Add PublishWithRoutingKey func to Publisher.

Author: williambailey

publisher.go

@@ -17,6 +17,7 @@ type PublisherOpt func(*Publisher)
 type publishMaybeErr struct {
 	pub chan amqp.Publishing
 	err chan error
+	key string
 }
 
 // Publisher hold definition for AMQP publishing
@@ -43,14 +44,15 @@ func (p *Publisher) Write(b []byte) (int, error) {
 	return len(b), p.Publish(pub)
 }
 
-// Publish used to publish custom amqp.Publishing
+// PublishWithRoutingKey used to publish custom amqp.Publishing and routing key
 //
 // WARNING: this is blocking call, it will not return until connection is
 // available. The only way to stop it is to use Cancel() method.
-func (p *Publisher) Publish(pub amqp.Publishing) error {
+func (p *Publisher) PublishWithRoutingKey(pub amqp.Publishing, key string) error {
 	reqRepl := publishMaybeErr{
 		pub: make(chan amqp.Publishing, 2),
 		err: make(chan error, 2),
+		key: key,
 	}
 
 	reqRepl.pub <- pub
@@ -66,6 +68,14 @@ func (p *Publisher) Publish(pub amqp.Publishing) error {
 	return err
 }
 
+// Publish used to publish custom amqp.Publishing
+//
+// WARNING: this is blocking call, it will not return until connection is
+// available. The only way to stop it is to use Cancel() method.
+func (p *Publisher) Publish(pub amqp.Publishing) error {
+	return p.PublishWithRoutingKey(pub, p.key)
+}
+
 // Cancel this publisher
 func (p *Publisher) Cancel() {
 	p.m.Lock()
@@ -93,11 +103,11 @@ func (p *Publisher) serve(client mqDeleter, ch mqChannel) {
 			msg := <-envelop.pub
 			close(envelop.pub)
 			if err := ch.Publish(
-				p.exchange, // exchange
-				p.key,      // key
-				false,      // mandatory
-				false,      // immediate
-				msg,        // msg amqp.Publishing
+				p.exchange,  // exchange
+				envelop.key, // key
+				false,       // mandatory
+				false,       // immediate
+				msg,         // msg amqp.Publishing
 			); err != nil {
 				envelop.err <- err
 			}

publisher_test.go

@@ -66,11 +66,13 @@ func TestPublisher_Cancel_willNotBlock(t *testing.T) {
 
 func TestPublisher_serve(t *testing.T) {
 	var (
-		runSync     = make(chan bool)
-		deleted     bool
-		closed      bool
-		notifyClose bool
-		testMsg     *amqp.Publishing
+		runSync      = make(chan bool)
+		deleted      bool
+		closed       bool
+		notifyClose  bool
+		exchangeName string
+		routingKey   string
+		testMsg      *amqp.Publishing
 	)
 
 	p := newTestPublisher()
@@ -90,6 +92,8 @@ func TestPublisher_serve(t *testing.T) {
 			return errChan
 		},
 		_Publish: func(ex string, key string, mandatory bool, immediate bool, msg amqp.Publishing) error {
+			exchangeName = ex
+			routingKey = key
 			testMsg = &msg
 			return nil
 		},
@@ -118,6 +122,85 @@ func TestPublisher_serve(t *testing.T) {
 		t.Error("should close channel")
 	}
 
+	if exchangeName != "exchange.name" {
+		t.Error("should set correct routing key")
+	}
+
+	if routingKey != "routing.key" {
+		t.Error("should set correct routing key")
+	}
+
+	if bytes.Compare(testMsg.Body, []byte("test1")) != 0 {
+		t.Error("should publish correct messaged")
+	}
+}
+
+func TestPublisher_serve_customRoutingKey(t *testing.T) {
+	var (
+		runSync      = make(chan bool)
+		deleted      bool
+		closed       bool
+		notifyClose  bool
+		exchangeName string
+		routingKey   string
+		testMsg      *amqp.Publishing
+	)
+
+	p := newTestPublisher()
+	cli := &mqDeleterTest{
+		_deletePublisher: func(*Publisher) {
+			deleted = true
+		},
+	}
+
+	ch1 := &mqChannelTest{
+		_Close: func() error {
+			closed = true
+			return nil
+		},
+		_NotifyClose: func(errChan chan *amqp.Error) chan *amqp.Error {
+			notifyClose = true
+			return errChan
+		},
+		_Publish: func(ex string, key string, mandatory bool, immediate bool, msg amqp.Publishing) error {
+			exchangeName = ex
+			routingKey = key
+			testMsg = &msg
+			return nil
+		},
+	}
+
+	go func() {
+		<-runSync
+		p.serve(cli, ch1)
+		runSync <- true
+	}()
+
+	runSync <- true
+	p.PublishWithRoutingKey(amqp.Publishing{Body: []byte("test1")}, "my.routing.key")
+	p.Cancel()
+	<-runSync
+
+	if !notifyClose {
+		t.Error("should register notifyClose")
+	}
+
+	if !deleted {
+		t.Error("should delete publisher")
+	}
+
+	if !closed {
+		t.Error("should close channel")
+	}
+
+	if exchangeName != "exchange.name" {
+		t.Error("should set correct routing key")
+	}
+
+	if routingKey != "my.routing.key" {
+		t.Error("should set correct routing key")
+	}
+
 	if bytes.Compare(testMsg.Body, []byte("test1")) != 0 {
 		t.Error("should publish correct messaged")
 	}
@@ -270,5 +353,5 @@ func TestPublishingTemplate(t *testing.T) {
 }
 
 func newTestPublisher(opts ...PublisherOpt) *Publisher {
-	return NewPublisher("", "", opts...)
+	return NewPublisher("exchange.name", "routing.key", opts...)
 }