/
mongowrap.go
109 lines (88 loc) · 2.34 KB
/
mongowrap.go
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package mongowrap
import (
"context"
"encoding/json"
"io/ioutil"
"log"
"time"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
type Config struct {
URI string `json:"uri"`
UserName string `json:"user_name"`
Password string `json:"password"`
}
type MongoConn struct {
ctx context.Context
cancelFunc context.CancelFunc
client *mongo.Client
}
func NewMongoConn() *MongoConn {
conn := &MongoConn{}
// context의 timeout 시간이 짧으면 context deadline exceeded 에러 발생합니다.
conn.ctx, conn.cancelFunc = context.WithTimeout(context.Background(), 30*time.Second)
conn.client = nil
return conn
}
func (c *MongoConn) Close() {
c.cancelFunc()
}
func (c *MongoConn) Connect(config *Config) (*mongo.Client, error) {
clientOptions := options.Client().ApplyURI(config.URI).SetAuth(options.Credential{
AuthSource: "",
Username: config.UserName,
Password: config.Password,
})
// mongodb 연결
client, err := mongo.Connect(c.ctx, clientOptions)
if err != nil {
log.Fatal(err)
return nil, err
}
// 연결 검증
err = client.Ping(context.Background(), nil)
if err != nil {
log.Fatal(err)
return nil, err
}
log.Println("Connect Ok.", "User:", config.UserName, "URI:", config.URI)
c.client = client
return client, nil
}
// GetCollection은 mongdb접속 정보에서 지정한 db의 collection 정보를 구합니다.
func (c *MongoConn) getCollection(db, collection string) *mongo.Collection {
return c.client.Database(db).Collection(collection)
}
func (c *MongoConn) Find(findCol *FindCollection) error {
collection := c.getCollection(findCol.DBName, findCol.CollectionName)
cursor, err := collection.Find(c.ctx, findCol.Query)
if err != nil {
log.Fatal(err)
return err
}
if err = cursor.All(c.ctx, &findCol.Document); err != nil {
log.Fatal(err)
return err
}
return nil
}
// LoadSetting은 mongdb를 접속하기 위해한 URI와 계정정보를 파일에서 읽습니다.
func LoadDBSetting(file string) *Config {
b, err := ioutil.ReadFile(file)
if err != nil {
log.Fatal(err)
}
// byte -> string
str := string(b)
var config Config
json.Unmarshal([]byte(str), &config)
return &config
}
type FindCollection struct {
DBName string
CollectionName string
Query bson.M
Document []bson.M
}