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.archive;
  
  import io.aeron.Publication;
  import io.aeron.archive.client.ArchiveException;
  import io.aeron.archive.codecs.MessageHeaderEncoder;
  import io.aeron.archive.codecs.RecordingProgressEncoder;
  import io.aeron.archive.codecs.RecordingStartedEncoder;
  import io.aeron.archive.codecs.RecordingStoppedEncoder;
  import io.aeron.logbuffer.BufferClaim;
  import org.agrona.CloseHelper;
  import org.agrona.ExpandableArrayBuffer;
  
  class RecordingEventsProxy implements AutoCloseable
  {
      private static final int SEND_ATTEMPTS = 3;
  
      private final Publication publication;
      private final ExpandableArrayBuffer buffer = new ExpandableArrayBuffer(1024);
      private final BufferClaim bufferClaim = new BufferClaim();
      private final MessageHeaderEncoder messageHeaderEncoder = new MessageHeaderEncoder();
      private final RecordingStartedEncoder recordingStartedEncoder = new RecordingStartedEncoder();
      private final RecordingProgressEncoder recordingProgressEncoder = new RecordingProgressEncoder();
      private final RecordingStoppedEncoder recordingStoppedEncoder = new RecordingStoppedEncoder();
  
      RecordingEventsProxy(final Publication publication)
      {
          this.publication = publication;
      }
  
      /**
       * {@inheritDoc}
       */
      public void close()
      {
          CloseHelper.close(publication);
      }
  
      void started(
          final long recordingId,
          final long startPosition,
          final int sessionId,
          final int streamId,
          final String channel,
          final String sourceIdentity)
      {
          recordingStartedEncoder
              .wrapAndApplyHeader(buffer, 0, messageHeaderEncoder)
              .recordingId(recordingId)
              .startPosition(startPosition)
              .sessionId(sessionId)
              .streamId(streamId)
              .channel(channel)
              .sourceIdentity(sourceIdentity);
  
          final int length = MessageHeaderEncoder.ENCODED_LENGTH + recordingStartedEncoder.encodedLength();
          int attempts = SEND_ATTEMPTS;
          do
          {
              final long position = publication.offer(buffer, 0, length);
              if (position > 0 || Publication.NOT_CONNECTED == position)
              {
                  break;
              }
  
              checkResult(position, publication);
          }
          while (--attempts > 0);
      }
  
      boolean progress(final long recordingId, final long startPosition, final long position)
      {
          final int length = MessageHeaderEncoder.ENCODED_LENGTH + RecordingProgressEncoder.BLOCK_LENGTH;
          final long result = publication.tryClaim(length, bufferClaim);
  
          if (result > 0)
          {
              recordingProgressEncoder
                  .wrapAndApplyHeader(bufferClaim.buffer(), bufferClaim.offset(), messageHeaderEncoder)
                  .recordingId(recordingId)
                  .startPosition(startPosition)
                  .position(position);
  
              bufferClaim.commit();
              return true;
          }
          else
          {
              checkResult(result, publication);
          }
  
          return false;
      }
  
      void stopped(final long recordingId, final long startPosition, final long stopPosition)
      {
          final int length = MessageHeaderEncoder.ENCODED_LENGTH + RecordingStoppedEncoder.BLOCK_LENGTH;
          int attempts = SEND_ATTEMPTS;
  
          do
          {
              final long position = publication.tryClaim(length, bufferClaim);
              if (position > 0)
              {
                  recordingStoppedEncoder
                      .wrapAndApplyHeader(bufferClaim.buffer(), bufferClaim.offset(), messageHeaderEncoder)
                      .recordingId(recordingId)
                      .startPosition(startPosition)
                      .stopPosition(stopPosition);
  
                  bufferClaim.commit();
                  break;
              }
              else if (Publication.NOT_CONNECTED == position)
              {
                  break;
              }
  
              checkResult(position, publication);
          }
          while (--attempts > 0);
      }
  
      private static void checkResult(final long position, final Publication publication)
      {
          if (position == Publication.CLOSED)
          {
              throw new ArchiveException("recording events publication is closed");
          }
  
          if (position == Publication.MAX_POSITION_EXCEEDED)
          {
              throw new ArchiveException(
                  "recording events publication at max position, term-length=" + publication.termBufferLength());
          }
      }
  }
  