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bucket.go
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/
bucket.go
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package riak
import (
"github.com/cupcake/go-riak/pb"
)
// Implements access to a bucket and its properties
type Bucket struct {
name string
client *Client
nval uint32
allowMult bool
}
// Return a bucket
func (c *Client) Bucket(name string) (bucket *Bucket, err error) {
for i := 0; i < 3; i++ {
req := &pb.RpbGetBucketReq{
Bucket: []byte(name),
}
var conn conn
err, conn = c.request(req, rpbGetBucketReq)
if err != nil {
continue
}
resp := &pb.RpbGetBucketResp{}
err = c.response(conn, resp)
if err != nil {
continue
}
bucket = &Bucket{name: name, client: c, nval: *resp.Props.NVal, allowMult: *resp.Props.AllowMult}
return bucket, nil
}
return nil, err
}
// Return the nval property of a bucket
func (b *Bucket) NVal() uint32 {
return b.nval
}
// Return the allowMult property of a bucket
func (b *Bucket) AllowMult() bool {
return b.allowMult
}
// Set the nval property of a bucket
func (b *Bucket) SetNVal(nval uint32) (err error) {
props := &pb.RpbBucketProps{NVal: &nval, AllowMult: &b.allowMult}
req := &pb.RpbSetBucketReq{Bucket: []byte(b.name), Props: props}
err, conn := b.client.request(req, rpbSetBucketReq)
if err != nil {
return err
}
err = b.client.response(conn, req)
if err != nil {
return err
}
b.nval = nval
return nil
}
// Set the allowMult property of a bucket
func (b *Bucket) SetAllowMult(allowMult bool) (err error) {
props := &pb.RpbBucketProps{NVal: &b.nval, AllowMult: &allowMult}
req := &pb.RpbSetBucketReq{Bucket: []byte(b.name), Props: props}
err, conn := b.client.request(req, rpbSetBucketReq)
if err != nil {
return err
}
err = b.client.response(conn, req)
if err != nil {
return err
}
b.allowMult = allowMult
return nil
}
// Delete a key/value from the bucket
func (b *Bucket) Delete(key string, options ...map[string]uint32) (err error) {
req := &pb.RpbDelReq{Bucket: []byte(b.name), Key: []byte(key)}
for _, omap := range options {
for k, v := range omap {
switch k {
case "r":
req.R = &v
case "pr":
req.Pr = &v
case "rq":
req.Rw = &v
case "w":
req.W = &v
case "dw":
req.Dw = &v
case "pw":
req.Pw = &v
}
}
}
err, conn := b.client.request(req, rpbDelReq)
if err != nil {
return err
}
err = b.client.response(conn, req)
if err != nil {
return err
}
return nil
}
// Create a new RObject
func (b *Bucket) New(key string, options ...map[string]uint32) *RObject {
obj := &RObject{Key: key, Bucket: b,
Links: make([]Link, 0),
Meta: make(map[string]string), Indexes: make(map[string]string),
Options: options}
return obj
}
// Test if an object exists
func (b *Bucket) Exists(key string, options ...map[string]uint32) (exists bool, err error) {
t := true
req := &pb.RpbGetReq{
Bucket: []byte(b.name),
Key: []byte(key),
NotfoundOk: &t,
Head: &t}
for _, omap := range options {
for k, v := range omap {
switch k {
case "r":
req.R = &v
case "pr":
req.Pr = &v
}
}
}
err, conn := b.client.request(req, rpbGetReq)
if err != nil {
return false, err
}
resp := &pb.RpbGetResp{}
err = b.client.response(conn, resp)
if err != nil {
return false, err
}
return len(resp.Content) != 0, nil
}
// Return a list of keys using the index for a single key
func (b *Bucket) IndexQuery(index string, key string) (keys []string, err error) {
req := &pb.RpbIndexReq{Bucket: []byte(b.name), Index: []byte(index),
Qtype: pb.RpbIndexReq_eq.Enum(), Key: []byte(key)}
err, conn := b.client.request(req, rpbIndexReq)
if err != nil {
return nil, err
}
resp := &pb.RpbIndexResp{}
err = b.client.response(conn, resp)
if err != nil {
return nil, err
}
keys = make([]string, len(resp.Keys))
for i, v := range resp.Keys {
keys[i] = string(v)
}
return
}
// Return a list of keys using the index range query
func (b *Bucket) IndexQueryRange(index string, min string, max string) (keys []string, err error) {
req := &pb.RpbIndexReq{Bucket: []byte(b.name), Index: []byte(index),
Qtype: pb.RpbIndexReq_range.Enum(),
RangeMin: []byte(min), RangeMax: []byte(max)}
err, conn := b.client.request(req, rpbIndexReq)
if err != nil {
return nil, err
}
resp := &pb.RpbIndexResp{}
err = b.client.response(conn, resp)
if err != nil {
return nil, err
}
keys = make([]string, len(resp.Keys))
for i, v := range resp.Keys {
keys[i] = string(v)
}
return
}
// List all keys from bucket
func (b *Bucket) ListKeys() (response [][]byte, err error) {
req := &pb.RpbListKeysReq{Bucket: []byte(b.name)}
err, conn := b.client.request(req, rpbListKeysReq)
if err != nil {
return nil, err
}
return b.client.mp_response(conn)
}