/*
 * Copyright 2000-2016 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 com.intellij.vcs.log.impl;

import com.intellij.ide.caches.CachesInvalidator;
import com.intellij.openapi.util.io.FileUtil;
import com.intellij.util.ArrayUtil;
import com.intellij.vcs.log.util.PersistentUtil;

public class VcsLogCachesInvalidator extends CachesInvalidator {

  public synchronized boolean isValid() {
    if (PersistentUtil.getCorruptionMarkerFile().exists()) {
      boolean deleted = FileUtil.delete(PersistentUtil.LOG_CACHE);
      if (!deleted) {
        // if could not delete caches, ensure that corruption marker is still there
        FileUtil.createIfDoesntExist(PersistentUtil.getCorruptionMarkerFile());
      }
      return deleted;
    }
    return true;
  }

  @Override
  public void invalidateCaches() {
    if (PersistentUtil.LOG_CACHE.exists()) {
      String[] children = PersistentUtil.LOG_CACHE.list();
      if (!ArrayUtil.isEmpty(children)) {
        FileUtil.createIfDoesntExist(PersistentUtil.getCorruptionMarkerFile());
      }
    }
  }
}

@@ -680,16 +680,63 @@
 idator;%0A
+import com.intellij.openapi.diagnostic.Logger;%0A
 import c
@@ -769,24 +769,24 @@
 o.FileUtil;%0A
-
 import com.i
@@ -923,16 +923,103 @@
 idator %7B
+%0A  private static final Logger LOG = Logger.getInstance(VcsLogCachesInvalidator.class);
 %0A%0A  publ
@@ -1288,16 +1288,16 @@
 l there%0A
-
         
@@ -1372,24 +1372,121 @@
 ));%0A      %7D%0A
+      else %7B%0A        LOG.debug(%22Deleted VCS Log caches at %22 + PersistentUtil.LOG_CACHE);%0A      %7D%0A
       return

add logging message when log caches deleted