github.com/matrixorigin/matrixone@v1.2.0/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  	"io"
    20  
    21  	"github.com/matrixorigin/matrixone/pkg/container/types"
    22  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/common"
    23  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/iface/txnif"
    24  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/txn/txnbase"
    25  )
    26  
    27  type compactBlockCmd struct {
    28  	txnbase.BaseCmd
    29  	from *common.ID
    30  	to   *common.ID
    31  	txn  txnif.AsyncTxn
    32  	id   uint32
    33  }
    34  
    35  func newCompactBlockCmd(from, to *common.ID, txn txnif.AsyncTxn, id uint32) *compactBlockCmd {
    36  	return &compactBlockCmd{
    37  		txn:  txn,
    38  		from: from,
    39  		to:   to,
    40  		id:   id,
    41  	}
    42  }
    43  func (cmd *compactBlockCmd) GetType() uint16 { return IOET_WALTxnCommand_Compact }
    44  func (cmd *compactBlockCmd) WriteTo(w io.Writer) (n int64, err error) {
    45  	typ := cmd.GetType()
    46  	if _, err = w.Write(types.EncodeUint16(&typ)); err != nil {
    47  		return
    48  	}
    49  	n = 2
    50  	ver := IOET_WALTxnCommand_Compact_CurrVer
    51  	if _, err = w.Write(types.EncodeUint16(&ver)); err != nil {
    52  		return
    53  	}
    54  	n = 2
    55  	return
    56  }
    57  func (cmd *compactBlockCmd) ReadFrom(r io.Reader) (n int64, err error) {
    58  	return
    59  }
    60  func (cmd *compactBlockCmd) MarshalBinary() (buf []byte, err error) {
    61  	var bbuf bytes.Buffer
    62  	if _, err = cmd.WriteTo(&bbuf); err != nil {
    63  		return
    64  	}
    65  	buf = bbuf.Bytes()
    66  	return
    67  }
    68  func (cmd *compactBlockCmd) UnmarshalBinary(buf []byte) (err error) {
    69  	bbuf := bytes.NewBuffer(buf)
    70  	_, err = cmd.ReadFrom(bbuf)
    71  	return
    72  }
    73  func (cmd *compactBlockCmd) Desc() string {
    74  	return "CmdName=CPCT"
    75  }
    76  func (cmd *compactBlockCmd) String() string {
    77  	return "CmdName=CPCT"
    78  }
    79  func (cmd *compactBlockCmd) VerboseString() string {
    80  	return "CmdName=CPCT"
    81  }
    82  func (cmd *compactBlockCmd) ApplyCommit()                  {}
    83  func (cmd *compactBlockCmd) ApplyRollback()                {}
    84  func (cmd *compactBlockCmd) SetReplayTxn(_ txnif.AsyncTxn) {}