aeron-archive/src/main/java/io/aeron/archive/status/RecordingPos.java
public static String getSourceIdentity(final CountersReader countersReader, final int counterId)
    {
        final DirectBuffer buffer = countersReader.metaDataBuffer();

        if (countersReader.getCounterState(counterId) == RECORD_ALLOCATED)
        {
            final int recordOffset = CountersReader.metaDataOffset(counterId);

            if (buffer.getInt(recordOffset + TYPE_ID_OFFSET) == RECORDING_POSITION_TYPE_ID)
            {
                return buffer.getStringAscii(recordOffset + KEY_OFFSET + SOURCE_IDENTITY_LENGTH_OFFSET);
            }
        }

        return null;
    }
public static String getSourceIdentity(final CountersReader countersReader, final int counterId)
    {
        final DirectBuffer buffer = countersReader.metaDataBuffer();

        if (countersReader.getCounterState(counterId) == RECORD_ALLOCATED)
        {
            final int recordOffset = CountersReader.metaDataOffset(counterId);

            if (buffer.getInt(recordOffset + TYPE_ID_OFFSET) == RECORDING_POSITION_TYPE_ID)
            {
                return buffer.getStringAscii(recordOffset + KEY_OFFSET + SOURCE_IDENTITY_LENGTH_OFFSET);
            }
        }

        return null;
    }
Get the {@link Image#sourceIdentity()} for the recording.

@param countersReader to search within.
@param counterId      for the active recording.
@return {@link Image#sourceIdentity()} for the recording or null if not found.