func (channel *Channel) basicRoute(methodFrame amqp.MethodFrame) *amqp.AMQPError {
switch method := methodFrame.(type) {
case *amqp.BasicQos:
return channel.basicQos(method)
case *amqp.BasicRecover:
return channel.basicRecover(method)
case *amqp.BasicNack:
return channel.basicNack(method)
case *amqp.BasicConsume:
return channel.basicConsume(method)
case *amqp.BasicCancel:
return channel.basicCancel(method)
case *amqp.BasicCancelOk:
return channel.basicCancelOk(method)
case *amqp.BasicPublish:
return channel.basicPublish(method)
case *amqp.BasicGet:
return channel.basicGet(method)
case *amqp.BasicAck:
return channel.basicAck(method)
case *amqp.BasicReject:
return channel.basicReject(method)
}
var classId, methodId = methodFrame.MethodIdentifier()
return amqp.NewHardError(540, "Unable to route method frame", classId, methodId)
}
func (channel *Channel) exchangeUnbind(method *amqp.ExchangeUnbind) *amqp.AMQPError {
var classId, methodId = method.MethodIdentifier()
return amqp.NewHardError(540, "Not implemented", classId, methodId)
// if !method.NoWait {
// channel.SendMethod(&amqp.ExchangeUnbindOk{})
// }
}
func (channel *Channel) routeMethod(frame *amqp.WireFrame) *amqp.AMQPError {
var methodReader = bytes.NewReader(frame.Payload)
var methodFrame, err = amqp.ReadMethod(methodReader, channel.server.strictMode)
if err != nil {
return amqp.NewHardError(500, err.Error(), 0, 0)
}
var classId, methodId = methodFrame.MethodIdentifier()
// If the method isn't closing related and we're closing, ignore the frames
var closeChannel = classId == amqp.ClassIdChannel && (methodId == amqp.MethodIdChannelClose || methodId == amqp.MethodIdChannelCloseOk)
var closeConnection = classId == amqp.ClassIdConnection && (methodId == amqp.MethodIdConnectionClose || methodId == amqp.MethodIdConnectionCloseOk)
if channel.state == CH_STATE_CLOSING && !(closeChannel || closeConnection) {
return nil
}
// Non-open method on an INIT-state channel is an error
if channel.state == CH_STATE_INIT && (classId != 20 || methodId != 10) {
return amqp.NewHardError(
503,
"Non-Channel.Open method called on unopened channel",
classId,
methodId,
)
}
// Route
// fmt.Println("Routing method: " + methodFrame.MethodName())
switch {
case classId == 10:
return channel.connectionRoute(channel.conn, methodFrame)
case classId == 20:
return channel.channelRoute(methodFrame)
case classId == 40:
return channel.exchangeRoute(methodFrame)
case classId == 50:
return channel.queueRoute(methodFrame)
case classId == 60:
return channel.basicRoute(methodFrame)
case classId == 90:
return channel.txRoute(methodFrame)
default:
return amqp.NewHardError(540, "Not implemented", classId, methodId)
}
return nil
}
func (channel *Channel) txRoute(methodFrame amqp.MethodFrame) *amqp.AMQPError {
switch method := methodFrame.(type) {
case *amqp.TxSelect:
return channel.txSelect(method)
case *amqp.TxCommit:
return channel.txCommit(method)
case *amqp.TxRollback:
return channel.txRollback(method)
}
var classId, methodId = methodFrame.MethodIdentifier()
return amqp.NewHardError(540, "Unable to route method frame", classId, methodId)
}
func (channel *Channel) exchangeRoute(methodFrame amqp.MethodFrame) *amqp.AMQPError {
switch method := methodFrame.(type) {
case *amqp.ExchangeDeclare:
return channel.exchangeDeclare(method)
case *amqp.ExchangeBind:
return channel.exchangeBind(method)
case *amqp.ExchangeUnbind:
return channel.exchangeUnbind(method)
case *amqp.ExchangeDelete:
return channel.exchangeDelete(method)
}
var classId, methodId = methodFrame.MethodIdentifier()
return amqp.NewHardError(540, "Not implemented", classId, methodId)
}
func (channel *Channel) handleContentHeader(frame *amqp.WireFrame) *amqp.AMQPError {
if channel.currentMessage == nil {
return amqp.NewSoftError(500, "Unexpected content header frame!", 0, 0)
}
if channel.currentMessage.Header != nil {
return amqp.NewSoftError(500, "Unexpected content header frame! Already saw header", 0, 0)
}
var headerFrame = &amqp.ContentHeaderFrame{}
var err = headerFrame.Read(bytes.NewReader(frame.Payload), channel.server.strictMode)
if err != nil {
return amqp.NewHardError(500, "Error parsing header frame: "+err.Error(), 0, 0)
}
channel.currentMessage.Header = headerFrame
return nil
}
func NewFromMethod(method *amqp.ExchangeDeclare, system bool, exchangeDeleter chan *Exchange) (*Exchange, *amqp.AMQPError) {
var classId, methodId = method.MethodIdentifier()
var tp, err = ExchangeNameToType(method.Type)
if err != nil || tp == EX_TYPE_HEADERS {
return nil, amqp.NewHardError(503, "Bad exchange type", classId, methodId)
}
var ex = NewExchange(
method.Exchange,
tp,
method.Durable,
method.AutoDelete,
method.Internal,
method.Arguments,
system,
exchangeDeleter,
)
return ex, nil
}
func (channel *Channel) addConsumer(q *queue.Queue, method *amqp.BasicConsume) *amqp.AMQPError {
var classId, methodId = method.MethodIdentifier()
// Create consumer
var consumer = consumer.NewConsumer(
channel.server.msgStore,
method.Arguments,
channel,
method.ConsumerTag,
method.Exclusive,
method.NoAck,
method.NoLocal,
q,
q.Name,
channel.defaultPrefetchSize,
channel.defaultPrefetchCount,
channel.conn.id,
)
channel.consumerLock.Lock()
defer channel.consumerLock.Unlock()
// Make sure the doesn't exist on this channel
_, found := channel.consumers[consumer.ConsumerTag]
if found {
return amqp.NewHardError(
530,
fmt.Sprintf("Consumer tag already exists: %s", consumer.ConsumerTag),
classId,
methodId,
)
}
// Add the consumer to the queue, then channel
code, err := q.AddConsumer(consumer, method.Exclusive)
if err != nil {
return amqp.NewSoftError(code, err.Error(), classId, methodId)
}
channel.consumers[consumer.ConsumerTag] = consumer
consumer.Start()
return nil
}
func (channel *Channel) connectionRoute(conn *AMQPConnection, methodFrame amqp.MethodFrame) *amqp.AMQPError {
switch method := methodFrame.(type) {
case *amqp.ConnectionStartOk:
return channel.connectionStartOk(conn, method)
case *amqp.ConnectionTuneOk:
return channel.connectionTuneOk(conn, method)
case *amqp.ConnectionOpen:
return channel.connectionOpen(conn, method)
case *amqp.ConnectionClose:
return channel.connectionClose(conn, method)
case *amqp.ConnectionSecureOk:
return channel.connectionSecureOk(conn, method)
case *amqp.ConnectionCloseOk:
return channel.connectionCloseOk(conn, method)
case *amqp.ConnectionBlocked:
return channel.connectionBlocked(conn, method)
case *amqp.ConnectionUnblocked:
return channel.connectionUnblocked(conn, method)
}
var classId, methodId = methodFrame.MethodIdentifier()
return amqp.NewHardError(540, "Unable to route method frame", classId, methodId)
}
func (channel *Channel) start() {
if channel.id == 0 {
channel.state = CH_STATE_OPEN
go channel.startConnection()
} else {
go channel.startChannel()
}
// Receive method frames from the client and route them
go func() {
for {
if channel.state == CH_STATE_CLOSED {
break
}
var frame = <-channel.incoming
var amqpErr *amqp.AMQPError = nil
switch {
case frame.FrameType == uint8(amqp.FrameMethod):
amqpErr = channel.routeMethod(frame)
case frame.FrameType == uint8(amqp.FrameHeader):
if channel.state != CH_STATE_CLOSING {
amqpErr = channel.handleContentHeader(frame)
}
case frame.FrameType == uint8(amqp.FrameBody):
if channel.state != CH_STATE_CLOSING {
amqpErr = channel.handleContentBody(frame)
}
default:
amqpErr = amqp.NewHardError(500, "Unknown frame type", 0, 0)
}
if amqpErr != nil {
channel.sendError(amqpErr)
}
}
}()
}
func (channel *Channel) connectionUnblocked(conn *AMQPConnection, method *amqp.ConnectionUnblocked) *amqp.AMQPError {
return amqp.NewHardError(540, "Not implemented", 10, 61)
}
func (channel *Channel) basicCancelOk(method *amqp.BasicCancelOk) *amqp.AMQPError {
// TODO(MAY)
var classId, methodId = method.MethodIdentifier()
return amqp.NewHardError(540, "Not implemented", classId, methodId)
}
func (channel *Channel) exchangeDeclare(method *amqp.ExchangeDeclare) *amqp.AMQPError {
var classId, methodId = method.MethodIdentifier()
// The client I'm using for testing thought declaring the empty exchange
// was OK. Check later
// if len(method.Exchange) > 0 && !method.Passive {
// var msg = "The empty exchange name is reserved"
// channel.channelErrorWithMethod(406, msg, classId, methodId)
// return nil
// }
// Check the name format
var err = amqp.CheckExchangeOrQueueName(method.Exchange)
if err != nil {
return amqp.NewSoftError(406, err.Error(), classId, methodId)
}
// Declare!
var ex, amqpErr = exchange.NewFromMethod(method, false, channel.server.exchangeDeleter)
if amqpErr != nil {
return amqpErr
}
tp, err := exchange.ExchangeNameToType(method.Type)
if err != nil || tp == exchange.EX_TYPE_HEADERS {
return amqp.NewHardError(503, err.Error(), classId, methodId)
}
existing, hasKey := channel.server.exchanges[ex.Name]
if !hasKey && method.Passive {
return amqp.NewSoftError(404, "Exchange does not exist", classId, methodId)
}
if hasKey {
// if diskLoad {
// panic(fmt.Sprintf("Can't disk load a key that exists: %s", ex.Name))
// }
if existing.ExType != ex.ExType {
return amqp.NewHardError(530, "Cannot redeclare an exchange with a different type", classId, methodId)
}
if existing.EquivalentExchanges(ex) {
if !method.NoWait {
channel.SendMethod(&amqp.ExchangeDeclareOk{})
}
return nil
}
// Not equivalent, error in passive mode
if method.Passive {
return amqp.NewSoftError(406, "Exchange with this name already exists", classId, methodId)
}
}
if method.Passive {
if !method.NoWait {
channel.SendMethod(&amqp.ExchangeDeclareOk{})
}
return nil
}
// outside of passive mode you can't create an exchange starting with
// amq.
if strings.HasPrefix(method.Exchange, "amq.") {
return amqp.NewSoftError(403, "Exchange names starting with 'amq.' are reserved", classId, methodId)
}
err = channel.server.addExchange(ex)
if err != nil {
return amqp.NewSoftError(500, err.Error(), classId, methodId)
}
err = ex.Persist(channel.server.db)
if err != nil {
return amqp.NewSoftError(500, err.Error(), classId, methodId)
}
if !method.NoWait {
channel.SendMethod(&amqp.ExchangeDeclareOk{})
}
return nil
}
