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

Example 41 with RowDataPacket

use of io.mycat.net.mysql.RowDataPacket in project Mycat_plus by coderczp.

the class ShowVersion method execute.

public static void execute(ManagerConnection 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(Versions.SERVER_VERSION);
    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);
    // write buffer
    c.write(buffer);
}

Example 42 with RowDataPacket

use of io.mycat.net.mysql.RowDataPacket in project Mycat_plus by coderczp.

the class MyRowOutPutDataHandler method onRowData.

@Override
public boolean onRowData(String dataNode, byte[] rowData) {
    RowDataPacket rowDataPkg = ResultSetUtil.parseRowData(rowData, bfields);
    // 获取Id字段，
    String id = ByteUtil.getString(rowDataPkg.fieldValues.get(0));
    byte[] bname = rowDataPkg.fieldValues.get(1);
    // 查找ID对应的A表的记录
    byte[] arow = arows.remove(id);
    rowDataPkg = ResultSetUtil.parseRowData(arow, afields);
    // 设置b.name 字段
    rowDataPkg.add(bname);
    ctx.writeRow(rowDataPkg);
    // EngineCtx.LOGGER.info("out put row ");
    return false;
}

Example 43 with RowDataPacket

use of io.mycat.net.mysql.RowDataPacket in project Mycat_plus by coderczp.

the class ShowVariables method getRow.

private static RowDataPacket getRow(String name, String value, String charset) {
    RowDataPacket row = new RowDataPacket(FIELD_COUNT);
    row.add(StringUtil.encode(name, charset));
    row.add(StringUtil.encode(value, charset));
    return row;
}

Example 44 with RowDataPacket

use of io.mycat.net.mysql.RowDataPacket in project Mycat_plus by coderczp.

the class MultiNodeQueryHandler method outputMergeResult.

public void outputMergeResult(final ServerConnection source, final byte[] eof, List<RowDataPacket> results) {
    try {
        lock.lock();
        ByteBuffer buffer = session.getSource().allocate();
        final RouteResultset rrs = this.dataMergeSvr.getRrs();
        // 处理limit语句
        int start = rrs.getLimitStart();
        int end = start + rrs.getLimitSize();
        if (start < 0) {
            start = 0;
        }
        if (rrs.getLimitSize() < 0) {
            end = results.size();
        }
        // }
        if (end > results.size()) {
            end = results.size();
        }
        if (prepared) {
            for (int i = start; i < end; i++) {
                RowDataPacket row = results.get(i);
                BinaryRowDataPacket binRowDataPk = new BinaryRowDataPacket();
                binRowDataPk.read(fieldPackets, row);
                binRowDataPk.packetId = ++packetId;
                // binRowDataPk.write(source);
                buffer = binRowDataPk.write(buffer, session.getSource(), true);
            }
        } else {
            for (int i = start; i < end; i++) {
                RowDataPacket row = results.get(i);
                row.packetId = ++packetId;
                buffer = row.write(buffer, source, true);
            }
        }
        eof[3] = ++packetId;
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("last packet id:" + packetId);
        }
        source.write(source.writeToBuffer(eof, buffer));
    } catch (Exception e) {
        handleDataProcessException(e);
    } finally {
        lock.unlock();
        dataMergeSvr.clear();
    }
}

Example 45 with RowDataPacket

use of io.mycat.net.mysql.RowDataPacket in project Mycat_plus by coderczp.

the class ResultSetUtil method getColumnValAsString.

public static String getColumnValAsString(byte[] row, List<byte[]> fieldValues, int columnIndex) {
    RowDataPacket rowDataPkg = new RowDataPacket(fieldValues.size());
    rowDataPkg.read(row);
    byte[] columnData = rowDataPkg.fieldValues.get(columnIndex);
    // columnData 为空时,直接返回null
    return columnData == null ? null : new String(columnData);
}