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Feature: Add RabbitMQ and Kafka Messaging for comparison
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| package rabbitmq_client | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
| "stockbackend/types" | ||
|
|
||
| "encoding/json" | ||
|
|
||
| "github.com/streadway/amqp" | ||
| "go.uber.org/zap" | ||
| ) | ||
|
|
||
| var ( | ||
| Connection *amqp.Connection | ||
| Channel *amqp.Channel | ||
| Queue amqp.Queue | ||
| ) | ||
|
|
||
| // GetEnv retrieves the environment variable with a default value if not set. | ||
| func GetEnv(key, defaultValue string) string { | ||
| value := os.Getenv(key) | ||
| if value == "" { | ||
| return defaultValue | ||
| } | ||
| return value | ||
| } | ||
|
|
||
| func Close() { | ||
| Channel.Close() | ||
| Connection.Close() | ||
| } | ||
|
|
||
| func SendMessage(event types.StockbackendEvent) { | ||
| message, err := json.Marshal(event) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| zap.L().Sugar().Infof("Sending message to rabbitmq: %s", message) | ||
|
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| // 4. Publish a message to the queue | ||
| err = Channel.Publish( | ||
| "", // Exchange (empty means default) | ||
| Queue.Name, // Routing key (queue name in this case) | ||
| false, // Mandatory | ||
| false, // Immediate | ||
| amqp.Publishing{ | ||
| ContentType: "application/json", | ||
| Body: []byte(message), | ||
| }) | ||
|
|
||
| if err != nil { | ||
| zap.L().Error("Error publishing message to rabbitmq: ", zap.Any("error", err.Error())) | ||
| return | ||
| } | ||
|
|
||
| zap.L().Info("Successfully sent message to rabbitmq.") | ||
| } | ||
|
|
||
| func init() { | ||
| logger, err := zap.NewProductionConfig().Build() | ||
| if err != nil { | ||
| panic("oh noes!") | ||
| } | ||
|
|
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| zap.ReplaceGlobals(logger) | ||
|
|
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| // 1. Connect to RabbitMQ server | ||
| rabbitServer := GetEnv("RABBITMQ_SERVER", "localhost") | ||
| rabbitPort := GetEnv("RABBITMQ_PORT", "5672") | ||
| rabbitUser := GetEnv("RABBITMQ_USER", "guest") | ||
| rabbitPass := GetEnv("RABBITMQ_PASS", "guest") | ||
|
|
||
| zap.L().Sugar().Infof("RabbitMQ Server: %s", rabbitServer) | ||
| zap.L().Sugar().Infof("RabbitMQ Port: %s", rabbitPort) | ||
| zap.L().Sugar().Infof("RabbitMQ User: %s", rabbitUser) | ||
| zap.L().Sugar().Debugf("RabbitMQ Pass: %s", rabbitPass) | ||
|
|
||
| newConn, err := amqp.Dial(fmt.Sprintf("amqp://%s:%s@%s:%s/", rabbitUser, rabbitPass, rabbitServer, rabbitPort)) | ||
| if err != nil { | ||
| zap.L().Error("RabbitMQ initialization failed: ", zap.Any("error", err.Error())) | ||
| } | ||
| Connection = newConn | ||
|
|
||
| // 2. Create a channel | ||
| ch, err := Connection.Channel() | ||
| if err != nil { | ||
| zap.L().Error("RabbitMQ - Failed to open a channel: ", zap.Any("error", err.Error())) | ||
| } | ||
|
|
||
| Channel = ch | ||
|
|
||
| // 3. Declare a queue to ensure it exists before publishing messages | ||
| queueName := "stockbackend" | ||
| q, err := ch.QueueDeclare( | ||
| queueName, // Name of the queue | ||
| true, // Durable | ||
| false, // Delete when unused | ||
| false, // Exclusive | ||
| false, // No-wait | ||
| nil, // Arguments | ||
| ) | ||
| if err != nil { | ||
| zap.L().Error("RabbitMQ - Failed to declare a queue: ", zap.Any("error", err.Error())) | ||
| } | ||
|
|
||
| Queue = q | ||
|
|
||
| zap.L().Info("Connected to RabbitMQ.") | ||
| } |
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