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From acon...@apache.org
Subject [19/50] [abbrv] qpid-proton git commit: PROTON-827: go binding: enable use of 'go get', reorganize packages names and layout.
Date Mon, 28 Sep 2015 18:09:45 GMT
PROTON-827: go binding: enable use of 'go get', reorganize packages names and layout.

Based on better understanding of Go workspaces and go get.

- bindings/go directory holds source, NOT the workspace.
- added go-import <meta> tags and stubs on qpid site to enable `go get qpid.apache.org/proton/go/...`
- added go symlink in root of proton repo for shorter package names
- renamed package imports qpid.apache.org/proton/go/...
- updated README.md files
- renamed branch "go" to "go1", go get will pick up this branch.


Project: http://git-wip-us.apache.org/repos/asf/qpid-proton/repo
Commit: http://git-wip-us.apache.org/repos/asf/qpid-proton/commit/6ea3649d
Tree: http://git-wip-us.apache.org/repos/asf/qpid-proton/tree/6ea3649d
Diff: http://git-wip-us.apache.org/repos/asf/qpid-proton/diff/6ea3649d

Branch: refs/heads/proton-go
Commit: 6ea3649dfa1f2c3ce220ea46c9ff6eae4e88fa35
Parents: 333a2b2
Author: Alan Conway <aconway@redhat.com>
Authored: Wed May 13 13:26:43 2015 -0400
Committer: Alan Conway <aconway@redhat.com>
Committed: Mon Sep 28 14:08:22 2015 -0400

----------------------------------------------------------------------
 examples/go/README.md                       |  92 +++
 examples/go/event/broker.go                 | 255 ++++++++
 examples/go/example_test.go                 | 272 +++++++++
 examples/go/receive.go                      |  16 +-
 examples/go/send.go                         |  10 +-
 go                                          |   1 +
 proton-c/bindings/go/README.md              | 138 +++++
 proton-c/bindings/go/amqp/doc.go            |  40 ++
 proton-c/bindings/go/amqp/interop           |   1 +
 proton-c/bindings/go/amqp/interop_test.go   | 308 ++++++++++
 proton-c/bindings/go/amqp/marshal.go        | 238 ++++++++
 proton-c/bindings/go/amqp/message.go        | 342 +++++++++++
 proton-c/bindings/go/amqp/message_test.go   |  90 +++
 proton-c/bindings/go/amqp/types.go          | 193 ++++++
 proton-c/bindings/go/amqp/uid.go            |  40 ++
 proton-c/bindings/go/amqp/unmarshal.go      | 552 +++++++++++++++++
 proton-c/bindings/go/amqp/url.go            |  96 +++
 proton-c/bindings/go/amqp/url_test.go       |  51 ++
 proton-c/bindings/go/event/doc.go           |  38 ++
 proton-c/bindings/go/event/handlers.go      | 411 +++++++++++++
 proton-c/bindings/go/event/message.go       |  75 +++
 proton-c/bindings/go/event/pump.go          | 357 +++++++++++
 proton-c/bindings/go/event/wrappers.go      | 253 ++++++++
 proton-c/bindings/go/event/wrappers_gen.go  | 732 +++++++++++++++++++++++
 proton-c/bindings/go/internal/error.go      | 125 ++++
 proton-c/bindings/go/messaging/doc.go       |  28 +
 proton-c/bindings/go/messaging/handler.go   |  70 +++
 proton-c/bindings/go/messaging/messaging.go | 250 ++++++++
 28 files changed, 5061 insertions(+), 13 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/examples/go/README.md
----------------------------------------------------------------------
diff --git a/examples/go/README.md b/examples/go/README.md
new file mode 100644
index 0000000..8acef36
--- /dev/null
+++ b/examples/go/README.md
@@ -0,0 +1,92 @@
+# Go examples for proton
+
+There are 3 go packages for proton:
+
+- qpid.apache.org/proton/go/amqp: converts AMQP messages and data types to and from Go data types.
+- qpid.apache.org/proton/go/messaging: easy-to-use, concurrent API for messaging clients and servers.
+- qpid.apache.org/proton/go/event: full low-level access to the proton engine.
+
+Most applications should use the `messaging` package. The `event` package is for
+applications that need low-level access to the proton engine.
+
+## messaging examples
+
+- [receive.go](receive.go) receive from many connections concurrently.
+- [send.go](send.go) send to many connections concurrently.
+
+## event examples
+
+- [broker.go](event/broker.go) simple mini-broker, queues are created automatically.
+
+## Installing the proton Go packages
+
+You need to install proton in a standard place such as `/usr` or `/usr/local` so go
+can find the proton C headers and libraries to build the C parts of the packages.
+
+You should create a go workspace and set GOPATH as described in https://golang.org/doc/code.html
+
+To get the proton packages into your workspace you can clone the proton repository like this:
+
+    git clone https://git.apache.org/qpid-proton.git $GOPATH/src/qpid.apache.org/proton
+
+If you prefer to keep your proton clone elsewhere you can create a symlink to it in your workspace.
+
+You can also use `go get` as follows:
+
+    go get qpid.apache.org/proton/go/messaging
+
+Once installed you can use godoc to look at docmentation on the commane line or start a
+godoc web server like this:
+
+	godoc -http=:6060
+
+And look at the docs in your browser.
+
+Right now the layout of the documentation is a bit messed up, showing the long
+path for imports, i.e.
+
+    qpid.apache.org/proton/proton-c/bindings/go/amqp
+
+In your code you should use:
+
+    qpid.apache.org/proton/go/amqp
+
+
+## Running the examples
+
+You can run the examples directly from source like this:
+
+    go run <program>.go
+
+This is a little slow (a couple of seconds) as it compiles the program and runs it in one step.
+You can compile the program first and then run the executable to avoid the delay:
+
+    go build <program>.go
+    ./<program>
+
+All the examples take a `-h` flag to show usage information, and the comments in
+the example source have more details.
+
+First start the broker:
+
+    go run event/broker.go
+
+Send messages concurrently to queues "foo" and "bar", 10 messages to each queue:
+
+    go run go/send.go -count 10 localhost:/foo localhost:/bar
+
+Receive messages concurrently from "foo" and "bar". Note -count 20 for 10 messages each on 2 queues:
+
+    go run go/receive.go -count 20 localhost:/foo localhost:/bar
+
+The broker and clients use the amqp port on the local host by default, to use a
+different address use the `-addr host:port` flag.
+
+You can mix it up by running the Go clients with the python broker:
+
+    python ../python/broker.py
+
+Or use the Go broker and the python clients:
+
+    python ../python/simple_send.py
+    python ../python/simple_recv.py`.

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/examples/go/event/broker.go
----------------------------------------------------------------------
diff --git a/examples/go/event/broker.go b/examples/go/event/broker.go
new file mode 100644
index 0000000..0cb4bfa
--- /dev/null
+++ b/examples/go/event/broker.go
@@ -0,0 +1,255 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+*/
+
+//
+// This is a simple AMQP broker implemented using the event-handler interface.
+//
+// It maintains a set of named in-memory queues of messages. Clients can send
+// messages to queues or subscribe to receive messages from them.
+//
+//
+
+package main
+
+import (
+	"container/list"
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"net"
+	"os"
+	"path"
+	"qpid.apache.org/proton/go/amqp"
+	"qpid.apache.org/proton/go/event"
+	"sync"
+)
+
+// Command-line flags
+var addr = flag.String("addr", ":amqp", "Listening address")
+var verbose = flag.Int("verbose", 1, "Output level, 0 means none, higher means more")
+var full = flag.Bool("full", false, "Print full message not just body.")
+
+func main() {
+	flag.Usage = func() {
+		fmt.Fprintf(os.Stderr, `
+Usage: %s
+A simple broker-like demo. Queues are created automatically for sender or receiver addrsses.
+`, os.Args[0])
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+	b := newBroker()
+	err := b.listen(*addr)
+	fatalIf(err)
+}
+
+// queue is a structure representing a queue.
+type queue struct {
+	name      string              // Name of queue
+	messages  *list.List          // List of event.Message
+	consumers map[event.Link]bool // Set of consumer links
+}
+
+type logLink event.Link // Wrapper to print links in format for logging
+
+func (ll logLink) String() string {
+	l := event.Link(ll)
+	return fmt.Sprintf("%s[%p]", l.Name(), l.Session().Connection().Pump())
+}
+
+func (q *queue) subscribe(link event.Link) {
+	debug.Printf("link %s subscribed to queue %s", logLink(link), q.name)
+	q.consumers[link] = true
+}
+
+func (q *queue) unsubscribe(link event.Link) {
+	debug.Printf("link %s unsubscribed from queue %s", logLink(link), q.name)
+	delete(q.consumers, link)
+}
+
+func (q *queue) empty() bool {
+	return len(q.consumers) == 0 && q.messages.Len() == 0
+}
+
+func (q *queue) push(context *event.Pump, message amqp.Message) {
+	q.messages.PushBack(message)
+	q.pop(context)
+}
+
+func (q *queue) popTo(context *event.Pump, link event.Link) bool {
+	if q.messages.Len() != 0 && link.Credit() > 0 {
+		message := q.messages.Remove(q.messages.Front()).(amqp.Message)
+		debug.Printf("link %s <- queue %s: %s", logLink(link), q.name, formatMessage{message})
+		// The first return parameter is an event.Delivery.
+		// The Deliver can be used to track message status, e.g. so we can re-delver on failure.
+		// This demo broker doesn't do that.
+		linkPump := link.Session().Connection().Pump()
+		if context == linkPump {
+			if context == nil {
+				log.Fatal("pop in nil context")
+			}
+			link.Send(message) // link is in the current pump, safe to call Send() direct
+		} else {
+			linkPump.Inject <- func() { // Inject to link's pump
+				link.Send(message) // FIXME aconway 2015-05-04: error handlig
+			}
+		}
+		return true
+	}
+	return false
+}
+
+func (q *queue) pop(context *event.Pump) (popped bool) {
+	for c, _ := range q.consumers {
+		popped = popped || q.popTo(context, c)
+	}
+	return
+}
+
+// broker implements event.MessagingHandler and reacts to events by moving messages on or off queues.
+type broker struct {
+	queues map[string]*queue
+	lock   sync.Mutex // FIXME aconway 2015-05-04: un-golike, better broker coming...
+}
+
+func newBroker() *broker {
+	return &broker{queues: make(map[string]*queue)}
+}
+
+func (b *broker) getQueue(name string) *queue {
+	q := b.queues[name]
+	if q == nil {
+		debug.Printf("Create queue %s", name)
+		q = &queue{name, list.New(), make(map[event.Link]bool)}
+		b.queues[name] = q
+	}
+	return q
+}
+
+func (b *broker) unsubscribe(l event.Link) {
+	if l.IsSender() {
+		q := b.queues[l.RemoteSource().Address()]
+		if q != nil {
+			q.unsubscribe(l)
+			if q.empty() {
+				debug.Printf("Delete queue %s", q.name)
+				delete(b.queues, q.name)
+			}
+		}
+	}
+}
+
+func (b *broker) HandleMessagingEvent(t event.MessagingEventType, e event.Event) error {
+	// FIXME aconway 2015-05-04: locking is un-golike, better example coming soon.
+	// Needed because the same handler is used for multiple connections concurrently
+	// and the queue data structures are not thread safe.
+	b.lock.Lock()
+	defer b.lock.Unlock()
+
+	switch t {
+
+	case event.MLinkOpening:
+		if e.Link().IsSender() {
+			q := b.getQueue(e.Link().RemoteSource().Address())
+			q.subscribe(e.Link())
+		}
+
+	case event.MLinkDisconnected, event.MLinkClosing:
+		b.unsubscribe(e.Link())
+
+	case event.MSendable:
+		q := b.getQueue(e.Link().RemoteSource().Address())
+		q.popTo(e.Connection().Pump(), e.Link())
+
+	case event.MMessage:
+		m, err := event.DecodeMessage(e)
+		fatalIf(err)
+		qname := e.Link().RemoteTarget().Address()
+		debug.Printf("link %s -> queue %s: %s", logLink(e.Link()), qname, formatMessage{m})
+		b.getQueue(qname).push(e.Connection().Pump(), m)
+	}
+	return nil
+}
+
+func (b *broker) listen(addr string) (err error) {
+	// Use the standard Go "net" package to listen for connections.
+	listener, err := net.Listen("tcp", addr)
+	if err != nil {
+		return err
+	}
+	info.Printf("Listening on %s", listener.Addr())
+	defer listener.Close()
+	for {
+		conn, err := listener.Accept()
+		if err != nil {
+			info.Printf("Accept error: %s", err)
+			continue
+		}
+		pump, err := event.NewPump(conn, event.NewMessagingDelegator(b))
+		fatalIf(err)
+		info.Printf("Accepted %s[%p]", pump, pump)
+		pump.Server()
+		go func() {
+			pump.Run()
+			if pump.Error == nil {
+				info.Printf("Closed %s", pump)
+			} else {
+				info.Printf("Closed %s: %s", pump, pump.Error)
+			}
+		}()
+	}
+}
+
+// Logging
+func logger(prefix string, level int, w io.Writer) *log.Logger {
+	if *verbose >= level {
+		return log.New(w, prefix, 0)
+	}
+	return log.New(ioutil.Discard, "", 0)
+}
+
+var info, debug *log.Logger
+
+func init() {
+	flag.Parse()
+	name := path.Base(os.Args[0])
+	log.SetFlags(0)
+	log.SetPrefix(fmt.Sprintf("%s: ", name))                      // Log errors on stderr.
+	info = logger(fmt.Sprintf("%s: ", name), 1, os.Stdout)        // Log info on stdout.
+	debug = logger(fmt.Sprintf("%s debug: ", name), 2, os.Stderr) // Log debug on stderr.
+}
+
+// Simple error handling for demo.
+func fatalIf(err error) {
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+type formatMessage struct{ m amqp.Message }
+
+func (fm formatMessage) String() string {
+	if *full {
+		return fmt.Sprintf("%#v", fm.m)
+	} else {
+		return fmt.Sprintf("%#v", fm.m.Body())
+	}
+}

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/examples/go/example_test.go
----------------------------------------------------------------------
diff --git a/examples/go/example_test.go b/examples/go/example_test.go
new file mode 100644
index 0000000..e059c28
--- /dev/null
+++ b/examples/go/example_test.go
@@ -0,0 +1,272 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+*/
+
+// Tests to verify that example code behaves as expected.
+// Run in this directory with `go test example_test.go`
+//
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"math/rand"
+	"net"
+	"os"
+	"os/exec"
+	"path"
+	"path/filepath"
+	"reflect"
+	"testing"
+	"time"
+)
+
+func panicIf(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+// A demo broker process
+type broker struct {
+	cmd    *exec.Cmd
+	addr   string
+	runerr chan error
+	err    error
+}
+
+// Try to connect to the broker to verify it is ready, give up after a timeout
+func (b *broker) check() error {
+	dialer := net.Dialer{Deadline: time.Now().Add(time.Second * 10)}
+	for {
+		c, err := dialer.Dial("tcp", b.addr)
+		if err == nil { // Success
+			c.Close()
+			return nil
+		}
+		select {
+		case runerr := <-b.runerr: // Broker exited.
+			return runerr
+		default:
+		}
+		if neterr, ok := err.(net.Error); ok && neterr.Timeout() { // Running but timed out
+			b.stop()
+			return fmt.Errorf("timed out waiting for broker")
+		}
+		time.Sleep(time.Second / 10)
+	}
+}
+
+// Start the demo broker, wait till it is listening on *addr. No-op if already started.
+func (b *broker) start() error {
+	build("event/broker.go")
+	if b.cmd == nil { // Not already started
+		// FIXME aconway 2015-04-30: better way to pick/configure a broker port.
+		b.addr = fmt.Sprintf("127.0.0.1:%d", rand.Intn(10000)+10000)
+		b.cmd = exec.Command(exepath("broker"), "-addr", b.addr, "-verbose", "0")
+		b.runerr = make(chan error)
+		// Change the -verbose setting above to see broker output on stdout/stderr.
+		b.cmd.Stderr, b.cmd.Stdout = os.Stderr, os.Stdout
+		go func() {
+			b.runerr <- b.cmd.Run()
+		}()
+		b.err = b.check()
+	}
+	return b.err
+}
+
+func (b *broker) stop() {
+	if b != nil && b.cmd != nil {
+		b.cmd.Process.Kill()
+		b.cmd.Wait()
+	}
+}
+
+func checkEqual(want interface{}, got interface{}) error {
+	if reflect.DeepEqual(want, got) {
+		return nil
+	}
+	return fmt.Errorf("%#v != %#v", want, got)
+}
+
+// runCommand returns an exec.Cmd to run an example.
+func exampleCommand(prog string, arg ...string) *exec.Cmd {
+	build(prog + ".go")
+	cmd := exec.Command(exepath(prog), arg...)
+	cmd.Stderr = os.Stderr
+	return cmd
+}
+
+// Run an example Go program, return the combined output as a string.
+func runExample(prog string, arg ...string) (string, error) {
+	cmd := exampleCommand(prog, arg...)
+	out, err := cmd.Output()
+	return string(out), err
+}
+
+func prefix(prefix string, err error) error {
+	if err != nil {
+		return fmt.Errorf("%s: %s", prefix, err)
+	}
+	return nil
+}
+
+func runExampleWant(want string, prog string, args ...string) error {
+	out, err := runExample(prog, args...)
+	if err != nil {
+		return fmt.Errorf("%s failed: %s: %s", prog, err, out)
+	}
+	return prefix(prog, checkEqual(want, out))
+}
+
+func exampleArgs(args ...string) []string {
+	return append(args, testBroker.addr+"/foo", testBroker.addr+"/bar", testBroker.addr+"/baz")
+}
+
+// Send then receive
+func TestExampleSendReceive(t *testing.T) {
+	if testing.Short() {
+		t.Skip("Skip demo tests in short mode")
+	}
+	testBroker.start()
+	err := runExampleWant(
+		"send: Received all 15 acknowledgements\n",
+		"send",
+		exampleArgs("-count", "5", "-verbose", "1")...)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = runExampleWant(
+		"receive: Listening\nreceive: Received 15 messages\n",
+		"receive",
+		exampleArgs("-verbose", "1", "-count", "15")...)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+var ready error
+
+func init() { ready = fmt.Errorf("Ready") }
+
+// Run receive in a goroutine.
+// Send ready on errchan when it is listening.
+// Send final error when it is done.
+// Returns the Cmd, caller must Wait()
+func goReceiveWant(errchan chan<- error, want string, arg ...string) *exec.Cmd {
+	cmd := exampleCommand("receive", arg...)
+	go func() {
+		pipe, err := cmd.StdoutPipe()
+		if err != nil {
+			errchan <- err
+			return
+		}
+		out := bufio.NewReader(pipe)
+		cmd.Start()
+		line, err := out.ReadString('\n')
+		if err != nil && err != io.EOF {
+			errchan <- err
+			return
+		}
+		listening := "receive: Listening\n"
+		if line != listening {
+			errchan <- checkEqual(listening, line)
+			return
+		}
+		errchan <- ready
+		buf := bytes.Buffer{}
+		io.Copy(&buf, out) // Collect the rest of the output
+		errchan <- checkEqual(want, buf.String())
+		close(errchan)
+	}()
+	return cmd
+}
+
+// Start receiver first, wait till it is running, then send.
+func TestExampleReceiveSend(t *testing.T) {
+	if testing.Short() {
+		t.Skip("Skip demo tests in short mode")
+	}
+	testBroker.start()
+	recvErr := make(chan error)
+	recvCmd := goReceiveWant(recvErr,
+		"receive: Received 15 messages\n",
+		exampleArgs("-count", "15", "-verbose", "1")...)
+	defer func() {
+		recvCmd.Process.Kill()
+		recvCmd.Wait()
+	}()
+	if err := <-recvErr; err != ready { // Wait for receiver ready
+		t.Fatal(err)
+	}
+	err := runExampleWant(
+		"send: Received all 15 acknowledgements\n",
+		"send",
+		exampleArgs("-count", "5", "-verbose", "1")...)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := <-recvErr; err != nil {
+		t.Fatal(err)
+	}
+}
+
+func exepath(relative string) string {
+	if binDir == "" {
+		panic("bindir not set, cannot run example binaries")
+	}
+	return path.Join(binDir, relative)
+}
+
+var testBroker *broker
+var binDir, exampleDir string
+var built map[string]bool
+
+func init() {
+	built = make(map[string]bool)
+}
+
+func build(prog string) {
+	if !built[prog] {
+		build := exec.Command("go", "build", path.Join(exampleDir, prog))
+		build.Dir = binDir
+		out, err := build.CombinedOutput()
+		if err != nil {
+			panic(fmt.Errorf("%v: %s", err, out))
+		}
+		built[prog] = true
+	}
+}
+
+func TestMain(m *testing.M) {
+	rand.Seed(time.Now().UTC().UnixNano())
+	var err error
+	exampleDir, err = filepath.Abs(".")
+	panicIf(err)
+	binDir, err = ioutil.TempDir("", "example_test.go")
+	panicIf(err)
+	defer os.Remove(binDir) // Clean up binaries
+	testBroker = &broker{}  // Broker is started on-demand by tests.
+	testBroker.stop()
+	status := m.Run()
+	testBroker.stop()
+	os.Exit(status)
+}

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/examples/go/receive.go
----------------------------------------------------------------------
diff --git a/examples/go/receive.go b/examples/go/receive.go
index 2545eab..e31862b 100644
--- a/examples/go/receive.go
+++ b/examples/go/receive.go
@@ -29,8 +29,8 @@ import (
 	"net"
 	"os"
 	"path"
-	"qpid.apache.org/proton"
-	"qpid.apache.org/proton/messaging"
+	"qpid.apache.org/proton/go/amqp"
+	"qpid.apache.org/proton/go/messaging"
 	"sync"
 	"time"
 )
@@ -68,8 +68,8 @@ Receive messages from all the listed URLs concurrently and print them.
 	// Create a goroutine for each URL that receives messages and sends them to
 	// the messages channel. main() receives and prints them.
 
-	messages := make(chan proton.Message) // Channel for messages from goroutines to main()
-	stop := make(chan struct{})           // Closing this channel means the program is stopping.
+	messages := make(chan amqp.Message) // Channel for messages from goroutines to main()
+	stop := make(chan struct{})         // Closing this channel means the program is stopping.
 
 	var wait sync.WaitGroup // Used by main() to wait for all goroutines to end.
 
@@ -88,8 +88,8 @@ Receive messages from all the listed URLs concurrently and print them.
 	for i, urlStr := range urls {
 		debug.Printf("Connecting to %s", urlStr)
 		go func(urlStr string) {
-			defer wait.Done()                   // Notify main() that this goroutine is done.
-			url, err := proton.ParseURL(urlStr) // Like net/url.Parse() but with AMQP defaults.
+			defer wait.Done()                 // Notify main() that this goroutine is done.
+			url, err := amqp.ParseURL(urlStr) // Like net/url.Parse() but with AMQP defaults.
 			fatalIf(err)
 
 			// Open a standard Go net.Conn and and AMQP connection using it.
@@ -104,7 +104,7 @@ Receive messages from all the listed URLs concurrently and print them.
 			fatalIf(err)
 
 			for {
-				var m proton.Message
+				var m amqp.Message
 				select { // Receive a message or stop.
 				case m = <-r.Receive:
 				case <-stop: // The program is stopping.
@@ -163,7 +163,7 @@ func fatalIf(err error) {
 	}
 }
 
-type formatMessage struct{ m proton.Message }
+type formatMessage struct{ m amqp.Message }
 
 func (fm formatMessage) String() string {
 	if *full {

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/examples/go/send.go
----------------------------------------------------------------------
diff --git a/examples/go/send.go b/examples/go/send.go
index c4db7cd..4aaeb43 100644
--- a/examples/go/send.go
+++ b/examples/go/send.go
@@ -29,8 +29,8 @@ import (
 	"net"
 	"os"
 	"path"
-	"qpid.apache.org/proton"
-	"qpid.apache.org/proton/messaging"
+	"qpid.apache.org/proton/go/amqp"
+	"qpid.apache.org/proton/go/messaging"
 	"sync"
 )
 
@@ -85,8 +85,8 @@ To each URL, send the string "path-n" where n is the message number.
 	for i, urlStr := range urls {
 		debug.Printf("Connecting to %v", urlStr)
 		go func(urlStr string) {
-			defer wait.Done()                   // Notify main() that this goroutine is done.
-			url, err := proton.ParseURL(urlStr) // Like net/url.Parse() but with AMQP defaults.
+			defer wait.Done()                 // Notify main() that this goroutine is done.
+			url, err := amqp.ParseURL(urlStr) // Like net/url.Parse() but with AMQP defaults.
 			fatalIf(err)
 
 			// Open a standard Go net.Conn and and AMQP connection using it.
@@ -101,7 +101,7 @@ To each URL, send the string "path-n" where n is the message number.
 			fatalIf(err)
 
 			for i := int64(0); i < *count; i++ {
-				m := proton.NewMessage()
+				m := amqp.NewMessage()
 				body := fmt.Sprintf("%v-%v", url.Path, i)
 				m.SetBody(body)
 				ack, err := s.Send(m)

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/go
----------------------------------------------------------------------
diff --git a/go b/go
new file mode 120000
index 0000000..a4b737d
--- /dev/null
+++ b/go
@@ -0,0 +1 @@
+proton-c/bindings/go
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/proton-c/bindings/go/README.md
----------------------------------------------------------------------
diff --git a/proton-c/bindings/go/README.md b/proton-c/bindings/go/README.md
new file mode 100644
index 0000000..0449d68
--- /dev/null
+++ b/proton-c/bindings/go/README.md
@@ -0,0 +1,138 @@
+# *EXPERIMENTAL* Go binding for proton
+
+This is the beginning of a [Go](http://golang.org) binding for proton.
+
+This work is in early *experimental* stages, *everything* may change in future.
+Comments and contributions are strongly encouraged, this experiment is public so
+early feedback can guide development.
+
+- Email <proton@qpid.apache.org>
+- Create issues <https://issues.apache.org/jira/browse/PROTON>, attach patches to an issue.
+
+There are working [examples](../../../examples/go/README.md) and the examples README file
+explains how to install the packages in your go workspace and read the documentation.
+
+## Goals
+
+The API should
+
+- be idiomatic, unsurprising, and easy to use for Go developers.
+- support client and server development.
+- make simple tasks simple.
+- provide deep access to AMQP protocol when that is required.
+
+There are two types of developer we want to support
+
+1. Go developers using AMQP as a message transport:
+   - Straightforward conversions between Go built-in types and AMQP types.
+   - Easy message exchange via Go channels to support use in goroutines.
+
+2. AMQP-aware developers using Go as an implementation language:
+   - Go types to exactly represent all AMQP types and encoding details.
+   - Full access to detailed AMQP concepts: sessions, links, deliveries etc.
+
+## Status
+
+There are 3 go packages for proton:
+
+- qpid.apache.org/proton/go/amqp: converts AMQP messages and data types to and from Go data types.
+- qpid.apache.org/proton/go/messaging: easy-to-use, concurrent API for messaging clients and servers.
+- qpid.apache.org/proton/go/event: full low-level access to the proton engine.
+
+Most applications should use the `messaging` package. The `event` package is for
+applications that need low-level access to the proton engine.
+
+The `event` package is fairly complete, with the exception of the proton
+reactor. It's unclear if the reactor is important for go.
+
+The `messaging` package can run the examples but probably not much else. There
+is work to do on error handling and the API may change.
+
+There are working [examples](../../../examples/go/README.md) of a broker using `event` and
+a sender and receiver using `messaging`.
+
+## The event driven API
+
+See the package documentation for details.
+
+## The Go API
+
+The goal: A procedural API that allows any user goroutine to send and receive
+AMQP messages and other information (acknowledgments, flow control instructions
+etc.) using channels. There will be no user-visible locks and no need to run
+user code in special goroutines, e.g. as handlers in a proton event loop.
+
+See the package documentation for emerging details.
+
+Currently using a channel to receive messages, a function to send them (channels
+internally) and a channel as a "future" for acknowledgements to senders. This
+may change.
+
+## Why a separate API for Go?
+
+Go is a concurrent language and encourages applications to be divided into
+concurrent *goroutines*. It provides traditional locking but it encourages the
+use *channels* to communicate between goroutines without explicit locks:
+
+  "Share memory by communicating, don't communicate by sharing memory"
+
+The idea is that a given value is only operated on by one goroutine at a time,
+but values can easily be passed from one goroutine to another. This removes much
+of the need for locking.
+
+Go literature distinguishes between:
+
+- *concurrency*: "keeping track of things that could be done in parallel"
+- *parallelism*: "actually doing things in parallel"
+
+The application expresses concurrency by starting goroutines for potentially
+concurrent tasks. The Go run-times schedule the activity of goroutines onto a
+small number (possibly one) of actual parallel executions.
+
+Even with *no* parallelism, concurrency lets the Go run-times *order* work with
+respect to events like file descriptors being readable/writable, channels having
+data, timers firing etc. Go automatically takes care of switching out goroutines
+that block or sleep so it is normal to write code in terms of blocking calls.
+
+Event-driven API (like poll, epoll, select or the proton event API) also
+channel unpredictably ordered events to actions in one or a small pool of
+execution threads. However this requires a different style of programming:
+"event-driven" or "reactive" programming. Go developers call it "inside-out"
+programming. In an event-driven architecture blocking is a big problem as it
+consumes a scarce thread of execution, so actions that take time to complete
+have to be re-structured in terms of future event delivery.
+
+The promise of Go is that you can express your application in concurrent,
+procedural terms with simple blocking calls and the Go run-times will turn it
+inside-out for you. Write as many goroutines as you want, and let Go interleave
+and schedule them efficiently.
+
+For example: the Go equivalent of listening for connections is a goroutine with
+a simple endless loop that calls a blocking Listen() function and starts a
+goroutine for each new connection. Each connection has its own goroutine that
+deals with just that connection till it closes.
+
+The benefit is that the variables and logic live closer together. Once you're in
+a goroutine, you have everything you need in local variables, and they are
+preserved across blocking calls. There's no need to store details in context
+objects that you have to look up when handling a later event to figure out how
+to continue where you left off.
+
+So a Go-like proton API does not force the users code to run in an event-loop
+goroutine. Instead user goroutines communicate with the event loop(s) via
+channels.  There's no need to funnel connections into one event loop, in fact it
+makes no sense.  Connections can be processed concurrently so they should be
+processed in separate goroutines and left to Go to schedule. User goroutines can
+have simple loops that block channels till messages are available, the user can
+start as many or as few such goroutines as they wish to implement concurrency as
+simple or as complex as they wish. For example blocking request-response
+vs. asynchronous flows of messages and acknowledgments.
+
+## New to Go?
+
+If you are new to Go then these are a good place to start:
+
+- [A Tour of Go](http://tour.golang.org)
+- [Effective Go](http://golang.org/doc/effective_go.html)
+
+Then look at the tools and library docs at <http://golang.org> as you need them.

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/proton-c/bindings/go/amqp/doc.go
----------------------------------------------------------------------
diff --git a/proton-c/bindings/go/amqp/doc.go b/proton-c/bindings/go/amqp/doc.go
new file mode 100644
index 0000000..7c00aa0
--- /dev/null
+++ b/proton-c/bindings/go/amqp/doc.go
@@ -0,0 +1,40 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+*/
+
+/*
+Package amqp encodes and decodes AMQP messages and data as Go types.
+
+It follows the standard 'encoding' libraries pattern. The mapping between AMQP
+and Go types is described in the documentation of the Marshal and Unmarshal
+functions.
+
+The sub-packages 'event' and 'messaging' provide two alternative ways to write
+AMQP clients and servers. 'messaging' is easier for general purpose use. 'event'
+gives complete low-level control of the underlying proton C engine.
+
+AMQP is an open standard for inter-operable message exchange, see <http://www.amqp.org/>
+*/
+package amqp
+
+// #cgo LDFLAGS: -lqpid-proton
+import "C"
+
+// This file is just for the package comment.
+
+// FIXME aconway 2015-04-28: need to re-organize the package, it's not very intuitive.

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/proton-c/bindings/go/amqp/interop
----------------------------------------------------------------------
diff --git a/proton-c/bindings/go/amqp/interop b/proton-c/bindings/go/amqp/interop
new file mode 120000
index 0000000..8f50d0e
--- /dev/null
+++ b/proton-c/bindings/go/amqp/interop
@@ -0,0 +1 @@
+../../../../tests/interop
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/proton-c/bindings/go/amqp/interop_test.go
----------------------------------------------------------------------
diff --git a/proton-c/bindings/go/amqp/interop_test.go b/proton-c/bindings/go/amqp/interop_test.go
new file mode 100644
index 0000000..11049f7
--- /dev/null
+++ b/proton-c/bindings/go/amqp/interop_test.go
@@ -0,0 +1,308 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+*/
+
+// Test that conversion of Go type to/from AMQP is compatible with other
+// bindings.
+//
+package amqp
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"reflect"
+	"strings"
+	"testing"
+)
+
+func assertEqual(want interface{}, got interface{}) {
+	if !reflect.DeepEqual(want, got) {
+		panic(fmt.Errorf("%#v != %#v", want, got))
+	}
+}
+
+func assertNil(err interface{}) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+func getReader(name string) (r io.Reader) {
+	r, err := os.Open("interop/" + name + ".amqp")
+	if err != nil {
+		panic(fmt.Errorf("Can't open %#v: %v", name, err))
+	}
+	return
+}
+
+func remaining(d *Decoder) string {
+	remainder, _ := ioutil.ReadAll(io.MultiReader(d.Buffered(), d.reader))
+	return string(remainder)
+}
+
+// assertDecode: want is the expected value, gotPtr is a pointer to a
+// instance of the same type for Decode.
+func assertDecode(d *Decoder, want interface{}, gotPtr interface{}) {
+
+	assertNil(d.Decode(gotPtr))
+
+	got := reflect.ValueOf(gotPtr).Elem().Interface()
+	assertEqual(want, got)
+
+	// Try round trip encoding
+	bytes, err := Marshal(want, nil)
+	assertNil(err)
+	n, err := Unmarshal(bytes, gotPtr)
+	assertNil(err)
+	assertEqual(n, len(bytes))
+	got = reflect.ValueOf(gotPtr).Elem().Interface()
+	assertEqual(want, got)
+}
+
+func TestUnmarshal(t *testing.T) {
+	bytes, err := ioutil.ReadAll(getReader("strings"))
+	if err != nil {
+		t.Error(err)
+	}
+	for _, want := range []string{"abc\000defg", "abcdefg", "abcdefg", "", "", ""} {
+		var got string
+		n, err := Unmarshal(bytes, &got)
+		if err != nil {
+			t.Error(err)
+		}
+		if want != got {
+			t.Errorf("%#v != %#v", want, got)
+		}
+		bytes = bytes[n:]
+	}
+}
+
+func TestPrimitivesExact(t *testing.T) {
+	d := NewDecoder(getReader("primitives"))
+	// Decoding into exact types
+	var b bool
+	assertDecode(d, true, &b)
+	assertDecode(d, false, &b)
+	var u8 uint8
+	assertDecode(d, uint8(42), &u8)
+	var u16 uint16
+	assertDecode(d, uint16(42), &u16)
+	var i16 int16
+	assertDecode(d, int16(-42), &i16)
+	var u32 uint32
+	assertDecode(d, uint32(12345), &u32)
+	var i32 int32
+	assertDecode(d, int32(-12345), &i32)
+	var u64 uint64
+	assertDecode(d, uint64(12345), &u64)
+	var i64 int64
+	assertDecode(d, int64(-12345), &i64)
+	var f32 float32
+	assertDecode(d, float32(0.125), &f32)
+	var f64 float64
+	assertDecode(d, float64(0.125), &f64)
+}
+
+func TestPrimitivesCompatible(t *testing.T) {
+	d := NewDecoder(getReader("primitives"))
+	// Decoding into compatible types
+	var b bool
+	var i int
+	var u uint
+	var f float64
+	assertDecode(d, true, &b)
+	assertDecode(d, false, &b)
+	assertDecode(d, uint(42), &u)
+	assertDecode(d, uint(42), &u)
+	assertDecode(d, -42, &i)
+	assertDecode(d, uint(12345), &u)
+	assertDecode(d, -12345, &i)
+	assertDecode(d, uint(12345), &u)
+	assertDecode(d, -12345, &i)
+	assertDecode(d, 0.125, &f)
+	assertDecode(d, 0.125, &f)
+}
+
+// assertDecodeValue: want is the expected value, decode into a reflect.Value
+func assertDecodeInterface(d *Decoder, want interface{}) {
+
+	var got, got2 interface{}
+	assertNil(d.Decode(&got))
+
+	assertEqual(want, got)
+
+	// Try round trip encoding
+	bytes, err := Marshal(got, nil)
+	assertNil(err)
+	n, err := Unmarshal(bytes, &got2)
+	assertNil(err)
+	assertEqual(n, len(bytes))
+	assertEqual(want, got2)
+}
+
+func TestPrimitivesInterface(t *testing.T) {
+	d := NewDecoder(getReader("primitives"))
+	assertDecodeInterface(d, true)
+	assertDecodeInterface(d, false)
+	assertDecodeInterface(d, uint8(42))
+	assertDecodeInterface(d, uint16(42))
+	assertDecodeInterface(d, int16(-42))
+	assertDecodeInterface(d, uint32(12345))
+	assertDecodeInterface(d, int32(-12345))
+	assertDecodeInterface(d, uint64(12345))
+	assertDecodeInterface(d, int64(-12345))
+	assertDecodeInterface(d, float32(0.125))
+	assertDecodeInterface(d, float64(0.125))
+}
+
+func TestStrings(t *testing.T) {
+	d := NewDecoder(getReader("strings"))
+	// Test decoding as plain Go strings
+	for _, want := range []string{"abc\000defg", "abcdefg", "abcdefg", "", "", ""} {
+		var got string
+		assertDecode(d, want, &got)
+	}
+	remains := remaining(d)
+	if remains != "" {
+		t.Errorf("leftover: %s", remains)
+	}
+
+	// Test decoding as specific string types
+	d = NewDecoder(getReader("strings"))
+	var bytes []byte
+	var str, sym string
+	assertDecode(d, []byte("abc\000defg"), &bytes)
+	assertDecode(d, "abcdefg", &str)
+	assertDecode(d, "abcdefg", &sym)
+	assertDecode(d, make([]byte, 0), &bytes)
+	assertDecode(d, "", &str)
+	assertDecode(d, "", &sym)
+	remains = remaining(d)
+	if remains != "" {
+		t.Fatalf("leftover: %s", remains)
+	}
+
+	// Test some error handling
+	d = NewDecoder(getReader("strings"))
+	var s string
+	err := d.Decode(s)
+	if err == nil {
+		t.Fatal("Expected error")
+	}
+	if !strings.Contains(err.Error(), "not a pointer") {
+		t.Error(err)
+	}
+	var i int
+	err = d.Decode(&i)
+	if !strings.Contains(err.Error(), "cannot unmarshal") {
+		t.Error(err)
+	}
+	_, err = Unmarshal([]byte{}, nil)
+	if !strings.Contains(err.Error(), "not enough data") {
+		t.Error(err)
+	}
+	_, err = Unmarshal([]byte("foobar"), nil)
+	if !strings.Contains(err.Error(), "invalid-argument") {
+		t.Error(err)
+	}
+}
+
+func TestEncodeDecode(t *testing.T) {
+	type data struct {
+		s  string
+		i  int
+		u8 uint8
+		b  bool
+		f  float32
+		v  interface{}
+	}
+
+	in := data{"foo", 42, 9, true, 1.234, "thing"}
+
+	buf := bytes.Buffer{}
+	e := NewEncoder(&buf)
+	assertNil(e.Encode(in.s))
+	assertNil(e.Encode(in.i))
+	assertNil(e.Encode(in.u8))
+	assertNil(e.Encode(in.b))
+	assertNil(e.Encode(in.f))
+	assertNil(e.Encode(in.v))
+
+	var out data
+	d := NewDecoder(&buf)
+	assertNil(d.Decode(&out.s))
+	assertNil(d.Decode(&out.i))
+	assertNil(d.Decode(&out.u8))
+	assertNil(d.Decode(&out.b))
+	assertNil(d.Decode(&out.f))
+	assertNil(d.Decode(&out.v))
+
+	assertEqual(in, out)
+}
+
+func TestMap(t *testing.T) {
+	d := NewDecoder(getReader("maps"))
+
+	// Generic map
+	var m Map
+	assertDecode(d, Map{"one": int32(1), "two": int32(2), "three": int32(3)}, &m)
+
+	// Interface as map
+	var i interface{}
+	assertDecode(d, Map{int32(1): "one", int32(2): "two", int32(3): "three"}, &i)
+
+	d = NewDecoder(getReader("maps"))
+	// Specific typed map
+	var m2 map[string]int
+	assertDecode(d, map[string]int{"one": 1, "two": 2, "three": 3}, &m2)
+
+	// Round trip a nested map
+	m = Map{int64(1): "one", "two": int32(2), true: Map{uint8(1): true, uint8(2): false}}
+	bytes, err := Marshal(m, nil)
+	assertNil(err)
+	_, err = Unmarshal(bytes, &i)
+	assertNil(err)
+	assertEqual(m, i)
+}
+
+func TestList(t *testing.T) {
+	d := NewDecoder(getReader("lists"))
+	var l List
+	assertDecode(d, List{int32(32), "foo", true}, &l)
+	assertDecode(d, List{}, &l)
+}
+
+func FIXMETestMessage(t *testing.T) {
+	// FIXME aconway 2015-04-09: integrate Message encoding under marshal/unmarshal API.
+	bytes, err := ioutil.ReadAll(getReader("message"))
+	assertNil(err)
+	m, err := DecodeMessage(bytes)
+	assertNil(err)
+	fmt.Printf("%+v\n", m)
+	assertEqual(m.Body(), "hello")
+
+	bytes2 := make([]byte, len(bytes))
+	bytes2, err = m.Encode(bytes2)
+	assertNil(err)
+	assertEqual(bytes, bytes2)
+}
+
+// FIXME aconway 2015-03-13: finish the full interop test

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/proton-c/bindings/go/amqp/marshal.go
----------------------------------------------------------------------
diff --git a/proton-c/bindings/go/amqp/marshal.go b/proton-c/bindings/go/amqp/marshal.go
new file mode 100644
index 0000000..e5c2945
--- /dev/null
+++ b/proton-c/bindings/go/amqp/marshal.go
@@ -0,0 +1,238 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+*/
+
+package amqp
+
+// #include <proton/codec.h>
+import "C"
+
+import (
+	"io"
+	"qpid.apache.org/proton/go/internal"
+	"reflect"
+	"unsafe"
+)
+
+func dataError(prefix string, data *C.pn_data_t) error {
+	err := internal.PnError(unsafe.Pointer(C.pn_data_error(data)))
+	if err != nil {
+		err = internal.Errorf("%s: %s", prefix, err.(internal.Error))
+	}
+	return err
+}
+
+/*
+Marshal encodes a Go value as AMQP data in buffer.
+If buffer is nil, or is not large enough, a new buffer  is created.
+
+Returns the buffer used for encoding with len() adjusted to the actual size of data.
+
+Go types are encoded as follows
+
+ +-------------------------------------+--------------------------------------------+
+ |Go type                              |AMQP type                                   |
+ +-------------------------------------+--------------------------------------------+
+ |bool                                 |bool                                        |
+ +-------------------------------------+--------------------------------------------+
+ |int8, int16, int32, int64 (int)      |byte, short, int, long (int or long)        |
+ +-------------------------------------+--------------------------------------------+
+ |uint8, uint16, uint32, uint64 (uint) |ubyte, ushort, uint, ulong (uint or ulong)  |
+ +-------------------------------------+--------------------------------------------+
+ |float32, float64                     |float, double.                              |
+ +-------------------------------------+--------------------------------------------+
+ |string                               |string                                      |
+ +-------------------------------------+--------------------------------------------+
+ |[]byte, Binary                       |binary                                      |
+ +-------------------------------------+--------------------------------------------+
+ |Symbol                               |symbol                                      |
+ +-------------------------------------+--------------------------------------------+
+ |interface{}                          |the contained type                          |
+ +-------------------------------------+--------------------------------------------+
+ |nil                                  |null                                        |
+ +-------------------------------------+--------------------------------------------+
+ |map[K]T                              |map with K and T converted as above         |
+ +-------------------------------------+--------------------------------------------+
+ |Map                                  |map, may have mixed types for keys, values  |
+ +-------------------------------------+--------------------------------------------+
+ |[]T                                  |list with T converted as above              |
+ +-------------------------------------+--------------------------------------------+
+ |List                                 |list, may have mixed types  values          |
+ +-------------------------------------+--------------------------------------------+
+
+TODO Go types: array, slice, struct
+
+Go types that cannot be marshaled: complex64/128, uintptr, function, interface, channel
+*/
+func Marshal(v interface{}, buffer []byte) (outbuf []byte, err error) {
+	defer internal.DoRecover(&err)
+	data := C.pn_data(0)
+	defer C.pn_data_free(data)
+	put(data, v)
+	encode := func(buf []byte) ([]byte, error) {
+		n := int(C.pn_data_encode(data, cPtr(buf), cLen(buf)))
+		switch {
+		case n == int(C.PN_OVERFLOW):
+			return buf, overflow
+		case n < 0:
+			return buf, dataError("marshal error", data)
+		default:
+			return buf[:n], nil
+		}
+	}
+	return encodeGrow(buffer, encode)
+}
+
+const minEncode = 256
+
+// overflow is returned when an encoding function can't fit data in the buffer.
+var overflow = internal.Errorf("buffer too small")
+
+// encodeFn encodes into buffer[0:len(buffer)].
+// Returns buffer with length adjusted for data encoded.
+// If buffer too small, returns overflow as error.
+type encodeFn func(buffer []byte) ([]byte, error)
+
+// encodeGrow calls encode() into buffer, if it returns overflow grows the buffer.
+// Returns the final buffer.
+func encodeGrow(buffer []byte, encode encodeFn) ([]byte, error) {
+	if buffer == nil || len(buffer) == 0 {
+		buffer = make([]byte, minEncode)
+	}
+	var err error
+	for buffer, err = encode(buffer); err == overflow; buffer, err = encode(buffer) {
+		buffer = make([]byte, 2*len(buffer))
+	}
+	return buffer, err
+}
+
+func put(data *C.pn_data_t, v interface{}) {
+	switch v := v.(type) {
+	case nil:
+		C.pn_data_put_null(data)
+	case bool:
+		C.pn_data_put_bool(data, C.bool(v))
+	case int8:
+		C.pn_data_put_byte(data, C.int8_t(v))
+	case int16:
+		C.pn_data_put_short(data, C.int16_t(v))
+	case int32:
+		C.pn_data_put_int(data, C.int32_t(v))
+	case int64:
+		C.pn_data_put_long(data, C.int64_t(v))
+	case int:
+		if unsafe.Sizeof(0) == 8 {
+			C.pn_data_put_long(data, C.int64_t(v))
+		} else {
+			C.pn_data_put_int(data, C.int32_t(v))
+		}
+	case uint8:
+		C.pn_data_put_ubyte(data, C.uint8_t(v))
+	case uint16:
+		C.pn_data_put_ushort(data, C.uint16_t(v))
+	case uint32:
+		C.pn_data_put_uint(data, C.uint32_t(v))
+	case uint64:
+		C.pn_data_put_ulong(data, C.uint64_t(v))
+	case uint:
+		if unsafe.Sizeof(0) == 8 {
+			C.pn_data_put_ulong(data, C.uint64_t(v))
+		} else {
+			C.pn_data_put_uint(data, C.uint32_t(v))
+		}
+	case float32:
+		C.pn_data_put_float(data, C.float(v))
+	case float64:
+		C.pn_data_put_double(data, C.double(v))
+	case string:
+		C.pn_data_put_string(data, pnBytes([]byte(v)))
+	case []byte:
+		C.pn_data_put_binary(data, pnBytes(v))
+	case Binary:
+		C.pn_data_put_binary(data, pnBytes([]byte(v)))
+	case Symbol:
+		C.pn_data_put_symbol(data, pnBytes([]byte(v)))
+	case Map: // Special map type
+		C.pn_data_put_map(data)
+		C.pn_data_enter(data)
+		for key, val := range v {
+			put(data, key)
+			put(data, val)
+		}
+		C.pn_data_exit(data)
+	default:
+		switch reflect.TypeOf(v).Kind() {
+		case reflect.Map:
+			putMap(data, v)
+		case reflect.Slice:
+			putList(data, v)
+		default:
+			panic(internal.Errorf("cannot marshal %s to AMQP", reflect.TypeOf(v)))
+		}
+	}
+	err := dataError("marshal", data)
+	if err != nil {
+		panic(err)
+	}
+	return
+}
+
+func putMap(data *C.pn_data_t, v interface{}) {
+	mapValue := reflect.ValueOf(v)
+	C.pn_data_put_map(data)
+	C.pn_data_enter(data)
+	for _, key := range mapValue.MapKeys() {
+		put(data, key.Interface())
+		put(data, mapValue.MapIndex(key).Interface())
+	}
+	C.pn_data_exit(data)
+}
+
+func putList(data *C.pn_data_t, v interface{}) {
+	listValue := reflect.ValueOf(v)
+	C.pn_data_put_list(data)
+	C.pn_data_enter(data)
+	for i := 0; i < listValue.Len(); i++ {
+		put(data, listValue.Index(i).Interface())
+	}
+	C.pn_data_exit(data)
+}
+
+// Encoder encodes AMQP values to an io.Writer
+type Encoder struct {
+	writer io.Writer
+	buffer []byte
+}
+
+// New encoder returns a new encoder that writes to w.
+func NewEncoder(w io.Writer) *Encoder {
+	return &Encoder{w, make([]byte, minEncode)}
+}
+
+func (e *Encoder) Encode(v interface{}) (err error) {
+	e.buffer, err = Marshal(v, e.buffer)
+	if err == nil {
+		e.writer.Write(e.buffer)
+	}
+	return err
+}
+
+func replace(data *C.pn_data_t, v interface{}) {
+	C.pn_data_clear(data)
+	put(data, v)
+}

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/proton-c/bindings/go/amqp/message.go
----------------------------------------------------------------------
diff --git a/proton-c/bindings/go/amqp/message.go b/proton-c/bindings/go/amqp/message.go
new file mode 100644
index 0000000..87093f5
--- /dev/null
+++ b/proton-c/bindings/go/amqp/message.go
@@ -0,0 +1,342 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+*/
+
+package amqp
+
+// #include <proton/types.h>
+// #include <proton/message.h>
+// #include <proton/codec.h>
+import "C"
+
+import (
+	"qpid.apache.org/proton/go/internal"
+	"time"
+	"unsafe"
+)
+
+// FIXME aconway 2015-04-28: Do we need the interface or can we just export the struct?
+
+// Message is the interface to an AMQP message.
+// Instances of this interface contain a pointer to the underlying struct.
+type Message interface {
+	/**
+	 * Inferred indicates how the message content
+	 * is encoded into AMQP sections. If inferred is true then binary and
+	 * list values in the body of the message will be encoded as AMQP DATA
+	 * and AMQP SEQUENCE sections, respectively. If inferred is false,
+	 * then all values in the body of the message will be encoded as AMQP
+	 * VALUE sections regardless of their type.
+	 */
+	Inferred() bool
+	SetInferred(bool)
+
+	/**
+	 * Durable indicates that any parties taking responsibility
+	 * for the message must durably store the content.
+	 */
+	Durable() bool
+	SetDurable(bool)
+
+	/**
+	 * Priority impacts ordering guarantees. Within a
+	 * given ordered context, higher priority messages may jump ahead of
+	 * lower priority messages.
+	 */
+	Priority() uint8
+	SetPriority(uint8)
+
+	/**
+	 * TTL or Time To Live, a message it may be dropped after this duration
+	 */
+	TTL() time.Duration
+	SetTTL(time.Duration)
+
+	/**
+	 * FirstAcquirer indicates
+	 * that the recipient of the message is the first recipient to acquire
+	 * the message, i.e. there have been no failed delivery attempts to
+	 * other acquirers. Note that this does not mean the message has not
+	 * been delivered to, but not acquired, by other recipients.
+	 */
+	FirstAcquirer() bool
+	SetFirstAcquirer(bool)
+
+	/**
+	 * DeliveryCount tracks how many attempts have been made to
+	 * delivery a message.
+	 */
+	DeliveryCount() uint32
+	SetDeliveryCount(uint32)
+
+	/**
+	 * MessageId provides a unique identifier for a message.
+	 * it can be an a string, an unsigned long, a uuid or a
+	 * binary value.
+	 */
+	MessageId() interface{}
+	SetMessageId(interface{})
+
+	UserId() string
+	SetUserId(string)
+
+	Address() string
+	SetAddress(string)
+
+	Subject() string
+	SetSubject(string)
+
+	ReplyTo() string
+	SetReplyTo(string)
+
+	/**
+	 * CorrelationId is set on correlated request and response messages. It can be an a string, an unsigned long, a uuid or a
+	 * binary value.
+	 */
+	CorrelationId() interface{}
+	SetCorrelationId(interface{})
+
+	ContentType() string
+	SetContentType(string)
+
+	ContentEncoding() string
+	SetContentEncoding(string)
+
+	// ExpiryTime indicates an absoulte time when the message may be dropped.
+	// A Zero time (i.e. t.isZero() == true) indicates a message never expires.
+	ExpiryTime() time.Time
+	SetExpiryTime(time.Time)
+
+	CreationTime() time.Time
+	SetCreationTime(time.Time)
+
+	GroupId() string
+	SetGroupId(string)
+
+	GroupSequence() int32
+	SetGroupSequence(int32)
+
+	ReplyToGroupId() string
+	SetReplyToGroupId(string)
+
+	/**
+	 * Instructions can be used to access or modify AMQP delivery instructions.
+	 */
+	Instructions() *map[string]interface{}
+
+	/**
+	 * Annotations  can be used to access or modify AMQP annotations.
+	 */
+	Annotations() *map[string]interface{}
+
+	/**
+	 * Properties  can be used to access or modify the application properties of a message.
+	 */
+	Properties() *map[string]interface{}
+
+	/**
+	 * Body of the message can be any AMQP encodable type.
+	 */
+	Body() interface{}
+	SetBody(interface{})
+
+	// Encode encodes the message as AMQP data. If buffer is non-nil and is large enough
+	// the message is encoded into it, otherwise a new buffer is created.
+	// Returns the buffer containing the message.
+	Encode(buffer []byte) ([]byte, error)
+}
+
+// NewMessage creates a new message instance. The returned interface contains a pointer.
+func NewMessage() Message {
+	pn := C.pn_message() // Pick up default setting from C message.
+	defer C.pn_message_free(pn)
+	return goMessage(pn)
+}
+
+// Message implementation copies all message data into Go space so it can be proprely
+// memory managed.
+//
+type message struct {
+	inferred, durable, firstAcquirer      bool
+	priority                              uint8
+	ttl                                   time.Duration
+	deliveryCount                         uint32
+	messageId                             interface{}
+	userId, address, subject, replyTo     string
+	contentType, contentEncoding          string
+	groupId, replyToGroupId               string
+	creationTime, expiryTime              time.Time
+	groupSequence                         int32
+	correlationId                         interface{}
+	instructions, annotations, properties map[string]interface{}
+	body                                  interface{}
+}
+
+func (m *message) Inferred() bool                        { return m.inferred }
+func (m *message) SetInferred(b bool)                    { m.inferred = b }
+func (m *message) Durable() bool                         { return m.durable }
+func (m *message) SetDurable(b bool)                     { m.durable = b }
+func (m *message) Priority() uint8                       { return m.priority }
+func (m *message) SetPriority(b uint8)                   { m.priority = b }
+func (m *message) TTL() time.Duration                    { return m.ttl }
+func (m *message) SetTTL(d time.Duration)                { m.ttl = d }
+func (m *message) FirstAcquirer() bool                   { return m.firstAcquirer }
+func (m *message) SetFirstAcquirer(b bool)               { m.firstAcquirer = b }
+func (m *message) DeliveryCount() uint32                 { return m.deliveryCount }
+func (m *message) SetDeliveryCount(c uint32)             { m.deliveryCount = c }
+func (m *message) MessageId() interface{}                { return m.messageId }
+func (m *message) SetMessageId(id interface{})           { m.messageId = id }
+func (m *message) UserId() string                        { return m.userId }
+func (m *message) SetUserId(s string)                    { m.userId = s }
+func (m *message) Address() string                       { return m.address }
+func (m *message) SetAddress(s string)                   { m.address = s }
+func (m *message) Subject() string                       { return m.subject }
+func (m *message) SetSubject(s string)                   { m.subject = s }
+func (m *message) ReplyTo() string                       { return m.replyTo }
+func (m *message) SetReplyTo(s string)                   { m.replyTo = s }
+func (m *message) CorrelationId() interface{}            { return m.correlationId }
+func (m *message) SetCorrelationId(c interface{})        { m.correlationId = c }
+func (m *message) ContentType() string                   { return m.contentType }
+func (m *message) SetContentType(s string)               { m.contentType = s }
+func (m *message) ContentEncoding() string               { return m.contentEncoding }
+func (m *message) SetContentEncoding(s string)           { m.contentEncoding = s }
+func (m *message) ExpiryTime() time.Time                 { return m.expiryTime }
+func (m *message) SetExpiryTime(t time.Time)             { m.expiryTime = t }
+func (m *message) CreationTime() time.Time               { return m.creationTime }
+func (m *message) SetCreationTime(t time.Time)           { m.creationTime = t }
+func (m *message) GroupId() string                       { return m.groupId }
+func (m *message) SetGroupId(s string)                   { m.groupId = s }
+func (m *message) GroupSequence() int32                  { return m.groupSequence }
+func (m *message) SetGroupSequence(s int32)              { m.groupSequence = s }
+func (m *message) ReplyToGroupId() string                { return m.replyToGroupId }
+func (m *message) SetReplyToGroupId(s string)            { m.replyToGroupId = s }
+func (m *message) Instructions() *map[string]interface{} { return &m.instructions }
+func (m *message) Annotations() *map[string]interface{}  { return &m.annotations }
+func (m *message) Properties() *map[string]interface{}   { return &m.properties }
+func (m *message) Body() interface{}                     { return m.body }
+func (m *message) SetBody(b interface{})                 { m.body = b }
+
+// rewindGet rewinds and then gets the value from a data object.
+func rewindGet(data *C.pn_data_t, v interface{}) {
+	if data != nil && C.pn_data_size(data) > 0 {
+		C.pn_data_rewind(data)
+		C.pn_data_next(data)
+		get(data, v)
+	}
+}
+
+// goMessage populates a Go message from a pn_message_t
+func goMessage(pn *C.pn_message_t) *message {
+	m := &message{
+		inferred:        bool(C.pn_message_is_inferred(pn)),
+		durable:         bool(C.pn_message_is_durable(pn)),
+		priority:        uint8(C.pn_message_get_priority(pn)),
+		ttl:             time.Duration(C.pn_message_get_ttl(pn)) * time.Millisecond,
+		firstAcquirer:   bool(C.pn_message_is_first_acquirer(pn)),
+		deliveryCount:   uint32(C.pn_message_get_delivery_count(pn)),
+		userId:          goString(C.pn_message_get_user_id(pn)),
+		address:         C.GoString(C.pn_message_get_address(pn)),
+		subject:         C.GoString(C.pn_message_get_subject(pn)),
+		replyTo:         C.GoString(C.pn_message_get_reply_to(pn)),
+		contentType:     C.GoString(C.pn_message_get_content_type(pn)),
+		contentEncoding: C.GoString(C.pn_message_get_content_encoding(pn)),
+		expiryTime:      time.Unix(0, int64(time.Millisecond*time.Duration(C.pn_message_get_expiry_time(pn)))),
+		creationTime:    time.Unix(0, int64(time.Millisecond)*int64(C.pn_message_get_creation_time(pn))),
+		groupId:         C.GoString(C.pn_message_get_group_id(pn)),
+		groupSequence:   int32(C.pn_message_get_group_sequence(pn)),
+		replyToGroupId:  C.GoString(C.pn_message_get_reply_to_group_id(pn)),
+		messageId:       nil,
+		correlationId:   nil,
+		instructions:    make(map[string]interface{}),
+		annotations:     make(map[string]interface{}),
+		properties:      make(map[string]interface{}),
+	}
+	rewindGet(C.pn_message_id(pn), &m.messageId)
+	rewindGet(C.pn_message_correlation_id(pn), &m.correlationId)
+	rewindGet(C.pn_message_instructions(pn), &m.instructions)
+	rewindGet(C.pn_message_annotations(pn), &m.annotations)
+	rewindGet(C.pn_message_properties(pn), &m.properties)
+	rewindGet(C.pn_message_body(pn), &m.body)
+	return m
+}
+
+// pnMessage populates a pn_message_t from a Go message.
+func (m *message) pnMessage() *C.pn_message_t {
+	pn := C.pn_message()
+	C.pn_message_set_inferred(pn, C.bool(m.Inferred()))
+	C.pn_message_set_durable(pn, C.bool(m.Durable()))
+	C.pn_message_set_priority(pn, C.uint8_t(m.priority))
+	C.pn_message_set_ttl(pn, C.pn_millis_t(m.TTL()/time.Millisecond))
+	C.pn_message_set_first_acquirer(pn, C.bool(m.FirstAcquirer()))
+	C.pn_message_set_delivery_count(pn, C.uint32_t(m.deliveryCount))
+	replace(C.pn_message_id(pn), m.MessageId())
+	C.pn_message_set_user_id(pn, pnBytes([]byte(m.UserId())))
+	C.pn_message_set_address(pn, C.CString(m.Address()))
+	C.pn_message_set_subject(pn, C.CString(m.Subject()))
+	C.pn_message_set_reply_to(pn, C.CString(m.ReplyTo()))
+	replace(C.pn_message_correlation_id(pn), m.CorrelationId())
+	C.pn_message_set_content_type(pn, C.CString(m.ContentType()))
+	C.pn_message_set_content_encoding(pn, C.CString(m.ContentEncoding()))
+	C.pn_message_set_expiry_time(pn, pnTime(m.ExpiryTime()))
+	C.pn_message_set_creation_time(pn, pnTime(m.CreationTime()))
+	C.pn_message_set_group_id(pn, C.CString(m.GroupId()))
+	C.pn_message_set_group_sequence(pn, C.pn_sequence_t(m.GroupSequence()))
+	C.pn_message_set_reply_to_group_id(pn, C.CString(m.ReplyToGroupId()))
+	replace(C.pn_message_instructions(pn), *m.Instructions())
+	replace(C.pn_message_annotations(pn), *m.Annotations())
+	replace(C.pn_message_properties(pn), *m.Properties())
+	replace(C.pn_message_body(pn), m.Body())
+	return pn
+}
+
+// FIXME aconway 2015-04-08: Move message encode/decode under Marshal/Unmarshal interfaces.
+
+// DecodeMessage decodes bytes as a message
+func DecodeMessage(data []byte) (Message, error) {
+	pnMsg := C.pn_message()
+	defer C.pn_message_free(pnMsg)
+	if len(data) == 0 {
+		return nil, internal.Errorf("empty buffer for decode")
+	}
+	if C.pn_message_decode(pnMsg, cPtr(data), cLen(data)) < 0 {
+		return nil, internal.Errorf("decoding message: %s",
+			internal.PnError(unsafe.Pointer(C.pn_message_error(pnMsg))))
+	}
+	return goMessage(pnMsg), nil
+}
+
+// Encode the message into bufffer.
+// If buffer is nil or len(buffer) is not sufficient to encode the message a larger
+// buffer will be returned.
+func (m *message) Encode(buffer []byte) ([]byte, error) {
+	pn := m.pnMessage()
+	defer C.pn_message_free(pn)
+	encode := func(buf []byte) ([]byte, error) {
+		len := cLen(buf)
+		result := C.pn_message_encode(pn, cPtr(buf), &len)
+		switch {
+		case result == C.PN_OVERFLOW:
+			return buf, overflow
+		case result < 0:
+			return buf, internal.Errorf("cannot encode message: %s", internal.PnErrorCode(result))
+		default:
+			return buf[:len], nil
+		}
+	}
+	return encodeGrow(buffer, encode)
+}

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/proton-c/bindings/go/amqp/message_test.go
----------------------------------------------------------------------
diff --git a/proton-c/bindings/go/amqp/message_test.go b/proton-c/bindings/go/amqp/message_test.go
new file mode 100644
index 0000000..46e26de
--- /dev/null
+++ b/proton-c/bindings/go/amqp/message_test.go
@@ -0,0 +1,90 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+*/
+
+package amqp
+
+import (
+	"reflect"
+	"testing"
+	"time"
+)
+
+func roundTrip(t *testing.T, m Message) {
+	buffer, err := m.Encode(nil)
+	if err != nil {
+		t.Fatalf("Encode failed: %v", err)
+	}
+	m2, err := DecodeMessage(buffer)
+	if err != nil {
+		t.Fatalf("Decode failed: %v", err)
+	}
+	if !reflect.DeepEqual(m, m2) {
+		t.Errorf("Message mismatch got\n%#v\nwant\n%#v", m, m2)
+	}
+}
+
+func TestDefaultMessageRoundTrip(t *testing.T) {
+	m := NewMessage()
+	// Check defaults
+	assertEqual(m.Inferred(), false)
+	assertEqual(m.Durable(), false)
+	assertEqual(m.Priority(), uint8(4))
+	assertEqual(m.TTL(), time.Duration(0))
+	assertEqual(m.UserId(), "")
+	assertEqual(m.Address(), "")
+	assertEqual(m.Subject(), "")
+	assertEqual(m.ReplyTo(), "")
+	assertEqual(m.ContentType(), "")
+	assertEqual(m.ContentEncoding(), "")
+	assertEqual(m.GroupId(), "")
+	assertEqual(m.GroupSequence(), int32(0))
+	assertEqual(m.ReplyToGroupId(), "")
+	assertEqual(m.MessageId(), nil)
+	assertEqual(m.CorrelationId(), nil)
+	assertEqual(*m.Instructions(), map[string]interface{}{})
+	assertEqual(*m.Annotations(), map[string]interface{}{})
+	assertEqual(*m.Properties(), map[string]interface{}{})
+	assertEqual(m.Body(), nil)
+
+	roundTrip(t, m)
+}
+
+func TestMessageRoundTrip(t *testing.T) {
+	m := NewMessage()
+	m.SetInferred(false)
+	m.SetDurable(true)
+	m.SetPriority(42)
+	m.SetTTL(0)
+	m.SetUserId("user")
+	m.SetAddress("address")
+	m.SetSubject("subject")
+	m.SetReplyTo("replyto")
+	m.SetContentType("content")
+	m.SetContentEncoding("encoding")
+	m.SetGroupId("group")
+	m.SetGroupSequence(42)
+	m.SetReplyToGroupId("replytogroup")
+	m.SetMessageId("id")
+	m.SetCorrelationId("correlation")
+	*m.Instructions() = map[string]interface{}{"instructions": "foo"}
+	*m.Annotations() = map[string]interface{}{"annotations": "foo"}
+	*m.Properties() = map[string]interface{}{"int": int32(32), "bool": true, "string": "foo"}
+	m.SetBody("hello")
+	roundTrip(t, m)
+}

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/proton-c/bindings/go/amqp/types.go
----------------------------------------------------------------------
diff --git a/proton-c/bindings/go/amqp/types.go b/proton-c/bindings/go/amqp/types.go
new file mode 100644
index 0000000..8713520
--- /dev/null
+++ b/proton-c/bindings/go/amqp/types.go
@@ -0,0 +1,193 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+*/
+
+package amqp
+
+// #include <proton/codec.h>
+// const pn_type_t PN_DATA_TYPE_ERROR = (pn_type_t) -1;
+import "C"
+
+import (
+	"bytes"
+	"fmt"
+	"reflect"
+	"time"
+	"unsafe"
+)
+
+func pnTypeString(pt C.pn_type_t) string {
+	switch pt {
+	case C.PN_NULL:
+		return "null"
+	case C.PN_BOOL:
+		return "bool"
+	case C.PN_UBYTE:
+		return "ubyte"
+	case C.PN_BYTE:
+		return "byte"
+	case C.PN_USHORT:
+		return "ushort"
+	case C.PN_SHORT:
+		return "short"
+	case C.PN_CHAR:
+		return "char"
+	case C.PN_UINT:
+		return "uint"
+	case C.PN_INT:
+		return "int"
+	case C.PN_ULONG:
+		return "ulong"
+	case C.PN_LONG:
+		return "long"
+	case C.PN_TIMESTAMP:
+		return "timestamp"
+	case C.PN_FLOAT:
+		return "float"
+	case C.PN_DOUBLE:
+		return "double"
+	case C.PN_DECIMAL32:
+		return "decimal32"
+	case C.PN_DECIMAL64:
+		return "decimal64"
+	case C.PN_DECIMAL128:
+		return "decimal128"
+	case C.PN_UUID:
+		return "uuid"
+	case C.PN_BINARY:
+		return "binary"
+	case C.PN_STRING:
+		return "string"
+	case C.PN_SYMBOL:
+		return "symbol"
+	case C.PN_DESCRIBED:
+		return "described"
+	case C.PN_ARRAY:
+		return "array"
+	case C.PN_LIST:
+		return "list"
+	case C.PN_MAP:
+		return "map"
+	case C.PN_DATA_TYPE_ERROR:
+		return "no-data"
+	default:
+		return fmt.Sprintf("unknown-type(%d)", pt)
+	}
+}
+
+// Go types
+var (
+	bytesType = reflect.TypeOf([]byte{})
+	valueType = reflect.TypeOf(reflect.Value{})
+)
+
+// FIXME aconway 2015-04-08: can't handle AMQP maps with key types that are not valid Go map keys.
+
+// Map is a generic map that can have mixed key and value types and so can represent any AMQP map
+type Map map[interface{}]interface{}
+
+// List is a generic list that can hold mixed values and can represent any AMQP list.
+//
+type List []interface{}
+
+// Symbol is a string that is encoded as an AMQP symbol
+type Symbol string
+
+// Binary is a string that is encoded as an AMQP binary.
+// It is a string rather than a byte[] because byte[] is not hashable and can't be used as
+// a map key, AMQP frequently uses binary types as map keys. It can convert to and from []byte
+type Binary string
+
+// GoString for Map prints values with their types, useful for debugging.
+func (m Map) GoString() string {
+	out := &bytes.Buffer{}
+	fmt.Fprintf(out, "%T{", m)
+	i := len(m)
+	for k, v := range m {
+		fmt.Fprintf(out, "%T(%#v): %T(%#v)", k, k, v, v)
+		i--
+		if i > 0 {
+			fmt.Fprint(out, ", ")
+		}
+	}
+	fmt.Fprint(out, "}")
+	return out.String()
+}
+
+// GoString for List prints values with their types, useful for debugging.
+func (l List) GoString() string {
+	out := &bytes.Buffer{}
+	fmt.Fprintf(out, "%T{", l)
+	for i := 0; i < len(l); i++ {
+		fmt.Fprintf(out, "%T(%#v)", l[i], l[i])
+		if i == len(l)-1 {
+			fmt.Fprint(out, ", ")
+		}
+	}
+	fmt.Fprint(out, "}")
+	return out.String()
+}
+
+// pnTime converts Go time.Time to Proton millisecond Unix time.
+func pnTime(t time.Time) C.pn_timestamp_t {
+	secs := t.Unix()
+	// Note: sub-second accuracy is not guaraunteed if the Unix time in
+	// nanoseconds cannot be represented by an int64 (sometime around year 2260)
+	msecs := (t.UnixNano() % int64(time.Second)) / int64(time.Millisecond)
+	return C.pn_timestamp_t(secs*1000 + msecs)
+}
+
+// goTime converts a pn_timestamp_t to a Go time.Time.
+func goTime(t C.pn_timestamp_t) time.Time {
+	secs := int64(t) / 1000
+	nsecs := (int64(t) % 1000) * int64(time.Millisecond)
+	return time.Unix(secs, nsecs)
+}
+
+func goBytes(cBytes C.pn_bytes_t) (bytes []byte) {
+	if cBytes.start != nil {
+		bytes = C.GoBytes(unsafe.Pointer(cBytes.start), C.int(cBytes.size))
+	}
+	return
+}
+
+func goString(cBytes C.pn_bytes_t) (str string) {
+	if cBytes.start != nil {
+		str = C.GoStringN(cBytes.start, C.int(cBytes.size))
+	}
+	return
+}
+
+func pnBytes(b []byte) C.pn_bytes_t {
+	if len(b) == 0 {
+		return C.pn_bytes_t{0, nil}
+	} else {
+		return C.pn_bytes_t{C.size_t(len(b)), (*C.char)(unsafe.Pointer(&b[0]))}
+	}
+}
+
+func cPtr(b []byte) *C.char {
+	if len(b) == 0 {
+		return nil
+	}
+	return (*C.char)(unsafe.Pointer(&b[0]))
+}
+
+func cLen(b []byte) C.size_t {
+	return C.size_t(len(b))
+}

http://git-wip-us.apache.org/repos/asf/qpid-proton/blob/6ea3649d/proton-c/bindings/go/amqp/uid.go
----------------------------------------------------------------------
diff --git a/proton-c/bindings/go/amqp/uid.go b/proton-c/bindings/go/amqp/uid.go
new file mode 100644
index 0000000..944bf6f
--- /dev/null
+++ b/proton-c/bindings/go/amqp/uid.go
@@ -0,0 +1,40 @@
+/*
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+*/
+
+// Generating unique IDs for various things.
+
+package amqp
+
+import (
+	"strconv"
+	"sync/atomic"
+)
+
+// A simple atomic counter to generate unique 64 bit IDs.
+type UidCounter struct{ count uint64 }
+
+// NextInt gets the next uint64 value from the atomic counter.
+func (uc *UidCounter) NextInt() uint64 {
+	return atomic.AddUint64(&uc.count, 1)
+}
+
+// Next gets the next integer value encoded as a base32 string, safe for NUL terminated C strings.
+func (uc *UidCounter) Next() string {
+	return strconv.FormatUint(uc.NextInt(), 32)
+}


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