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.cassandra.utils.memory;
  
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  
  import static org.apache.cassandra.utils.FBUtilities.prettyPrintMemory;
  
  public class BufferPools
  {
      private static final Logger logger = LoggerFactory.getLogger(BufferPools.class);
  
      /**
       * Used by chunk cache to store decompressed data and buffers may be held by chunk cache for arbitrary period.
       */
      private static final long FILE_MEMORY_USAGE_THRESHOLD = DatabaseDescriptor.getFileCacheSizeInMiB() * 1024L * 1024L;
      private static final BufferPool CHUNK_CACHE_POOL = new BufferPool("chunk-cache", FILE_MEMORY_USAGE_THRESHOLD, true);
  
      /**
       * Used by client-server or inter-node requests, buffers should be released immediately after use.
       */
      private static final long NETWORKING_MEMORY_USAGE_THRESHOLD = DatabaseDescriptor.getNetworkingCacheSizeInMiB() * 1024L * 1024L;
      private static final BufferPool NETWORKING_POOL = new BufferPool("networking", NETWORKING_MEMORY_USAGE_THRESHOLD, false);
  
      static
      {
          logger.info("Global buffer pool limit is {} for {} and {} for {}",
                      prettyPrintMemory(FILE_MEMORY_USAGE_THRESHOLD),
                      CHUNK_CACHE_POOL.name,
                      prettyPrintMemory(NETWORKING_MEMORY_USAGE_THRESHOLD),
                      NETWORKING_POOL.name);
  
      }
      /**
       * Long-lived buffers used for chunk cache and other disk access
       */
      public static BufferPool forChunkCache()
      {
          return CHUNK_CACHE_POOL;
      }
  
      /**
       * Short-lived buffers used for internode messaging or client-server connections.
       */
      public static BufferPool forNetworking()
      {
          return NETWORKING_POOL;
      }
  
      public static void shutdownLocalCleaner(long timeout, TimeUnit unit) throws TimeoutException, InterruptedException
      {
          CHUNK_CACHE_POOL.shutdownLocalCleaner(timeout, unit);
          NETWORKING_POOL.shutdownLocalCleaner(timeout, unit);
      }
  
  }
  