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.journal;
  
  import java.util.concurrent.TimeUnit;
  
  public interface Params
  {
      enum FlushMode { BATCH, GROUP, PERIODIC }
  
      enum FailurePolicy { STOP, STOP_JOURNAL, IGNORE, ALLOW_UNSAFE_STARTUP, DIE }
      enum ReplayMode { RESET, ALL, ONLY_NON_DURABLE }
  
      /**
       * @return maximum segment size
       */
      int segmentSize();
  
      /**
       * @return this journal's {@link FailurePolicy}
       */
      FailurePolicy failurePolicy();
  
      /**
       * @return journal flush (sync) mode
       */
      FlushMode flushMode();
  
      ReplayMode replayMode();
  
      boolean enableCompaction();
  
      long compactionPeriod(TimeUnit units);
  
      /**
       * @return milliseconds between journal flushes
       */
      long flushPeriod(TimeUnit units);
  
      /**
       * @return to block writes for while waiting for a slow fsync to complete
       * when in {@link FlushMode#PERIODIC} mode
       */
      long periodicBlockPeriod(TimeUnit units);
  
      /**
       * @return user provided version to use for key and value serialization
       */
      int userVersion();
  }
  