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restore.go
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restore.go
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// Copyright 2020 The vine Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cli
import (
"net/url"
"github.com/lack-io/cli"
"github.com/pkg/errors"
log "github.com/lack-io/vine/service/logger"
"github.com/lack-io/vine/service/store/cli/snapshot"
)
// Restore is the entrypoint for vine store restore
func Restore(ctx *cli.Context) error {
s, err := makeStore(ctx)
if err != nil {
return errors.Wrap(err, "couldn't construct a store")
}
var rs snapshot.Restore
source := ctx.String("source")
if len(source) == 0 {
return errors.New("source flag must be set")
}
u, err := url.Parse(source)
if err != nil {
return errors.Wrap(err, "source is invalid")
}
switch u.Scheme {
case "file":
rs = snapshot.NewFileRestore(snapshot.Source(source))
default:
return errors.Errorf("unsupported source scheme: %s", u.Scheme)
}
err = rs.Init()
if err != nil {
return errors.Wrap(err, "failed to initialise the restorer")
}
recordChan, err := rs.Start()
if err != nil {
return errors.Wrap(err, "couldn't start the restorer")
}
counter := uint64(0)
for r := range recordChan {
err := s.Write(r)
if err != nil {
log.Debugf("couldn't write key %s to store %s", r.Key, s.String())
} else {
counter++
}
}
log.Debugf("Restored %d records", counter)
return nil
}