119 lines
2.2 KiB
Go
119 lines
2.2 KiB
Go
// Package etcd is an etcd v3 implementation of kv
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package etcd
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import (
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"context"
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"log"
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client "github.com/coreos/etcd/clientv3"
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"github.com/coreos/etcd/mvcc/mvccpb"
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"github.com/micro/go-micro/config/options"
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"github.com/micro/go-micro/store"
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)
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type ekv struct {
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options.Options
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kv client.KV
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}
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func (e *ekv) Read(keys ...string) ([]*store.Record, error) {
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var values []*mvccpb.KeyValue
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for _, key := range keys {
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keyval, err := e.kv.Get(context.Background(), key)
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if err != nil {
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return nil, err
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}
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if keyval == nil || len(keyval.Kvs) == 0 {
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return nil, store.ErrNotFound
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}
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values = append(values, keyval.Kvs...)
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}
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records := make([]*store.Record, 0, len(values))
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for _, kv := range values {
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records = append(records, &store.Record{
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Key: string(kv.Key),
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Value: kv.Value,
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// TODO: implement expiry
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})
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}
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return records, nil
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}
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func (e *ekv) Delete(keys ...string) error {
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var gerr error
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for _, key := range keys {
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_, err := e.kv.Delete(context.Background(), key)
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if err != nil {
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gerr = err
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}
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}
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return gerr
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}
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func (e *ekv) Write(records ...*store.Record) error {
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var gerr error
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for _, record := range records {
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// TODO create lease to expire keys
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_, err := e.kv.Put(context.Background(), record.Key, string(record.Value))
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if err != nil {
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gerr = err
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}
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}
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return gerr
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}
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func (e *ekv) List() ([]*store.Record, error) {
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keyval, err := e.kv.Get(context.Background(), "/", client.WithPrefix())
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if err != nil {
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return nil, err
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}
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var vals []*store.Record
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if keyval == nil || len(keyval.Kvs) == 0 {
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return vals, nil
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}
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for _, keyv := range keyval.Kvs {
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vals = append(vals, &store.Record{
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Key: string(keyv.Key),
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Value: keyv.Value,
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})
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}
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return vals, nil
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}
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func (e *ekv) String() string {
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return "etcd"
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}
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func NewStore(opts ...options.Option) store.Store {
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options := options.NewOptions(opts...)
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var endpoints []string
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if e, ok := options.Values().Get("store.nodes"); ok {
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endpoints = e.([]string)
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}
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if len(endpoints) == 0 {
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endpoints = []string{"http://127.0.0.1:2379"}
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}
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// TODO: parse addresses
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c, err := client.New(client.Config{
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Endpoints: endpoints,
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})
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if err != nil {
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log.Fatal(err)
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}
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return &ekv{
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Options: options,
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kv: client.NewKV(c),
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}
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}
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