func main() {
// Connect to the local bosswave router
cl, err := bw.Connect("localhost:28589")
if err != nil {
bail(err)
}
// Tell the local router who we are. Remember that in BW,
// your identity is key
us, err := cl.SetEntityFile("balingwire.key")
if err != nil {
bail(err)
}
// As we are going to do a bunch of publishes on the same
// URI, it is faster to calculate the permissions once, and reuse
// them instead of doing it on every message (using AutoChain)
uri := "castle.bw2.io/hamilton/+/accel"
// This says "find me any chain that gives me Publish and Consume on
// the given url"
pac, e := cl.BuildAnyChain(uri, "PC", us)
if pac == nil {
fmt.Println("Could not get permissions: ", e)
os.Exit(1)
}
// Note that if permissions exist, but your local router does not
// know about them, the above might fail. Simply let your local
// router know about them by executing
// bw2 bc --uri <uri> --to <our vk> --permissions "PC" --router <RTR>
// where RTR is a router that has the missing dots to build a chain
// for example castle.bw2.io
// You can refer to a router by its key or by DNS name that will be
// resolved to a key.
fmt.Println("using pac: ", pac.Hash)
msgchan := listenForHamiltonPackets()
go genDemoPackets(msgchan)
for {
m := <-msgchan
// m is a compliant hamilton accelerometer PO
err = cl.Publish(&bw.PublishParams{
// The URI we want to publish to
URI: "castle.bw2.io/hamilton/" + m.serial + "/accel",
// The access chain that gives us permissions
PrimaryAccessChain: pac.Hash,
// This says include the full PAC in the message
// It might soon become the default
ElaboratePAC: bw.ElaborateFull,
PayloadObjects: m.POs,
})
if err != nil {
fmt.Println("Error publishing: ", err.Error())
} else {
fmt.Println("Published ok")
}
}
}
func main() {
var err error
var chandle codec.Handle = new(codec.MsgpackHandle)
var cl *bw.BW2Client
cl, err = bw.Connect("localhost:28589")
exitOnError(err, "Could not connect")
var vk string
vk, err = cl.SetEntityFile("chairb.key")
exitOnError(err, "Could not use entity")
var dchain *bw.SimpleChain
dchain, err = cl.BuildAnyChain(RAWDATAURI, "CP", vk)
exitOnError(err, "Could not build DOT chain")
var msgchan chan *bw.SimpleMessage
msgchan, err = cl.Subscribe(&bw.SubscribeParams{
URI: RAWDATAURI,
PrimaryAccessChain: dchain.Hash,
ElaboratePAC: "full",
})
var msg *bw.SimpleMessage
var cid string
var cm ChairMessage
for msg = range msgchan {
cid, cm, err = parseIncomingMessage(msg, chandle)
if err == nil {
fmt.Printf("Received message for chair %v: %v\n", cid, cm)
} else {
fmt.Printf("Could not handle incoming message: %v\n", err)
}
}
}