start distributed hochwasser
only RPC plumbing for now. naming: https://en.wikipedia.org/wiki/Nine_Daughters_of_%C3%86gir_and_R%C3%A1n
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parent
3f0acd9694
commit
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10
main.go
10
main.go
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@ -10,6 +10,7 @@ import (
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"time"
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"github.com/SpeckiJ/Hochwasser/pixelflut"
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"github.com/SpeckiJ/Hochwasser/rpc"
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)
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var err error
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@ -22,6 +23,8 @@ var address = flag.String("host", "127.0.0.1:1337", "Server address")
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var runtime = flag.String("runtime", "60s", "exit after timeout")
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var shuffle = flag.Bool("shuffle", false, "pixel send ordering")
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var fetchImgPath = flag.String("fetch-image", "", "path to save the fetched pixel state to")
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var rán = flag.String("rán", "", "enable rpc server to distribute jobs, listening on the given address/port")
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var hevring = flag.String("hevring", "", "connect to rán rpc server at given address")
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func main() {
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flag.Parse()
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@ -47,6 +50,13 @@ func main() {
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defer pprof.StopCPUProfile()
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}
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if *rán != "" { // @fixme: should validate proper address?
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rpc.StartRán(*rán)
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}
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if *hevring != "" { // @fixme: should validate proper address?
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rpc.ConnectHevring(*hevring)
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}
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offset := image.Pt(*image_offsetx, *image_offsety)
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img := readImage(*image_path)
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@ -0,0 +1,28 @@
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package rpc
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import (
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"fmt"
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"log"
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"net/rpc"
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)
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func ConnectHevring(ránAddress string) {
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fmt.Printf("[hevring] connecting to %s\n", ránAddress)
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client, err := rpc.Dial("tcp", ránAddress)
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if err != nil {
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log.Fatal(err)
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}
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job := RánJob{}
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err = client.Call("Rán.Hello", RánHelloReq{}, &job)
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if err != nil {
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log.Fatal(err)
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}
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if (job == RánJob{}) {
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fmt.Printf("[hevring] Rán has no job for us. :(\n")
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} else {
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fmt.Printf("[hevring] Rán gave us /w o r k/! %v\n", job)
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}
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}
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@ -0,0 +1,56 @@
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package rpc
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import (
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"fmt"
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"image"
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"log"
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"net"
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"net/rpc"
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)
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func StartRán(address string) {
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rán := new(Rán)
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rpc.Register(rán)
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l, err := net.Listen("tcp", address)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("[rán] rpc server listening on %s\n", l.Addr())
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go func() {
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for {
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conn, err := l.Accept()
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if err != nil {
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log.Fatal(err)
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}
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rán.clientAddresses = append(rán.clientAddresses, conn.RemoteAddr())
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fmt.Printf("[rán] client connected (%v)\n", rán.clientAddresses)
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// @incomplete: detect client disconnect, update clients.
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go rpc.ServeConn(conn)
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// @bug: second connection does not send Hello..?!
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}
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}()
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}
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type Rán struct {
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clientAddresses []net.Addr
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}
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type RánHelloReq struct{}
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type RánJob struct {
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Address string
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MaxConns int
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Img image.Image
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Bounds image.Rectangle
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Shuffle bool
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}
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func (z *Rán) Hello(args RánHelloReq, reply *RánJob) error {
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fmt.Printf("[rán] a client said hello!\n")
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reply = nil
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return nil
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}
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