mirror of
https://github.com/featurebasedb/featurebase.git
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94 lines
2.2 KiB
Go
94 lines
2.2 KiB
Go
// Copyright 2017 Pilosa Corp.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ctl
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import (
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"context"
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"io"
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"os"
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"github.com/pilosa/pilosa"
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"github.com/pilosa/pilosa/server"
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"github.com/pkg/errors"
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)
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// BackupCommand represents a command for backing up a view.
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type BackupCommand struct {
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// Destination host and port.
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Host string
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// Name of the index, frame, view to backup.
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Index string
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Frame string
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View string
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// Output file to write to.
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Path string
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// Standard input/output
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*pilosa.CmdIO
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TLS server.TLSConfig
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}
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// NewBackupCommand returns a new instance of BackupCommand.
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func NewBackupCommand(stdin io.Reader, stdout, stderr io.Writer) *BackupCommand {
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return &BackupCommand{
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CmdIO: pilosa.NewCmdIO(stdin, stdout, stderr),
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}
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}
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// Run executes the backup.
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func (cmd *BackupCommand) Run(ctx context.Context) error {
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// Validate arguments.
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if cmd.Path == "" {
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return errors.New("output file required")
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}
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// Create a client to the server.
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client, err := CommandClient(cmd)
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if err != nil {
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return errors.Wrap(err, "creating client")
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}
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// Open output file.
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f, err := os.Create(cmd.Path)
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if err != nil {
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return errors.Wrap(err, "creating file")
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}
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defer f.Close()
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// Begin streaming backup.
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if err := client.BackupTo(ctx, f, cmd.Index, cmd.Frame, cmd.View); err != nil {
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return errors.Wrap(err, "backing up")
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}
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// Sync & close file to ensure durability.
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if err := f.Sync(); err != nil {
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return errors.Wrap(err, "syncing")
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} else if err = f.Close(); err != nil {
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return errors.Wrap(err, "closing file")
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}
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return nil
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}
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func (cmd *BackupCommand) TLSHost() string {
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return cmd.Host
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}
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func (cmd *BackupCommand) TLSConfiguration() server.TLSConfig {
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return cmd.TLS
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}
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