forked from hashicorp/otto
/
backend_bolt.go
456 lines (385 loc) · 8.91 KB
/
backend_bolt.go
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package directory
import (
"bytes"
"encoding/json"
"fmt"
"io"
"os"
"path/filepath"
"github.com/boltdb/bolt"
)
var (
boltOttoBucket = []byte("otto")
boltAppsBucket = []byte("apps")
boltBlobBucket = []byte("blob")
boltInfraBucket = []byte("infra")
boltBuckets = [][]byte{
boltOttoBucket,
boltAppsBucket,
boltBlobBucket,
boltInfraBucket,
}
)
var (
boltDataVersion byte = 1
)
// BoltBackend is a Directory backend that stores data on local disk
// using BoltDB.
//
// The primary use case for the BoltBackend is out-of-box experience
// for Otto and single developers. For team usage, BoltBackend is not
// recommended.
//
// This backend also implements io.Closer and should be closed.
type BoltBackend struct {
// Directory where data will be written. This directory will be
// created if it doesn't exist.
Dir string
}
func (b *BoltBackend) GetBlob(k string) (*BlobData, error) {
db, err := b.db()
if err != nil {
return nil, err
}
defer db.Close()
var data []byte
err = db.View(func(tx *bolt.Tx) error {
bucket := tx.Bucket(boltBlobBucket)
data = bucket.Get([]byte(k))
return nil
})
if err != nil {
return nil, err
}
if data == nil {
return nil, nil
}
// We have to copy the data since it isn't valid once we close the DB
data = append([]byte{}, data...)
return &BlobData{
Key: k,
Data: bytes.NewReader(data),
}, nil
}
func (b *BoltBackend) PutBlob(k string, d *BlobData) error {
db, err := b.db()
if err != nil {
return err
}
defer db.Close()
var buf bytes.Buffer
if _, err := io.Copy(&buf, d.Data); err != nil {
return err
}
return db.Update(func(tx *bolt.Tx) error {
bucket := tx.Bucket(boltBlobBucket)
return bucket.Put([]byte(k), buf.Bytes())
})
}
func (b *BoltBackend) GetInfra(infra *Infra) (*Infra, error) {
db, err := b.db()
if err != nil {
return nil, err
}
defer db.Close()
var result *Infra
err = db.View(func(tx *bolt.Tx) error {
bucket := tx.Bucket(boltInfraBucket).Bucket([]byte(
infra.Lookup.Infra))
// If the bucket doesn't exist, we haven't written this yet
if bucket == nil {
return nil
}
// Get the key for this infra
data := bucket.Get([]byte(b.infraKey(infra)))
if data == nil {
return nil
}
result = &Infra{}
return b.structRead(result, data)
})
if err != nil {
return nil, err
}
return result, nil
}
func (b *BoltBackend) PutInfra(infra *Infra) error {
if infra.ID == "" {
infra.setId()
}
db, err := b.db()
if err != nil {
return err
}
defer db.Close()
return db.Update(func(tx *bolt.Tx) error {
data, err := b.structData(infra)
if err != nil {
return err
}
bucket := tx.Bucket(boltInfraBucket)
bucket, err = bucket.CreateBucketIfNotExists([]byte(
infra.Lookup.Infra))
if err != nil {
return err
}
return bucket.Put([]byte(b.infraKey(infra)), data)
})
}
func (b *BoltBackend) GetDev(dev *Dev) (*Dev, error) {
db, err := b.db()
if err != nil {
return nil, err
}
defer db.Close()
var result *Dev
err = db.View(func(tx *bolt.Tx) error {
// Get the app bucket
bucket := tx.Bucket(boltAppsBucket).Bucket([]byte(
dev.Lookup.AppID))
if bucket == nil {
return nil
}
// Get the key for this infra
data := bucket.Get([]byte("dev"))
if data == nil {
return nil
}
result = &Dev{}
return b.structRead(result, data)
})
if err != nil {
return nil, err
}
return result, nil
}
func (b *BoltBackend) PutDev(dev *Dev) error {
if dev.ID == "" {
dev.setId()
}
db, err := b.db()
if err != nil {
return err
}
defer db.Close()
return db.Update(func(tx *bolt.Tx) error {
data, err := b.structData(dev)
if err != nil {
return err
}
// Get the app bucket
bucket := tx.Bucket(boltAppsBucket)
bucket, err = bucket.CreateBucketIfNotExists([]byte(
dev.Lookup.AppID))
if err != nil {
return err
}
return bucket.Put([]byte("dev"), data)
})
}
func (b *BoltBackend) DeleteDev(dev *Dev) error {
db, err := b.db()
if err != nil {
return err
}
defer db.Close()
return db.Update(func(tx *bolt.Tx) error {
// Get the app bucket
bucket := tx.Bucket(boltAppsBucket)
bucket, err = bucket.CreateBucketIfNotExists([]byte(
dev.Lookup.AppID))
if err != nil {
return err
}
return bucket.Delete([]byte("dev"))
})
}
func (b *BoltBackend) GetBuild(build *Build) (*Build, error) {
db, err := b.db()
if err != nil {
return nil, err
}
defer db.Close()
var result *Build
err = db.View(func(tx *bolt.Tx) error {
// Get the app bucket
bucket := tx.Bucket(boltAppsBucket).Bucket([]byte(
build.Lookup.AppID))
if bucket == nil {
return nil
}
// Get the infra bucket
bucket = bucket.Bucket([]byte(fmt.Sprintf(
"%s-%s", build.Lookup.Infra, build.Lookup.InfraFlavor)))
if bucket == nil {
return nil
}
// Get the key for this infra
data := bucket.Get([]byte("build"))
if data == nil {
return nil
}
result = &Build{}
return b.structRead(result, data)
})
if err != nil {
return nil, err
}
return result, nil
}
func (b *BoltBackend) PutBuild(build *Build) error {
db, err := b.db()
if err != nil {
return err
}
defer db.Close()
return db.Update(func(tx *bolt.Tx) error {
data, err := b.structData(build)
if err != nil {
return err
}
// Get the app bucket
bucket := tx.Bucket(boltAppsBucket)
bucket, err = bucket.CreateBucketIfNotExists([]byte(
build.Lookup.AppID))
if err != nil {
return err
}
// Get the infra bucket
bucket, err = bucket.CreateBucketIfNotExists([]byte(fmt.Sprintf(
"%s-%s", build.Lookup.Infra, build.Lookup.InfraFlavor)))
if err != nil {
return err
}
return bucket.Put([]byte("build"), data)
})
}
func (b *BoltBackend) GetDeploy(deploy *Deploy) (*Deploy, error) {
db, err := b.db()
if err != nil {
return nil, err
}
defer db.Close()
var result *Deploy
err = db.View(func(tx *bolt.Tx) error {
// Get the app bucket
bucket := tx.Bucket(boltAppsBucket).Bucket([]byte(
deploy.Lookup.AppID))
if bucket == nil {
return nil
}
// Get the infra bucket
bucket = bucket.Bucket([]byte(fmt.Sprintf(
"%s-%s", deploy.Lookup.Infra, deploy.Lookup.InfraFlavor)))
if bucket == nil {
return nil
}
// Get the key for this infra
data := bucket.Get([]byte("deploy"))
if data == nil {
return nil
}
result = &Deploy{}
return b.structRead(result, data)
})
if err != nil {
return nil, err
}
return result, nil
}
func (b *BoltBackend) PutDeploy(deploy *Deploy) error {
if deploy.ID == "" {
deploy.setId()
}
db, err := b.db()
if err != nil {
return err
}
defer db.Close()
return db.Update(func(tx *bolt.Tx) error {
data, err := b.structData(deploy)
if err != nil {
return err
}
// Get the app bucket
bucket := tx.Bucket(boltAppsBucket)
bucket, err = bucket.CreateBucketIfNotExists([]byte(
deploy.Lookup.AppID))
if err != nil {
return err
}
// Get the infra bucket
bucket, err = bucket.CreateBucketIfNotExists([]byte(fmt.Sprintf(
"%s-%s", deploy.Lookup.Infra, deploy.Lookup.InfraFlavor)))
if err != nil {
return err
}
return bucket.Put([]byte("deploy"), data)
})
}
func (b *BoltBackend) infraKey(infra *Infra) string {
key := "root"
if infra.Lookup.Foundation != "" {
key = fmt.Sprintf("foundation-%s", infra.Lookup.Foundation)
}
return key
}
// db returns the database handle, and sets up the DB if it has never
// been created.
func (b *BoltBackend) db() (*bolt.DB, error) {
// Make the directory to store our DB
if err := os.MkdirAll(b.Dir, 0755); err != nil {
return nil, err
}
// Create/Open the DB
db, err := bolt.Open(filepath.Join(b.Dir, "otto.db"), 0644, nil)
if err != nil {
return nil, err
}
// Create the buckets
err = db.Update(func(tx *bolt.Tx) error {
for _, b := range boltBuckets {
if _, err := tx.CreateBucketIfNotExists(b); err != nil {
return err
}
}
return nil
})
if err != nil {
return nil, err
}
// Check the Otto version
var version byte
err = db.Update(func(tx *bolt.Tx) error {
bucket := tx.Bucket(boltOttoBucket)
data := bucket.Get([]byte("version"))
if data == nil || len(data) == 0 {
version = boltDataVersion
return bucket.Put([]byte("version"), []byte{boltDataVersion})
}
version = data[0]
return nil
})
if err != nil {
return nil, err
}
if version > boltDataVersion {
return nil, fmt.Errorf(
"Data version is higher than this version of Otto knows how\n"+
"to handle! This version of Otto can read up to version %d,\n"+
"but version %d data file found.\n\n"+
"This means that a newer version of Otto touched this data,\n"+
"or the data was corrupted in some other way.",
boltDataVersion, version)
}
return db, nil
}
func (b *BoltBackend) structData(d interface{}) ([]byte, error) {
// Let's just output it in human-readable format to make it easy
// for debugging. Disk space won't matter that much for this data.
return json.MarshalIndent(d, "", "\t")
}
func (b *BoltBackend) structRead(d interface{}, raw []byte) error {
dec := json.NewDecoder(bytes.NewReader(raw))
return dec.Decode(d)
}