mirror of
https://github.com/featurebasedb/featurebase.git
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126 lines
3.2 KiB
Go
126 lines
3.2 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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"fmt"
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"io"
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"os"
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"path/filepath"
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"syscall"
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"github.com/pilosa/pilosa"
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"github.com/pilosa/pilosa/roaring"
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"github.com/pkg/errors"
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)
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// CheckCommand represents a command for performing consistency checks on data files.
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type CheckCommand struct {
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// Data file paths.
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Paths []string
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// Standard input/output
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*pilosa.CmdIO
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}
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// NewCheckCommand returns a new instance of CheckCommand.
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func NewCheckCommand(stdin io.Reader, stdout, stderr io.Writer) *CheckCommand {
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return &CheckCommand{
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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 check command.
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func (cmd *CheckCommand) Run(ctx context.Context) error {
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for _, path := range cmd.Paths {
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switch filepath.Ext(path) {
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case "":
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if err := cmd.checkBitmapFile(path); err != nil {
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return errors.Wrap(err, "checking bitmap")
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}
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case ".cache":
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if err := cmd.checkCacheFile(path); err != nil {
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return errors.Wrap(err, "checking cache")
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}
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case ".snapshotting":
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if err := cmd.checkSnapshotFile(path); err != nil {
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return errors.Wrap(err, "checking snapshot")
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}
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}
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}
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return nil
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}
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// checkBitmapFile performs a consistency check on path for a roaring bitmap file.
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func (cmd *CheckCommand) checkBitmapFile(path string) error {
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// Open file handle.
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f, err := os.Open(path)
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if err != nil {
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return errors.Wrap(err, "opening file")
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}
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defer f.Close()
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fi, err := f.Stat()
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if err != nil {
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return errors.Wrap(err, "statting file")
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}
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// Memory map the file.
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data, err := syscall.Mmap(int(f.Fd()), 0, int(fi.Size()), syscall.PROT_READ, syscall.MAP_SHARED)
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if err != nil {
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return errors.Wrap(err, "mmapping")
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}
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defer syscall.Munmap(data)
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// Attach the mmap file to the bitmap.
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bm := roaring.NewBitmap()
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if err := bm.UnmarshalBinary(data); err != nil {
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return errors.Wrap(err, "unmarshalling")
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}
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// Perform consistency check.
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if err := bm.Check(); err != nil {
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// Print returned errors.
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switch err := err.(type) {
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case roaring.ErrorList:
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for i := range err {
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fmt.Fprintf(cmd.Stdout, "%s: %s\n", path, err[i].Error())
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}
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default:
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fmt.Fprintf(cmd.Stdout, "%s: %s\n", path, err.Error())
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}
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}
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// Print success message if no errors were found.
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fmt.Fprintf(cmd.Stdout, "%s: ok\n", path)
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return nil
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}
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// checkCacheFile performs a consistency check on path for a cache file.
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func (cmd *CheckCommand) checkCacheFile(path string) error {
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fmt.Fprintf(cmd.Stderr, "%s: ignoring cache file\n", path)
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return nil
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}
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// checkSnapshotFile performs a consistency check on path for a snapshot file.
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func (cmd *CheckCommand) checkSnapshotFile(path string) error {
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fmt.Fprintf(cmd.Stderr, "%s: ignoring snapshot file\n", path)
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return nil
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}
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