github.com/matrixorigin/matrixone@v0.7.0/pkg/vm/engine/tae/model/pages.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 model
    16  
    17  import (
    18  	"bytes"
    19  	"fmt"
    20  	"time"
    21  
    22  	"github.com/matrixorigin/matrixone/pkg/container/types"
    23  	"github.com/matrixorigin/matrixone/pkg/logutil"
    24  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/common"
    25  )
    26  
    27  type HashPageTable = TransferTable[*TransferHashPage]
    28  
    29  type TransferHashPage struct {
    30  	common.RefHelper
    31  	bornTS  time.Time
    32  	id      *common.ID
    33  	hashmap map[uint32]types.Rowid
    34  }
    35  
    36  func NewTransferHashPage(id *common.ID, ts time.Time) *TransferHashPage {
    37  	page := &TransferHashPage{
    38  		bornTS:  ts,
    39  		id:      id,
    40  		hashmap: make(map[uint32]types.Rowid),
    41  	}
    42  	page.OnZeroCB = page.Close
    43  	return page
    44  }
    45  
    46  func (page *TransferHashPage) ID() *common.ID    { return page.id }
    47  func (page *TransferHashPage) BornTS() time.Time { return page.bornTS }
    48  
    49  func (page *TransferHashPage) TTL(now time.Time, ttl time.Duration) bool {
    50  	return now.After(page.bornTS.Add(ttl))
    51  }
    52  
    53  func (page *TransferHashPage) Close() {
    54  	logutil.Infof("Closing %s", page.String())
    55  	page.hashmap = make(map[uint32]types.Rowid)
    56  }
    57  
    58  func (page *TransferHashPage) String() string {
    59  	var w bytes.Buffer
    60  	_, _ = w.WriteString(fmt.Sprintf("hashpage[%s][%s][Len=%d]",
    61  		page.id.BlockString(),
    62  		page.bornTS.String(),
    63  		len(page.hashmap)))
    64  	return w.String()
    65  }
    66  
    67  func (page *TransferHashPage) Pin() *common.PinnedItem[*TransferHashPage] {
    68  	page.Ref()
    69  	return &common.PinnedItem[*TransferHashPage]{
    70  		Val: page,
    71  	}
    72  }
    73  
    74  func (page *TransferHashPage) Train(from uint32, to types.Rowid) {
    75  	page.hashmap[from] = to
    76  }
    77  
    78  func (page *TransferHashPage) Transfer(from uint32) (dest types.Rowid, ok bool) {
    79  	dest, ok = page.hashmap[from]
    80  	return
    81  }