Initial Commit

This commit is contained in:
Brian Buller 2016-07-07 09:40:51 -05:00
commit afaa7b518b
3 changed files with 311 additions and 0 deletions

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.gitignore vendored Executable file
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# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe

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README.md Normal file
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boltease
========
A library for easing the use of bolt databases

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boltease.go Normal file
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package boltease
import (
"fmt"
"strconv"
"strings"
"time"
"github.com/boltdb/bolt"
)
// This is a library for easing the use of bolt dbs
// DB is a struct for accomplishing this
type DB struct {
localFile string
localDB *bolt.DB
}
// Open returns the DB object
func Open(filename string) (*DB, error) {
var err error
b := DB{localFile: filename}
b.localDB, err = bolt.Open(filename, 0644, nil)
if err != nil {
return nil, err
}
// Go ahead and make sure it's fresh
return &b, nil
}
// MkBucketPath builds all buckets in the string slice
func (b *DB) MkBucketPath(path []string) error {
err := b.localDB.Update(func(tx *bolt.Tx) error {
var err error
bkt := tx.Bucket([]byte(path[0]))
if bkt == nil {
// Create it
bkt, err = tx.CreateBucket([]byte(path[0]))
if err != nil {
// error creating
return err
}
}
if len(path) > 1 {
path = path[1:]
for i := range path {
nextBkt := bkt.Bucket([]byte(path[i]))
if nextBkt == nil {
// Create it
nextBkt, err = bkt.CreateBucket([]byte(path[i]))
if err != nil {
return err
}
}
bkt = nextBkt
}
}
return err
})
return err
}
// GetValue returns the value at path
// path is a slice of strings
// key is the key to get
func (b *DB) GetValue(path []string, key string) (string, error) {
var err error
var ret string
b.localDB.View(func(tx *bolt.Tx) error {
bkt := tx.Bucket([]byte(path[0]))
if bkt == nil {
return fmt.Errorf("Couldn't find bucket " + path[0])
}
var newBkt *bolt.Bucket
for idx := 1; idx < len(path); idx++ {
newBkt = bkt.Bucket([]byte(path[idx]))
if newBkt == nil {
return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], "/"))
}
}
// newBkt should have the last bucket in the path
ret = string(newBkt.Get([]byte(key)))
return nil
})
return ret, err
}
// SetValue sets the value of key at path to val
// path is a slice of tokens
func (b *DB) SetValue(path []string, key, val string) error {
err := b.MkBucketPath(path)
if err != nil {
return err
}
b.localDB.Update(func(tx *bolt.Tx) error {
newBkt := tx.Bucket([]byte(path[0]))
if newBkt == nil {
return fmt.Errorf("Couldn't find bucket " + path[0])
}
for idx := 1; idx < len(path); idx++ {
newBkt, err = newBkt.CreateBucketIfNotExists([]byte(path[idx]))
if err != nil {
return err
}
}
// newBkt should have the last bucket in the path
return newBkt.Put([]byte(key), []byte(val))
})
return err
}
// GetInt returns the value at path
// If the value cannot be parsed as an int, error
func (b *DB) GetInt(path []string, key string) (int, error) {
var ret int
r, err := b.GetValue(path, key)
if err == nil {
ret, err = strconv.Atoi(r)
}
return ret, err
}
// SetInt Sets an integer value
func (b *DB) SetInt(path []string, key string, val int) error {
return b.SetValue(path, key, strconv.Itoa(val))
}
// GetBool returns the value at 'path'
// If the value cannot be parsed as a bool, error
// We check 'true/false' and '1/0', else error
func (b *DB) GetBool(path []string, key string) (bool, error) {
var ret bool
r, err := b.GetValue(path, key)
if err == nil {
if r == "true" || r == "1" {
ret = true
} else if r != "false" && r != "0" {
err = fmt.Errorf("Cannot parse as a boolean")
}
}
return ret, err
}
// SetBool Sets a boolean value
func (b *DB) SetBool(path []string, key string, val bool) error {
if val {
return b.SetValue(path, key, "true")
}
return b.SetValue(path, key, "false")
}
// GetTimestamp returns the value at 'path'
// If the value cannot be parsed as a RFC3339, error
func (b *DB) GetTimestamp(path []string, key string) (time.Time, error) {
r, err := b.GetValue(path, key)
if err == nil {
return time.Parse(time.RFC3339, r)
}
return time.Unix(0, 0), err
}
// SetTimestamp returns the value at 'path'
func (b *DB) SetTimestamp(path []string, key string, val time.Time) error {
return b.SetValue(path, key, val.Format(time.RFC3339))
}
// GetBucketList returns a list of all sub-buckets at path
func (b *DB) GetBucketList(path []string) ([]string, error) {
var err error
var ret []string
err = b.localDB.Update(func(tx *bolt.Tx) error {
bkt := tx.Bucket([]byte(path[0]))
if bkt == nil {
return fmt.Errorf("Couldn't find bucket " + path[0])
}
var newBkt *bolt.Bucket
var berr error
if len(path) > 1 {
for idx := 1; idx < len(path); idx++ {
newBkt = bkt.Bucket([]byte(path[idx]))
if newBkt == nil {
return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], "/"))
}
}
bkt = newBkt
}
// newBkt should have the last bucket in the path
berr = bkt.ForEach(func(k, v []byte) error {
if v == nil {
// Must be a bucket
ret = append(ret, string(k))
}
return nil
})
return berr
})
return ret, err
}
// GetKeyList returns a list of all keys at path
func (b *DB) GetKeyList(path []string) ([]string, error) {
var err error
var ret []string
err = b.localDB.Update(func(tx *bolt.Tx) error {
bkt := tx.Bucket([]byte(path[0]))
if bkt == nil {
return fmt.Errorf("Couldn't find bucket " + path[0])
}
if len(path) > 1 {
var newBkt *bolt.Bucket
for idx := 1; idx < len(path); idx++ {
newBkt = bkt.Bucket([]byte(path[idx]))
if newBkt == nil {
return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], "/"))
}
}
bkt = newBkt
}
// newBkt should have the last bucket in the path
berr := bkt.ForEach(func(k, v []byte) error {
if v != nil {
// Not a bucket
ret = append(ret, string(k))
}
return nil
})
return berr
})
return ret, err
}
// DeletePair deletes the pair with key at path
func (b *DB) DeletePair(path []string, key string) error {
var err error
err = b.localDB.Update(func(tx *bolt.Tx) error {
bkt := tx.Bucket([]byte(path[0]))
if bkt == nil {
return fmt.Errorf("Couldn't find bucket " + path[0])
}
if len(path) > 1 {
var newBkt *bolt.Bucket
for idx := 1; idx < len(path); idx++ {
newBkt = bkt.Bucket([]byte(path[idx]))
if newBkt == nil {
return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], "/"))
}
}
bkt = newBkt
}
// bkt should have the last bucket in the path
// Test to make sure that key is a pair, if so, delete it
if tst := bkt.Bucket([]byte(key)); tst == nil {
return bkt.Delete([]byte(key))
}
return nil
})
return err
}
// DeleteBucket deletes the bucket key at path
func (b *DB) DeleteBucket(path []string, key string) error {
var err error
err = b.localDB.Update(func(tx *bolt.Tx) error {
bkt := tx.Bucket([]byte(path[0]))
if bkt == nil {
return fmt.Errorf("Couldn't find bucket " + path[0])
}
var newBkt *bolt.Bucket
for idx := 1; idx < len(path); idx++ {
newBkt = bkt.Bucket([]byte(path[idx]))
if newBkt == nil {
return fmt.Errorf("Couldn't find bucket " + strings.Join(path[:idx], "/"))
}
}
// newBkt should have the last bucket in the path
// Test to make sure that key is a bucket, if so, delete it
if tst := newBkt.Bucket([]byte(key)); tst != nil {
return newBkt.Delete([]byte(key))
}
return nil
})
return err
}