Producing to ui queue works

Together with Arjan.

Makefile

@@ -33,3 +33,19 @@ linux: # Build for linux
 
 run:
 	./builds/main
+
+develop:
+	# RabbitMQ env variables
+	$(eval export RABBIT_USER := guest)
+	$(eval export RABBIT_PASSWORD := guest)
+	$(eval export RABBIT_HOST := localhost)
+	$(eval export RABBIT_PORT := 5672)
+
+	# Whether to log
+	$(eval export LOG_MESSAGES := true)
+
+	# Redis env variables
+	$(eval export REDIS_ADDRESS := localhost:6379)
+
+	@go run cmd/query-service/main.go
+

cmd/query-service/main.go

 package main
 
 import (
-	"fmt"
+	"context"
+	"log"
 	"query-service/internal/aql"
-	"query-service/internal/consumer"
 	"query-service/internal/errorhandler"
+	"query-service/internal/messagequeue"
+	"query-service/internal/redisclient"
+
+	"github.com/streadway/amqp"
+	"github.com/thijsheijden/alice"
 )
 
-func main() {
+var producer alice.Producer
 
+func main() {
 	exchangeID := "query-requests"
 	routingKey := "aql-user-request"
-	consumer.StartConsuming(onMessageReceived, exchangeID, routingKey)
+
+	broker := messagequeue.Create()
+	messagequeue.StartConsumer(broker, &exchangeID, &routingKey, onMessageReceived)
+
+	producer = messagequeue.StartProducer(broker)
+
+	redisclient.Start()
+
+	select {}
 }
 
-func onMessageReceived(jsonMsg *[]byte) {
+func onMessageReceived(msg amqp.Delivery) {
 	// Retrieve JSON formatted string payload from msg
 
 	// Convert the json byte msg to an aql query string
-	aqlQuery, err := aql.ConvertJSONToAQL(jsonMsg)
+	aqlQuery, err := aql.ConvertJSONToAQL(&msg.Body)
 	errorhandler.FailWithError(err, "failed to parse incoming msg to AQL") // TODO: don't panic on error, send error message to client instead
 
-	fmt.Println(*aqlQuery)
+	// Get the queueID for this sessionID
+	sessionID, ok := msg.Headers["sessionID"].(string)
+	if !ok {
+		log.Println("No sessionID passed in message")
+		return
+	}
+
+	// Get queueID for this client
+	queueID := redisclient.Conn.Get(context.Background(), sessionID).Val()
+	log.Println(queueID)
+
+	// producer.PublishMessage(aqlQuery, , &amqp.Table{})
 
 	// execute and retrieve result
 
 	// convert result to general (node-link (?)) format
 
 	// publish converted result
+	headers := amqp.Table{}
+	headers["sessionID"] = sessionID
+	headers["type"] = "schemaResult"
+	log.Println("publishing message")
+	producer.PublishMessage(aqlQuery, &queueID, &headers)
+	msg.Ack(true)
 }

deployments/deployment.yml

@@ -28,5 +28,7 @@ spec:
           value: I9YPuqNYvN_o4597-LJ6i0sWZTDTV5kk
         - name: RABBIT_PASSWORD
           value: zBA4m-IzK6ejLtCdr2gxB6kHmURaUvy4
+        - name: REDIS_ADDRESS
+          value: redis.redis.svc.cluster.local:6379
       imagePullSecrets:
       - name: docker-regcred
\ No newline at end of file

go.mod

@@ -3,7 +3,8 @@ module query-service
 go 1.15
 
 require (
+	github.com/go-redis/redis/v8 v8.8.0
 	github.com/streadway/amqp v1.0.0
-	github.com/stretchr/testify v1.7.0 // indirect
-	github.com/thijsheijden/alice v0.1.5
+	github.com/stretchr/testify v1.7.0
+	github.com/thijsheijden/alice v0.1.8
 )

go.sum

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internal/messagequeue/broker.go

+package messagequeue
+
+import (
+	"os"
+	"query-service/internal/errorhandler"
+	"strconv"
+	"time"
+
+	"github.com/thijsheijden/alice"
+)
+
+// Create creates a broker
+func Create() *alice.RabbitBroker {
+	// Create connection config using environment variables
+	rabbitUser := os.Getenv("RABBIT_USER")
+	rabbitPassword := os.Getenv("RABBIT_PASSWORD")
+	rabbitHost := os.Getenv("RABBIT_HOST")
+	rabbitPort, err := strconv.Atoi(os.Getenv("RABBIT_PORT"))
+	if err != nil {
+		errorhandler.FailWithError(err, "port should be a number")
+	}
+
+	config := alice.CreateConfig(rabbitUser, rabbitPassword, rabbitHost, rabbitPort, true, time.Minute*1, alice.DefaultErrorHandler)
+
+	broker := alice.CreateBroker(config)
+	return broker
+}

internal/consumer/consumer.go → internal/messagequeue/consumer.go

-package consumer
+package messagequeue
 
 import (
-	"os"
 	"query-service/internal/errorhandler"
-	"strconv"
-	"time"
 
 	"github.com/streadway/amqp"
 	"github.com/thijsheijden/alice"
 )
 
 // ConsumeMessageFunc is a function type to be called when a message is consumed
-type ConsumeMessageFunc func(*[]byte)
+type ConsumeMessageFunc func(amqp.Delivery)
 
-// StartConsuming will start consuming messages
+// StartConsumer will start a consumer
 // When a message is received the consumeMessage function will be called
-func StartConsuming(consumeMessage ConsumeMessageFunc, exchangeID string, routingKey string) {
-
-	// Create connection config using environment variables
-	rabbitUser := os.Getenv("RABBIT_USER")
-	rabbitPassword := os.Getenv("RABBIT_PASSWORD")
-	rabbitHost := os.Getenv("RABBIT_HOST")
-	rabbitPort, err := strconv.Atoi(os.Getenv("RABBIT_PORT"))
-
-	config := alice.CreateConfig(rabbitUser, rabbitPassword, rabbitHost, rabbitPort, true, time.Minute*1, alice.DefaultErrorHandler)
-
-	// Open connection to broker
-	conn := alice.Connect(*config)
-
+func StartConsumer(broker *alice.RabbitBroker, exchangeID *string, routingKey *string, consumeMessage ConsumeMessageFunc) {
 	// Declare the exchange we want to bind to
-	exchange, err := alice.CreateDefaultExchange(exchangeID, alice.Direct)
+	exchange, err := alice.CreateDefaultExchange(*exchangeID, alice.Direct)
 	if err != nil {
 		errorhandler.FailWithError(err, "failed to create exchange")
 	}
@@ -38,11 +23,11 @@ func StartConsuming(consumeMessage ConsumeMessageFunc, exchangeID string, routin
 	queue := alice.CreateQueue(exchange, "", true, false, true, false, nil)
 
 	// Create the consumer
-	c, err := conn.CreateConsumer(queue, routingKey, alice.DefaultConsumerErrorHandler)
+	c, err := broker.CreateConsumer(queue, *routingKey, alice.DefaultConsumerErrorHandler)
 	if err != nil {
 		errorhandler.FailWithError(err, "failed to create consumer")
 	}
 
 	// Start consuming messages
-	c.ConsumeMessages(nil, false, func(msg amqp.Delivery) { consumeMessage(&msg.Body) })
+	go c.ConsumeMessages(nil, false, func(msg amqp.Delivery) { consumeMessage(msg) })
 }

internal/messagequeue/producer.go

+package messagequeue
+
+import (
+	"query-service/internal/errorhandler"
+
+	"github.com/thijsheijden/alice"
+)
+
+// StartProducer starts a producer and returns it
+func StartProducer(broker *alice.RabbitBroker) alice.Producer {
+	exchange, err := alice.CreateDefaultExchange("ui-direct-exchange", alice.Direct)
+	if err != nil {
+		errorhandler.FailWithError(err, "failed to create exchange for producer")
+	}
+
+	producer, err := broker.CreateProducer(exchange, alice.DefaultProducerErrorHandler)
+	if err != nil {
+		errorhandler.FailWithError(err, "failed to created producer")
+	}
+
+	return producer
+}

internal/redisclient/redis.go

+package redisclient
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/go-redis/redis/v8"
+)
+
+// Conn is the redis connection
+var Conn *redis.Client
+
+// Start starts the redis client
+func Start() {
+	// Grab the redis host and port from environment vars
+	redisAddress := os.Getenv("REDIS_ADDRESS")
+	// redisPassword := os.Getenv("REDIS_PASSWORD")
+
+	// Create redis client
+	Conn = redis.NewClient(&redis.Options{
+		Addr: redisAddress,
+	})
+
+	pong := Conn.Ping(context.Background())
+	log.Printf(fmt.Sprintf("%v", pong))
+}