/
http.go
158 lines (131 loc) · 3.47 KB
/
http.go
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package transports
import (
"encoding/json"
"fmt"
"github.com/SimonRichardson/coherence/pkg/api"
"github.com/SimonRichardson/coherence/pkg/api/client"
"github.com/SimonRichardson/coherence/pkg/selectors"
"github.com/spaolacci/murmur3"
)
type httpTransport struct {
hash uint32
client *client.Client
}
// NewHTTPTransport creates a new Transport that uses the HTTP protocol
func NewHTTPTransport(client *client.Client) api.Transport {
return &httpTransport{
hash: murmur3.Sum32([]byte(client.Host())),
client: client,
}
}
func (t *httpTransport) Insert(key selectors.Key, fields []selectors.FieldValueScore) (selectors.ChangeSet, error) {
return t.write("insert", key, fields)
}
func (t *httpTransport) Delete(key selectors.Key, fields []selectors.FieldValueScore) (selectors.ChangeSet, error) {
return t.write("delete", key, fields)
}
func (t *httpTransport) Select(key selectors.Key, field selectors.Field) (record selectors.FieldValueScore, err error) {
var res []byte
res, err = t.client.Get(fmt.Sprintf("/store/select?key=%s&field=%s", key.String(), field.String()))
if err != nil {
return
}
var fieldValueScore struct {
Records selectors.FieldValueScore `json:"records"`
}
if err = json.Unmarshal(res, &fieldValueScore); err != nil {
return
}
record = fieldValueScore.Records
return
}
func (t *httpTransport) Keys() (record []selectors.Key, err error) {
var res []byte
res, err = t.client.Get("/store/keys")
if err != nil {
return
}
var keys struct {
Records []selectors.Key `json:"records"`
}
if err = json.Unmarshal(res, &keys); err != nil {
return
}
record = keys.Records
return
}
func (t *httpTransport) Size(key selectors.Key) (record int64, err error) {
var res []byte
res, err = t.client.Get(fmt.Sprintf("/store/size?key=%s", key.String()))
if err != nil {
return
}
var size struct {
Records int64 `json:"records"`
}
if err = json.Unmarshal(res, &size); err != nil {
return
}
record = size.Records
return
}
func (t *httpTransport) Members(key selectors.Key) (record []selectors.Field, err error) {
var res []byte
res, err = t.client.Get(fmt.Sprintf("/store/members?key=%s", key.String()))
if err != nil {
return
}
var members struct {
Records []selectors.Field `json:"records"`
}
if err = json.Unmarshal(res, &members); err != nil {
return
}
record = members.Records
return
}
func (t *httpTransport) Score(key selectors.Key, field selectors.Field) (record selectors.Presence, err error) {
var res []byte
res, err = t.client.Get(fmt.Sprintf("/store/score?key=%s&field=%s", key.String(), field.String()))
if err != nil {
return
}
var score struct {
Records selectors.Presence `json:"records"`
}
if err = json.Unmarshal(res, &score); err != nil {
return
}
record = score.Records
return
}
func (t *httpTransport) write(path string, key selectors.Key, fields []selectors.FieldValueScore) (record selectors.ChangeSet, err error) {
var b []byte
b, err = json.Marshal(struct {
Members []selectors.FieldValueScore `json:"members"`
}{
Members: fields,
})
if err != nil {
return
}
var res []byte
res, err = t.client.Post(fmt.Sprintf("/store/%s?key=%s", path, key.String()), b)
if err != nil {
return
}
var changeset struct {
Records selectors.ChangeSet `json:"records"`
}
if err = json.Unmarshal(res, &changeset); err != nil {
return
}
record = changeset.Records
return
}
func (t *httpTransport) Hash() uint32 {
return t.hash
}
func (t *httpTransport) Host() string {
return t.client.Host()
}