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|
package server
import (
"fmt"
"github.com/NeowayLabs/wabbit"
)
// VHost is a fake AMQP virtual host
type VHost struct {
name string
exchanges map[string]Exchange
queues map[string]*Queue
}
// NewVHost create a new fake AMQP Virtual Host
func NewVHost(name string) *VHost {
vh := VHost{
name: name,
queues: make(map[string]*Queue),
exchanges: make(map[string]Exchange),
}
vh.createDefaultExchanges()
return &vh
}
func (v *VHost) createDefaultExchanges() {
exchs := make(map[string]Exchange)
exchs["amq.topic"] = &TopicExchange{}
exchs["amq.direct"] = &DirectExchange{}
exchs["topic"] = &TopicExchange{}
exchs["direct"] = &DirectExchange{}
exchs[""] = &DirectExchange{
name: "amq.direct",
}
v.exchanges = exchs
}
func (v *VHost) Cancel(consumer string, noWait bool) error {
return nil
}
// Qos isn't implemented in the fake server
func (v *VHost) Qos(prefetchCount, prefetchSize int, global bool) error {
// do nothing. It's a implementation-specific tuning
return nil
}
func (v *VHost) ExchangeDeclare(name, kind string, opt wabbit.Option) error {
return v.exchangeDeclare(name, kind, false, opt)
}
func (v *VHost) ExchangeDeclarePassive(name, kind string, opt wabbit.Option) error {
return v.exchangeDeclare(name, kind, true, opt)
}
func (v *VHost) exchangeDeclare(name, kind string, passive bool, opt wabbit.Option) error {
if _, ok := v.exchanges[name]; ok {
// TODO: We need review this. If the application is trying to re-create an exchange
// using other options we shall not return NIL because this indicates success,
// but we didn't declared anything.
// The AMQP 0.9.1 spec says nothing about that. It only says that AMQP uses the
// "declare" concept instead of the "create" concept. If something is already
// declared it's no problem...
return nil
}
if passive {
return fmt.Errorf("Exception (404) Reason: \"NOT_FOUND - no exchange '%s' in vhost '%s'\"", name, v.name)
}
switch kind {
case "topic":
v.exchanges[name] = NewTopicExchange(name)
case "direct":
v.exchanges[name] = NewDirectExchange(name)
default:
return fmt.Errorf("Invalid exchange type: %s", kind)
}
return nil
}
func (v *VHost) QueueDeclare(name string, args wabbit.Option) (wabbit.Queue, error) {
return v.queueDeclare(name, false, args)
}
func (v *VHost) QueueDeclarePassive(name string, args wabbit.Option) (wabbit.Queue, error) {
return v.queueDeclare(name, true, args)
}
func (v *VHost) queueDeclare(name string, passive bool, args wabbit.Option) (wabbit.Queue, error) {
if q, ok := v.queues[name]; ok {
return q, nil
}
if passive {
return nil, fmt.Errorf("Exception (404) Reason: \"NOT_FOUND - no queue '%s' in vhost '%s'\"", name, v.name)
}
q := NewQueue(name)
v.queues[name] = q
err := v.QueueBind(name, name, "", nil)
if err != nil {
return nil, err
}
return q, nil
}
func (v *VHost) QueueDelete(name string, args wabbit.Option) (int, error) {
delete(v.queues, name)
return 0, nil
}
func (v *VHost) QueueBind(name, key, exchange string, _ wabbit.Option) error {
var (
exch Exchange
q *Queue
ok bool
)
if exch, ok = v.exchanges[exchange]; !ok {
return fmt.Errorf("Unknown exchange '%s'", exchange)
}
if q, ok = v.queues[name]; !ok {
return fmt.Errorf("Unknown queue '%s'", name)
}
exch.addBinding(key, q)
return nil
}
func (v *VHost) QueueUnbind(name, key, exchange string, _ wabbit.Option) error {
var (
exch Exchange
ok bool
)
if exch, ok = v.exchanges[exchange]; !ok {
return fmt.Errorf("Unknown exchange '%s'", exchange)
}
if _, ok = v.queues[name]; !ok {
return fmt.Errorf("Unknown queue '%s'", name)
}
exch.delBinding(key)
return nil
}
// Publish push a new message to queue data channel.
// The queue data channel is a buffered channel of length `QueueMaxLen`. If
// the queue is full, this method will block until some messages are consumed.
func (v *VHost) Publish(exc, route string, d *Delivery, _ wabbit.Option) error {
var (
exch Exchange
ok bool
err error
)
if exch, ok = v.exchanges[exc]; !ok {
return fmt.Errorf("Unknow exchange '%s'", exc)
}
err = exch.route(route, d)
if err != nil {
return err
}
return nil
}
|
