
      if ((myCounter > ourFrequency) || (myDownStartCounter >= 0)) {
        myCounter = 0;
        ++ myInvocationCounter;
        final Application application = ApplicationManager.getApplication();
        application.executeOnPooledThread(() -> {
          final List<VirtualFile> suspicious = new ArrayList<>();
          for (VirtualFile vf : result) {
            if (SvnUtil.seemsLikeVersionedDir(vf)) {
              suspicious.add(vf);
            }
          }
          if (!suspicious.isEmpty()) {
            final String message = (suspicious.size() == 1)
                                   ? "Root '" + suspicious.get(0).getPresentableName() + "' is likely to be of unsupported Subversion format"
                                   : "Some roots are likely to be of unsupported Subversion format";
            application
              .invokeLater(() -> new VcsBalloonProblemNotifier(myProject, message, MessageType.WARNING).run(), ModalityState.NON_MODAL,
                           o -> (!myProject.isOpen()) || myProject.isDisposed());
          }
        });
      }
    }
  }
}