// startReceiver creates a receiver and a goroutine for its run() method.
func (h *handler) startReceiver(e proton.Event) {
q := h.queues.Get(e.Link().RemoteTarget().Address())
r := &receiver{
link: makeLink(e.Link(), q, h),
buffer: make(chan receivedMessage, *credit),
}
h.receivers[r.l] = r
r.l.Flow(cap(r.buffer)) // Give credit to fill the buffer to capacity.
go r.run()
}
// startSender creates a sender and starts a goroutine for sender.run()
func (h *handler) startSender(e proton.Event) {
q := h.queues.Get(e.Link().RemoteSource().Address())
s := &sender{
link: makeLink(e.Link(), q, h),
credit: make(chan struct{}, 1), // Capacity of 1 for signalling.
}
h.senders[e.Link()] = s
go s.run()
}
func (h *handler) HandleMessagingEvent(t proton.MessagingEvent, e proton.Event) {
switch t {
case proton.MMessage:
if r, ok := h.links[e.Link()].(*receiver); ok {
r.message(e.Delivery())
} else {
h.linkError(e.Link(), "no receiver")
}
case proton.MSettled:
if sm, ok := h.sentMessages[e.Delivery()]; ok {
d := e.Delivery().Remote()
sm.ack <- Outcome{sentStatus(d.Type()), d.Condition().Error(), sm.value}
delete(h.sentMessages, e.Delivery())
}
case proton.MSendable:
if s, ok := h.links[e.Link()].(*sender); ok {
s.sendable()
} else {
h.linkError(e.Link(), "no sender")
}
case proton.MConnectionOpening:
h.connection.heartbeat = e.Transport().RemoteIdleTimeout()
if e.Connection().State().LocalUninit() { // Remotely opened
h.incoming(newIncomingConnection(h.connection))
}
h.connection.wakeSync()
case proton.MSessionOpening:
if e.Session().State().LocalUninit() { // Remotely opened
h.incoming(newIncomingSession(h, e.Session()))
}
h.sessions[e.Session()].wakeSync()
case proton.MSessionClosed:
h.sessionClosed(e.Session(), proton.EndpointError(e.Session()))
case proton.MLinkOpening:
l := e.Link()
if ss := h.sessions[l.Session()]; ss != nil {
if l.State().LocalUninit() { // Remotely opened.
if l.IsReceiver() {
h.incoming(newIncomingReceiver(ss, l))
} else {
h.incoming(newIncomingSender(ss, l))
}
}
if ep, ok := h.links[l]; ok {
ep.wakeSync()
} else {
h.linkError(l, "no link")
}
} else {
h.linkError(l, "no session")
}
case proton.MLinkClosing:
e.Link().Close()
case proton.MLinkClosed:
h.linkClosed(e.Link(), proton.EndpointError(e.Link()))
case proton.MConnectionClosing:
h.connection.err.Set(e.Connection().RemoteCondition().Error())
case proton.MConnectionClosed:
h.shutdown(proton.EndpointError(e.Connection()))
case proton.MDisconnected:
err := e.Transport().Condition().Error()
if err == nil {
err = amqp.Errorf(amqp.IllegalState, "unexpected disconnect on %s", h.connection)
}
h.shutdown(err)
}
}
func (h *handler) HandleMessagingEvent(t proton.MessagingEvent, e proton.Event) {
switch t {
case proton.MMessage:
if r, ok := h.links[e.Link()].(*receiver); ok {
r.message(e.Delivery())
} else {
h.internalError(e.Link(), "no receiver for link")
}
case proton.MSettled:
if sm := h.sentMessages[e.Delivery()]; sm != nil {
sm.settled(nil)
}
case proton.MSendable:
if s, ok := h.links[e.Link()].(*sender); ok {
s.sendable()
} else {
h.internalError(e.Link(), "no sender for link")
}
case proton.MSessionOpening:
if e.Session().State().LocalUninit() { // Remotely opened
incoming := &IncomingSession{h: h, pSession: e.Session()}
h.connection.accept(incoming)
if err := incoming.error("rejected session %s", e.Session()); err != nil {
proton.CloseError(e.Session(), err)
}
}
case proton.MSessionClosed:
err := proton.EndpointError(e.Session())
for l, _ := range h.links {
if l.Session() == e.Session() {
h.linkClosed(l, err)
}
}
delete(h.sessions, e.Session())
case proton.MLinkOpening:
l := e.Link()
if l.State().LocalActive() { // Already opened locally.
break
}
ss := h.sessions[l.Session()]
if ss == nil {
h.internalError(e.Link(), "no session for link")
break
}
var incoming Incoming
if l.IsReceiver() {
incoming = &IncomingReceiver{makeIncomingLink(ss, l)}
} else {
incoming = &IncomingSender{makeIncomingLink(ss, l)}
}
h.connection.accept(incoming)
if err := incoming.error("rejected link %s", e.Link()); err != nil {
proton.CloseError(l, err)
break
}
case proton.MLinkClosing:
e.Link().Close()
case proton.MLinkClosed:
h.linkClosed(e.Link(), proton.EndpointError(e.Link()))
case proton.MConnectionClosing:
h.connection.err.Set(e.Connection().RemoteCondition().Error())
case proton.MConnectionClosed:
h.connection.err.Set(Closed) // If no error already set, this is an orderly close.
case proton.MDisconnected:
h.connection.err.Set(e.Transport().Condition().Error())
// If err not set at this point (e.g. to Closed) then this is unexpected.
h.connection.err.Set(amqp.Errorf(amqp.IllegalState, "unexpected disconnect on %s", h.connection))
err := h.connection.Error()
for l, _ := range h.links {
h.linkClosed(l, err)
}
for _, s := range h.sessions {
s.closed(err)
}
for _, sm := range h.sentMessages {
sm.settled(err)
}
}
}
// HandleMessagingEvent handles an event, called in the handler goroutine.
func (h *handler) HandleMessagingEvent(t proton.MessagingEvent, e proton.Event) {
switch t {
case proton.MStart:
h.injecter = e.Injecter()
case proton.MLinkOpening:
if e.Link().IsReceiver() {
h.startReceiver(e)
} else {
h.startSender(e)
}
case proton.MLinkClosed:
h.linkClosed(e.Link(), e.Link().RemoteCondition().Error())
case proton.MSendable:
if s, ok := h.senders[e.Link()]; ok {
s.sendable() // Signal the send goroutine that we have credit.
} else {
proton.CloseError(e.Link(), amqp.Errorf(amqp.NotFound, "link %s sender not found", e.Link()))
}
case proton.MMessage:
m, err := e.Delivery().Message() // Message() must be called while handling the MMessage event.
if err != nil {
proton.CloseError(e.Link(), err)
break
}
r, ok := h.receivers[e.Link()]
if !ok {
proton.CloseError(e.Link(), amqp.Errorf(amqp.NotFound, "link %s receiver not found", e.Link()))
break
}
// This will not block as AMQP credit is set to the buffer capacity.
r.buffer <- receivedMessage{e.Delivery(), m}
util.Debugf("link %s received %s", e.Link(), util.FormatMessage(m))
case proton.MConnectionClosed, proton.MDisconnected:
for l, _ := range h.receivers {
h.linkClosed(l, nil)
}
for l, _ := range h.senders {
h.linkClosed(l, nil)
}
}
}
func (h *handler) HandleMessagingEvent(t proton.MessagingEvent, e proton.Event) {
switch t {
case proton.MMessage:
if r, ok := h.links[e.Link()].(*receiver); ok {
r.message(e.Delivery())
} else {
h.linkError(e.Link(), "no receiver")
}
case proton.MSettled:
if sm, ok := h.sentMessages[e.Delivery()]; ok {
d := e.Delivery().Remote()
sm.ack <- Outcome{sentStatus(d.Type()), d.Condition().Error(), sm.value}
delete(h.sentMessages, e.Delivery())
}
case proton.MSendable:
if s, ok := h.links[e.Link()].(*sender); ok {
s.sendable()
} else {
h.linkError(e.Link(), "no sender")
}
case proton.MSessionOpening:
if e.Session().State().LocalUninit() { // Remotely opened
h.incoming(newIncomingSession(h, e.Session()))
}
case proton.MSessionClosed:
h.sessionClosed(e.Session(), proton.EndpointError(e.Session()))
case proton.MLinkOpening:
l := e.Link()
if l.State().LocalActive() { // Already opened locally.
break
}
ss := h.sessions[l.Session()]
if ss == nil {
h.linkError(e.Link(), "no session")
break
}
if l.IsReceiver() {
h.incoming(&IncomingReceiver{makeIncomingLink(ss, l)})
} else {
h.incoming(&IncomingSender{makeIncomingLink(ss, l)})
}
case proton.MLinkClosing:
e.Link().Close()
case proton.MLinkClosed:
h.linkClosed(e.Link(), proton.EndpointError(e.Link()))
case proton.MConnectionClosing:
h.connection.err.Set(e.Connection().RemoteCondition().Error())
case proton.MConnectionClosed:
h.connectionClosed(proton.EndpointError(e.Connection()))
case proton.MDisconnected:
h.connection.err.Set(e.Transport().Condition().Error())
// If err not set at this point (e.g. to Closed) then this is unexpected.
h.connection.err.Set(amqp.Errorf(amqp.IllegalState, "unexpected disconnect on %s", h.connection))
err := h.connection.Error()
for l, _ := range h.links {
h.linkClosed(l, err)
}
h.links = nil
for _, s := range h.sessions {
s.closed(err)
}
h.sessions = nil
for _, sm := range h.sentMessages {
sm.ack <- Outcome{Unacknowledged, err, sm.value}
}
h.sentMessages = nil
}
}
func (h *handler) HandleMessagingEvent(t proton.MessagingEvent, e proton.Event) {
switch t {
case proton.MMessage:
if r, ok := h.links[e.Link()].(*receiver); ok {
r.handleDelivery(e.Delivery())
} else {
h.connection.closed(
amqp.Errorf(amqp.InternalError, "cannot find receiver for link %s", e.Link()))
}
case proton.MSettled:
if sm := h.sentMessages[e.Delivery()]; sm != nil {
sm.settled(nil)
}
case proton.MSessionOpening:
if e.Session().State().LocalUninit() { // Remotely opened
s := newSession(h.connection, e.Session())
h.sessions[e.Session()] = s
if h.connection.incoming != nil {
h.connection.incoming.In <- s
} else {
proton.CloseError(e.Session(), amqp.Errorf(amqp.NotAllowed, "remote sessions not allowed"))
}
}
case proton.MSessionClosing:
e.Session().Close()
case proton.MSessionClosed:
err := e.Session().RemoteCondition().Error()
for l, _ := range h.links {
if l.Session() == e.Session() {
h.linkClosed(l, err)
}
}
delete(h.sessions, e.Session())
case proton.MLinkOpening:
l := e.Link()
if l.State().LocalUninit() { // Remotely opened
if h.connection.incoming == nil {
proton.CloseError(l, amqp.Errorf(amqp.NotAllowed, ("no remote links")))
break
}
s := h.sessions[l.Session()]
if s == nil {
proton.CloseError(
l, amqp.Errorf(amqp.InternalError, ("cannot find session for link")))
break
}
h.connection.handleIncoming(s, l)
}
case proton.MLinkClosing:
e.Link().Close()
case proton.MLinkClosed:
h.linkClosed(e.Link(), e.Link().RemoteCondition().Error())
case proton.MDisconnected:
err := h.connection.Error()
for l, _ := range h.links {
h.linkClosed(l, err)
}
for _, s := range h.sessions {
s.closed(err)
}
for _, sm := range h.sentMessages {
sm.settled(err)
}
}
}