func TestPushed(t *testing.T) {
pc := dialt(t)
defer pc.Close()
nc, err := net.Dial("tcp", ":6379")
if err != nil {
t.Fatal(err)
}
defer nc.Close()
nc.SetReadDeadline(time.Now().Add(4 * time.Second))
c := redis.PubSubConn{Conn: redis.NewConn(nc, 0, 0)}
c.Subscribe("c1")
expectPushed(t, c, "Subscribe(c1)", redis.Subscription{Kind: "subscribe", Channel: "c1", Count: 1})
c.Subscribe("c2")
expectPushed(t, c, "Subscribe(c2)", redis.Subscription{Kind: "subscribe", Channel: "c2", Count: 2})
c.PSubscribe("p1")
expectPushed(t, c, "PSubscribe(p1)", redis.Subscription{Kind: "psubscribe", Channel: "p1", Count: 3})
c.PSubscribe("p2")
expectPushed(t, c, "PSubscribe(p2)", redis.Subscription{Kind: "psubscribe", Channel: "p2", Count: 4})
c.PUnsubscribe()
expectPushed(t, c, "Punsubscribe(p1)", redis.Subscription{Kind: "punsubscribe", Channel: "p1", Count: 3})
expectPushed(t, c, "Punsubscribe()", redis.Subscription{Kind: "punsubscribe", Channel: "p2", Count: 2})
pc.Do("PUBLISH", "c1", "hello")
expectPushed(t, c, "PUBLISH c1 hello", redis.Message{Channel: "c1", Data: []byte("hello")})
}
func main() {
c, err := redis.Dial("tcp", ":6379")
if err != nil {
panic(err)
}
defer c.Close()
psc := redis.PubSubConn{Conn: c}
psc.Subscribe("example")
psc.PSubscribe("p*")
for {
switch n := psc.Receive().(type) {
case redis.Message:
fmt.Printf("Message: %s %s\n", n.Channel, n.Data)
case redis.PMessage:
fmt.Printf("PMessage: %s %s %s\n", n.Pattern, n.Channel, n.Data)
case redis.Subscription:
fmt.Printf("Subscription: %s %s %d\n", n.Kind, n.Channel, n.Count)
if n.Count == 0 {
return
}
case error:
fmt.Printf("error: %v\n", n)
return
}
}
}
func main3() {
//INIT OMIT
c, err := redis.Dial("tcp", ":6379")
if err != nil {
panic(err)
}
defer c.Close()
//set
c.Do("SET", "message1", "Hello World")
//get
world, err := redis.String(c.Do("GET", "message1"))
if err != nil {
fmt.Println("key not found")
}
fmt.Println(world)
//ENDINIT OMIT
psc := redis.PubSubConn{c}
psc.PSubscribe("bigbluebutton:to-bbb-apps:system")
for {
switch v := psc.Receive().(type) {
case redis.Message:
fmt.Printf("%s: message: %s\n", v.Channel, v.Data)
case redis.PMessage:
fmt.Printf("PMessage: %s %s %s\n", v.Pattern, v.Channel, v.Data)
case redis.Subscription:
fmt.Printf("%s: %s %d\n", v.Channel, v.Kind, v.Count)
case error:
fmt.Printf("error: %v\n", v)
}
}
}
// Monitor sentinel
func MonitorSentinel() {
redisConn := gRedisPool.Get()
defer redisConn.Close()
psc := redis.PubSubConn{redisConn}
psc.PSubscribe("*")
runflag := true
for runflag {
switch v := psc.Receive().(type) {
case redis.Message:
log.Infof("Type Message>>channel %s, message: %s", v.Channel, v.Data)
case redis.Subscription:
log.Infof("Type Subscribe>>channel %s, kind %s, count %d", v.Channel, v.Kind, v.Count)
gRecoveryChan <- RECOVERY_TYPE_REDIS
case error:
log.Error("MonitorSentinel ERROR")
runflag = false
// Should re psubscrebe
case redis.PMessage:
log.Infof("Type PMessage>>channel %s, pattern %s, data %s", v.Channel, v.Pattern, v.Data)
ParsePMessage(v)
default:
log.Warnf("Unkown Message Type of psubscribe")
}
}
}
func (rpsi *RedisPubSubInput) Run(ir pipeline.InputRunner, h pipeline.PluginHelper) error {
var (
dRunner pipeline.DecoderRunner
decoder pipeline.Decoder
pack *pipeline.PipelinePack
e error
ok bool
)
// Get the InputRunner's chan to receive empty PipelinePacks
packSupply := ir.InChan()
if rpsi.conf.DecoderName != "" {
if dRunner, ok = h.DecoderRunner(rpsi.conf.DecoderName, fmt.Sprintf("%s-%s", ir.Name(), rpsi.conf.DecoderName)); !ok {
return fmt.Errorf("Decoder not found: %s", rpsi.conf.DecoderName)
}
decoder = dRunner.Decoder()
}
//Connect to the channel
psc := redis.PubSubConn{Conn: rpsi.conn}
psc.PSubscribe(rpsi.conf.Channel)
for {
switch n := psc.Receive().(type) {
case redis.PMessage:
// Grab an empty PipelinePack from the InputRunner
pack = <-packSupply
pack.Message.SetType("redis_pub_sub")
pack.Message.SetLogger(n.Channel)
pack.Message.SetPayload(string(n.Data))
pack.Message.SetTimestamp(time.Now().UnixNano())
var packs []*pipeline.PipelinePack
if decoder == nil {
packs = []*pipeline.PipelinePack{pack}
} else {
packs, e = decoder.Decode(pack)
}
if packs != nil {
for _, p := range packs {
ir.Inject(p)
}
} else {
if e != nil {
ir.LogError(fmt.Errorf("Couldn't parse Redis message: %s", n.Data))
}
pack.Recycle(nil)
}
case redis.Subscription:
ir.LogMessage(fmt.Sprintf("Subscription: %s %s %d\n", n.Kind, n.Channel, n.Count))
if n.Count == 0 {
return errors.New("No channel to subscribe")
}
case error:
fmt.Printf("error: %v\n", n)
return n
}
}
return nil
}
func SubCommonMsg() error {
r := Redix[_SubCommonMsg]
RedixMu[_SubCommonMsg].Lock()
defer RedixMu[_SubCommonMsg].Unlock()
psc := redis.PubSubConn{Conn: r}
err := psc.PSubscribe(SubCommonMsgKey)
if err != nil {
return err
}
ch := make(chan redis.PMessage, 128)
go func() {
defer psc.Close()
for {
data := psc.Receive()
switch m := data.(type) {
case redis.PMessage:
ch <- m
case redis.Subscription:
if m.Count == 0 {
glog.Fatalf("Subscription: %s %s %d, %v\n", m.Kind, m.Channel, m.Count, m)
return
}
case error:
glog.Errorf("[modifypwd|redis] sub of error: %v\n", m)
return
}
}
}()
go HandleCommonMsg(ch)
return nil
}
// getKeyEventChannel returns a channel that sends events for key changes in
// Redis.
func (r *RedisRTC) getKeyEventChannel(channelOrPattern string, isPattern bool) (<-chan string, error) {
// Listen for changes on the queue continously.
psc := redis.PubSubConn{Conn: r.redisPool.Get()}
subscribe := func() error {
if isPattern {
return psc.PSubscribe(channelOrPattern)
} else {
return psc.Subscribe(channelOrPattern)
}
}
// Subscribe to the key events
if err := subscribe(); err != nil {
return nil, err
}
readyCh := make(chan bool)
ret := make(chan string)
go func() {
for {
Loop:
for {
switch v := psc.Receive().(type) {
case redis.PMessage:
ret <- string(v.Data)
case redis.Message:
ret <- string(v.Data)
case redis.Subscription:
if readyCh != nil {
readyCh <- true
close(readyCh)
}
case error:
glog.Errorf("Error waiting for key events: %s", v)
glog.Infof("Reconnecting.")
util.Close(psc)
break Loop
}
}
readyCh = nil
psc = redis.PubSubConn{Conn: r.redisPool.Get()}
if err := subscribe(); err != nil {
glog.Errorf("Error re-connecting: %s", err)
time.Sleep(time.Second)
}
}
}()
<-readyCh
return ret, nil
}
// NewReader creates a new redis channel reader
func NewReader(key string) (io.ReadCloser, error) {
if !NewRedisRegistrar().IsRegistered(key) {
return nil, ErrNotRegistered
}
psc := redis.PubSubConn{Conn: redisPool.Get()}
channel := channel(key)
psc.PSubscribe(channel.wildcardID())
rd := &reader{
channel: channel,
psc: psc,
mutex: &sync.Mutex{}}
return rd, nil
}
func myRedisSubscriptions() (<-chan RedisMsg, <-chan RedisMsg) {
// set up structures and channels to stream events out on
scoreUpdates := make(chan RedisMsg)
detailUpdates := make(chan RedisMsg)
// get a new redis connection from pool.
// since this is the first time the app tries to do something with redis,
// die if we can't get a valid connection, since something is probably
// configured wrong.
conn := redisPool.Get()
_, err := conn.Do("PING")
if err != nil {
log.Fatal("Could not connect to Redis, check your configuration.")
}
// subscribe to and handle streams
psc := redis.PubSubConn{conn}
psc.Subscribe("stream.score_updates")
psc.PSubscribe("stream.tweet_updates.*")
go func() {
for {
switch v := psc.Receive().(type) {
case redis.Message:
//fmt.Printf("%s: message: %s\n", v.Channel, v.Data)
scoreUpdates <- RedisMsg{v.Channel, v.Data} //string(v.Data)
case redis.PMessage:
//fmt.Printf("pattern: %s, channel: %s, data: %s\n", v.Pattern, v.Channel, v.Data)
//TODO: at some point we might need to also match the pattern here for kiosk mode
detailUpdates <- RedisMsg{v.Channel, v.Data}
case error:
log.Println("redis subscribe connection errored?@&*(#)akjd")
// probable cause is connection was closed, but force close just in case
conn.Close()
log.Println("attempting to get a new one in 5 seconds...")
time.Sleep(5 * time.Second)
conn = redisPool.Get()
}
}
}()
return scoreUpdates, detailUpdates
}
func TestPushed(t *testing.T) {
pc, err := redis.DialDefaultServer()
if err != nil {
t.Fatalf("error connection to database, %v", err)
}
defer pc.Close()
sc, err := redis.DialDefaultServer()
if err != nil {
t.Fatalf("error connection to database, %v", err)
}
defer sc.Close()
c := redis.PubSubConn{Conn: sc}
c.Subscribe("c1")
expectPushed(t, c, "Subscribe(c1)", redis.Subscription{Kind: "subscribe", Channel: "c1", Count: 1})
c.Subscribe("c2")
expectPushed(t, c, "Subscribe(c2)", redis.Subscription{Kind: "subscribe", Channel: "c2", Count: 2})
c.PSubscribe("p1")
expectPushed(t, c, "PSubscribe(p1)", redis.Subscription{Kind: "psubscribe", Channel: "p1", Count: 3})
c.PSubscribe("p2")
expectPushed(t, c, "PSubscribe(p2)", redis.Subscription{Kind: "psubscribe", Channel: "p2", Count: 4})
c.PUnsubscribe()
expectPushed(t, c, "Punsubscribe(p1)", redis.Subscription{Kind: "punsubscribe", Channel: "p1", Count: 3})
expectPushed(t, c, "Punsubscribe()", redis.Subscription{Kind: "punsubscribe", Channel: "p2", Count: 2})
pc.Do("PUBLISH", "c1", "hello")
expectPushed(t, c, "PUBLISH c1 hello", redis.Message{Channel: "c1", Data: []byte("hello")})
c.Ping("hello")
expectPushed(t, c, `Ping("hello")`, redis.Pong{Data: "hello"})
c.Conn.Send("PING")
c.Conn.Flush()
expectPushed(t, c, `Send("PING")`, redis.Pong{})
}
// Applications can receive pushed messages from one goroutine and manage subscriptions from another goroutine.
func ExamplePubSubConn() {
c, err := dial()
if err != nil {
panic(err)
}
defer c.Close()
var wg sync.WaitGroup
wg.Add(2)
psc := redis.PubSubConn{Conn: c}
// This goroutine receives and prints pushed notifications from the server.
// The goroutine exits when the connection is unsubscribed from all
// channels or there is an error.
go func() {
defer wg.Done()
for {
switch n := psc.Receive().(type) {
case redis.Message:
fmt.Printf("Message: %s %s\n", n.Channel, n.Data)
case redis.PMessage:
fmt.Printf("PMessage: %s %s %s\n", n.Pattern, n.Channel, n.Data)
case redis.Subscription:
fmt.Printf("Subscription: %s %s %d\n", n.Kind, n.Channel, n.Count)
if n.Count == 0 {
return
}
case error:
fmt.Printf("error: %v\n", n)
return
}
}
}()
// This goroutine manages subscriptions for the connection.
go func() {
defer wg.Done()
psc.Subscribe("example")
psc.PSubscribe("p*")
// The following function calls publish a message using another
// connection to the Redis server.
publish("example", "hello")
publish("example", "world")
publish("pexample", "foo")
publish("pexample", "bar")
// Unsubscribe from all connections. This will cause the receiving
// goroutine to exit.
psc.Unsubscribe()
psc.PUnsubscribe()
}()
wg.Wait()
// Output:
// Subscription: subscribe example 1
// Subscription: psubscribe p* 2
// Message: example hello
// Message: example world
// PMessage: p* pexample foo
// PMessage: p* pexample bar
// Subscription: unsubscribe example 1
// Subscription: punsubscribe p* 0
}
func main() {
flag.Parse()
redisPool := redis.NewPool(func() (redis.Conn, error) {
c, err := redis.Dial("tcp", *redisAddress)
if err != nil {
return nil, err
}
return c, err
}, *maxConnections)
defer redisPool.Close()
/*
c, err := redis.Dial("tcp", ":6379")
if err != nil {
panic(err)
}
defer c.Close()
*/
var wg sync.WaitGroup
wg.Add(2)
// psc := redis.PubSubConn{Conn: c}
psc := redis.PubSubConn{Conn: redisPool.Get()}
// This goroutine receives and prints pushed notifications from the server.
// The goroutine exits when the connection is unsubscribed from all
// channels or there is an error.
go func() {
defer wg.Done()
for {
switch n := psc.Receive().(type) {
case redis.Message:
fmt.Printf("Message: %s %s\n", n.Channel, n.Data)
case redis.PMessage:
fmt.Printf("PMessage: %s %s %s\n", n.Pattern, n.Channel, n.Data)
case redis.Subscription:
fmt.Printf("Subscription: %s %s %d\n", n.Kind, n.Channel, n.Count)
if n.Count == 0 {
return
}
case error:
fmt.Printf("error: %v\n", n)
return
}
}
}()
// This goroutine manages subscriptions for the connection.
go func() {
defer wg.Done()
psc.Subscribe("example")
psc.PSubscribe("p*")
psc.PSubscribe("bigbluebutton:to-bbb-apps:system")
// The following function calls publish a message using another
// connection to the Redis server.
publish("example", "hello")
publish("example", "world")
publish("pexample", "foo")
publish("pexample", "bar")
// Unsubscribe from all connections. This will cause the receiving
// goroutine to exit.
psc.Unsubscribe()
//psc.PUnsubscribe()
}()
wg.Wait()
// Output:
// Subscription: subscribe example 1
// Subscription: psubscribe p* 2
// Message: example hello
// Message: example world
// PMessage: p* pexample foo
// PMessage: p* pexample bar
// Subscription: unsubscribe example 1
// Subscription: punsubscribe p* 0
}
func main() {
debug := false //bool for now we can make it more verbose if needed
handleFlags(&debug)
//setup the pool for the connections
var pool = &redis.Pool{
MaxIdle: common.REDIS_MAX_POOL_IDLE,
IdleTimeout: 240 * time.Second,
Dial: func() (redis.Conn, error) {
c, err := redis.Dial("tcp", common.REDIS_ADDRESS+":"+common.REDIS_PORT)
if err != nil {
return nil, err
}
return c, err
}, //end dial
} //end pool
common.LogEvent(debug, "Created new Redis Pool.")
zmqCTX, err := zmq.NewContext()
if err != nil {
panic(err)
}
defer zmqCTX.Close()
common.LogEvent(debug, "Created new ZeroMQ Context")
trackerZMQPUB, err := zmqCTX.Socket(zmq.Pub)
if err != nil {
panic(err)
}
defer trackerZMQPUB.Close()
common.LogEvent(debug, "Created new ZeroMQ Pub Socket.")
trackerZMQREP, err := zmqCTX.Socket(zmq.Rep)
if err != nil {
panic(err)
}
defer trackerZMQREP.Close()
common.LogEvent(debug, "Created new ZeroMQ Rep Socket.")
//bind the publisher socket to the pub port for zmq
if err = trackerZMQPUB.Bind(common.ZMQ_SOCKET_PROTOCOL + common.ZMQ_TRACKER_PUB_IP_ADDRESS + ":" + common.ZMQ_TRACKER_PUB_PORT); err != nil {
panic(err)
}
//bind the reply socket to the rep port for zmq
if err = trackerZMQREP.Bind(common.ZMQ_SOCKET_PROTOCOL + common.ZMQ_TRACKER_REP_IP_ADDRESS + ":" + common.ZMQ_TRACKER_REP_PORT); err != nil {
panic(err)
}
fmt.Println(pool.ActiveCount())
conn := pool.Get()
defer conn.Close()
common.LogEvent(debug, "Created a new pool connection")
psc := redis.PubSubConn{conn} //setup a PubSubConn passing our previous connection to it
psc.PSubscribe(common.REDIS_SUB_STRING) //subscribe to the ASMS::* string, which is everything
fmt.Println(pool.ActiveCount())
//channelRegistry := make(map[string]chan string) //create a channelRegistry to track the channels being created below for each spawned goroutine
go handleReply(pool, trackerZMQREP) //spawn a go routine for handleReply this takes care of handling responding to server loads
common.LogEvent(debug, "Spawned new goprocess for handleReply.")
for {
common.LogEvent(debug, "Receieved a new redis data item.")
switch v := psc.Receive().(type) {
case redis.PMessage:
common.LogEvent(debug, "Redis data item is of type Message.")
channelSplit := strings.Split(v.Channel, common.ACCOUNT_IDS_SEP) //take the channel string contained in the reply struct, split it.
switch channelSplit[1] { // the key is laid out as ASMS::<Message>/<Receipt>/<UpdateDevice>::....
case "Message":
go handleMessage(pool, trackerZMQPUB, v.Data)
common.LogEvent(debug, "Spawned new goprocess for handleMessage.")
case "Receipt":
go handleReceipt(pool, trackerZMQPUB, v.Data)
common.LogEvent(debug, "Spawned new goprocess for handleReceipt.")
case "UpdateDevice":
go handleUpdateDevice(pool, trackerZMQPUB, v.Data)
common.LogEvent(debug, "Spawned new goprocess for handleUpdateDevice.")
default:
fmt.Println("tracker.go: Recieved an unexpected request.")
} //end switch channelSplit[1]
case redis.Subscription:
//dont know what to say!!!
fmt.Println("I guess we will always get here on start,since we recieve back from the redis server?")
case error:
panic(v)
} //end switch v:=
} //end for
} //end main
