forked from st3v/go-plugins
/
connection.go
165 lines (136 loc) · 3.17 KB
/
connection.go
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package rabbitmq
//
// All credit to Mondo
//
import (
"crypto/tls"
"regexp"
"strings"
"sync"
"time"
"github.com/streadway/amqp"
)
var (
DefaultExchange = "micro"
DefaultRabbitURL = "amqp://guest:guest@127.0.0.1:5672"
dial = amqp.Dial
dialTLS = amqp.DialTLS
)
type rabbitMQConn struct {
Connection *amqp.Connection
Channel *rabbitMQChannel
ExchangeChannel *rabbitMQChannel
notify chan bool
exchange string
url string
connected bool
mtx sync.Mutex
close chan bool
closed bool
}
func newRabbitMQConn(exchange string, urls []string) *rabbitMQConn {
var url string
if len(urls) > 0 && regexp.MustCompile("^amqp(s)?://.*").MatchString(urls[0]) {
url = urls[0]
} else {
url = DefaultRabbitURL
}
if len(exchange) == 0 {
exchange = DefaultExchange
}
return &rabbitMQConn{
exchange: exchange,
url: url,
notify: make(chan bool, 1),
close: make(chan bool),
}
}
func (r *rabbitMQConn) Init(secure bool, config *tls.Config) chan bool {
go r.Connect(secure, config, r.notify)
return r.notify
}
func (r *rabbitMQConn) Connect(secure bool, config *tls.Config, connected chan bool) {
for {
if err := r.tryToConnect(secure, config); err != nil {
time.Sleep(1 * time.Second)
continue
}
connected <- true
r.connected = true
notifyClose := make(chan *amqp.Error)
r.Connection.NotifyClose(notifyClose)
// Block until we get disconnected, or shut down
select {
case <-notifyClose:
// Spin around and reconnect
r.connected = false
case <-r.close:
// Shut down connection
if err := r.Connection.Close(); err != nil {
}
r.connected = false
return
}
}
}
func (r *rabbitMQConn) IsConnected() bool {
return r.connected
}
func (r *rabbitMQConn) Close() {
r.mtx.Lock()
defer r.mtx.Unlock()
if r.closed {
return
}
close(r.close)
r.closed = true
}
func (r *rabbitMQConn) tryToConnect(secure bool, config *tls.Config) error {
var err error
if secure || config != nil || strings.HasPrefix(r.url, "amqps://") {
if config == nil {
config = &tls.Config{
InsecureSkipVerify: true,
}
}
url := strings.Replace(r.url, "amqp://", "amqps://", 1)
r.Connection, err = dialTLS(url, config)
} else {
r.Connection, err = dial(r.url)
}
if err != nil {
return err
}
r.Channel, err = newRabbitChannel(r.Connection)
if err != nil {
return err
}
r.Channel.DeclareExchange(r.exchange)
r.ExchangeChannel, err = newRabbitChannel(r.Connection)
if err != nil {
return err
}
return nil
}
func (r *rabbitMQConn) Consume(queue, key string, autoAck bool) (*rabbitMQChannel, <-chan amqp.Delivery, error) {
consumerChannel, err := newRabbitChannel(r.Connection)
if err != nil {
return nil, nil, err
}
err = consumerChannel.DeclareQueue(queue)
if err != nil {
return nil, nil, err
}
deliveries, err := consumerChannel.ConsumeQueue(queue, autoAck)
if err != nil {
return nil, nil, err
}
err = consumerChannel.BindQueue(queue, key, r.exchange)
if err != nil {
return nil, nil, err
}
return consumerChannel, deliveries, nil
}
func (r *rabbitMQConn) Publish(exchange, key string, msg amqp.Publishing) error {
return r.ExchangeChannel.Publish(exchange, key, msg)
}