github.com/matrixorigin/matrixone@v0.7.0/pkg/vm/engine/tae/txn/txnimpl/appendcmd.go (about)

     1  // Copyright 2021 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package txnimpl
    16  
    17  import (
    18  	"bytes"
    19  	"encoding/binary"
    20  	"fmt"
    21  	"io"
    22  
    23  	"github.com/matrixorigin/matrixone/pkg/container/types"
    24  
    25  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/common"
    26  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/iface/txnif"
    27  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/txn/txnbase"
    28  )
    29  
    30  const (
    31  	CmdAppend int16 = txnbase.CmdCustomized + iota
    32  )
    33  
    34  func init() {
    35  	txnif.RegisterCmdFactory(CmdAppend, func(int16) txnif.TxnCmd {
    36  		return NewEmptyAppendCmd()
    37  	})
    38  }
    39  
    40  type AppendCmd struct {
    41  	*txnbase.BaseCustomizedCmd
    42  	*txnbase.ComposedCmd
    43  	Infos []*appendInfo
    44  	Ts    types.TS
    45  	Node  InsertNode
    46  }
    47  
    48  func NewEmptyAppendCmd() *AppendCmd {
    49  	cmd := &AppendCmd{
    50  		ComposedCmd: txnbase.NewComposedCmd(),
    51  	}
    52  	cmd.BaseCustomizedCmd = txnbase.NewBaseCustomizedCmd(0, cmd)
    53  	return cmd
    54  }
    55  
    56  func NewAppendCmd(id uint32, node InsertNode) *AppendCmd {
    57  	impl := &AppendCmd{
    58  		ComposedCmd: txnbase.NewComposedCmd(),
    59  		Node:        node,
    60  		Infos:       node.GetAppends(),
    61  	}
    62  	impl.BaseCustomizedCmd = txnbase.NewBaseCustomizedCmd(id, impl)
    63  	return impl
    64  }
    65  func (c *AppendCmd) Desc() string {
    66  	s := fmt.Sprintf("CmdName=InsertNode;ID=%d;TS=%d;Dests=[", c.ID, c.Ts)
    67  	for _, info := range c.Infos {
    68  		s = fmt.Sprintf("%s %s", s, info.Desc())
    69  	}
    70  	s = fmt.Sprintf("%s];\n%s", s, c.ComposedCmd.ToDesc("\t\t"))
    71  	return s
    72  }
    73  func (c *AppendCmd) String() string {
    74  	s := fmt.Sprintf("CmdName=InsertNode;ID=%d;TS=%d;Dests=[", c.ID, c.Ts)
    75  	for _, info := range c.Infos {
    76  		s = fmt.Sprintf("%s%s", s, info.String())
    77  	}
    78  	s = fmt.Sprintf("%s];\n%s", s, c.ComposedCmd.ToString("\t\t"))
    79  	return s
    80  }
    81  func (c *AppendCmd) VerboseString() string {
    82  	s := fmt.Sprintf("CmdName=InsertNode;ID=%d;TS=%d;Dests=", c.ID, c.Ts)
    83  	for _, info := range c.Infos {
    84  		s = fmt.Sprintf("%s%s", s, info.String())
    85  	}
    86  	s = fmt.Sprintf("%s];\n%s", s, c.ComposedCmd.ToVerboseString("\t\t"))
    87  	return s
    88  }
    89  func (c *AppendCmd) Close()         { c.ComposedCmd.Close() }
    90  func (c *AppendCmd) GetType() int16 { return CmdAppend }
    91  func (c *AppendCmd) WriteTo(w io.Writer) (n int64, err error) {
    92  	if err = binary.Write(w, binary.BigEndian, c.GetType()); err != nil {
    93  		return
    94  	}
    95  	if err = binary.Write(w, binary.BigEndian, c.ID); err != nil {
    96  		return
    97  	}
    98  	if err = binary.Write(w, binary.BigEndian, uint32(len(c.Infos))); err != nil {
    99  		return
   100  	}
   101  	var sn int64
   102  	n = 10
   103  	for _, info := range c.Infos {
   104  		if sn, err = info.WriteTo(w); err != nil {
   105  			return
   106  		}
   107  		n += sn
   108  	}
   109  	sn, err = c.ComposedCmd.WriteTo(w)
   110  	n += sn
   111  	if err != nil {
   112  		return n, err
   113  	}
   114  	if err = binary.Write(w, binary.BigEndian, c.Node.GetTxn().GetPrepareTS()); err != nil {
   115  		return
   116  	}
   117  	n += 16
   118  	return
   119  }
   120  
   121  func (c *AppendCmd) ReadFrom(r io.Reader) (n int64, err error) {
   122  	if err = binary.Read(r, binary.BigEndian, &c.ID); err != nil {
   123  		return
   124  	}
   125  	length := uint32(0)
   126  	if err = binary.Read(r, binary.BigEndian, &length); err != nil {
   127  		return
   128  	}
   129  	var sn int64
   130  	n = 8
   131  	c.Infos = make([]*appendInfo, length)
   132  	for i := 0; i < int(length); i++ {
   133  		c.Infos[i] = &appendInfo{dest: &common.ID{}}
   134  		if sn, err = c.Infos[i].ReadFrom(r); err != nil {
   135  			return
   136  		}
   137  		n += sn
   138  	}
   139  	cc, sn, err := txnbase.BuildCommandFrom(r)
   140  	c.ComposedCmd = cc.(*txnbase.ComposedCmd)
   141  	n += sn
   142  	if err != nil {
   143  		return n, err
   144  	}
   145  	if err = binary.Read(r, binary.BigEndian, &c.Ts); err != nil {
   146  		return
   147  	}
   148  	n += 16
   149  	return
   150  }
   151  
   152  func (c *AppendCmd) Marshal() (buf []byte, err error) {
   153  	var bbuf bytes.Buffer
   154  	if _, err = c.WriteTo(&bbuf); err != nil {
   155  		return
   156  	}
   157  	buf = bbuf.Bytes()
   158  	return
   159  }
   160  
   161  func (c *AppendCmd) Unmarshal(buf []byte) error {
   162  	bbuf := bytes.NewBuffer(buf)
   163  	_, err := c.ReadFrom(bbuf)
   164  	return err
   165  }