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folder-size-cache.go
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folder-size-cache.go
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/*
* Copyright (c) 2019-2021. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pydio Cells is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
package index
import (
"context"
"fmt"
"sync"
"github.com/pydio/cells/v4/common/proto/tree"
"github.com/pydio/cells/v4/common/sql"
"github.com/pydio/cells/v4/common/utils/mtree"
)
var (
folderSizeCache = make(map[string]int64)
folderSizeLock = &sync.RWMutex{}
)
// FolderSizeCacheSQL implementation
type FolderSizeCacheSQL struct {
DAO
}
func init() {
queries["childrenSize"] = func(dao sql.DAO, mpathes ...string) (string, []interface{}) {
sub, args := getMPathLike([]byte(mpathes[0]))
return fmt.Sprintf(`
select sum(size)
FROM %%PREFIX%%_idx_tree
WHERE %s AND level >= ? AND leaf=1`, sub), args
}
}
// NewFolderSizeCacheDAO provides a middleware implementation of the index sql dao that removes duplicate entries of the .pydio file that have the same etag at the same level
func NewFolderSizeCacheDAO(dao DAO) DAO {
//return dao
return &FolderSizeCacheSQL{
dao,
}
}
// GetNode from path
func (dao *FolderSizeCacheSQL) GetNode(path mtree.MPath) (*mtree.TreeNode, error) {
node, err := dao.DAO.GetNode(path)
if err != nil {
return nil, err
}
if node != nil && !node.IsLeaf() {
dao.folderSize(node)
}
return node, nil
}
// GetNodeByUUID returns the node stored with the unique uuid
func (dao *FolderSizeCacheSQL) GetNodeByUUID(uuid string) (*mtree.TreeNode, error) {
node, err := dao.DAO.GetNodeByUUID(uuid)
if err != nil {
return nil, err
}
if node != nil && !node.IsLeaf() {
dao.folderSize(node)
}
return node, nil
}
// GetNodeChildren List
func (dao *FolderSizeCacheSQL) GetNodeChildren(ctx context.Context, path mtree.MPath, filter ...*tree.MetaFilter) chan interface{} {
c := make(chan interface{})
go func() {
defer close(c)
cc := dao.DAO.GetNodeChildren(ctx, path, filter...)
for obj := range cc {
if node, ok := obj.(*mtree.TreeNode); ok {
if node != nil && !node.IsLeaf() {
dao.folderSize(node)
}
}
select {
case c <- obj:
case <-ctx.Done():
return
}
}
}()
return c
}
// GetNodeTree List from the path
func (dao *FolderSizeCacheSQL) GetNodeTree(ctx context.Context, path mtree.MPath, filter ...*tree.MetaFilter) chan interface{} {
c := make(chan interface{})
go func() {
defer close(c)
cc := dao.DAO.GetNodeTree(ctx, path, filter...)
for obj := range cc {
if node, ok := obj.(*mtree.TreeNode); ok {
if node != nil && !node.IsLeaf() {
dao.folderSize(node)
}
}
select {
case c <- obj:
case <-ctx.Done():
return
}
}
}()
return c
}
func (dao *FolderSizeCacheSQL) Path(strpath string, create bool, reqNode ...*tree.Node) (mtree.MPath, []*mtree.TreeNode, error) {
mpath, nodes, err := dao.DAO.Path(strpath, create, reqNode...)
if create {
go dao.invalidateMPathHierarchy(mpath, -1)
}
return mpath, nodes, err
}
// AddNode adds a node in the tree.
func (dao *FolderSizeCacheSQL) AddNode(node *mtree.TreeNode) error {
dao.invalidateMPathHierarchy(node.MPath, -1)
return dao.DAO.AddNode(node)
}
// SetNode updates a node, including its tree position
func (dao *FolderSizeCacheSQL) SetNode(node *mtree.TreeNode) error {
dao.invalidateMPathHierarchy(node.MPath, -1)
return dao.DAO.SetNode(node)
}
// DelNode removes a node from the tree
func (dao *FolderSizeCacheSQL) DelNode(node *mtree.TreeNode) error {
dao.invalidateMPathHierarchy(node.MPath, -1)
return dao.DAO.DelNode(node)
}
// MoveNodeTree move all the nodes belonging to a tree by calculating the new mpathes
func (dao *FolderSizeCacheSQL) MoveNodeTree(nodeFrom *mtree.TreeNode, nodeTo *mtree.TreeNode) error {
root := nodeTo.MPath.CommonRoot(nodeFrom.MPath)
dao.invalidateMPathHierarchy(nodeTo.MPath, len(root))
dao.invalidateMPathHierarchy(nodeFrom.MPath, len(root))
return dao.DAO.MoveNodeTree(nodeFrom, nodeTo)
}
func (dao *FolderSizeCacheSQL) GetSQLDAO() sql.DAO {
return dao.DAO.GetSQLDAO()
}
func (dao *FolderSizeCacheSQL) invalidateMPathHierarchy(mpath mtree.MPath, level int) {
parents := mpath.Parents()
if level > -1 {
parents = mpath.Parents()[level:]
}
folderSizeLock.Lock()
delete(folderSizeCache, mpath.String())
folderSizeLock.Unlock()
for _, p := range parents {
folderSizeLock.Lock()
delete(folderSizeCache, p.String())
folderSizeLock.Unlock()
}
}
// Compute sizes from children files - Does not handle lock, should be
// used by other functions handling lock
func (dao *FolderSizeCacheSQL) folderSize(node *mtree.TreeNode) {
mpath := node.MPath.String()
folderSizeLock.RLock()
size, ok := folderSizeCache[mpath]
folderSizeLock.RUnlock()
if ok {
node.Size = size
return
}
if stmt, args, e := dao.GetSQLDAO().GetStmtWithArgs("childrenSize", mpath); e == nil {
row := stmt.QueryRow(append(args, len(node.MPath)+1)...)
if row != nil {
var size int64
if er := row.Scan(&size); er == nil {
node.Size = size
folderSizeLock.Lock()
folderSizeCache[mpath] = size
folderSizeLock.Unlock()
}
}
}
}