102 lines
2.0 KiB
Go
102 lines
2.0 KiB
Go
package rpc
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import (
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"fmt"
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"log"
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"net"
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"net/rpc"
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"sync"
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"time"
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"github.com/SpeckiJ/Hochwasser/pixelflut"
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)
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func ConnectHevring(ránAddress string, stop chan bool, wg *sync.WaitGroup) {
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h := new(Hevring)
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rpc.Register(h)
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fmt.Printf("[hevring] greeting Rán at %s\n", ránAddress)
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conn, err := net.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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go rpc.ServeConn(conn)
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fmt.Printf("[hevring] awaiting task from Rán\n")
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h.quit = stop
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h.wg = wg
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h.wg.Add(1)
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go func() {
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<-h.quit
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h.quit = nil
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if h.taskQuit != nil {
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close(h.taskQuit)
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h.taskQuit = nil
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}
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h.wg.Done()
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}()
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}
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type Hevring struct {
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task pixelflut.FlutTask
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taskQuit chan bool
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quit chan bool
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wg *sync.WaitGroup
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}
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type FlutAck struct{ Ok bool }
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type FlutStatus struct {
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*pixelflut.Performance
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Ok bool
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Fluting bool
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}
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func (h *Hevring) Flut(task pixelflut.FlutTask, reply *FlutAck) error {
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// stop old task if new task is received
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if h.taskQuit != nil {
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close(h.taskQuit)
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}
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fmt.Printf("[hevring] Rán gave us work!\n%v\n", task)
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h.task = task
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h.taskQuit = make(chan bool)
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go pixelflut.Flut(task, h.taskQuit, nil)
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reply.Ok = true
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return nil
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}
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func (h *Hevring) Status(metrics bool, reply *FlutStatus) error {
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pixelflut.PerformanceReporter.Enabled = metrics
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reply.Performance = pixelflut.PerformanceReporter
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reply.Ok = true
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reply.Fluting = h.taskQuit != nil
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return nil
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}
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func (h *Hevring) Stop(x int, reply *FlutAck) error {
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if h.taskQuit != nil {
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fmt.Println("[hevring] stopping task")
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h.task = pixelflut.FlutTask{}
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close(h.taskQuit)
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h.taskQuit = nil
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reply.Ok = true
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}
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return nil
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}
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func (h *Hevring) Die(x int, reply *FlutAck) error {
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// @robustness: waiting for reply to be sent via timeout
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// @incomplete: should try to reconnect for a bit first
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go func() {
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fmt.Println("[hevring] Rán disconnected, stopping")
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time.Sleep(100 * time.Millisecond)
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if h.quit != nil {
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close(h.quit)
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}
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}()
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reply.Ok = true
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return nil
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}
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