Implementing the producer side and breaking out common topology bits

sylvilagus/go/Makefile

@@ -2,7 +2,8 @@ CLEAN_GOPATH := $(shell echo $(GOPATH) | tr ":" "\n" | grep -v '^$$' | grep -v $
 GOPATH := $(PWD):$(CLEAN_GOPATH)
 PACKAGES := \
 	meatballhat.com/sylvilagus-conntest \
-	meatballhat.com/sylvilagus-chapter02-hello-world-consumer
+	meatballhat.com/sylvilagus-chapter02-hello-world-consumer \
+	meatballhat.com/sylvilagus-chapter02-hello-world-producer
 
 export GOPATH
 

sylvilagus/go/src/meatballhat.com/sylvilagus-chapter02-hello-world-consumer/main.go

@@ -6,6 +6,7 @@ import (
 
 import (
 	"github.com/streadway/amqp"
+	"meatballhat.com/sylvilagus"
 )
 
 func main() {
@@ -16,24 +17,9 @@ func main() {
 
 	defer connection.Close()
 
-	channel, err := connection.Channel()
+	channel, err := sylvilagus.CreateHelloTopology(connection)
 	if err != nil {
-		log.Fatal("Failed to get channel!: ", err)
-	}
-
-	err = channel.ExchangeDeclare("hello-exchange", "direct", true, false, false, false, nil)
-	if err != nil {
-		log.Fatal("Failed to declare exchange!: ", err)
-	}
-
-	_, err = channel.QueueDeclare("hello-queue", false, false, false, false, nil)
-	if err != nil {
-		log.Fatal("Failed to declare queue!: ", err)
-	}
-
-	err = channel.QueueBind("hello-queue", "hola", "hello-exchange", false, nil)
-	if err != nil {
-		log.Fatal("Failed to bind to queue!: ", err)
+		log.Fatal("Failed to build topology!: ", err)
 	}
 
 	hellos, err := channel.Consume("hello-queue", "hello-consumer", false, false, false, false, nil)

sylvilagus/go/src/meatballhat.com/sylvilagus-chapter02-hello-world-producer/main.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"log"
+	"os"
+	"time"
+)
+
+import (
+	"github.com/streadway/amqp"
+	"meatballhat.com/sylvilagus"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		log.Fatal("You must provide a message as first arg!")
+	}
+
+	msgBody := string(os.Args[1])
+
+	connection, err := amqp.Dial("amqp://guest:guest@localhost:5672")
+	if err != nil {
+		log.Fatal("Failed to connect!: ", err)
+	}
+
+	defer connection.Close()
+
+	channel, err := sylvilagus.CreateHelloTopology(connection)
+	if err != nil {
+		log.Fatal("Failed to build topology!: ", err)
+	}
+
+	msg := amqp.Publishing{
+		DeliveryMode: amqp.Persistent,
+		Timestamp:    time.Now(),
+		ContentType:  "text/plain",
+		Body:         []byte(msgBody),
+	}
+
+	err = channel.Publish("hello-exchange", "hola", false, false, msg)
+	if err != nil {
+		log.Fatal("Failed to publish message!: ", err)
+	} else {
+		log.Printf("Published '%v'\n", msgBody)
+	}
+}

sylvilagus/go/src/meatballhat.com/sylvilagus/hello.go

@@ -0,0 +1,37 @@
+package sylvilagus
+
+import (
+	"log"
+)
+
+import (
+	"github.com/streadway/amqp"
+)
+
+func CreateHelloTopology(connection *amqp.Connection) (*amqp.Channel, error) {
+	channel, err := connection.Channel()
+	if err != nil {
+		log.Println("Failed to get channel!: ", err)
+		return nil, err
+	}
+
+	err = channel.ExchangeDeclare("hello-exchange", "direct", true, false, false, false, nil)
+	if err != nil {
+		log.Println("Failed to declare exchange!: ", err)
+		return nil, err
+	}
+
+	_, err = channel.QueueDeclare("hello-queue", false, false, false, false, nil)
+	if err != nil {
+		log.Println("Failed to declare queue!: ", err)
+		return nil, err
+	}
+
+	err = channel.QueueBind("hello-queue", "hola", "hello-exchange", false, nil)
+	if err != nil {
+		log.Println("Failed to bind to queue!: ", err)
+		return nil, err
+	}
+
+	return channel, nil
+}