content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
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   * 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
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   */
  /**
   * Hints subsystem consists of several components.
   *
   * {@link org.apache.cassandra.hints.Hint} encodes all the required metadata and the mutation being hinted.
   *
   * {@link org.apache.cassandra.hints.HintsBuffer} provides a temporary buffer for writing the hints to in a concurrent manner,
   * before we flush them to disk.
   *
   * {@link org.apache.cassandra.hints.HintsBufferPool} is responsible for submitting {@link org.apache.cassandra.hints.HintsBuffer}
   * instances for flushing when they exceed their capacity, and for maitaining a reserve {@link org.apache.cassandra.hints.HintsBuffer}
   * instance, and creating extra ones if flushing cannot keep up with arrival rate.
   *
   * {@link org.apache.cassandra.hints.HintsWriteExecutor} is a single-threaded executor that performs all the writing to disk.
   *
   * {@link org.apache.cassandra.hints.HintsDispatchExecutor} is a multi-threaded executor responsible for dispatch of
   * the hints to their destinations.
   *
   * {@link org.apache.cassandra.hints.HintsStore} tracks the state of all hints files (written and being written to)
   * for a given host id destination.
   *
   * {@link org.apache.cassandra.hints.HintsCatalog} maintains the mapping of host ids to {@link org.apache.cassandra.hints.HintsStore}
   * instances, and provides some aggregate APIs.
   *
   * {@link org.apache.cassandra.hints.HintsService} wraps the catalog, the pool, and the two executors, acting as a front-end
   * for hints.
   */
  package org.apache.cassandra.hints;
  