github.com/matrixorigin/matrixone@v0.7.0/pkg/vm/engine/tae/tables/evictable/utils.go (about)

     1  // Copyright 2022 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 evictable
    16  
    17  import (
    18  	"bytes"
    19  	"fmt"
    20  	"time"
    21  
    22  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/buffer/base"
    23  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/common"
    24  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/containers"
    25  )
    26  
    27  const (
    28  	ConstPinDuration = 5 * time.Second
    29  )
    30  
    31  func EncodeColMetaKey(idx uint16, metaloc string) string {
    32  	return fmt.Sprintf("colMeta-%d-%s", idx, metaloc)
    33  }
    34  
    35  func EncodeColBfKey(idx uint16, metaloc string) string {
    36  	return fmt.Sprintf("colBf-%d-%s", idx, metaloc)
    37  }
    38  
    39  func EncodeColDataKey(idx uint16, metaloc string) string {
    40  	return fmt.Sprintf("colData-%d-%s", idx, metaloc)
    41  }
    42  
    43  func EncodeDeltaDataKey(idx uint16, deltaloc string) string {
    44  	return fmt.Sprintf("deltaData-%d-%s", idx, deltaloc)
    45  }
    46  
    47  func EncodeDeltaMetaKey(deltaloc string) string {
    48  	return fmt.Sprintf("deltaMeta-%s", deltaloc)
    49  }
    50  
    51  type EvictableNodeFactory = func() (base.INode, error)
    52  
    53  func PinEvictableNode(mgr base.INodeManager, key string, factory EvictableNodeFactory) (base.INodeHandle, error) {
    54  	var h base.INodeHandle
    55  	var err error
    56  	h, err = mgr.TryPinByKey(key, ConstPinDuration)
    57  	if err == base.ErrNotFound {
    58  		node, newerr := factory()
    59  		if newerr != nil {
    60  			return nil, newerr
    61  		}
    62  		// Ignore duplicate node and TODO: maybe handle no space
    63  		mgr.Add(node)
    64  		h, err = mgr.TryPinByKey(key, ConstPinDuration)
    65  	}
    66  	return h, err
    67  }
    68  
    69  func copyVector(data containers.Vector, buf *bytes.Buffer) containers.Vector {
    70  	if buf != nil {
    71  		return containers.CloneWithBuffer(data, buf, common.DefaultAllocator)
    72  	} else {
    73  		return data.CloneWindow(0, data.Length(), common.DefaultAllocator)
    74  	}
    75  }