Examples with DownloadListener com.biglybt.pif.download.DownloadListener used on opensource projects

Example 1 with DownloadListener

use of com.biglybt.pif.download.DownloadListener in project BiglyBT by BiglySoftware.

the class DiskManagerRandomReadController method executeRequest.

private void executeRequest() {
    DiskManagerRandomReadRequestImpl request;
    synchronized (requests) {
        if (requests.isEmpty()) {
            return;
        }
        request = requests.remove(0);
    }
    if (request.isCancelled()) {
        return;
    }
    DiskManagerFileInfoListener info_listener = null;
    com.biglybt.core.disk.DiskManagerFileInfo core_file = request.getFile().getCore();
    DownloadManager core_download = core_file.getDownloadManager();
    int prev_hint_piece = -1;
    int curr_hint_piece = -1;
    try {
        if (core_download.getTorrent() == null) {
            throw (new DownloadException("Torrent invalid"));
        }
        if (core_download.isDestroyed()) {
            Debug.out("Download has been removed");
            throw (new DownloadException("Download has been removed"));
        }
        TOTorrentFile tf = core_file.getTorrentFile();
        TOTorrent torrent = tf.getTorrent();
        TOTorrentFile[] tfs = torrent.getFiles();
        long core_file_start_byte = 0;
        for (int i = 0; i < core_file.getIndex(); i++) {
            core_file_start_byte += tfs[i].getLength();
        }
        long download_byte_start = core_file_start_byte + request.getOffset();
        long download_byte_end = download_byte_start + request.getLength();
        int piece_size = (int) tf.getTorrent().getPieceLength();
        if (core_file.getDownloaded() != core_file.getLength()) {
            if (core_file.isSkipped()) {
                core_file.setSkipped(false);
            }
            boolean force_start = download.isForceStart();
            if (!force_start) {
                download.setForceStart(true);
                set_force_start = true;
                final AESemaphore running_sem = new AESemaphore("rs");
                DownloadListener dl_listener = new DownloadListener() {

                    @Override
                    public void stateChanged(Download download, int old_state, int new_state) {
                        if (new_state == Download.ST_DOWNLOADING || new_state == Download.ST_SEEDING) {
                            running_sem.release();
                        }
                    }

                    @Override
                    public void positionChanged(Download download, int oldPosition, int newPosition) {
                    }
                };
                download.addListener(dl_listener);
                try {
                    if (download.getState() != Download.ST_DOWNLOADING && download.getState() != Download.ST_SEEDING) {
                        if (!running_sem.reserve(10 * 1000)) {
                            throw (new DownloadException("timeout waiting for download to start"));
                        }
                    }
                } finally {
                    download.removeListener(dl_listener);
                }
            }
        }
        boolean is_reverse = request.isReverse();
        final AESemaphore wait_sem = new AESemaphore("rr:waiter");
        info_listener = new DiskManagerFileInfoListener() {

            @Override
            public void dataWritten(long offset, long length, Object originator) {
                wait_sem.release();
            }

            @Override
            public void dataChecked(long offset, long length) {
            }
        };
        long start_time = SystemTime.getMonotonousTime();
        boolean has_started = false;
        core_file.addListener(info_listener);
        while (download_byte_start < download_byte_end) {
            if (request.isCancelled()) {
                throw (new Exception("request cancelled"));
            }
            // System.out.println( "Request current: " + download_byte_start + " -> " + download_byte_end );
            long now = SystemTime.getMonotonousTime();
            int piece_start = (int) (download_byte_start / piece_size);
            int piece_start_offset = (int) (download_byte_start % piece_size);
            int piece_end = (int) ((download_byte_end - 1) / piece_size);
            int piece_end_offset = (int) ((download_byte_end - 1) % piece_size) + 1;
            // System.out.println( "    piece details: " + piece_start + "/" + piece_start_offset + " -> " + piece_end + "/" + piece_end_offset );
            DiskManagerPiece[] pieces = null;
            DiskManager disk_manager = core_download.getDiskManager();
            if (disk_manager != null) {
                pieces = disk_manager.getPieces();
            }
            long avail_start;
            long avail_end;
            if (pieces == null) {
                if (core_file.getDownloaded() == core_file.getLength()) {
                    avail_start = download_byte_start;
                    avail_end = download_byte_end;
                } else {
                    if (now - start_time < 10000 && !has_started) {
                        wait_sem.reserve(250);
                        continue;
                    }
                    throw (new Exception("download stopped"));
                }
            } else {
                has_started = true;
                if (is_reverse) {
                    long min_done = download_byte_end;
                    for (int i = piece_end; i >= piece_start; i--) {
                        int p_start = i == piece_start ? piece_start_offset : 0;
                        int p_end = i == piece_end ? piece_end_offset : piece_size;
                        DiskManagerPiece piece = pieces[i];
                        boolean[] done = piece.getWritten();
                        if (done == null) {
                            if (piece.isDone()) {
                                min_done = i * (long) piece_size;
                                continue;
                            } else {
                                break;
                            }
                        }
                        int block_size = piece.getBlockSize(0);
                        int first_block = p_start / block_size;
                        int last_block = (p_end - 1) / block_size;
                        for (int j = last_block; j >= first_block; j--) {
                            if (done[j]) {
                                min_done = i * (long) piece_size + j * block_size;
                            } else {
                                break;
                            }
                        }
                    }
                    avail_start = Math.max(download_byte_start, min_done);
                    avail_end = download_byte_end;
                } else {
                    long max_done = download_byte_start;
                    for (int i = piece_start; i <= piece_end; i++) {
                        int p_start = i == piece_start ? piece_start_offset : 0;
                        int p_end = i == piece_end ? piece_end_offset : piece_size;
                        DiskManagerPiece piece = pieces[i];
                        boolean[] done = piece.getWritten();
                        if (done == null) {
                            if (piece.isDone()) {
                                max_done = (i + 1) * (long) piece_size;
                                continue;
                            } else {
                                break;
                            }
                        }
                        int block_size = piece.getBlockSize(0);
                        int first_block = p_start / block_size;
                        int last_block = (p_end - 1) / block_size;
                        for (int j = first_block; j <= last_block; j++) {
                            if (done[j]) {
                                max_done = i * (long) piece_size + (j + 1) * block_size;
                            } else {
                                break;
                            }
                        }
                    }
                    avail_start = download_byte_start;
                    avail_end = Math.min(download_byte_end, max_done);
                }
            }
            // System.out.println( "    avail: " + avail_start + " -> " + avail_end );
            int max_chunk = 128 * 1024;
            if (avail_end > avail_start) {
                long length = avail_end - avail_start;
                if (length > max_chunk) {
                    if (is_reverse) {
                        avail_start = avail_end - max_chunk;
                    } else {
                        avail_end = avail_start + max_chunk;
                    }
                }
                // System.out.println( "got data: " + avail_start + " -> " + avail_end );
                long read_offset = avail_start - core_file_start_byte;
                int read_length = (int) (avail_end - avail_start);
                DirectByteBuffer buffer = core_file.read(read_offset, read_length);
                request.dataAvailable(buffer, read_offset, read_length);
                if (is_reverse) {
                    download_byte_end = avail_start;
                } else {
                    download_byte_start = avail_end;
                }
                continue;
            }
            PEPeerManager pm = core_download.getPeerManager();
            if (pm == null) {
                if (now - start_time < 10000 && !has_started) {
                    wait_sem.reserve(250);
                    continue;
                }
                throw (new Exception("download stopped"));
            } else {
                has_started = true;
            }
            PiecePicker picker = pm.getPiecePicker();
            picker.setReverseBlockOrder(is_reverse);
            int hint_piece;
            int hint_offset;
            int hint_length;
            if (piece_start == piece_end) {
                hint_piece = piece_start;
                hint_offset = piece_start_offset;
                hint_length = piece_end_offset - piece_start_offset;
            } else {
                if (is_reverse) {
                    hint_piece = piece_end;
                    hint_offset = 0;
                    hint_length = piece_end_offset;
                } else {
                    hint_piece = piece_start;
                    hint_offset = piece_start_offset;
                    hint_length = piece_size - piece_start_offset;
                }
            }
            if (curr_hint_piece == -1) {
                int[] existing = picker.getGlobalRequestHint();
                if (existing != null) {
                    curr_hint_piece = existing[0];
                }
            }
            // System.out.println( "hint: " + hint_piece + "/" + hint_offset + "/" + hint_length + ": curr=" + curr_hint_piece + ", prev=" + prev_hint_piece );
            picker.setGlobalRequestHint(hint_piece, hint_offset, hint_length);
            if (hint_piece != curr_hint_piece) {
                prev_hint_piece = curr_hint_piece;
                curr_hint_piece = hint_piece;
            }
            if (prev_hint_piece != -1) {
                clearHint(pm, prev_hint_piece);
            }
            wait_sem.reserve(250);
        }
    } catch (Throwable e) {
        request.failed(e);
    } finally {
        PEPeerManager pm = core_download.getPeerManager();
        if (pm != null) {
            PiecePicker picker = pm.getPiecePicker();
            if (picker != null) {
                picker.setReverseBlockOrder(false);
                picker.setGlobalRequestHint(-1, 0, 0);
                if (curr_hint_piece != -1) {
                    clearHint(pm, curr_hint_piece);
                }
            }
        }
        if (info_listener != null) {
            core_file.removeListener(info_listener);
        }
    }
}