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|
package amqp
import (
"errors"
"github.com/NeowayLabs/wabbit"
"github.com/NeowayLabs/wabbit/utils"
"github.com/streadway/amqp"
)
// Channel is a wrapper channel structure for amqp.Channel
type Channel struct {
*amqp.Channel
}
func (ch *Channel) Publish(exc, route string, msg []byte, opt wabbit.Option) error {
amqpOpt, err := utils.ConvertOpt(opt)
if err != nil {
return err
}
amqpOpt.Body = msg
return ch.Channel.Publish(
exc, // publish to an exchange
route, // routing to 0 or more queues
false, // mandatory
false, // immediate
amqpOpt,
)
}
func (ch *Channel) Confirm(noWait bool) error {
return ch.Channel.Confirm(noWait)
}
func (ch *Channel) NotifyPublish(confirm chan wabbit.Confirmation) chan wabbit.Confirmation {
amqpConfirms := ch.Channel.NotifyPublish(make(chan amqp.Confirmation, cap(confirm)))
go func() {
for c := range amqpConfirms {
confirm <- Confirmation{c}
}
close(confirm)
}()
return confirm
}
func (ch *Channel) Consume(queue, consumer string, opt wabbit.Option) (<-chan wabbit.Delivery, error) {
var (
autoAck, exclusive, noLocal, noWait bool
args amqp.Table
)
if v, ok := opt["autoAck"]; ok {
autoAck, ok = v.(bool)
if !ok {
return nil, errors.New("durable option is of type bool")
}
}
if v, ok := opt["exclusive"]; ok {
exclusive, ok = v.(bool)
if !ok {
return nil, errors.New("exclusive option is of type bool")
}
}
if v, ok := opt["noLocal"]; ok {
noLocal, ok = v.(bool)
if !ok {
return nil, errors.New("noLocal option is of type bool")
}
}
if v, ok := opt["noWait"]; ok {
noWait, ok = v.(bool)
if !ok {
return nil, errors.New("noWait option is of type bool")
}
}
if v, ok := opt["args"]; ok {
args, ok = v.(amqp.Table)
if !ok {
return nil, errors.New("args is of type amqp.Table")
}
}
amqpd, err := ch.Channel.Consume(queue, consumer, autoAck, exclusive, noLocal, noWait, args)
if err != nil {
return nil, err
}
deliveries := make(chan wabbit.Delivery)
go func() {
for d := range amqpd {
delivery := d
deliveries <- &Delivery{&delivery}
}
close(deliveries)
}()
return deliveries, nil
}
func (ch *Channel) ExchangeDeclare(name, kind string, opt wabbit.Option) error {
return ch.exchangeDeclare(name, kind, false, opt)
}
func (ch *Channel) ExchangeDeclarePassive(name, kind string, opt wabbit.Option) error {
return ch.exchangeDeclare(name, kind, true, opt)
}
func (ch *Channel) exchangeDeclare(name, kind string, passive bool, opt wabbit.Option) error {
var (
durable, autoDelete, internal, noWait bool
args amqp.Table
)
if v, ok := opt["durable"]; ok {
durable, ok = v.(bool)
if !ok {
return errors.New("durable option is of type bool")
}
}
if v, ok := opt["autoDelete"]; ok {
autoDelete, ok = v.(bool)
if !ok {
return errors.New("autoDelete option is of type bool")
}
}
if v, ok := opt["internal"]; ok {
internal, ok = v.(bool)
if !ok {
return errors.New("internal option is of type bool")
}
}
if v, ok := opt["noWait"]; ok {
noWait, ok = v.(bool)
if !ok {
return errors.New("noWait option is of type bool")
}
}
if v, ok := opt["args"]; ok {
args, ok = v.(amqp.Table)
if !ok {
return errors.New("args is of type amqp.Table")
}
}
if passive {
return ch.Channel.ExchangeDeclarePassive(name, kind, durable, autoDelete, internal, noWait, args)
}
return ch.Channel.ExchangeDeclare(name, kind, durable, autoDelete, internal, noWait, args)
}
func (ch *Channel) QueueUnbind(name, route, exchange string, _ wabbit.Option) error {
return ch.Channel.QueueUnbind(name, route, exchange, nil)
}
// QueueBind binds the route key to queue
func (ch *Channel) QueueBind(name, key, exchange string, opt wabbit.Option) error {
var (
noWait bool
args amqp.Table
)
if v, ok := opt["noWait"]; ok {
noWait, ok = v.(bool)
if !ok {
return errors.New("noWait option is of type bool")
}
}
if v, ok := opt["args"]; ok {
args, ok = v.(amqp.Table)
if !ok {
return errors.New("args is of type amqp.Table")
}
}
return ch.Channel.QueueBind(name, key, exchange, noWait, args)
}
// QueueDeclare declares a new AMQP queue
func (ch *Channel) QueueDeclare(name string, opt wabbit.Option) (wabbit.Queue, error) {
return ch.queueDeclare(name, false, opt)
}
// QueueDeclarePassive declares an existing AMQP queue
func (ch *Channel) QueueDeclarePassive(name string, opt wabbit.Option) (wabbit.Queue, error) {
return ch.queueDeclare(name, true, opt)
}
func (ch *Channel) queueDeclare(name string, passive bool, opt wabbit.Option) (wabbit.Queue, error) {
var (
durable, autoDelete, exclusive, noWait bool
args amqp.Table
)
if v, ok := opt["durable"]; ok {
durable, ok = v.(bool)
if !ok {
return nil, errors.New("durable option is of type bool")
}
}
if v, ok := opt["autoDelete"]; ok {
autoDelete, ok = v.(bool)
if !ok {
return nil, errors.New("autoDelete option is of type bool")
}
}
if v, ok := opt["exclusive"]; ok {
exclusive, ok = v.(bool)
if !ok {
return nil, errors.New("Exclusive option is of type bool")
}
}
if v, ok := opt["noWait"]; ok {
noWait, ok = v.(bool)
if !ok {
return nil, errors.New("noWait option is of type bool")
}
}
if v, ok := opt["args"]; ok {
args, ok = v.(amqp.Table)
if !ok {
return nil, errors.New("args is of type amqp.Table")
}
}
var q amqp.Queue
var err error
if passive {
q, err = ch.Channel.QueueDeclarePassive(name, durable, autoDelete, exclusive, noWait, args)
} else {
q, err = ch.Channel.QueueDeclare(name, durable, autoDelete, exclusive, noWait, args)
}
if err != nil {
return nil, err
}
return &Queue{&q}, nil
}
func (ch *Channel) QueueDelete(name string, opt wabbit.Option) (int, error) {
var (
ifUnused, ifEmpty, noWait bool
)
if v, ok := opt["ifUnused"]; ok {
ifUnused, ok = v.(bool)
if !ok {
return 0, errors.New("ifUnused option is of type bool")
}
}
if v, ok := opt["ifEmpty"]; ok {
ifEmpty, ok = v.(bool)
if !ok {
return 0, errors.New("ifEmpty option is of type bool")
}
}
if v, ok := opt["noWait"]; ok {
noWait, ok = v.(bool)
if !ok {
return 0, errors.New("noWait option is of type bool")
}
}
return ch.Channel.QueueDelete(name, ifUnused, ifEmpty, noWait)
}
// Qos controls how many bytes or messages will be handled by channel or connection.
func (ch *Channel) Qos(prefetchCount, prefetchSize int, global bool) error {
return ch.Channel.Qos(prefetchCount, prefetchSize, global)
}
// NotifyClose registers a listener for close events.
// For more information see: https://godoc.org/github.com/streadway/amqp#Channel.NotifyClose
func (ch *Channel) NotifyClose(c chan wabbit.Error) chan wabbit.Error {
amqpErr := ch.Channel.NotifyClose(make(chan *amqp.Error, cap(c)))
go func() {
for err := range amqpErr {
var ne wabbit.Error
if err != nil {
ne = utils.NewError(
err.Code,
err.Reason,
err.Server,
err.Recover,
)
} else {
ne = nil
}
c <- ne
}
close(c)
}()
return c
}
|
