148 lines
2.6 KiB
Go
148 lines
2.6 KiB
Go
package transport
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//
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// All credit to Mondo
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//
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import (
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"strings"
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"sync"
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"time"
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"github.com/streadway/amqp"
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)
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var (
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DefaultExchange = "micro"
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DefaultRabbitURL = "amqp://guest:guest@127.0.0.1:5672"
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)
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type rabbitMQConn struct {
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Connection *amqp.Connection
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Channel *rabbitMQChannel
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ExchangeChannel *rabbitMQChannel
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notify chan bool
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exchange string
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url string
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connected bool
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mtx sync.Mutex
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close chan bool
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closed bool
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}
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func newRabbitMQConn(exchange string, urls []string) *rabbitMQConn {
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var url string
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if len(urls) > 0 && strings.HasPrefix(urls[0], "amqp://") {
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url = urls[0]
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} else {
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url = DefaultRabbitURL
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}
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if len(exchange) == 0 {
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exchange = DefaultExchange
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}
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return &rabbitMQConn{
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exchange: exchange,
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url: url,
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notify: make(chan bool, 1),
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close: make(chan bool),
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}
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}
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func (r *rabbitMQConn) Init() chan bool {
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go r.Connect(r.notify)
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return r.notify
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}
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func (r *rabbitMQConn) Connect(connected chan bool) {
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for {
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if err := r.tryToConnect(); err != nil {
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time.Sleep(1 * time.Second)
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continue
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}
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connected <- true
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r.connected = true
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notifyClose := make(chan *amqp.Error)
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r.Connection.NotifyClose(notifyClose)
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// Block until we get disconnected, or shut down
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select {
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case <-notifyClose:
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// Spin around and reconnect
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r.connected = false
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case <-r.close:
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// Shut down connection
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if err := r.Connection.Close(); err != nil {
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}
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r.connected = false
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return
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}
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}
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}
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func (r *rabbitMQConn) IsConnected() bool {
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return r.connected
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}
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func (r *rabbitMQConn) Close() {
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r.mtx.Lock()
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defer r.mtx.Unlock()
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if r.closed {
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return
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}
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close(r.close)
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r.closed = true
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}
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func (r *rabbitMQConn) tryToConnect() error {
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var err error
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r.Connection, err = amqp.Dial(r.url)
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if err != nil {
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return err
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}
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r.Channel, err = newRabbitChannel(r.Connection)
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if err != nil {
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return err
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}
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r.Channel.DeclareExchange(r.exchange)
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r.ExchangeChannel, err = newRabbitChannel(r.Connection)
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if err != nil {
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return err
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}
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return nil
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}
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func (r *rabbitMQConn) Consume(queue string) (<-chan amqp.Delivery, error) {
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consumerChannel, err := newRabbitChannel(r.Connection)
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if err != nil {
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return nil, err
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}
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err = consumerChannel.DeclareQueue(queue)
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if err != nil {
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return nil, err
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}
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deliveries, err := consumerChannel.ConsumeQueue(queue)
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if err != nil {
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return nil, err
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}
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err = consumerChannel.BindQueue(queue, r.exchange)
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if err != nil {
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return nil, err
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}
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return deliveries, nil
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}
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func (r *rabbitMQConn) Publish(exchange, key string, msg amqp.Publishing) error {
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return r.ExchangeChannel.Publish(exchange, key, msg)
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}
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