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package agent
import (
"fmt"
"os"
"os/exec"
"os/signal"
"syscall"
"github.com/Sirupsen/logrus"
"github.com/codegangsta/cli"
"github.com/iotbzh/xds-agent/lib/syncthing"
"github.com/iotbzh/xds-agent/lib/xdsconfig"
"github.com/iotbzh/xds-agent/lib/webserver"
)
// Context holds the Agent context structure
type Context struct {
ProgName string
Config *xdsconfig.Config
Log *logrus.Logger
SThg *st.SyncThing
SThgCmd *exec.Cmd
SThgInotCmd *exec.Cmd
WWWServer *webserver.ServerService
Exit chan os.Signal
}
// NewAgent Create a new instance of Agent
func NewAgent(cliCtx *cli.Context) *Context {
var err error
// Set logger level and formatter
log := cliCtx.App.Metadata["logger"].(*logrus.Logger)
logLevel := cliCtx.GlobalString("log")
if logLevel == "" {
logLevel = "error" // FIXME get from Config DefaultLogLevel
}
if log.Level, err = logrus.ParseLevel(logLevel); err != nil {
fmt.Printf("Invalid log level : \"%v\"\n", logLevel)
os.Exit(1)
}
log.Formatter = &logrus.TextFormatter{}
// Define default configuration
ctx := Context{
ProgName: cliCtx.App.Name,
Log: log,
Exit: make(chan os.Signal, 1),
}
// register handler on SIGTERM / exit
signal.Notify(ctx.Exit, os.Interrupt, syscall.SIGTERM)
go handlerSigTerm(&ctx)
return &ctx
}
// Handle exit and properly stop/close all stuff
func handlerSigTerm(ctx *Context) {
<-ctx.Exit
if ctx.SThg != nil {
ctx.Log.Infof("Stoping Syncthing... (PID %d)",
ctx.SThgCmd.Process.Pid)
ctx.Log.Infof("Stoping Syncthing-inotify... (PID %d)",
ctx.SThgInotCmd.Process.Pid)
ctx.SThg.Stop()
ctx.SThg.StopInotify()
}
if ctx.WWWServer != nil {
ctx.Log.Infof("Stoping Web server...")
ctx.WWWServer.Stop()
}
os.Exit(1)
}
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