content: /*
   * Copyright 2014-2025 Real Logic Limited.
   *
   * 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
   *
   * https://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 io.aeron.driver.reports;
  
  import java.io.File;
  import java.nio.MappedByteBuffer;
  import java.nio.channels.FileChannel;
  
  import static org.agrona.IoUtil.mapExistingFile;
  import static org.agrona.IoUtil.mapNewFile;
  
  /**
   * Utility functions for dealing with the Loss Report.
   */
  public final class LossReportUtil
  {
      /**
       * Name of the error report file in the Aeron directory.
       */
      public static final String LOSS_REPORT_FILE_NAME = "loss-report.dat";
  
      /**
       * Create a new {@link File} object for the loss report.
       *
       * @param aeronDirectoryName in which the loss report should exist.
       * @return the new {@link File} for the loss report.
       */
      public static File file(final String aeronDirectoryName)
      {
          return new File(aeronDirectoryName, LOSS_REPORT_FILE_NAME);
      }
  
      /**
       * Map a new loss report in the Aeron directory for a given length.
       *
       * @param aeronDirectoryName in which to create the file.
       * @param reportFileLength   for the file.
       * @return the newly mapped buffer for the file.
       */
      public static MappedByteBuffer mapLossReport(final String aeronDirectoryName, final int reportFileLength)
      {
          return mapNewFile(file(aeronDirectoryName), reportFileLength, false);
      }
  
      /**
       * Map a new loss report in the Aeron directory for a given length.
       *
       * @param aeronDirectoryName containing the file
       * @return the read only mapped buffer for the file.
       */
      public static MappedByteBuffer mapLossReportReadOnly(final String aeronDirectoryName)
      {
          return mapExistingFile(file(aeronDirectoryName), FileChannel.MapMode.READ_ONLY, "Loss Report");
      }
  }
  