content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.apache.activemq.usage;
  
  
  import org.apache.activemq.util.StoreUtil;
  
  import java.io.File;
  
  public abstract class PercentLimitUsage <T extends Usage> extends Usage<T> {
  
      protected int percentLimit = 0;
      protected long total = 0;
  
      /**
       * @param parent
       * @param name
       * @param portion
       */
      public PercentLimitUsage(T parent, String name, float portion) {
          super(parent, name, portion);
      }
  
      public void setPercentLimit(int percentLimit) {
          usageLock.writeLock().lock();
          try {
              this.percentLimit = percentLimit;
              updateLimitBasedOnPercent();
          } finally {
              usageLock.writeLock().unlock();
          }
      }
  
      public int getPercentLimit() {
          usageLock.readLock().lock();
          try {
              return percentLimit;
          } finally {
              usageLock.readLock().unlock();
          }
      }
  
      /**
       * Sets the total available space in bytes. When non zero, the filesystem totalAvailableSpace is ignored.
       * When set using Xbean, values of the form "20 Mb", "1024kb", and "1g" can be used
       *
       * @org.apache.xbean.Property propertyEditor="org.apache.activemq.util.MemoryPropertyEditor"
       */
      public void setTotal(long max) {
          this.total = max;
      }
  
      public long getTotal() {
          return total;
      }
  
  
      protected void percentLimitFromFile(File directory) {
          if (percentLimit > 0) {
              if (total > 0) {
                  this.setLimit(total * percentLimit / 100);
              } else if (directory != null) {
                  File dir = StoreUtil.findParentDirectory(directory);
                  if (dir != null) {
                      this.setLimit(dir.getTotalSpace() * percentLimit / 100);
                  }
              }
          }
      }
  
      protected abstract void updateLimitBasedOnPercent();
  }
  