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Work on pkg/connection and pkg/writer
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1,29 @@ | ||
| package connection | ||
|
|
||
| import ( | ||
| "context" | ||
| "github.com/sirupsen/logrus" | ||
| "go.mongodb.org/mongo-driver/mongo" | ||
| "go.mongodb.org/mongo-driver/mongo/options" | ||
| "go.mongodb.org/mongo-driver/mongo/readpref" | ||
| "log" | ||
| "time" | ||
| ) | ||
|
|
||
| func CreateMongoClient(uri string) (client *mongo.Client, err error) { | ||
| ctx, cancel := context.WithTimeout(context.TODO(), 2*time.Second) | ||
| defer cancel() | ||
|
|
||
| client, err = mongo.Connect(ctx, options.Client().ApplyURI(uri).SetAppName("Rei")) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| if err := client.Ping(ctx, readpref.Primary()); err != nil { | ||
| logrus.Fatalf("connection couldn't be established: %v", err) | ||
| return nil, err | ||
| } | ||
|
|
||
| println("Connected to MongoDB with URI", uri) | ||
| return client, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| package writer | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "github.com/sirupsen/logrus" | ||
| "go.mongodb.org/mongo-driver/bson" | ||
| "go.mongodb.org/mongo-driver/mongo" | ||
| "io/ioutil" | ||
| ) | ||
|
|
||
| func WriteDocumentsToFile(file string, collection *mongo.Collection) error { | ||
| var results []bson.M | ||
| cursor, err := collection.Find(context.TODO(), bson.M{}) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| for cursor.Next(context.TODO()) { | ||
| val := bson.M{} | ||
| err := cursor.Decode(&val) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| results = append(results, val) | ||
| } | ||
| bytes, err := json.Marshal(results) | ||
| err = ioutil.WriteFile(file, bytes, 0644) | ||
| if err != nil { | ||
| logrus.Fatalf("Failed to write file %s: %v", file, err) | ||
| } | ||
| return nil | ||
| } |