Add high-level godoc for publisher and consumer

doc.go

@@ -0,0 +1,74 @@
+/*
+Package nsq is the official Go package for NSQ (http://nsq.io/).
+
+It provides high-level Consumer and Producer types as well as low-level
+functions to communicate over the NSQ protocol.
+
+Consumer
+
+Consuming messages from NSQ can be done by creating an instance of a Consumer and supplying it a handler.
+
+	type myMessageHandler struct {}
+
+	// HandleMessage implements the Handler interface.
+	func (h *myMessageHandler) HandleMessage(m *nsq.Message) error {
+		if len(m.Body) == 0 {
+			// Returning nil will automatically send a FIN command to NSQ to mark the message as processed.
+			return nil
+		}
+
+		err := processMessage(m.Body)
+
+		// Returning a non-nil error will automatically send a REQ command to NSQ to re-queue the message.
+		return err
+	}
+
+	func main() {
+		// Instantiate a consumer that will subscribe to the provided channel.
+		config := nsq.NewConfig()
+		consumer, err := nsq.NewConsumer("topic", "channel", config)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		// Set the Handler for messages received by this Consumer. Can be called multiple times.
+		// See also AddConcurrentHandlers.
+		consumer.AddHandler(&myMessageHandler{})
+
+		// Use nsqlookupd to discover nsqd instances.
+		// See also ConnectToNSQD, ConnectToNSQDs, ConnectToNSQLookupds.
+		err = consumer.ConnectToNSQLookupd("localhost:4161")
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		// Gracefully stop the consumer.
+		consumer.Stop()
+	}
+
+Producer
+
+Producing messages can be done by creating an instance of a Producer.
+
+	// Instantiate a producer.
+	config := nsq.NewConfig()
+	producer, err := nsq.NewProducer("127.0.0.1:4150", config)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	messageBody := []byte("hello")
+	topicName := "topic"
+
+	// Synchronously publish a single message to the specified topic.
+	// Messages can also be sent asynchronously and/or in batches.
+	err = p.Publish(topicName, messageBody)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// Gracefully stop the producer.
+	producer.Stop()
+
+*/
+package nsq

version.go

@@ -1,7 +1,3 @@
-// Package nsq is the official Go package for NSQ (http://nsq.io/)
-//
-// It provides high-level Consumer and Producer types as well as low-level
-// functions to communicate over the NSQ protocol
 package nsq
 
 // VERSION