changed server to use channels instead of cond for wakeup, removed config hashing, added config path to config struct

config/config.go

@@ -10,13 +10,16 @@ type Config struct {
 	Groups   map[string]*Group
 	Alarms   map[string]alarm.Alarm
 	Interval time.Duration
-	Hash     string
+	Listen   string
+	Path     string
 }
 
 func NewConfig() *Config {
 	return &Config{
 		// Default check interval, 30 seconds
 		Interval: time.Second * 30,
+		// Default listen address
+		Listen: "127.0.0.1:8282",
 	}
 }
 

config/parser.go

@@ -1,7 +1,6 @@
 package config
 
 import (
-	"encoding/hex"
 	"fmt"
 	"git.binarythought.com/cdramey/alrm/alarm"
 	"git.binarythought.com/cdramey/alrm/check"
@@ -30,6 +29,7 @@ type Parser struct {
 
 func (p *Parser) Parse(fn string) (*Config, error) {
 	config := NewConfig()
+	config.Path = fn
 	tok, err := NewTokenizer(fn)
 	if err != nil {
 		return nil, err
@@ -70,6 +70,8 @@ func (p *Parser) Parse(fn string) (*Config, error) {
 						fn, tok.Line(), value,
 					)
 				}
+			case "listen":
+				config.Listen = value
 			default:
 				return nil, fmt.Errorf("unknown key for set in %s, line %d: \"%s\"",
 					fn, tok.Line(), tk,
@@ -200,7 +202,6 @@ func (p *Parser) Parse(fn string) (*Config, error) {
 	if err := tok.Err(); err != nil {
 		return nil, err
 	}
-	config.Hash = hex.EncodeToString(tok.Hash.Sum(nil))
 	return config, nil
 }
 

config/tokenizer.go

@@ -2,9 +2,7 @@ package config
 
 import (
 	"bufio"
-	"crypto/sha256"
 	"fmt"
-	"hash"
 	"io"
 	"os"
 	"strings"
@@ -19,7 +17,6 @@ const (
 )
 
 type Tokenizer struct {
-	Hash    hash.Hash
 	curline int
 	repline int
 	file    *os.File
@@ -36,7 +33,6 @@ func NewTokenizer(fn string) (*Tokenizer, error) {
 		return nil, err
 	}
 
-	tk.Hash = sha256.New()
 	tk.reader = bufio.NewReader(tk.file)
 	return tk, nil
 }
@@ -62,7 +58,6 @@ func (t *Tokenizer) Scan() bool {
 			t.err = fmt.Errorf("invalid utf-8 encoding on line %s", t.repline)
 			break
 		}
-		t.Hash.Write([]byte(string(r)))
 
 		switch state {
 		case TK_NONE:

main.go

@@ -5,26 +5,27 @@ import (
 	"flag"
 	"fmt"
 	"git.binarythought.com/cdramey/alrm/config"
+	"git.binarythought.com/cdramey/alrm/server"
 	"os"
 	"strings"
 )
 
 func main() {
-	cfgPath := flag.String("c", "", "path to configuration file")
+	cfgpath := flag.String("c", "", "path to configuration file")
 	debuglvl := flag.Int("d", 0, "debug level")
 
 	flag.Usage = printUsage
 	flag.Parse()
 
-	if *cfgPath == "" {
+	if *cfgpath == "" {
 		searchpaths := []string{"/etc/alrmrc", "./alrmrc"}
 		for _, sp := range searchpaths {
 			if _, err := os.Stat(sp); err == nil {
-				*cfgPath = sp
+				*cfgpath = sp
 				break
 			}
 		}
-		if *cfgPath == "" {
+		if *cfgpath == "" {
 			fmt.Fprintf(os.Stderr, "cannot find configuration\n")
 			os.Exit(1)
 		}
@@ -34,10 +35,10 @@ func main() {
 	switch command {
 	case "config":
 		if *debuglvl > 0 {
-			fmt.Printf("checking config %s .. \n", *cfgPath)
+			fmt.Printf("checking config %s .. \n", *cfgpath)
 		}
 
-		cfg, err := config.ReadConfig(*cfgPath, *debuglvl)
+		cfg, err := config.ReadConfig(*cfgpath, *debuglvl)
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "%s\n", err.Error())
 			os.Exit(1)
@@ -61,7 +62,7 @@ func main() {
 			os.Exit(1)
 		}
 
-		cfg, err := config.ReadConfig(*cfgPath, 0)
+		cfg, err := config.ReadConfig(*cfgpath, 0)
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "%s\n", err.Error())
 			os.Exit(1)
@@ -90,7 +91,7 @@ func main() {
 			os.Exit(1)
 		}
 
-		cfg, err := config.ReadConfig(*cfgPath, 0)
+		cfg, err := config.ReadConfig(*cfgpath, 0)
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "%s\n", err.Error())
 			os.Exit(1)
@@ -110,17 +111,14 @@ func main() {
 		fmt.Printf("check successful\n")
 
 	case "server":
-		cfg, err := config.ReadConfig(*cfgPath, *debuglvl)
+		cfg, err := config.ReadConfig(*cfgpath, *debuglvl)
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "%s\n", err.Error())
 			os.Exit(1)
 		}
 
-		err = startServer(cfg, *debuglvl)
+		srv := server.NewServer(cfg, *debuglvl)
-		if err != nil {
+		srv.Start()
-			fmt.Fprintf(os.Stderr, "%s\n", err.Error())
-			os.Exit(1)
-		}
 
 	case "help", "":
 		printUsage()

server.go

@@ -1,51 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"git.binarythought.com/cdramey/alrm/config"
-	"sync"
-	"time"
-)
-
-func startServer(cfg *config.Config, debuglvl int) error {
-	c := sync.NewCond(&sync.Mutex{})
-	for _, g := range cfg.Groups {
-		go worker(g, c, debuglvl)
-	}
-
-	t := time.NewTicker(cfg.Interval)
-	defer t.Stop()
-	for {
-		select {
-		case r := <-t.C:
-			if debuglvl > 0 {
-				fmt.Printf("Interval check at %s\n", r)
-			}
-			c.Broadcast()
-		}
-	}
-	return nil
-}
-
-func worker(g *config.Group, c *sync.Cond, debuglvl int) {
-	for {
-		if debuglvl > 2 {
-			fmt.Printf("%s goroutine waiting.. \n", g.Name)
-		}
-		c.L.Lock()
-		c.Wait()
-		c.L.Unlock()
-		if debuglvl > 2 {
-			fmt.Printf("%s goroutine wake.. \n", g.Name)
-		}
-
-		for _, h := range g.Hosts {
-			for _, c := range h.Checks {
-				err := c.Check(debuglvl)
-				if err != nil {
-					fmt.Printf("Check error: %s\n", err)
-				}
-			}
-		}
-	}
-}

server/server.go

@@ -0,0 +1,47 @@
+package server
+
+import (
+	"fmt"
+	"git.binarythought.com/cdramey/alrm/config"
+	"time"
+)
+
+type Server struct {
+	workers  []*worker
+	cfg      *config.Config
+	debuglvl int
+	httpsrv  http.Server
+}
+
+func (srv *Server) Start() {
+	for _, w := range srv.workers {
+		go w.start(srv.debuglvl)
+	}
+
+	t := time.NewTicker(srv.cfg.Interval)
+	defer t.Stop()
+	for {
+		select {
+		case r := <-t.C:
+			if srv.debuglvl > 0 {
+				fmt.Printf("interval check at %s\n", r)
+			}
+
+			for _, w := range srv.workers {
+				select {
+				case w.wake <- true:
+				default:
+				}
+			}
+		}
+	}
+}
+
+func NewServer(cfg *config.Config, debuglvl int) *Server {
+	srv := &Server{cfg: cfg, debuglvl: debuglvl}
+	for _, g := range cfg.Groups {
+		w := &worker{group: g, wake: make(chan bool)}
+		srv.workers = append(srv.workers, w)
+	}
+	return srv
+}

server/worker.go

@@ -0,0 +1,32 @@
+package server
+
+import (
+	"fmt"
+	"git.binarythought.com/cdramey/alrm/config"
+)
+
+type worker struct {
+	wake  chan bool
+	group *config.Group
+}
+
+func (w *worker) start(debuglvl int) {
+	for {
+		if debuglvl > 2 {
+			fmt.Printf("%s worker waiting.. \n", w.group.Name)
+		}
+		<-w.wake
+		if debuglvl > 2 {
+			fmt.Printf("%s worker wake.. \n", w.group.Name)
+		}
+
+		for _, h := range w.group.Hosts {
+			for _, c := range h.Checks {
+				err := c.Check(debuglvl)
+				if err != nil {
+					fmt.Printf("check error: %s\n", err)
+				}
+			}
+		}
+	}
+}