Examples with EOFPacket io.mycat.net.mysql.EOFPacket used on opensource projects

Example 71 with EOFPacket

use of io.mycat.net.mysql.EOFPacket in project Mycat-Server by MyCATApache.

the class SelectUser method response.

public static void response(ServerConnection c) {
    if (MycatServer.getInstance().isOnline()) {
        ByteBuffer buffer = c.allocate();
        buffer = header.write(buffer, c, true);
        for (FieldPacket field : fields) {
            buffer = field.write(buffer, c, true);
        }
        buffer = eof.write(buffer, c, true);
        byte packetId = eof.packetId;
        RowDataPacket row = new RowDataPacket(FIELD_COUNT);
        row.add(getUser(c));
        row.packetId = ++packetId;
        buffer = row.write(buffer, c, true);
        EOFPacket lastEof = new EOFPacket();
        lastEof.packetId = ++packetId;
        buffer = lastEof.write(buffer, c, true);
        c.write(buffer);
    } else {
        error.write(c);
    }
}

Example 72 with EOFPacket

use of io.mycat.net.mysql.EOFPacket in project Mycat-Server by MyCATApache.

the class SelectVersion method response.

public static void response(ServerConnection c) {
    ByteBuffer buffer = c.allocate();
    buffer = header.write(buffer, c, true);
    for (FieldPacket field : fields) {
        buffer = field.write(buffer, c, true);
    }
    buffer = eof.write(buffer, c, true);
    byte packetId = eof.packetId;
    RowDataPacket row = new RowDataPacket(FIELD_COUNT);
    row.add(Versions.SERVER_VERSION);
    row.packetId = ++packetId;
    buffer = row.write(buffer, c, true);
    EOFPacket lastEof = new EOFPacket();
    lastEof.packetId = ++packetId;
    buffer = lastEof.write(buffer, c, true);
    c.write(buffer);
}

Example 73 with EOFPacket

use of io.mycat.net.mysql.EOFPacket in project Mycat-Server by MyCATApache.

the class DataMergeService method run.

@Override
public void run() {
    // @since 2016-03-23
    if (!running.compareAndSet(false, true)) {
        return;
    }
    // eof handler has been placed to "if (pack == END_FLAG_PACK){}" in for-statement
    // @author Uncle-pan
    // @since 2016-03-23
    boolean nulpack = false;
    try {
        // loop-on-packs
        for (; ; ) {
            final PackWraper pack = packs.poll();
            // @since 2016-03-23
            if (pack == null) {
                nulpack = true;
                break;
            }
            // eof: handling eof pack and exit
            if (pack == END_FLAG_PACK) {
                final int warningCount = 0;
                final EOFPacket eofp = new EOFPacket();
                final ByteBuffer eof = ByteBuffer.allocate(9);
                BufferUtil.writeUB3(eof, eofp.calcPacketSize());
                eof.put(eofp.packetId);
                eof.put(eofp.fieldCount);
                BufferUtil.writeUB2(eof, warningCount);
                BufferUtil.writeUB2(eof, eofp.status);
                final ServerConnection source = multiQueryHandler.getSession().getSource();
                final byte[] array = eof.array();
                multiQueryHandler.outputMergeResult(source, array, getResults(array));
                break;
            }
            // merge: sort-or-group, or simple add
            final RowDataPacket row = new RowDataPacket(fieldCount);
            row.read(pack.rowData);
            if (grouper != null) {
                grouper.addRow(row);
            } else if (sorter != null) {
                if (!sorter.addRow(row)) {
                    canDiscard.put(pack.dataNode, true);
                }
            } else {
                result.get(pack.dataNode).add(row);
            }
        }
    // rof
    } catch (final Exception e) {
        multiQueryHandler.handleDataProcessException(e);
    } finally {
        running.set(false);
    }
    // @since 2016-03-23
    if (nulpack && !packs.isEmpty()) {
        this.run();
    }
}

Example 74 with EOFPacket

use of io.mycat.net.mysql.EOFPacket in project Mycat-Server by MyCATApache.

the class DataNodeMergeManager method run.

@Override
public void run() {
    if (!running.compareAndSet(false, true)) {
        return;
    }
    boolean nulpack = false;
    try {
        for (; ; ) {
            final PackWraper pack = packs.poll();
            if (pack == null) {
                nulpack = true;
                break;
            }
            if (pack == END_FLAG_PACK) {
                /**
                     * 最后一个节点datenode发送了row eof packet说明了整个
                     * 分片数据全部接收完成，进而将结果集全部发给你Mycat 客户端
                     */
                final int warningCount = 0;
                final EOFPacket eofp = new EOFPacket();
                final ByteBuffer eof = ByteBuffer.allocate(9);
                BufferUtil.writeUB3(eof, eofp.calcPacketSize());
                eof.put(eofp.packetId);
                eof.put(eofp.fieldCount);
                BufferUtil.writeUB2(eof, warningCount);
                BufferUtil.writeUB2(eof, eofp.status);
                final ServerConnection source = multiQueryHandler.getSession().getSource();
                final byte[] array = eof.array();
                Iterator<UnsafeRow> iters = null;
                if (unsafeRowGrouper != null) {
                    /**
                         * group by里面需要排序情况
                         */
                    if (globalSorter != null) {
                        iters = unsafeRowGrouper.getResult(globalSorter);
                    } else {
                        iters = unsafeRowGrouper.getResult(globalMergeResult);
                    }
                } else if (globalSorter != null) {
                    iters = globalSorter.sort();
                } else if (!isStreamOutputResult) {
                    iters = globalMergeResult.sort();
                }
                if (iters != null)
                    multiQueryHandler.outputMergeResult(source, array, iters);
                if (unsafeRowGrouper != null) {
                    unsafeRowGrouper.free();
                    unsafeRowGrouper = null;
                }
                if (globalSorter != null) {
                    globalSorter.cleanupResources();
                    globalSorter = null;
                }
                if (globalMergeResult != null) {
                    globalMergeResult.cleanupResources();
                    globalMergeResult = null;
                }
                break;
            }
            unsafeRow = new UnsafeRow(fieldCount);
            bufferHolder = new BufferHolder(unsafeRow, 0);
            unsafeRowWriter = new UnsafeRowWriter(bufferHolder, fieldCount);
            bufferHolder.reset();
            /**
                 *构造一行row，将对应的col填充.
                 */
            MySQLMessage mm = new MySQLMessage(pack.rowData);
            mm.readUB3();
            mm.read();
            for (int i = 0; i < fieldCount; i++) {
                byte[] colValue = mm.readBytesWithLength();
                if (colValue != null)
                    unsafeRowWriter.write(i, colValue);
                else
                    unsafeRow.setNullAt(i);
            }
            unsafeRow.setTotalSize(bufferHolder.totalSize());
            if (unsafeRowGrouper != null) {
                unsafeRowGrouper.addRow(unsafeRow);
            } else if (globalSorter != null) {
                globalSorter.insertRow(unsafeRow);
            } else {
                globalMergeResult.insertRow(unsafeRow);
            }
            unsafeRow = null;
            bufferHolder = null;
            unsafeRowWriter = null;
        }
    } catch (final Exception e) {
        multiQueryHandler.handleDataProcessException(e);
    } finally {
        running.set(false);
        if (nulpack && !packs.isEmpty()) {
            this.run();
        }
    }
}

Example 75 with EOFPacket

use of io.mycat.net.mysql.EOFPacket in project Mycat-Server by MyCATApache.

the class SelectVersionComment method response.

public static void response(ServerConnection c) {
    ByteBuffer buffer = c.allocate();
    // write header
    buffer = header.write(buffer, c, true);
    // write fields
    for (FieldPacket field : fields) {
        buffer = field.write(buffer, c, true);
    }
    // write eof
    buffer = eof.write(buffer, c, true);
    // write rows
    byte packetId = eof.packetId;
    RowDataPacket row = new RowDataPacket(FIELD_COUNT);
    row.add(VERSION_COMMENT);
    row.packetId = ++packetId;
    buffer = row.write(buffer, c, true);
    // write last eof
    EOFPacket lastEof = new EOFPacket();
    lastEof.packetId = ++packetId;
    buffer = lastEof.write(buffer, c, true);
    // post write
    c.write(buffer);
}