github.com/matrixorigin/matrixone@v0.7.0/pkg/vm/engine/tae/tables/txnentries/compactblkcmd.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 txnentries
    16  
    17  import (
    18  	"bytes"
    19  	"encoding/binary"
    20  	"fmt"
    21  	"io"
    22  
    23  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/common"
    24  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/iface/txnif"
    25  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/txn/txnbase"
    26  )
    27  
    28  type compactBlockCmd struct {
    29  	txnbase.BaseCmd
    30  	from *common.ID
    31  	to   *common.ID
    32  	txn  txnif.AsyncTxn
    33  	id   uint32
    34  }
    35  
    36  func newCompactBlockCmd(from, to *common.ID, txn txnif.AsyncTxn, id uint32) *compactBlockCmd {
    37  	return &compactBlockCmd{
    38  		txn:  txn,
    39  		from: from,
    40  		to:   to,
    41  		id:   id,
    42  	}
    43  }
    44  func (cmd *compactBlockCmd) GetType() int16 { return CmdCompactBlock }
    45  func (cmd *compactBlockCmd) WriteTo(w io.Writer) (n int64, err error) {
    46  	if err = binary.Write(w, binary.BigEndian, CmdCompactBlock); err != nil {
    47  		return
    48  	}
    49  	if err = binary.Write(w, binary.BigEndian, cmd.id); err != nil {
    50  		return
    51  	}
    52  	if err = binary.Write(w, binary.BigEndian, cmd.from.TableID); err != nil {
    53  		return
    54  	}
    55  	if err = binary.Write(w, binary.BigEndian, cmd.from.SegmentID); err != nil {
    56  		return
    57  	}
    58  	if err = binary.Write(w, binary.BigEndian, cmd.from.BlockID); err != nil {
    59  		return
    60  	}
    61  
    62  	if err = binary.Write(w, binary.BigEndian, cmd.to.TableID); err != nil {
    63  		return
    64  	}
    65  	if err = binary.Write(w, binary.BigEndian, cmd.to.SegmentID); err != nil {
    66  		return
    67  	}
    68  	if err = binary.Write(w, binary.BigEndian, cmd.to.BlockID); err != nil {
    69  		return
    70  	}
    71  	n = 2 + 4 + 8 + 8 + 8 + 8 + 8 + 8
    72  	return
    73  }
    74  func (cmd *compactBlockCmd) ReadFrom(r io.Reader) (n int64, err error) {
    75  	cmd.from = &common.ID{}
    76  	if err = binary.Read(r, binary.BigEndian, &cmd.id); err != nil {
    77  		return
    78  	}
    79  	if err = binary.Read(r, binary.BigEndian, &cmd.from.TableID); err != nil {
    80  		return
    81  	}
    82  	if err = binary.Read(r, binary.BigEndian, &cmd.from.SegmentID); err != nil {
    83  		return
    84  	}
    85  	if err = binary.Read(r, binary.BigEndian, &cmd.from.BlockID); err != nil {
    86  		return
    87  	}
    88  	cmd.to = &common.ID{}
    89  	if err = binary.Read(r, binary.BigEndian, &cmd.to.TableID); err != nil {
    90  		return
    91  	}
    92  	if err = binary.Read(r, binary.BigEndian, &cmd.to.SegmentID); err != nil {
    93  		return
    94  	}
    95  	if err = binary.Read(r, binary.BigEndian, &cmd.to.BlockID); err != nil {
    96  		return
    97  	}
    98  	n = 4 + 8 + 8 + 8 + 8 + 8 + 8
    99  	return
   100  }
   101  func (cmd *compactBlockCmd) Marshal() (buf []byte, err error) {
   102  	var bbuf bytes.Buffer
   103  	if _, err = cmd.WriteTo(&bbuf); err != nil {
   104  		return
   105  	}
   106  	buf = bbuf.Bytes()
   107  	return
   108  }
   109  func (cmd *compactBlockCmd) Unmarshal(buf []byte) (err error) {
   110  	bbuf := bytes.NewBuffer(buf)
   111  	_, err = cmd.ReadFrom(bbuf)
   112  	return
   113  }
   114  func (cmd *compactBlockCmd) Desc() string {
   115  	return fmt.Sprintf("CmdName=CPCT;CSN=%d;From=%s;To=%s", cmd.id, cmd.from.BlockString(), cmd.to.BlockString())
   116  }
   117  func (cmd *compactBlockCmd) String() string {
   118  	return fmt.Sprintf("CmdName=CPCT;CSN=%d;From=%s;To=%s", cmd.id, cmd.from.BlockString(), cmd.to.BlockString())
   119  }
   120  func (cmd *compactBlockCmd) VerboseString() string {
   121  	return fmt.Sprintf("CmdName=CPCT;CSN=%d;From=%s;To=%s", cmd.id, cmd.from.BlockString(), cmd.to.BlockString())
   122  }
   123  func (cmd *compactBlockCmd) ApplyCommit()                  {}
   124  func (cmd *compactBlockCmd) ApplyRollback()                {}
   125  func (cmd *compactBlockCmd) SetReplayTxn(_ txnif.AsyncTxn) {}