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//
// rhctl
//
// Copyright (C) 2009-2016 Christian Pointner <equinox@helsinki.at>
//
// This file is part of rhctl.
//
// rhctl is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// rhctl is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with rhctl. If not, see <http://www.gnu.org/licenses/>.
//
package main
import (
"fmt"
"github.com/btittelbach/pubsub"
)
type CommandType uint8
const (
CmdStatus CommandType = iota
CmdServer
CmdSwitch
)
func (c CommandType) String() string {
switch c {
case CmdStatus:
return "status"
case CmdServer:
return "server"
case CmdSwitch:
return "switch"
}
return "unknown"
}
type Command struct {
Type CommandType
Args []string
Response chan<- interface{}
}
type SwitchControl struct {
sw *AudioSwitch
servers []*PlayoutServer
Updates *pubsub.PubSub
Commands chan *Command
}
func (ctrl *SwitchControl) handleCommand(cmd *Command) {
switch cmd.Type {
case CmdStatus:
case CmdServer:
case CmdSwitch:
if len(cmd.Args) == 0 {
rhl.Printf("SwitchCTRL: ignoring empty raw switch command")
return
}
c, err := NewSwitchCommandFromStrings(cmd.Args[0], cmd.Args[1:]...)
if err != nil {
cmd.Response <- fmt.Errorf("switch command syntax error: %s", err.Error())
return
}
c.Response = cmd.Response
ctrl.sw.Commands <- c
}
}
func handleServer(in <-chan ServerStatus, out chan<- ServerStatus) {
for {
update := <-in
out <- update
}
}
func (ctrl *SwitchControl) Run() {
rhdl.Printf("SwitchCTRL: handler running...")
serverUpdates := make(chan ServerStatus, 8)
for _, srv := range ctrl.servers {
go handleServer(srv.Updates, serverUpdates)
}
for {
select {
case update := <-ctrl.sw.Updates:
rhdl.Printf("got update from switch: %+v", update)
for _, srv := range ctrl.servers {
srv.SwitchUpdates <- update
}
ctrl.Updates.Pub(update, "switch:"+update.Type.String())
case status := <-serverUpdates:
rhdl.Printf("got server status update: %+v", status)
ctrl.Updates.Pub(status, "server:status")
// TODO: recalculate overall status and send out commands to switch
case cmd := <-ctrl.Commands:
ctrl.handleCommand(cmd)
}
}
}
func SwitchControlInit(conf *Config, sw *AudioSwitch, servers []*PlayoutServer) (ctrl *SwitchControl) {
ctrl = &SwitchControl{}
ctrl.sw = sw
ctrl.servers = servers
ctrl.Updates = pubsub.NewNonBlocking(32)
ctrl.Commands = make(chan *Command, 8)
return
}
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