2015-04-26 20:33:35 +02:00
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package broker
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import (
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"bytes"
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2018-03-03 13:53:52 +02:00
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"context"
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2016-01-17 00:13:02 +02:00
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"crypto/tls"
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2017-10-26 21:48:11 +02:00
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"errors"
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2015-04-26 20:33:35 +02:00
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"fmt"
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2015-12-23 22:05:47 +02:00
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"io"
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2015-04-26 20:33:35 +02:00
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"io/ioutil"
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2015-12-23 22:05:47 +02:00
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"math/rand"
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2015-04-26 20:33:35 +02:00
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"net"
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"net/http"
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2016-01-17 00:13:02 +02:00
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"net/url"
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"runtime"
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2015-04-26 20:33:35 +02:00
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"strconv"
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"strings"
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"sync"
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2015-12-23 22:05:47 +02:00
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"time"
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2015-04-26 20:33:35 +02:00
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2018-11-21 12:13:03 +02:00
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"github.com/google/uuid"
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2019-01-10 11:42:02 +02:00
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"github.com/micro/go-micro/codec/json"
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2017-10-26 21:48:11 +02:00
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merr "github.com/micro/go-micro/errors"
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2015-11-20 18:17:33 +02:00
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"github.com/micro/go-micro/registry"
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2019-06-03 16:56:22 +02:00
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"github.com/micro/go-micro/registry/cache"
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2019-05-31 00:52:10 +02:00
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maddr "github.com/micro/go-micro/util/addr"
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mnet "github.com/micro/go-micro/util/net"
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mls "github.com/micro/go-micro/util/tls"
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2018-11-29 14:10:33 +02:00
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"golang.org/x/net/http2"
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2015-04-26 20:33:35 +02:00
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)
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2017-10-26 21:48:11 +02:00
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// HTTP Broker is a point to point async broker
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2015-05-23 21:04:16 +02:00
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type httpBroker struct {
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2017-10-26 21:48:11 +02:00
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id string
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address string
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opts Options
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2015-04-26 20:33:35 +02:00
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2016-03-22 20:02:50 +02:00
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mux *http.ServeMux
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2017-10-28 14:55:59 +02:00
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c *http.Client
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r registry.Registry
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2016-01-17 00:13:02 +02:00
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2015-04-26 20:33:35 +02:00
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sync.RWMutex
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2015-05-23 21:04:16 +02:00
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subscribers map[string][]*httpSubscriber
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2015-04-26 20:33:35 +02:00
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running bool
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exit chan chan error
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2019-01-02 21:27:46 +02:00
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// offline message inbox
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mtx sync.RWMutex
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inbox map[string][][]byte
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2015-04-26 20:33:35 +02:00
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}
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2015-05-23 21:04:16 +02:00
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type httpSubscriber struct {
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2015-12-23 21:07:26 +02:00
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opts SubscribeOptions
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2015-04-26 20:33:35 +02:00
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id string
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topic string
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2015-06-12 20:52:27 +02:00
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fn Handler
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2015-05-25 23:14:28 +02:00
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svc *registry.Service
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2017-10-26 21:48:11 +02:00
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hb *httpBroker
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2015-04-26 20:33:35 +02:00
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}
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2019-07-07 13:44:09 +02:00
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type httpEvent struct {
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2015-12-23 21:07:26 +02:00
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m *Message
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t string
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}
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2015-04-26 20:33:35 +02:00
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var (
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2015-12-23 22:05:47 +02:00
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DefaultSubPath = "/_sub"
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broadcastVersion = "ff.http.broadcast"
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2016-01-27 22:17:31 +02:00
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registerTTL = time.Minute
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registerInterval = time.Second * 30
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2015-04-26 20:33:35 +02:00
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)
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2015-12-23 22:05:47 +02:00
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func init() {
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rand.Seed(time.Now().Unix())
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}
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2016-01-17 02:33:07 +02:00
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func newTransport(config *tls.Config) *http.Transport {
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if config == nil {
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config = &tls.Config{
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InsecureSkipVerify: true,
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}
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}
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2018-11-29 14:10:33 +02:00
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dialTLS := func(network string, addr string) (net.Conn, error) {
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return tls.Dial(network, addr, config)
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}
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2016-01-17 00:13:02 +02:00
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t := &http.Transport{
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Proxy: http.ProxyFromEnvironment,
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Dial: (&net.Dialer{
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Timeout: 30 * time.Second,
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KeepAlive: 30 * time.Second,
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}).Dial,
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TLSHandshakeTimeout: 10 * time.Second,
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2018-11-29 14:10:33 +02:00
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DialTLS: dialTLS,
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2016-01-17 00:13:02 +02:00
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}
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runtime.SetFinalizer(&t, func(tr **http.Transport) {
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(*tr).CloseIdleConnections()
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})
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2018-11-29 14:10:33 +02:00
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// setup http2
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http2.ConfigureTransport(t)
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2016-01-17 00:13:02 +02:00
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return t
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}
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2016-03-16 00:12:28 +02:00
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func newHttpBroker(opts ...Option) Broker {
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2016-01-20 17:22:44 +02:00
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options := Options{
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2019-01-10 11:42:02 +02:00
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Codec: json.Marshaler{},
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2016-01-20 17:22:44 +02:00
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Context: context.TODO(),
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}
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2016-01-17 01:05:11 +02:00
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for _, o := range opts {
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o(&options)
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}
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2017-10-26 21:48:11 +02:00
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// set address
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2015-05-23 21:04:16 +02:00
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addr := ":0"
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2016-03-16 00:12:28 +02:00
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if len(options.Addrs) > 0 && len(options.Addrs[0]) > 0 {
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addr = options.Addrs[0]
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2015-05-23 21:04:16 +02:00
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}
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2017-10-26 21:48:11 +02:00
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// get registry
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2016-01-20 17:22:44 +02:00
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reg, ok := options.Context.Value(registryKey).(registry.Registry)
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if !ok {
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reg = registry.DefaultRegistry
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}
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2016-03-22 20:02:50 +02:00
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h := &httpBroker{
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2018-11-21 12:13:03 +02:00
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id: "broker-" + uuid.New().String(),
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2015-05-23 21:04:16 +02:00
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address: addr,
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2016-01-17 01:05:11 +02:00
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opts: options,
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2016-01-20 17:22:44 +02:00
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r: reg,
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2016-01-17 02:33:07 +02:00
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c: &http.Client{Transport: newTransport(options.TLSConfig)},
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2015-05-23 21:04:16 +02:00
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subscribers: make(map[string][]*httpSubscriber),
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exit: make(chan chan error),
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2016-03-22 20:02:50 +02:00
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mux: http.NewServeMux(),
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2019-01-02 21:27:46 +02:00
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inbox: make(map[string][][]byte),
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2015-05-23 21:04:16 +02:00
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}
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2016-03-22 20:02:50 +02:00
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2018-11-18 22:40:43 +02:00
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// specify the message handler
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2016-03-22 20:02:50 +02:00
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h.mux.Handle(DefaultSubPath, h)
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2018-11-18 22:40:43 +02:00
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// get optional handlers
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if h.opts.Context != nil {
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handlers, ok := h.opts.Context.Value("http_handlers").(map[string]http.Handler)
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if ok {
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for pattern, handler := range handlers {
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h.mux.Handle(pattern, handler)
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}
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}
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}
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2016-03-22 20:02:50 +02:00
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return h
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2015-05-23 21:04:16 +02:00
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}
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2019-07-07 13:44:09 +02:00
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func (h *httpEvent) Ack() error {
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2015-12-23 21:07:26 +02:00
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return nil
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}
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2019-07-07 13:44:09 +02:00
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func (h *httpEvent) Message() *Message {
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2015-12-23 21:07:26 +02:00
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return h.m
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}
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2019-07-07 13:44:09 +02:00
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func (h *httpEvent) Topic() string {
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2015-12-23 21:07:26 +02:00
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return h.t
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}
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2015-12-31 20:11:46 +02:00
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func (h *httpSubscriber) Options() SubscribeOptions {
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2015-12-23 21:07:26 +02:00
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return h.opts
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}
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2015-05-23 21:04:16 +02:00
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func (h *httpSubscriber) Topic() string {
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2015-04-26 20:33:35 +02:00
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return h.topic
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}
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2015-05-23 21:04:16 +02:00
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func (h *httpSubscriber) Unsubscribe() error {
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2017-10-26 21:48:11 +02:00
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return h.hb.unsubscribe(h)
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}
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2019-01-02 21:27:46 +02:00
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func (h *httpBroker) saveMessage(topic string, msg []byte) {
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h.mtx.Lock()
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defer h.mtx.Unlock()
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// get messages
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c := h.inbox[topic]
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// save message
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c = append(c, msg)
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// max length 64
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if len(c) > 64 {
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c = c[:64]
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}
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// save inbox
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h.inbox[topic] = c
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}
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func (h *httpBroker) getMessage(topic string, num int) [][]byte {
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h.mtx.Lock()
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defer h.mtx.Unlock()
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// get messages
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c, ok := h.inbox[topic]
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if !ok {
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return nil
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}
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// more message than requests
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if len(c) >= num {
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msg := c[:num]
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h.inbox[topic] = c[num:]
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return msg
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}
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// reset inbox
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h.inbox[topic] = nil
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// return all messages
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return c
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}
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2017-10-26 21:48:11 +02:00
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func (h *httpBroker) subscribe(s *httpSubscriber) error {
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h.Lock()
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defer h.Unlock()
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if err := h.r.Register(s.svc, registry.RegisterTTL(registerTTL)); err != nil {
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return err
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}
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h.subscribers[s.topic] = append(h.subscribers[s.topic], s)
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return nil
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}
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func (h *httpBroker) unsubscribe(s *httpSubscriber) error {
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h.Lock()
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defer h.Unlock()
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var subscribers []*httpSubscriber
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// look for subscriber
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for _, sub := range h.subscribers[s.topic] {
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// deregister and skip forward
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if sub.id == s.id {
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2018-11-13 10:56:21 +02:00
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_ = h.r.Deregister(sub.svc)
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2017-10-26 21:48:11 +02:00
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continue
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}
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// keep subscriber
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subscribers = append(subscribers, sub)
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}
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// set subscribers
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h.subscribers[s.topic] = subscribers
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2015-04-26 20:33:35 +02:00
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return nil
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}
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2016-01-27 22:17:31 +02:00
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func (h *httpBroker) run(l net.Listener) {
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t := time.NewTicker(registerInterval)
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defer t.Stop()
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for {
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select {
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// heartbeat for each subscriber
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case <-t.C:
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h.RLock()
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for _, subs := range h.subscribers {
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for _, sub := range subs {
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2018-11-13 10:56:21 +02:00
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_ = h.r.Register(sub.svc, registry.RegisterTTL(registerTTL))
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2016-01-27 22:17:31 +02:00
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}
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}
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h.RUnlock()
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// received exit signal
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case ch := <-h.exit:
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ch <- l.Close()
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2017-10-26 21:48:11 +02:00
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h.RLock()
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for _, subs := range h.subscribers {
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for _, sub := range subs {
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2018-11-13 10:56:21 +02:00
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_ = h.r.Deregister(sub.svc)
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2016-01-27 22:17:31 +02:00
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}
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}
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2017-10-26 21:48:11 +02:00
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h.RUnlock()
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return
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}
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}
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}
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func (h *httpBroker) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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if req.Method != "POST" {
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err := merr.BadRequest("go.micro.broker", "Method not allowed")
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http.Error(w, err.Error(), http.StatusMethodNotAllowed)
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return
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}
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defer req.Body.Close()
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req.ParseForm()
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b, err := ioutil.ReadAll(req.Body)
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if err != nil {
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errr := merr.InternalServerError("go.micro.broker", "Error reading request body: %v", err)
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w.WriteHeader(500)
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w.Write([]byte(errr.Error()))
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return
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}
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var m *Message
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if err = h.opts.Codec.Unmarshal(b, &m); err != nil {
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errr := merr.InternalServerError("go.micro.broker", "Error parsing request body: %v", err)
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w.WriteHeader(500)
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w.Write([]byte(errr.Error()))
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return
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}
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topic := m.Header[":topic"]
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delete(m.Header, ":topic")
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if len(topic) == 0 {
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errr := merr.InternalServerError("go.micro.broker", "Topic not found")
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w.WriteHeader(500)
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w.Write([]byte(errr.Error()))
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return
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}
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2019-07-07 13:44:09 +02:00
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p := &httpEvent{m: m, t: topic}
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2017-10-26 21:48:11 +02:00
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id := req.Form.Get("id")
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h.RLock()
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for _, subscriber := range h.subscribers[topic] {
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if id == subscriber.id {
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// sub is sync; crufty rate limiting
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// so we don't hose the cpu
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subscriber.fn(p)
|
2016-01-27 22:17:31 +02:00
|
|
|
}
|
|
|
|
}
|
2017-10-26 21:48:11 +02:00
|
|
|
h.RUnlock()
|
|
|
|
}
|
|
|
|
|
|
|
|
func (h *httpBroker) Address() string {
|
|
|
|
h.RLock()
|
|
|
|
defer h.RUnlock()
|
|
|
|
return h.address
|
2016-01-27 22:17:31 +02:00
|
|
|
}
|
|
|
|
|
2017-10-26 21:48:11 +02:00
|
|
|
func (h *httpBroker) Connect() error {
|
2018-06-13 08:28:39 +02:00
|
|
|
h.RLock()
|
2015-04-26 20:33:35 +02:00
|
|
|
if h.running {
|
2018-06-13 08:28:39 +02:00
|
|
|
h.RUnlock()
|
2015-04-26 20:33:35 +02:00
|
|
|
return nil
|
|
|
|
}
|
2018-06-13 08:28:39 +02:00
|
|
|
h.RUnlock()
|
|
|
|
|
|
|
|
h.Lock()
|
|
|
|
defer h.Unlock()
|
2015-04-26 20:33:35 +02:00
|
|
|
|
2016-01-17 01:05:11 +02:00
|
|
|
var l net.Listener
|
|
|
|
var err error
|
|
|
|
|
2016-01-17 02:33:07 +02:00
|
|
|
if h.opts.Secure || h.opts.TLSConfig != nil {
|
2016-01-17 01:39:47 +02:00
|
|
|
config := h.opts.TLSConfig
|
2017-01-12 16:11:25 +02:00
|
|
|
|
|
|
|
fn := func(addr string) (net.Listener, error) {
|
|
|
|
if config == nil {
|
|
|
|
hosts := []string{addr}
|
|
|
|
|
|
|
|
// check if its a valid host:port
|
|
|
|
if host, _, err := net.SplitHostPort(addr); err == nil {
|
|
|
|
if len(host) == 0 {
|
|
|
|
hosts = maddr.IPs()
|
|
|
|
} else {
|
|
|
|
hosts = []string{host}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// generate a certificate
|
|
|
|
cert, err := mls.Certificate(hosts...)
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
config = &tls.Config{Certificates: []tls.Certificate{cert}}
|
2016-01-17 01:39:47 +02:00
|
|
|
}
|
2017-01-12 16:11:25 +02:00
|
|
|
return tls.Listen("tcp", addr, config)
|
2016-01-17 01:05:11 +02:00
|
|
|
}
|
2017-01-12 16:11:25 +02:00
|
|
|
|
|
|
|
l, err = mnet.Listen(h.address, fn)
|
2016-01-17 01:05:11 +02:00
|
|
|
} else {
|
2017-01-12 16:11:25 +02:00
|
|
|
fn := func(addr string) (net.Listener, error) {
|
|
|
|
return net.Listen("tcp", addr)
|
|
|
|
}
|
|
|
|
|
|
|
|
l, err = mnet.Listen(h.address, fn)
|
2016-01-17 01:05:11 +02:00
|
|
|
}
|
|
|
|
|
2015-04-26 20:33:35 +02:00
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
2018-05-25 16:19:25 +02:00
|
|
|
addr := h.address
|
2015-04-26 20:33:35 +02:00
|
|
|
h.address = l.Addr().String()
|
|
|
|
|
2016-03-22 20:02:50 +02:00
|
|
|
go http.Serve(l, h.mux)
|
2018-05-25 16:19:25 +02:00
|
|
|
go func() {
|
|
|
|
h.run(l)
|
|
|
|
h.Lock()
|
2019-07-07 13:33:47 +02:00
|
|
|
h.opts.Addrs = []string{addr}
|
2018-05-25 16:19:25 +02:00
|
|
|
h.address = addr
|
|
|
|
h.Unlock()
|
|
|
|
}()
|
2015-04-26 20:33:35 +02:00
|
|
|
|
2017-10-26 21:48:11 +02:00
|
|
|
// get registry
|
|
|
|
reg, ok := h.opts.Context.Value(registryKey).(registry.Registry)
|
|
|
|
if !ok {
|
|
|
|
reg = registry.DefaultRegistry
|
|
|
|
}
|
2019-05-31 17:19:31 +02:00
|
|
|
// set cache
|
|
|
|
h.r = cache.New(reg)
|
2017-10-26 21:48:11 +02:00
|
|
|
|
|
|
|
// set running
|
2015-04-26 20:33:35 +02:00
|
|
|
h.running = true
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2017-10-26 21:48:11 +02:00
|
|
|
func (h *httpBroker) Disconnect() error {
|
2016-01-27 22:17:31 +02:00
|
|
|
|
2018-06-13 08:28:39 +02:00
|
|
|
h.RLock()
|
2016-01-27 22:17:31 +02:00
|
|
|
if !h.running {
|
2018-06-13 08:28:39 +02:00
|
|
|
h.RUnlock()
|
2016-01-27 22:17:31 +02:00
|
|
|
return nil
|
|
|
|
}
|
2018-06-13 08:28:39 +02:00
|
|
|
h.RUnlock()
|
|
|
|
|
|
|
|
h.Lock()
|
|
|
|
defer h.Unlock()
|
2016-01-27 22:17:31 +02:00
|
|
|
|
2019-05-31 17:19:31 +02:00
|
|
|
// stop cache
|
|
|
|
rc, ok := h.r.(cache.Cache)
|
2017-10-26 21:48:11 +02:00
|
|
|
if ok {
|
|
|
|
rc.Stop()
|
|
|
|
}
|
|
|
|
|
|
|
|
// exit and return err
|
2015-04-26 20:33:35 +02:00
|
|
|
ch := make(chan error)
|
|
|
|
h.exit <- ch
|
2016-01-27 22:17:31 +02:00
|
|
|
err := <-ch
|
2017-10-26 21:48:11 +02:00
|
|
|
|
|
|
|
// set not running
|
2016-01-27 22:17:31 +02:00
|
|
|
h.running = false
|
|
|
|
return err
|
2015-04-26 20:33:35 +02:00
|
|
|
}
|
|
|
|
|
2017-10-26 21:48:11 +02:00
|
|
|
func (h *httpBroker) Init(opts ...Option) error {
|
2018-06-13 08:28:39 +02:00
|
|
|
h.RLock()
|
2017-10-26 21:48:11 +02:00
|
|
|
if h.running {
|
2018-06-13 08:28:39 +02:00
|
|
|
h.RUnlock()
|
2017-10-26 21:48:11 +02:00
|
|
|
return errors.New("cannot init while connected")
|
2015-04-26 20:33:35 +02:00
|
|
|
}
|
2018-06-13 08:28:39 +02:00
|
|
|
h.RUnlock()
|
|
|
|
|
|
|
|
h.Lock()
|
|
|
|
defer h.Unlock()
|
2015-04-26 20:33:35 +02:00
|
|
|
|
2016-01-17 01:05:11 +02:00
|
|
|
for _, o := range opts {
|
2016-01-17 01:10:14 +02:00
|
|
|
o(&h.opts)
|
2016-01-17 01:05:11 +02:00
|
|
|
}
|
|
|
|
|
2018-08-18 18:28:58 +02:00
|
|
|
if len(h.opts.Addrs) > 0 && len(h.opts.Addrs[0]) > 0 {
|
|
|
|
h.address = h.opts.Addrs[0]
|
|
|
|
}
|
|
|
|
|
2015-04-26 20:33:35 +02:00
|
|
|
if len(h.id) == 0 {
|
2018-11-21 12:13:03 +02:00
|
|
|
h.id = "broker-" + uuid.New().String()
|
2015-04-26 20:33:35 +02:00
|
|
|
}
|
|
|
|
|
2017-10-26 21:48:11 +02:00
|
|
|
// get registry
|
2016-01-20 17:22:44 +02:00
|
|
|
reg, ok := h.opts.Context.Value(registryKey).(registry.Registry)
|
|
|
|
if !ok {
|
|
|
|
reg = registry.DefaultRegistry
|
|
|
|
}
|
|
|
|
|
2019-05-31 17:19:31 +02:00
|
|
|
// get cache
|
|
|
|
if rc, ok := h.r.(cache.Cache); ok {
|
2017-10-26 21:48:11 +02:00
|
|
|
rc.Stop()
|
|
|
|
}
|
|
|
|
|
|
|
|
// set registry
|
2019-05-31 17:19:31 +02:00
|
|
|
h.r = cache.New(reg)
|
2016-01-20 17:22:44 +02:00
|
|
|
|
2018-11-29 14:10:33 +02:00
|
|
|
// reconfigure tls config
|
|
|
|
if c := h.opts.TLSConfig; c != nil {
|
|
|
|
h.c = &http.Client{
|
|
|
|
Transport: newTransport(c),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-04-26 20:33:35 +02:00
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2015-12-31 20:11:46 +02:00
|
|
|
func (h *httpBroker) Options() Options {
|
|
|
|
return h.opts
|
|
|
|
}
|
|
|
|
|
2015-12-23 21:07:26 +02:00
|
|
|
func (h *httpBroker) Publish(topic string, msg *Message, opts ...PublishOption) error {
|
2019-01-02 21:27:46 +02:00
|
|
|
// create the message first
|
2016-06-25 04:15:42 +02:00
|
|
|
m := &Message{
|
|
|
|
Header: make(map[string]string),
|
|
|
|
Body: msg.Body,
|
|
|
|
}
|
|
|
|
|
|
|
|
for k, v := range msg.Header {
|
|
|
|
m.Header[k] = v
|
2016-02-22 01:52:08 +02:00
|
|
|
}
|
|
|
|
|
2016-06-25 04:15:42 +02:00
|
|
|
m.Header[":topic"] = topic
|
|
|
|
|
2019-01-02 21:27:46 +02:00
|
|
|
// encode the message
|
2016-12-06 20:37:35 +02:00
|
|
|
b, err := h.opts.Codec.Marshal(m)
|
2015-04-26 20:33:35 +02:00
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
2019-01-02 21:27:46 +02:00
|
|
|
// save the message
|
|
|
|
h.saveMessage(topic, b)
|
|
|
|
|
|
|
|
// now attempt to get the service
|
|
|
|
h.RLock()
|
|
|
|
s, err := h.r.GetService("topic:" + topic)
|
|
|
|
if err != nil {
|
|
|
|
h.RUnlock()
|
|
|
|
// ignore error
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
h.RUnlock()
|
|
|
|
|
2019-01-03 13:23:06 +02:00
|
|
|
pub := func(node *registry.Node, t string, b []byte) error {
|
2016-01-17 00:13:02 +02:00
|
|
|
scheme := "http"
|
2016-01-17 01:05:11 +02:00
|
|
|
|
2016-01-17 00:13:02 +02:00
|
|
|
// check if secure is added in metadata
|
|
|
|
if node.Metadata["secure"] == "true" {
|
|
|
|
scheme = "https"
|
|
|
|
}
|
|
|
|
|
|
|
|
vals := url.Values{}
|
|
|
|
vals.Add("id", node.Id)
|
2016-04-28 01:16:11 +02:00
|
|
|
|
2019-07-08 09:01:42 +02:00
|
|
|
uri := fmt.Sprintf("%s://%s%s?%s", scheme, node.Address, DefaultSubPath, vals.Encode())
|
2016-04-28 01:16:11 +02:00
|
|
|
r, err := h.c.Post(uri, "application/json", bytes.NewReader(b))
|
2019-01-02 21:27:46 +02:00
|
|
|
if err != nil {
|
2019-01-03 13:23:06 +02:00
|
|
|
return err
|
2015-12-23 22:05:47 +02:00
|
|
|
}
|
2019-01-02 21:27:46 +02:00
|
|
|
|
|
|
|
// discard response body
|
|
|
|
io.Copy(ioutil.Discard, r.Body)
|
|
|
|
r.Body.Close()
|
2019-01-03 13:23:06 +02:00
|
|
|
return nil
|
2015-12-23 22:05:47 +02:00
|
|
|
}
|
|
|
|
|
2019-01-02 21:27:46 +02:00
|
|
|
srv := func(s []*registry.Service, b []byte) {
|
|
|
|
for _, service := range s {
|
|
|
|
// only process if we have nodes
|
|
|
|
if len(service.Nodes) == 0 {
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
|
|
|
|
switch service.Version {
|
|
|
|
// broadcast version means broadcast to all nodes
|
|
|
|
case broadcastVersion:
|
2019-01-03 13:23:06 +02:00
|
|
|
var success bool
|
|
|
|
|
|
|
|
// publish to all nodes
|
2019-01-02 21:27:46 +02:00
|
|
|
for _, node := range service.Nodes {
|
|
|
|
// publish async
|
2019-01-03 13:23:06 +02:00
|
|
|
if err := pub(node, topic, b); err == nil {
|
|
|
|
success = true
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// save if it failed to publish at least once
|
|
|
|
if !success {
|
|
|
|
h.saveMessage(topic, b)
|
2019-01-02 21:27:46 +02:00
|
|
|
}
|
|
|
|
default:
|
|
|
|
// select node to publish to
|
|
|
|
node := service.Nodes[rand.Int()%len(service.Nodes)]
|
2016-11-21 16:58:39 +02:00
|
|
|
|
2019-01-03 13:23:06 +02:00
|
|
|
// publish async to one node
|
|
|
|
if err := pub(node, topic, b); err != nil {
|
|
|
|
// if failed save it
|
|
|
|
h.saveMessage(topic, b)
|
|
|
|
}
|
2015-11-08 03:48:48 +02:00
|
|
|
}
|
2016-11-21 16:58:39 +02:00
|
|
|
}
|
2015-04-26 20:33:35 +02:00
|
|
|
}
|
2015-12-23 22:05:47 +02:00
|
|
|
|
2019-01-02 21:27:46 +02:00
|
|
|
// do the rest async
|
|
|
|
go func() {
|
|
|
|
// get a third of the backlog
|
|
|
|
messages := h.getMessage(topic, 8)
|
|
|
|
delay := (len(messages) > 1)
|
|
|
|
|
|
|
|
// publish all the messages
|
|
|
|
for _, msg := range messages {
|
|
|
|
// serialize here
|
|
|
|
srv(s, msg)
|
|
|
|
|
|
|
|
// sending a backlog of messages
|
|
|
|
if delay {
|
|
|
|
time.Sleep(time.Millisecond * 100)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}()
|
|
|
|
|
2015-04-26 20:33:35 +02:00
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2015-12-23 21:07:26 +02:00
|
|
|
func (h *httpBroker) Subscribe(topic string, handler Handler, opts ...SubscribeOption) (Subscriber, error) {
|
2018-11-30 19:32:48 +02:00
|
|
|
options := NewSubscribeOptions(opts...)
|
2015-12-23 21:07:26 +02:00
|
|
|
|
2015-04-26 20:33:35 +02:00
|
|
|
// parse address for host, port
|
|
|
|
parts := strings.Split(h.Address(), ":")
|
|
|
|
host := strings.Join(parts[:len(parts)-1], ":")
|
|
|
|
port, _ := strconv.Atoi(parts[len(parts)-1])
|
|
|
|
|
2017-01-12 16:11:25 +02:00
|
|
|
addr, err := maddr.Extract(host)
|
2016-02-15 23:57:17 +02:00
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
|
2017-10-26 21:48:11 +02:00
|
|
|
// create unique id
|
2018-11-21 12:13:03 +02:00
|
|
|
id := h.id + "." + uuid.New().String()
|
2015-12-27 03:17:53 +02:00
|
|
|
|
2016-01-17 02:33:07 +02:00
|
|
|
var secure bool
|
|
|
|
|
|
|
|
if h.opts.Secure || h.opts.TLSConfig != nil {
|
|
|
|
secure = true
|
|
|
|
}
|
|
|
|
|
2015-04-26 20:33:35 +02:00
|
|
|
// register service
|
2015-05-25 23:14:28 +02:00
|
|
|
node := ®istry.Node{
|
2017-10-26 21:48:11 +02:00
|
|
|
Id: id,
|
2019-07-08 09:01:42 +02:00
|
|
|
Address: fmt.Sprintf("%s:%d", addr, port),
|
2016-01-17 00:13:02 +02:00
|
|
|
Metadata: map[string]string{
|
2016-01-17 02:33:07 +02:00
|
|
|
"secure": fmt.Sprintf("%t", secure),
|
2016-01-17 00:13:02 +02:00
|
|
|
},
|
2015-05-25 23:14:28 +02:00
|
|
|
}
|
|
|
|
|
2017-10-26 21:48:11 +02:00
|
|
|
// check for queue group or broadcast queue
|
|
|
|
version := options.Queue
|
2015-12-23 22:05:47 +02:00
|
|
|
if len(version) == 0 {
|
|
|
|
version = broadcastVersion
|
|
|
|
}
|
|
|
|
|
2015-05-25 23:14:28 +02:00
|
|
|
service := ®istry.Service{
|
2015-12-23 22:05:47 +02:00
|
|
|
Name: "topic:" + topic,
|
|
|
|
Version: version,
|
|
|
|
Nodes: []*registry.Node{node},
|
2015-05-25 23:14:28 +02:00
|
|
|
}
|
2015-04-26 20:33:35 +02:00
|
|
|
|
2017-10-26 21:48:11 +02:00
|
|
|
// generate subscriber
|
2015-05-23 21:04:16 +02:00
|
|
|
subscriber := &httpSubscriber{
|
2017-10-26 21:48:11 +02:00
|
|
|
opts: options,
|
|
|
|
hb: h,
|
|
|
|
id: id,
|
2015-04-26 20:33:35 +02:00
|
|
|
topic: topic,
|
2015-06-12 20:52:27 +02:00
|
|
|
fn: handler,
|
2015-04-26 20:33:35 +02:00
|
|
|
svc: service,
|
|
|
|
}
|
|
|
|
|
2017-10-26 21:48:11 +02:00
|
|
|
// subscribe now
|
|
|
|
if err := h.subscribe(subscriber); err != nil {
|
2015-04-26 20:33:35 +02:00
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
|
2017-10-26 21:48:11 +02:00
|
|
|
// return the subscriber
|
2015-04-26 20:33:35 +02:00
|
|
|
return subscriber, nil
|
|
|
|
}
|
2015-12-19 23:56:14 +02:00
|
|
|
|
|
|
|
func (h *httpBroker) String() string {
|
|
|
|
return "http"
|
|
|
|
}
|