1546 lines
34 KiB
Go
1546 lines
34 KiB
Go
package bolt_test
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import (
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"bytes"
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"encoding/binary"
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"errors"
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"flag"
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"fmt"
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"hash/fnv"
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"io/ioutil"
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"log"
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"os"
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"path/filepath"
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"regexp"
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"sort"
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"strings"
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"sync"
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"testing"
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"time"
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"unsafe"
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"github.com/boltdb/bolt"
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)
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var statsFlag = flag.Bool("stats", false, "show performance stats")
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// version is the data file format version.
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const version = 2
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// magic is the marker value to indicate that a file is a Bolt DB.
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const magic uint32 = 0xED0CDAED
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// pageSize is the size of one page in the data file.
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const pageSize = 4096
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// pageHeaderSize is the size of a page header.
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const pageHeaderSize = 16
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// meta represents a simplified version of a database meta page for testing.
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type meta struct {
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magic uint32
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version uint32
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_ uint32
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_ uint32
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_ [16]byte
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_ uint64
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pgid uint64
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_ uint64
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checksum uint64
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}
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// Ensure that a database can be opened without error.
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func TestOpen(t *testing.T) {
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path := tempfile()
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db, err := bolt.Open(path, 0666, nil)
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if err != nil {
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t.Fatal(err)
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} else if db == nil {
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t.Fatal("expected db")
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}
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if s := db.Path(); s != path {
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t.Fatalf("unexpected path: %s", s)
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}
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if err := db.Close(); err != nil {
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t.Fatal(err)
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}
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}
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// Ensure that opening a database with a blank path returns an error.
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func TestOpen_ErrPathRequired(t *testing.T) {
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_, err := bolt.Open("", 0666, nil)
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if err == nil {
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t.Fatalf("expected error")
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}
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}
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// Ensure that opening a database with a bad path returns an error.
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func TestOpen_ErrNotExists(t *testing.T) {
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_, err := bolt.Open(filepath.Join(tempfile(), "bad-path"), 0666, nil)
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if err == nil {
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t.Fatal("expected error")
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}
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}
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// Ensure that opening a file that is not a Bolt database returns ErrInvalid.
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func TestOpen_ErrInvalid(t *testing.T) {
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path := tempfile()
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f, err := os.Create(path)
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if err != nil {
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t.Fatal(err)
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}
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if _, err := fmt.Fprintln(f, "this is not a bolt database"); err != nil {
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t.Fatal(err)
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}
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if err := f.Close(); err != nil {
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t.Fatal(err)
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}
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defer os.Remove(path)
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if _, err := bolt.Open(path, 0666, nil); err != bolt.ErrInvalid {
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t.Fatalf("unexpected error: %s", err)
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}
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}
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// Ensure that opening a file with two invalid versions returns ErrVersionMismatch.
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func TestOpen_ErrVersionMismatch(t *testing.T) {
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if pageSize != os.Getpagesize() {
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t.Skip("page size mismatch")
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}
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// Create empty database.
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db := MustOpenDB()
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path := db.Path()
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defer db.MustClose()
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// Close database.
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if err := db.DB.Close(); err != nil {
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t.Fatal(err)
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}
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// Read data file.
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buf, err := ioutil.ReadFile(path)
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if err != nil {
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t.Fatal(err)
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}
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// Rewrite meta pages.
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meta0 := (*meta)(unsafe.Pointer(&buf[pageHeaderSize]))
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meta0.version++
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meta1 := (*meta)(unsafe.Pointer(&buf[pageSize+pageHeaderSize]))
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meta1.version++
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if err := ioutil.WriteFile(path, buf, 0666); err != nil {
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t.Fatal(err)
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}
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// Reopen data file.
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if _, err := bolt.Open(path, 0666, nil); err != bolt.ErrVersionMismatch {
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t.Fatalf("unexpected error: %s", err)
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}
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}
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// Ensure that opening a file with two invalid checksums returns ErrChecksum.
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func TestOpen_ErrChecksum(t *testing.T) {
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if pageSize != os.Getpagesize() {
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t.Skip("page size mismatch")
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}
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// Create empty database.
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db := MustOpenDB()
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path := db.Path()
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defer db.MustClose()
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// Close database.
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if err := db.DB.Close(); err != nil {
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t.Fatal(err)
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}
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// Read data file.
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buf, err := ioutil.ReadFile(path)
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if err != nil {
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t.Fatal(err)
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}
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// Rewrite meta pages.
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meta0 := (*meta)(unsafe.Pointer(&buf[pageHeaderSize]))
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meta0.pgid++
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meta1 := (*meta)(unsafe.Pointer(&buf[pageSize+pageHeaderSize]))
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meta1.pgid++
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if err := ioutil.WriteFile(path, buf, 0666); err != nil {
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t.Fatal(err)
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}
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// Reopen data file.
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if _, err := bolt.Open(path, 0666, nil); err != bolt.ErrChecksum {
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t.Fatalf("unexpected error: %s", err)
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}
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}
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// Ensure that opening a database does not increase its size.
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// https://github.com/boltdb/bolt/issues/291
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func TestOpen_Size(t *testing.T) {
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// Open a data file.
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db := MustOpenDB()
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path := db.Path()
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defer db.MustClose()
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pagesize := db.Info().PageSize
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// Insert until we get above the minimum 4MB size.
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if err := db.Update(func(tx *bolt.Tx) error {
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b, _ := tx.CreateBucketIfNotExists([]byte("data"))
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for i := 0; i < 10000; i++ {
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if err := b.Put([]byte(fmt.Sprintf("%04d", i)), make([]byte, 1000)); err != nil {
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t.Fatal(err)
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}
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}
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return nil
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}); err != nil {
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t.Fatal(err)
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}
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// Close database and grab the size.
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if err := db.DB.Close(); err != nil {
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t.Fatal(err)
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}
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sz := fileSize(path)
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if sz == 0 {
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t.Fatalf("unexpected new file size: %d", sz)
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}
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// Reopen database, update, and check size again.
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db0, err := bolt.Open(path, 0666, nil)
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if err != nil {
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t.Fatal(err)
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}
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if err := db0.Update(func(tx *bolt.Tx) error {
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if err := tx.Bucket([]byte("data")).Put([]byte{0}, []byte{0}); err != nil {
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t.Fatal(err)
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}
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return nil
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}); err != nil {
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t.Fatal(err)
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}
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if err := db0.Close(); err != nil {
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t.Fatal(err)
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}
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newSz := fileSize(path)
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if newSz == 0 {
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t.Fatalf("unexpected new file size: %d", newSz)
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}
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// Compare the original size with the new size.
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// db size might increase by a few page sizes due to the new small update.
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if sz < newSz-5*int64(pagesize) {
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t.Fatalf("unexpected file growth: %d => %d", sz, newSz)
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}
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}
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// Ensure that opening a database beyond the max step size does not increase its size.
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// https://github.com/boltdb/bolt/issues/303
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func TestOpen_Size_Large(t *testing.T) {
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if testing.Short() {
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t.Skip("short mode")
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}
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// Open a data file.
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db := MustOpenDB()
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path := db.Path()
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defer db.MustClose()
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pagesize := db.Info().PageSize
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// Insert until we get above the minimum 4MB size.
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var index uint64
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for i := 0; i < 10000; i++ {
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if err := db.Update(func(tx *bolt.Tx) error {
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b, _ := tx.CreateBucketIfNotExists([]byte("data"))
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for j := 0; j < 1000; j++ {
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if err := b.Put(u64tob(index), make([]byte, 50)); err != nil {
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t.Fatal(err)
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}
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index++
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}
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return nil
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}); err != nil {
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t.Fatal(err)
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}
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}
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// Close database and grab the size.
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if err := db.DB.Close(); err != nil {
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t.Fatal(err)
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}
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sz := fileSize(path)
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if sz == 0 {
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t.Fatalf("unexpected new file size: %d", sz)
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} else if sz < (1 << 30) {
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t.Fatalf("expected larger initial size: %d", sz)
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}
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// Reopen database, update, and check size again.
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db0, err := bolt.Open(path, 0666, nil)
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if err != nil {
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t.Fatal(err)
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}
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if err := db0.Update(func(tx *bolt.Tx) error {
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return tx.Bucket([]byte("data")).Put([]byte{0}, []byte{0})
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}); err != nil {
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t.Fatal(err)
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}
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if err := db0.Close(); err != nil {
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t.Fatal(err)
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}
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newSz := fileSize(path)
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if newSz == 0 {
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t.Fatalf("unexpected new file size: %d", newSz)
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}
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// Compare the original size with the new size.
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// db size might increase by a few page sizes due to the new small update.
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if sz < newSz-5*int64(pagesize) {
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t.Fatalf("unexpected file growth: %d => %d", sz, newSz)
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}
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}
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// Ensure that a re-opened database is consistent.
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func TestOpen_Check(t *testing.T) {
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path := tempfile()
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db, err := bolt.Open(path, 0666, nil)
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if err != nil {
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t.Fatal(err)
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}
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if err := db.View(func(tx *bolt.Tx) error { return <-tx.Check() }); err != nil {
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t.Fatal(err)
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}
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if err := db.Close(); err != nil {
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t.Fatal(err)
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}
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db, err = bolt.Open(path, 0666, nil)
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if err != nil {
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t.Fatal(err)
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}
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if err := db.View(func(tx *bolt.Tx) error { return <-tx.Check() }); err != nil {
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t.Fatal(err)
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}
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if err := db.Close(); err != nil {
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t.Fatal(err)
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}
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}
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// Ensure that write errors to the meta file handler during initialization are returned.
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func TestOpen_MetaInitWriteError(t *testing.T) {
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t.Skip("pending")
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}
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// Ensure that a database that is too small returns an error.
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func TestOpen_FileTooSmall(t *testing.T) {
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path := tempfile()
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db, err := bolt.Open(path, 0666, nil)
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if err != nil {
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t.Fatal(err)
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}
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if err := db.Close(); err != nil {
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t.Fatal(err)
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}
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// corrupt the database
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if err := os.Truncate(path, int64(os.Getpagesize())); err != nil {
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t.Fatal(err)
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}
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db, err = bolt.Open(path, 0666, nil)
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if err == nil || err.Error() != "file size too small" {
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t.Fatalf("unexpected error: %s", err)
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}
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}
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// TestDB_Open_InitialMmapSize tests if having InitialMmapSize large enough
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// to hold data from concurrent write transaction resolves the issue that
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// read transaction blocks the write transaction and causes deadlock.
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// This is a very hacky test since the mmap size is not exposed.
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func TestDB_Open_InitialMmapSize(t *testing.T) {
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path := tempfile()
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defer os.Remove(path)
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initMmapSize := 1 << 31 // 2GB
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testWriteSize := 1 << 27 // 134MB
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db, err := bolt.Open(path, 0666, &bolt.Options{InitialMmapSize: initMmapSize})
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if err != nil {
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t.Fatal(err)
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}
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// create a long-running read transaction
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// that never gets closed while writing
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rtx, err := db.Begin(false)
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if err != nil {
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t.Fatal(err)
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}
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// create a write transaction
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wtx, err := db.Begin(true)
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if err != nil {
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t.Fatal(err)
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}
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b, err := wtx.CreateBucket([]byte("test"))
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if err != nil {
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t.Fatal(err)
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}
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// and commit a large write
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err = b.Put([]byte("foo"), make([]byte, testWriteSize))
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if err != nil {
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t.Fatal(err)
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}
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done := make(chan struct{})
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go func() {
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if err := wtx.Commit(); err != nil {
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t.Fatal(err)
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}
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done <- struct{}{}
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}()
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select {
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case <-time.After(5 * time.Second):
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t.Errorf("unexpected that the reader blocks writer")
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case <-done:
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}
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if err := rtx.Rollback(); err != nil {
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t.Fatal(err)
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}
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}
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// Ensure that a database cannot open a transaction when it's not open.
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func TestDB_Begin_ErrDatabaseNotOpen(t *testing.T) {
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var db bolt.DB
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if _, err := db.Begin(false); err != bolt.ErrDatabaseNotOpen {
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t.Fatalf("unexpected error: %s", err)
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}
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}
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// Ensure that a read-write transaction can be retrieved.
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func TestDB_BeginRW(t *testing.T) {
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db := MustOpenDB()
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defer db.MustClose()
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tx, err := db.Begin(true)
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if err != nil {
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t.Fatal(err)
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} else if tx == nil {
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t.Fatal("expected tx")
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}
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if tx.DB() != db.DB {
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t.Fatal("unexpected tx database")
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} else if !tx.Writable() {
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t.Fatal("expected writable tx")
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}
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if err := tx.Commit(); err != nil {
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t.Fatal(err)
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}
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}
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|
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// Ensure that opening a transaction while the DB is closed returns an error.
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func TestDB_BeginRW_Closed(t *testing.T) {
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var db bolt.DB
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if _, err := db.Begin(true); err != bolt.ErrDatabaseNotOpen {
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t.Fatalf("unexpected error: %s", err)
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}
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}
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|
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func TestDB_Close_PendingTx_RW(t *testing.T) { testDB_Close_PendingTx(t, true) }
|
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func TestDB_Close_PendingTx_RO(t *testing.T) { testDB_Close_PendingTx(t, false) }
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|
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// Ensure that a database cannot close while transactions are open.
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func testDB_Close_PendingTx(t *testing.T, writable bool) {
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db := MustOpenDB()
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defer db.MustClose()
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|
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// Start transaction.
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tx, err := db.Begin(true)
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if err != nil {
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t.Fatal(err)
|
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}
|
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|
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// Open update in separate goroutine.
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done := make(chan struct{})
|
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go func() {
|
|
if err := db.Close(); err != nil {
|
|
t.Fatal(err)
|
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}
|
|
close(done)
|
|
}()
|
|
|
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// Ensure database hasn't closed.
|
|
time.Sleep(100 * time.Millisecond)
|
|
select {
|
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case <-done:
|
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t.Fatal("database closed too early")
|
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default:
|
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}
|
|
|
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// Commit transaction.
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if err := tx.Commit(); err != nil {
|
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t.Fatal(err)
|
|
}
|
|
|
|
// Ensure database closed now.
|
|
time.Sleep(100 * time.Millisecond)
|
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select {
|
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case <-done:
|
|
default:
|
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t.Fatal("database did not close")
|
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}
|
|
}
|
|
|
|
// Ensure a database can provide a transactional block.
|
|
func TestDB_Update(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
b, err := tx.CreateBucket([]byte("widgets"))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := b.Put([]byte("foo"), []byte("bar")); err != nil {
|
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t.Fatal(err)
|
|
}
|
|
if err := b.Put([]byte("baz"), []byte("bat")); err != nil {
|
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t.Fatal(err)
|
|
}
|
|
if err := b.Delete([]byte("foo")); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := db.View(func(tx *bolt.Tx) error {
|
|
b := tx.Bucket([]byte("widgets"))
|
|
if v := b.Get([]byte("foo")); v != nil {
|
|
t.Fatalf("expected nil value, got: %v", v)
|
|
}
|
|
if v := b.Get([]byte("baz")); !bytes.Equal(v, []byte("bat")) {
|
|
t.Fatalf("unexpected value: %v", v)
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
// Ensure a closed database returns an error while running a transaction block
|
|
func TestDB_Update_Closed(t *testing.T) {
|
|
var db bolt.DB
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
if _, err := tx.CreateBucket([]byte("widgets")); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
return nil
|
|
}); err != bolt.ErrDatabaseNotOpen {
|
|
t.Fatalf("unexpected error: %s", err)
|
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}
|
|
}
|
|
|
|
// Ensure a panic occurs while trying to commit a managed transaction.
|
|
func TestDB_Update_ManualCommit(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
|
|
var panicked bool
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
func() {
|
|
defer func() {
|
|
if r := recover(); r != nil {
|
|
panicked = true
|
|
}
|
|
}()
|
|
|
|
if err := tx.Commit(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}()
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
} else if !panicked {
|
|
t.Fatal("expected panic")
|
|
}
|
|
}
|
|
|
|
// Ensure a panic occurs while trying to rollback a managed transaction.
|
|
func TestDB_Update_ManualRollback(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
|
|
var panicked bool
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
func() {
|
|
defer func() {
|
|
if r := recover(); r != nil {
|
|
panicked = true
|
|
}
|
|
}()
|
|
|
|
if err := tx.Rollback(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}()
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
} else if !panicked {
|
|
t.Fatal("expected panic")
|
|
}
|
|
}
|
|
|
|
// Ensure a panic occurs while trying to commit a managed transaction.
|
|
func TestDB_View_ManualCommit(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
|
|
var panicked bool
|
|
if err := db.View(func(tx *bolt.Tx) error {
|
|
func() {
|
|
defer func() {
|
|
if r := recover(); r != nil {
|
|
panicked = true
|
|
}
|
|
}()
|
|
|
|
if err := tx.Commit(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}()
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
} else if !panicked {
|
|
t.Fatal("expected panic")
|
|
}
|
|
}
|
|
|
|
// Ensure a panic occurs while trying to rollback a managed transaction.
|
|
func TestDB_View_ManualRollback(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
|
|
var panicked bool
|
|
if err := db.View(func(tx *bolt.Tx) error {
|
|
func() {
|
|
defer func() {
|
|
if r := recover(); r != nil {
|
|
panicked = true
|
|
}
|
|
}()
|
|
|
|
if err := tx.Rollback(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}()
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
} else if !panicked {
|
|
t.Fatal("expected panic")
|
|
}
|
|
}
|
|
|
|
// Ensure a write transaction that panics does not hold open locks.
|
|
func TestDB_Update_Panic(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
|
|
// Panic during update but recover.
|
|
func() {
|
|
defer func() {
|
|
if r := recover(); r != nil {
|
|
t.Log("recover: update", r)
|
|
}
|
|
}()
|
|
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
if _, err := tx.CreateBucket([]byte("widgets")); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
panic("omg")
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}()
|
|
|
|
// Verify we can update again.
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
if _, err := tx.CreateBucket([]byte("widgets")); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// Verify that our change persisted.
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
if tx.Bucket([]byte("widgets")) == nil {
|
|
t.Fatal("expected bucket")
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
// Ensure a database can return an error through a read-only transactional block.
|
|
func TestDB_View_Error(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
|
|
if err := db.View(func(tx *bolt.Tx) error {
|
|
return errors.New("xxx")
|
|
}); err == nil || err.Error() != "xxx" {
|
|
t.Fatalf("unexpected error: %s", err)
|
|
}
|
|
}
|
|
|
|
// Ensure a read transaction that panics does not hold open locks.
|
|
func TestDB_View_Panic(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
if _, err := tx.CreateBucket([]byte("widgets")); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// Panic during view transaction but recover.
|
|
func() {
|
|
defer func() {
|
|
if r := recover(); r != nil {
|
|
t.Log("recover: view", r)
|
|
}
|
|
}()
|
|
|
|
if err := db.View(func(tx *bolt.Tx) error {
|
|
if tx.Bucket([]byte("widgets")) == nil {
|
|
t.Fatal("expected bucket")
|
|
}
|
|
panic("omg")
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}()
|
|
|
|
// Verify that we can still use read transactions.
|
|
if err := db.View(func(tx *bolt.Tx) error {
|
|
if tx.Bucket([]byte("widgets")) == nil {
|
|
t.Fatal("expected bucket")
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
// Ensure that DB stats can be returned.
|
|
func TestDB_Stats(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
_, err := tx.CreateBucket([]byte("widgets"))
|
|
return err
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
stats := db.Stats()
|
|
if stats.TxStats.PageCount != 2 {
|
|
t.Fatalf("unexpected TxStats.PageCount: %d", stats.TxStats.PageCount)
|
|
} else if stats.FreePageN != 0 {
|
|
t.Fatalf("unexpected FreePageN != 0: %d", stats.FreePageN)
|
|
} else if stats.PendingPageN != 2 {
|
|
t.Fatalf("unexpected PendingPageN != 2: %d", stats.PendingPageN)
|
|
}
|
|
}
|
|
|
|
// Ensure that database pages are in expected order and type.
|
|
func TestDB_Consistency(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
_, err := tx.CreateBucket([]byte("widgets"))
|
|
return err
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
for i := 0; i < 10; i++ {
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
if err := tx.Bucket([]byte("widgets")).Put([]byte("foo"), []byte("bar")); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
if p, _ := tx.Page(0); p == nil {
|
|
t.Fatal("expected page")
|
|
} else if p.Type != "meta" {
|
|
t.Fatalf("unexpected page type: %s", p.Type)
|
|
}
|
|
|
|
if p, _ := tx.Page(1); p == nil {
|
|
t.Fatal("expected page")
|
|
} else if p.Type != "meta" {
|
|
t.Fatalf("unexpected page type: %s", p.Type)
|
|
}
|
|
|
|
if p, _ := tx.Page(2); p == nil {
|
|
t.Fatal("expected page")
|
|
} else if p.Type != "free" {
|
|
t.Fatalf("unexpected page type: %s", p.Type)
|
|
}
|
|
|
|
if p, _ := tx.Page(3); p == nil {
|
|
t.Fatal("expected page")
|
|
} else if p.Type != "free" {
|
|
t.Fatalf("unexpected page type: %s", p.Type)
|
|
}
|
|
|
|
if p, _ := tx.Page(4); p == nil {
|
|
t.Fatal("expected page")
|
|
} else if p.Type != "leaf" {
|
|
t.Fatalf("unexpected page type: %s", p.Type)
|
|
}
|
|
|
|
if p, _ := tx.Page(5); p == nil {
|
|
t.Fatal("expected page")
|
|
} else if p.Type != "freelist" {
|
|
t.Fatalf("unexpected page type: %s", p.Type)
|
|
}
|
|
|
|
if p, _ := tx.Page(6); p != nil {
|
|
t.Fatal("unexpected page")
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
// Ensure that DB stats can be subtracted from one another.
|
|
func TestDBStats_Sub(t *testing.T) {
|
|
var a, b bolt.Stats
|
|
a.TxStats.PageCount = 3
|
|
a.FreePageN = 4
|
|
b.TxStats.PageCount = 10
|
|
b.FreePageN = 14
|
|
diff := b.Sub(&a)
|
|
if diff.TxStats.PageCount != 7 {
|
|
t.Fatalf("unexpected TxStats.PageCount: %d", diff.TxStats.PageCount)
|
|
}
|
|
|
|
// free page stats are copied from the receiver and not subtracted
|
|
if diff.FreePageN != 14 {
|
|
t.Fatalf("unexpected FreePageN: %d", diff.FreePageN)
|
|
}
|
|
}
|
|
|
|
// Ensure two functions can perform updates in a single batch.
|
|
func TestDB_Batch(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
if _, err := tx.CreateBucket([]byte("widgets")); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// Iterate over multiple updates in separate goroutines.
|
|
n := 2
|
|
ch := make(chan error)
|
|
for i := 0; i < n; i++ {
|
|
go func(i int) {
|
|
ch <- db.Batch(func(tx *bolt.Tx) error {
|
|
return tx.Bucket([]byte("widgets")).Put(u64tob(uint64(i)), []byte{})
|
|
})
|
|
}(i)
|
|
}
|
|
|
|
// Check all responses to make sure there's no error.
|
|
for i := 0; i < n; i++ {
|
|
if err := <-ch; err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
// Ensure data is correct.
|
|
if err := db.View(func(tx *bolt.Tx) error {
|
|
b := tx.Bucket([]byte("widgets"))
|
|
for i := 0; i < n; i++ {
|
|
if v := b.Get(u64tob(uint64(i))); v == nil {
|
|
t.Errorf("key not found: %d", i)
|
|
}
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestDB_Batch_Panic(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
|
|
var sentinel int
|
|
var bork = &sentinel
|
|
var problem interface{}
|
|
var err error
|
|
|
|
// Execute a function inside a batch that panics.
|
|
func() {
|
|
defer func() {
|
|
if p := recover(); p != nil {
|
|
problem = p
|
|
}
|
|
}()
|
|
err = db.Batch(func(tx *bolt.Tx) error {
|
|
panic(bork)
|
|
})
|
|
}()
|
|
|
|
// Verify there is no error.
|
|
if g, e := err, error(nil); g != e {
|
|
t.Fatalf("wrong error: %v != %v", g, e)
|
|
}
|
|
// Verify the panic was captured.
|
|
if g, e := problem, bork; g != e {
|
|
t.Fatalf("wrong error: %v != %v", g, e)
|
|
}
|
|
}
|
|
|
|
func TestDB_BatchFull(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
_, err := tx.CreateBucket([]byte("widgets"))
|
|
return err
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
const size = 3
|
|
// buffered so we never leak goroutines
|
|
ch := make(chan error, size)
|
|
put := func(i int) {
|
|
ch <- db.Batch(func(tx *bolt.Tx) error {
|
|
return tx.Bucket([]byte("widgets")).Put(u64tob(uint64(i)), []byte{})
|
|
})
|
|
}
|
|
|
|
db.MaxBatchSize = size
|
|
// high enough to never trigger here
|
|
db.MaxBatchDelay = 1 * time.Hour
|
|
|
|
go put(1)
|
|
go put(2)
|
|
|
|
// Give the batch a chance to exhibit bugs.
|
|
time.Sleep(10 * time.Millisecond)
|
|
|
|
// not triggered yet
|
|
select {
|
|
case <-ch:
|
|
t.Fatalf("batch triggered too early")
|
|
default:
|
|
}
|
|
|
|
go put(3)
|
|
|
|
// Check all responses to make sure there's no error.
|
|
for i := 0; i < size; i++ {
|
|
if err := <-ch; err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
// Ensure data is correct.
|
|
if err := db.View(func(tx *bolt.Tx) error {
|
|
b := tx.Bucket([]byte("widgets"))
|
|
for i := 1; i <= size; i++ {
|
|
if v := b.Get(u64tob(uint64(i))); v == nil {
|
|
t.Errorf("key not found: %d", i)
|
|
}
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestDB_BatchTime(t *testing.T) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
_, err := tx.CreateBucket([]byte("widgets"))
|
|
return err
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
const size = 1
|
|
// buffered so we never leak goroutines
|
|
ch := make(chan error, size)
|
|
put := func(i int) {
|
|
ch <- db.Batch(func(tx *bolt.Tx) error {
|
|
return tx.Bucket([]byte("widgets")).Put(u64tob(uint64(i)), []byte{})
|
|
})
|
|
}
|
|
|
|
db.MaxBatchSize = 1000
|
|
db.MaxBatchDelay = 0
|
|
|
|
go put(1)
|
|
|
|
// Batch must trigger by time alone.
|
|
|
|
// Check all responses to make sure there's no error.
|
|
for i := 0; i < size; i++ {
|
|
if err := <-ch; err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
// Ensure data is correct.
|
|
if err := db.View(func(tx *bolt.Tx) error {
|
|
b := tx.Bucket([]byte("widgets"))
|
|
for i := 1; i <= size; i++ {
|
|
if v := b.Get(u64tob(uint64(i))); v == nil {
|
|
t.Errorf("key not found: %d", i)
|
|
}
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func ExampleDB_Update() {
|
|
// Open the database.
|
|
db, err := bolt.Open(tempfile(), 0666, nil)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer os.Remove(db.Path())
|
|
|
|
// Execute several commands within a read-write transaction.
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
b, err := tx.CreateBucket([]byte("widgets"))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err := b.Put([]byte("foo"), []byte("bar")); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// Read the value back from a separate read-only transaction.
|
|
if err := db.View(func(tx *bolt.Tx) error {
|
|
value := tx.Bucket([]byte("widgets")).Get([]byte("foo"))
|
|
fmt.Printf("The value of 'foo' is: %s\n", value)
|
|
return nil
|
|
}); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// Close database to release the file lock.
|
|
if err := db.Close(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// Output:
|
|
// The value of 'foo' is: bar
|
|
}
|
|
|
|
func ExampleDB_View() {
|
|
// Open the database.
|
|
db, err := bolt.Open(tempfile(), 0666, nil)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer os.Remove(db.Path())
|
|
|
|
// Insert data into a bucket.
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
b, err := tx.CreateBucket([]byte("people"))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err := b.Put([]byte("john"), []byte("doe")); err != nil {
|
|
return err
|
|
}
|
|
if err := b.Put([]byte("susy"), []byte("que")); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// Access data from within a read-only transactional block.
|
|
if err := db.View(func(tx *bolt.Tx) error {
|
|
v := tx.Bucket([]byte("people")).Get([]byte("john"))
|
|
fmt.Printf("John's last name is %s.\n", v)
|
|
return nil
|
|
}); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// Close database to release the file lock.
|
|
if err := db.Close(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// Output:
|
|
// John's last name is doe.
|
|
}
|
|
|
|
func ExampleDB_Begin_ReadOnly() {
|
|
// Open the database.
|
|
db, err := bolt.Open(tempfile(), 0666, nil)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer os.Remove(db.Path())
|
|
|
|
// Create a bucket using a read-write transaction.
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
_, err := tx.CreateBucket([]byte("widgets"))
|
|
return err
|
|
}); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// Create several keys in a transaction.
|
|
tx, err := db.Begin(true)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
b := tx.Bucket([]byte("widgets"))
|
|
if err := b.Put([]byte("john"), []byte("blue")); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
if err := b.Put([]byte("abby"), []byte("red")); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
if err := b.Put([]byte("zephyr"), []byte("purple")); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
if err := tx.Commit(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// Iterate over the values in sorted key order.
|
|
tx, err = db.Begin(false)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
c := tx.Bucket([]byte("widgets")).Cursor()
|
|
for k, v := c.First(); k != nil; k, v = c.Next() {
|
|
fmt.Printf("%s likes %s\n", k, v)
|
|
}
|
|
|
|
if err := tx.Rollback(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
if err := db.Close(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// Output:
|
|
// abby likes red
|
|
// john likes blue
|
|
// zephyr likes purple
|
|
}
|
|
|
|
func BenchmarkDBBatchAutomatic(b *testing.B) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
_, err := tx.CreateBucket([]byte("bench"))
|
|
return err
|
|
}); err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
start := make(chan struct{})
|
|
var wg sync.WaitGroup
|
|
|
|
for round := 0; round < 1000; round++ {
|
|
wg.Add(1)
|
|
|
|
go func(id uint32) {
|
|
defer wg.Done()
|
|
<-start
|
|
|
|
h := fnv.New32a()
|
|
buf := make([]byte, 4)
|
|
binary.LittleEndian.PutUint32(buf, id)
|
|
_, _ = h.Write(buf[:])
|
|
k := h.Sum(nil)
|
|
insert := func(tx *bolt.Tx) error {
|
|
b := tx.Bucket([]byte("bench"))
|
|
return b.Put(k, []byte("filler"))
|
|
}
|
|
if err := db.Batch(insert); err != nil {
|
|
b.Error(err)
|
|
return
|
|
}
|
|
}(uint32(round))
|
|
}
|
|
close(start)
|
|
wg.Wait()
|
|
}
|
|
|
|
b.StopTimer()
|
|
validateBatchBench(b, db)
|
|
}
|
|
|
|
func BenchmarkDBBatchSingle(b *testing.B) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
_, err := tx.CreateBucket([]byte("bench"))
|
|
return err
|
|
}); err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
start := make(chan struct{})
|
|
var wg sync.WaitGroup
|
|
|
|
for round := 0; round < 1000; round++ {
|
|
wg.Add(1)
|
|
go func(id uint32) {
|
|
defer wg.Done()
|
|
<-start
|
|
|
|
h := fnv.New32a()
|
|
buf := make([]byte, 4)
|
|
binary.LittleEndian.PutUint32(buf, id)
|
|
_, _ = h.Write(buf[:])
|
|
k := h.Sum(nil)
|
|
insert := func(tx *bolt.Tx) error {
|
|
b := tx.Bucket([]byte("bench"))
|
|
return b.Put(k, []byte("filler"))
|
|
}
|
|
if err := db.Update(insert); err != nil {
|
|
b.Error(err)
|
|
return
|
|
}
|
|
}(uint32(round))
|
|
}
|
|
close(start)
|
|
wg.Wait()
|
|
}
|
|
|
|
b.StopTimer()
|
|
validateBatchBench(b, db)
|
|
}
|
|
|
|
func BenchmarkDBBatchManual10x100(b *testing.B) {
|
|
db := MustOpenDB()
|
|
defer db.MustClose()
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
_, err := tx.CreateBucket([]byte("bench"))
|
|
return err
|
|
}); err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
start := make(chan struct{})
|
|
var wg sync.WaitGroup
|
|
|
|
for major := 0; major < 10; major++ {
|
|
wg.Add(1)
|
|
go func(id uint32) {
|
|
defer wg.Done()
|
|
<-start
|
|
|
|
insert100 := func(tx *bolt.Tx) error {
|
|
h := fnv.New32a()
|
|
buf := make([]byte, 4)
|
|
for minor := uint32(0); minor < 100; minor++ {
|
|
binary.LittleEndian.PutUint32(buf, uint32(id*100+minor))
|
|
h.Reset()
|
|
_, _ = h.Write(buf[:])
|
|
k := h.Sum(nil)
|
|
b := tx.Bucket([]byte("bench"))
|
|
if err := b.Put(k, []byte("filler")); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
if err := db.Update(insert100); err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
}(uint32(major))
|
|
}
|
|
close(start)
|
|
wg.Wait()
|
|
}
|
|
|
|
b.StopTimer()
|
|
validateBatchBench(b, db)
|
|
}
|
|
|
|
func validateBatchBench(b *testing.B, db *DB) {
|
|
var rollback = errors.New("sentinel error to cause rollback")
|
|
validate := func(tx *bolt.Tx) error {
|
|
bucket := tx.Bucket([]byte("bench"))
|
|
h := fnv.New32a()
|
|
buf := make([]byte, 4)
|
|
for id := uint32(0); id < 1000; id++ {
|
|
binary.LittleEndian.PutUint32(buf, id)
|
|
h.Reset()
|
|
_, _ = h.Write(buf[:])
|
|
k := h.Sum(nil)
|
|
v := bucket.Get(k)
|
|
if v == nil {
|
|
b.Errorf("not found id=%d key=%x", id, k)
|
|
continue
|
|
}
|
|
if g, e := v, []byte("filler"); !bytes.Equal(g, e) {
|
|
b.Errorf("bad value for id=%d key=%x: %s != %q", id, k, g, e)
|
|
}
|
|
if err := bucket.Delete(k); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
// should be empty now
|
|
c := bucket.Cursor()
|
|
for k, v := c.First(); k != nil; k, v = c.Next() {
|
|
b.Errorf("unexpected key: %x = %q", k, v)
|
|
}
|
|
return rollback
|
|
}
|
|
if err := db.Update(validate); err != nil && err != rollback {
|
|
b.Error(err)
|
|
}
|
|
}
|
|
|
|
// DB is a test wrapper for bolt.DB.
|
|
type DB struct {
|
|
*bolt.DB
|
|
}
|
|
|
|
// MustOpenDB returns a new, open DB at a temporary location.
|
|
func MustOpenDB() *DB {
|
|
db, err := bolt.Open(tempfile(), 0666, nil)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return &DB{db}
|
|
}
|
|
|
|
// Close closes the database and deletes the underlying file.
|
|
func (db *DB) Close() error {
|
|
// Log statistics.
|
|
if *statsFlag {
|
|
db.PrintStats()
|
|
}
|
|
|
|
// Check database consistency after every test.
|
|
db.MustCheck()
|
|
|
|
// Close database and remove file.
|
|
defer os.Remove(db.Path())
|
|
return db.DB.Close()
|
|
}
|
|
|
|
// MustClose closes the database and deletes the underlying file. Panic on error.
|
|
func (db *DB) MustClose() {
|
|
if err := db.Close(); err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
|
|
// PrintStats prints the database stats
|
|
func (db *DB) PrintStats() {
|
|
var stats = db.Stats()
|
|
fmt.Printf("[db] %-20s %-20s %-20s\n",
|
|
fmt.Sprintf("pg(%d/%d)", stats.TxStats.PageCount, stats.TxStats.PageAlloc),
|
|
fmt.Sprintf("cur(%d)", stats.TxStats.CursorCount),
|
|
fmt.Sprintf("node(%d/%d)", stats.TxStats.NodeCount, stats.TxStats.NodeDeref),
|
|
)
|
|
fmt.Printf(" %-20s %-20s %-20s\n",
|
|
fmt.Sprintf("rebal(%d/%v)", stats.TxStats.Rebalance, truncDuration(stats.TxStats.RebalanceTime)),
|
|
fmt.Sprintf("spill(%d/%v)", stats.TxStats.Spill, truncDuration(stats.TxStats.SpillTime)),
|
|
fmt.Sprintf("w(%d/%v)", stats.TxStats.Write, truncDuration(stats.TxStats.WriteTime)),
|
|
)
|
|
}
|
|
|
|
// MustCheck runs a consistency check on the database and panics if any errors are found.
|
|
func (db *DB) MustCheck() {
|
|
if err := db.Update(func(tx *bolt.Tx) error {
|
|
// Collect all the errors.
|
|
var errors []error
|
|
for err := range tx.Check() {
|
|
errors = append(errors, err)
|
|
if len(errors) > 10 {
|
|
break
|
|
}
|
|
}
|
|
|
|
// If errors occurred, copy the DB and print the errors.
|
|
if len(errors) > 0 {
|
|
var path = tempfile()
|
|
if err := tx.CopyFile(path, 0600); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
// Print errors.
|
|
fmt.Print("\n\n")
|
|
fmt.Printf("consistency check failed (%d errors)\n", len(errors))
|
|
for _, err := range errors {
|
|
fmt.Println(err)
|
|
}
|
|
fmt.Println("")
|
|
fmt.Println("db saved to:")
|
|
fmt.Println(path)
|
|
fmt.Print("\n\n")
|
|
os.Exit(-1)
|
|
}
|
|
|
|
return nil
|
|
}); err != nil && err != bolt.ErrDatabaseNotOpen {
|
|
panic(err)
|
|
}
|
|
}
|
|
|
|
// CopyTempFile copies a database to a temporary file.
|
|
func (db *DB) CopyTempFile() {
|
|
path := tempfile()
|
|
if err := db.View(func(tx *bolt.Tx) error {
|
|
return tx.CopyFile(path, 0600)
|
|
}); err != nil {
|
|
panic(err)
|
|
}
|
|
fmt.Println("db copied to: ", path)
|
|
}
|
|
|
|
// tempfile returns a temporary file path.
|
|
func tempfile() string {
|
|
f, err := ioutil.TempFile("", "bolt-")
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
if err := f.Close(); err != nil {
|
|
panic(err)
|
|
}
|
|
if err := os.Remove(f.Name()); err != nil {
|
|
panic(err)
|
|
}
|
|
return f.Name()
|
|
}
|
|
|
|
// mustContainKeys checks that a bucket contains a given set of keys.
|
|
func mustContainKeys(b *bolt.Bucket, m map[string]string) {
|
|
found := make(map[string]string)
|
|
if err := b.ForEach(func(k, _ []byte) error {
|
|
found[string(k)] = ""
|
|
return nil
|
|
}); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
// Check for keys found in bucket that shouldn't be there.
|
|
var keys []string
|
|
for k, _ := range found {
|
|
if _, ok := m[string(k)]; !ok {
|
|
keys = append(keys, k)
|
|
}
|
|
}
|
|
if len(keys) > 0 {
|
|
sort.Strings(keys)
|
|
panic(fmt.Sprintf("keys found(%d): %s", len(keys), strings.Join(keys, ",")))
|
|
}
|
|
|
|
// Check for keys not found in bucket that should be there.
|
|
for k, _ := range m {
|
|
if _, ok := found[string(k)]; !ok {
|
|
keys = append(keys, k)
|
|
}
|
|
}
|
|
if len(keys) > 0 {
|
|
sort.Strings(keys)
|
|
panic(fmt.Sprintf("keys not found(%d): %s", len(keys), strings.Join(keys, ",")))
|
|
}
|
|
}
|
|
|
|
func trunc(b []byte, length int) []byte {
|
|
if length < len(b) {
|
|
return b[:length]
|
|
}
|
|
return b
|
|
}
|
|
|
|
func truncDuration(d time.Duration) string {
|
|
return regexp.MustCompile(`^(\d+)(\.\d+)`).ReplaceAllString(d.String(), "$1")
|
|
}
|
|
|
|
func fileSize(path string) int64 {
|
|
fi, err := os.Stat(path)
|
|
if err != nil {
|
|
return 0
|
|
}
|
|
return fi.Size()
|
|
}
|
|
|
|
func warn(v ...interface{}) { fmt.Fprintln(os.Stderr, v...) }
|
|
func warnf(msg string, v ...interface{}) { fmt.Fprintf(os.Stderr, msg+"\n", v...) }
|
|
|
|
// u64tob converts a uint64 into an 8-byte slice.
|
|
func u64tob(v uint64) []byte {
|
|
b := make([]byte, 8)
|
|
binary.BigEndian.PutUint64(b, v)
|
|
return b
|
|
}
|
|
|
|
// btou64 converts an 8-byte slice into an uint64.
|
|
func btou64(b []byte) uint64 { return binary.BigEndian.Uint64(b) }
|