-
Notifications
You must be signed in to change notification settings - Fork 470
/
firestore.go
209 lines (173 loc) · 5.28 KB
/
firestore.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
/*
Copyright 2021 The Dapr Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package firestore
import (
"context"
"encoding/json"
"errors"
"fmt"
"reflect"
"cloud.google.com/go/datastore"
jsoniter "github.com/json-iterator/go"
"google.golang.org/api/option"
"github.com/dapr/components-contrib/metadata"
"github.com/dapr/components-contrib/state"
"github.com/dapr/kit/logger"
)
const defaultEntityKind = "DaprState"
// Firestore State Store.
type Firestore struct {
state.DefaultBulkStore
client *datastore.Client
entityKind string
noIndex bool
logger logger.Logger
}
type firestoreMetadata struct {
Type string `json:"type"`
ProjectID string `json:"project_id" mapstructure:"project_id"`
PrivateKeyID string `json:"private_key_id" mapstructure:"private_key_id"`
PrivateKey string `json:"private_key" mapstructure:"private_key"`
ClientEmail string `json:"client_email" mapstructure:"client_email"`
ClientID string `json:"client_id" mapstructure:"client_id"`
AuthURI string `json:"auth_uri" mapstructure:"auth_uri"`
TokenURI string `json:"token_uri" mapstructure:"token_uri"`
AuthProviderCertURL string `json:"auth_provider_x509_cert_url" mapstructure:"auth_provider_x509_cert_url"`
ClientCertURL string `json:"client_x509_cert_url" mapstructure:"client_x509_cert_url"`
EntityKind string `json:"entity_kind" mapstructure:"entity_kind"`
NoIndex bool `json:"-"`
}
type StateEntity struct {
Value string
}
type StateEntityNoIndex struct {
Value string `datastore:",noindex"`
}
func NewFirestoreStateStore(logger logger.Logger) state.Store {
s := &Firestore{logger: logger}
s.DefaultBulkStore = state.NewDefaultBulkStore(s)
return s
}
// Init does metadata and connection parsing.
func (f *Firestore) Init(metadata state.Metadata) error {
meta, err := getFirestoreMetadata(metadata)
if err != nil {
return err
}
b, err := json.Marshal(meta)
if err != nil {
return err
}
opt := option.WithCredentialsJSON(b)
ctx := context.Background()
client, err := datastore.NewClient(ctx, meta.ProjectID, opt)
if err != nil {
return err
}
f.client = client
f.entityKind = meta.EntityKind
f.noIndex = meta.NoIndex
return nil
}
// Features returns the features available in this state store.
func (f *Firestore) Features() []state.Feature {
return nil
}
// Get retrieves state from Firestore with a key (Always strong consistency).
func (f *Firestore) Get(ctx context.Context, req *state.GetRequest) (*state.GetResponse, error) {
key := req.Key
entityKey := datastore.NameKey(f.entityKind, key, nil)
var entity StateEntity
err := f.client.Get(ctx, entityKey, &entity)
if err != nil && !errors.Is(err, datastore.ErrNoSuchEntity) {
return nil, err
} else if errors.Is(err, datastore.ErrNoSuchEntity) {
return &state.GetResponse{}, nil
}
return &state.GetResponse{
Data: []byte(entity.Value),
}, nil
}
// Set saves state into Firestore.
func (f *Firestore) Set(ctx context.Context, req *state.SetRequest) error {
err := state.CheckRequestOptions(req.Options)
if err != nil {
return err
}
var v string
b, ok := req.Value.([]byte)
if ok {
v = string(b)
} else {
v, _ = jsoniter.MarshalToString(req.Value)
}
var entity interface{}
if f.noIndex {
entity = &StateEntityNoIndex{
Value: v,
}
} else {
entity = &StateEntity{
Value: v,
}
}
key := datastore.NameKey(f.entityKind, req.Key, nil)
_, err = f.client.Put(ctx, key, entity)
if err != nil {
return err
}
return nil
}
// Delete performs a delete operation.
func (f *Firestore) Delete(ctx context.Context, req *state.DeleteRequest) error {
key := datastore.NameKey(f.entityKind, req.Key, nil)
err := f.client.Delete(ctx, key)
if err != nil {
return err
}
return nil
}
func getFirestoreMetadata(meta state.Metadata) (*firestoreMetadata, error) {
m := firestoreMetadata{
EntityKind: defaultEntityKind,
}
err := metadata.DecodeMetadata(meta.Properties, &m)
if err != nil {
return nil, err
}
requiredMetaProperties := []string{
"type", "project_id", "private_key_id", "private_key", "client_email", "client_id",
"auth_uri", "token_uri", "auth_provider_x509_cert_url", "client_x509_cert_url",
}
metadataMap := map[string]string{}
bytes, err := json.Marshal(m)
if err != nil {
return nil, err
}
err = json.Unmarshal(bytes, &metadataMap)
if err != nil {
return nil, err
}
for _, k := range requiredMetaProperties {
if val, ok := metadataMap[k]; !ok || len(val) < 1 {
return nil, fmt.Errorf("error parsing required field: %s", k)
}
}
return &m, nil
}
func (f *Firestore) GetComponentMetadata() map[string]string {
metadataStruct := firestoreMetadata{}
metadataInfo := map[string]string{}
metadata.GetMetadataInfoFromStructType(reflect.TypeOf(metadataStruct), &metadataInfo)
return metadataInfo
}