mirror of
https://github.com/featurebasedb/featurebase.git
synced 2026-08-28 10:54:59 +00:00
113 lines
2.6 KiB
Go
113 lines
2.6 KiB
Go
// Copyright 2017 Pilosa Corp.
|
|
//
|
|
// 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 ctl
|
|
|
|
import (
|
|
"context"
|
|
"io"
|
|
"log"
|
|
"os"
|
|
|
|
"github.com/pilosa/pilosa"
|
|
"github.com/pilosa/pilosa/server"
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
// ExportCommand represents a command for bulk exporting data from a server.
|
|
type ExportCommand struct {
|
|
// Remote host and port.
|
|
Host string
|
|
|
|
// Name of the index & field to export from.
|
|
Index string
|
|
Field string
|
|
|
|
// Filename to export to.
|
|
Path string
|
|
|
|
// Standard input/output
|
|
*pilosa.CmdIO
|
|
|
|
TLS server.TLSConfig
|
|
}
|
|
|
|
// NewExportCommand returns a new instance of ExportCommand.
|
|
func NewExportCommand(stdin io.Reader, stdout, stderr io.Writer) *ExportCommand {
|
|
return &ExportCommand{
|
|
CmdIO: pilosa.NewCmdIO(stdin, stdout, stderr),
|
|
}
|
|
}
|
|
|
|
// Run executes the export.
|
|
func (cmd *ExportCommand) Run(ctx context.Context) error {
|
|
logger := log.New(cmd.Stderr, "", log.LstdFlags)
|
|
|
|
// Validate arguments.
|
|
if cmd.Index == "" {
|
|
return pilosa.ErrIndexRequired
|
|
} else if cmd.Field == "" {
|
|
return pilosa.ErrFieldRequired
|
|
}
|
|
|
|
// Use output file, if specified.
|
|
// Otherwise use STDOUT.
|
|
var w io.Writer = cmd.Stdout
|
|
if cmd.Path != "" {
|
|
f, err := os.Create(cmd.Path)
|
|
if err != nil {
|
|
return errors.Wrap(err, "creating file")
|
|
}
|
|
defer f.Close()
|
|
|
|
w = f
|
|
}
|
|
|
|
// Create a client to the server.
|
|
client, err := CommandClient(cmd)
|
|
if err != nil {
|
|
return errors.Wrap(err, "creating client")
|
|
}
|
|
|
|
// Determine slice count.
|
|
maxSlices, err := client.MaxSliceByIndex(ctx)
|
|
if err != nil {
|
|
return errors.Wrap(err, "getting slice count")
|
|
}
|
|
|
|
// Export each slice.
|
|
for slice := uint64(0); slice <= maxSlices[cmd.Index]; slice++ {
|
|
logger.Printf("exporting slice: %d", slice)
|
|
if err := client.ExportCSV(ctx, cmd.Index, cmd.Field, slice, w); err != nil {
|
|
return errors.Wrap(err, "exporting")
|
|
}
|
|
}
|
|
|
|
// Close writer, if applicable.
|
|
if w, ok := w.(io.Closer); ok {
|
|
if err := w.Close(); err != nil {
|
|
return errors.Wrap(err, "closing")
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (cmd *ExportCommand) TLSHost() string {
|
|
return cmd.Host
|
|
}
|
|
|
|
func (cmd *ExportCommand) TLSConfiguration() server.TLSConfig {
|
|
return cmd.TLS
|
|
}
|