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tree-patch-validate.go
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/
tree-patch-validate.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 merger
import (
"context"
"sync"
"time"
"github.com/pkg/errors"
"go.uber.org/zap"
"github.com/pydio/cells/common/log"
"github.com/pydio/cells/common/sync/model"
)
// Validate tries to match the status of the target to verify that all operations are correctly applied.
func (t *TreePatch) Validate(ctx context.Context) error {
wg := &sync.WaitGroup{}
wg.Add(2)
var e1, e2 error
go func() {
e1 = t.validateEndpoint(ctx, t.Target())
wg.Done()
}()
go func() {
e2 = t.validateEndpoint(ctx, t.Source())
wg.Done()
}()
wg.Wait()
if e1 != nil || e2 != nil {
if e1 != nil {
log.Logger(ctx).Error("Could not validate changes on target", zap.Error(e1))
}
if e2 != nil {
log.Logger(ctx).Error("Could not validate changes on source", zap.Error(e2))
}
e := errors.New("errors detected while validating patch")
t.Status(model.NewProcessingStatus("Errors detected while validating patch").SetError(e).SetProgress(1))
return e
} else {
t.Status(model.NewProcessingStatus("Modification correctly reported").SetProgress(1))
return nil
}
}
func (t *TreePatch) validateEndpoint(ctx context.Context, target model.Endpoint) error {
if syncSource, ok := target.(model.CachedBranchProvider); ok {
// Find highest modified path
branches := t.BranchesWithOperations(target)
if len(branches) == 0 {
return nil
}
// If we are validating with a cache, it's probably a remote server, and it has probably a small delay
// => wait before first try
<-time.After(1 * time.Second)
t.Status(model.NewProcessingStatus("Validating modifications have been correctly reported...").SetProgress(1))
return model.RetryWithCtx(ctx, func(retry int) error {
return t.validateWithPreLoad(ctx, branches, syncSource)
}, 6*time.Second, 4*time.Minute)
} else {
t.Status(model.NewProcessingStatus("Validating modifications have been correctly reported...").SetProgress(1))
return t.validateWalking(ctx, target.GetEndpointInfo().URI, target)
}
}
func (t *TreePatch) validateWithPreLoad(ctx context.Context, branches []string, target model.CachedBranchProvider) error {
// Load remote tree in memory
memDB := target.GetCachedBranches(ctx, branches...)
return t.validateWalking(ctx, target.GetEndpointInfo().URI, memDB)
}
func (t *TreePatch) validateWalking(ctx context.Context, targetUri string, target model.Endpoint) error {
var errs []error
var valid int
t.WalkOperations([]OperationType{}, func(operation Operation) {
if !operation.IsProcessed() || operation.Target().GetEndpointInfo().URI != targetUri {
return
}
if e := t.validateOperation(ctx, operation, target); e != nil {
log.Logger(ctx).Debug(
"Operation not yet validated",
zap.String("type", operation.Type().String()),
zap.String("path", operation.GetRefPath()),
zap.String("error", e.Error()))
errs = append(errs, e)
} else {
valid++
log.Logger(ctx).Debug(
"Operation validated",
zap.String("type", operation.Type().String()),
zap.String("path", operation.GetRefPath()))
}
})
if len(errs) == 0 {
if valid > 0 {
log.Logger(ctx).Info("All operations were validated", zap.Int("count", valid))
}
return nil
} else {
log.Logger(ctx).Info("There are still some operations not validated", zap.Int("count", len(errs)), zap.String("first error", errs[0].Error()))
return errs[0]
}
}
func (t *TreePatch) validateOperation(ctx context.Context, o Operation, target model.Endpoint) error {
switch o.Type() {
case OpCreateFile, OpCreateFolder, OpUpdateFile:
if n, e := target.LoadNode(ctx, o.GetRefPath()); e != nil {
return errors.New("cannot find node " + o.GetRefPath())
} else if (o.Type() == OpUpdateFile || o.Type() == OpCreateFile) && n.Etag != o.GetNode().Etag {
return errors.New("eTag are not similar")
}
case OpDelete:
if n, e := target.LoadNode(ctx, o.GetRefPath()); e == nil && n != nil {
return errors.New("can still find node " + o.GetRefPath())
}
case OpMoveFile, OpMoveFolder:
if n, e := target.LoadNode(ctx, o.GetMoveOriginPath()); e == nil && n != nil {
return errors.New("can still find source " + o.GetMoveOriginPath())
}
if n, e := target.LoadNode(ctx, o.GetRefPath()); e != nil || n == nil {
return errors.New("cannot find target " + o.GetRefPath())
}
default:
return nil
}
return nil
}