Add info command

cluster/cluster.go

@@ -132,6 +132,9 @@ func (cluster *Cluster) Exec(c redis.Connection, cmdLine [][]byte) (result redis
 		}
 	}()
 	cmdName := strings.ToLower(string(cmdLine[0]))
+	if cmdName == "info" {
+		return database2.Info(c, cmdLine)
+	}
 	if cmdName == "auth" {
 		return database2.Auth(c, cmdLine[1:])
 	}

cluster/router.go

@@ -8,6 +8,7 @@ type CmdLine = [][]byte
 func makeRouter() map[string]CmdFunc {
 	routerMap := make(map[string]CmdFunc)
 	routerMap["ping"] = ping
+	routerMap["info"] = info
 
 	routerMap["prepare"] = execPrepare
 	routerMap["commit"] = execCommit

cluster/utils.go

@@ -11,6 +11,10 @@ func ping(cluster *Cluster, c redis.Connection, cmdLine CmdLine) redis.Reply {
 	return cluster.db.Exec(c, cmdLine)
 }
 
+func info(cluster *Cluster, c redis.Connection, cmdLine CmdLine) redis.Reply {
+	return cluster.db.Exec(c, cmdLine)
+}
+
 /*----- utils -------*/
 
 func makeArgs(cmd string, args ...string) [][]byte {

config/config.go

@@ -5,6 +5,7 @@ import (
 	"github.com/hdt3213/godis/lib/utils"
 	"io"
 	"os"
+	"path/filepath"
 	"reflect"
 	"strconv"
 	"strings"
@@ -136,4 +137,9 @@ func SetupConfig(configFilename string) {
 	defer file.Close()
 	Properties = parse(file)
 	Properties.RunID = utils.RandString(40)
+	configFilePath, err := filepath.Abs(configFilename)
+	if err != nil {
+		return
+	}
+	Properties.CfPath = configFilePath
 }

database/systemcmd.go

@@ -5,6 +5,7 @@ import (
 	"github.com/hdt3213/godis/config"
 	"github.com/hdt3213/godis/interface/redis"
 	"github.com/hdt3213/godis/redis/protocol"
+	"github.com/hdt3213/godis/tcp"
 	"os"
 	"runtime"
 	"strings"
@@ -25,21 +26,28 @@ func Ping(c redis.Connection, args [][]byte) redis.Reply {
 // Info the information of the godis server returned by the INFO command
 func Info(c redis.Connection, args [][]byte) redis.Reply {
 	if len(args) == 1 {
-		return protocol.MakeBulkReply(GenGodisInfoString())
+		infoCommandList := [...]string{"server", "client", "cluster"}
+		var allSection []byte
+		for _, s := range infoCommandList {
+			allSection = append(allSection, GenGodisInfoString(s)...)
+		}
+
+		return protocol.MakeBulkReply(allSection)
 	} else if len(args) == 2 {
 		section := strings.ToLower(string(args[1]))
 		switch section {
 		case "server":
-			reply := GenGodisInfoString()
+			reply := GenGodisInfoString("server")
 			return protocol.MakeBulkReply(reply)
+		case "client":
+			return protocol.MakeBulkReply(GenGodisInfoString("client"))
+		case "cluster":
+			return protocol.MakeBulkReply(GenGodisInfoString("cluster"))
 		default:
 			return protocol.MakeNullBulkReply()
 		}
-	} else {
-		return protocol.MakeErrReply("ERR wrong number of arguments for 'info' command")
 	}
-
-	return &protocol.NullBulkReply{}
+	return protocol.MakeErrReply("ERR wrong number of arguments for 'info' command")
 }
 
 // Auth validate client's password
@@ -65,8 +73,10 @@ func isAuthenticated(c redis.Connection) bool {
 	return c.GetPassword() == config.Properties.RequirePass
 }
 
-func GenGodisInfoString() []byte {
+func GenGodisInfoString(section string) []byte {
 	startUpTimeFromNow := getGodisRunningTime()
+	switch section {
+	case "server":
 		s := fmt.Sprintf("# Server\r\n"+
 			"godis_version:%s\r\n"+
 			//"godis_git_sha1:%s\r\n"+
@@ -103,6 +113,35 @@ func GenGodisInfoString() []byte {
 			//TODO,
 			config.Properties.CfPath)
 		return []byte(s)
+	case "client":
+		s := fmt.Sprintf("# Clients\r\n"+
+			"connected_clients:%d\r\n",
+			//"client_recent_max_input_buffer:%d\r\n"+
+			//"client_recent_max_output_buffer:%d\r\n"+
+			//"blocked_clients:%d\n",
+			tcp.ClientCounter,
+			//TODO,
+			//TODO,
+			//TODO,
+		)
+		return []byte(s)
+	case "cluster":
+		if getGodisRunningMode() == config.ClusterMode {
+			s := fmt.Sprintf("# Cluster\r\n"+
+				"cluster_enabled:%s\r\n",
+				"1",
+			)
+			return []byte(s)
+		} else {
+			s := fmt.Sprintf("# Cluster\r\n"+
+				"cluster_enabled:%s\r\n",
+				"0",
+			)
+			return []byte(s)
+		}
+	}
+
+	return []byte("")
 }
 
 // getGodisRunningMode return godis running mode

database/systemcmd_test.go

@@ -46,6 +46,10 @@ func TestInfo(t *testing.T) {
 	asserts.AssertNotError(t, ret)
 	ret = testServer.Exec(c, utils.ToCmdLine("INFO", "server"))
 	asserts.AssertNotError(t, ret)
+	ret = testServer.Exec(c, utils.ToCmdLine("INFO", "client"))
+	asserts.AssertNotError(t, ret)
+	ret = testServer.Exec(c, utils.ToCmdLine("INFO", "cluster"))
+	asserts.AssertNotError(t, ret)
 	ret = testServer.Exec(c, utils.ToCmdLine("iNFO", "SeRvEr"))
 	asserts.AssertNotError(t, ret)
 	ret = testServer.Exec(c, utils.ToCmdLine("iNFO", "abc", "bde"))

tcp/server.go

@@ -25,6 +25,9 @@ type Config struct {
 	Timeout    time.Duration `yaml:"timeout"`
 }
 
+// ClientCounter Record the number of clients in the current Godis server
+var ClientCounter int
+
 // ListenAndServeWithSignal binds port and handle requests, blocking until receive stop signal
 func ListenAndServeWithSignal(cfg *Config, handler tcp.Handler) error {
 	closeChan := make(chan struct{})
@@ -75,10 +78,12 @@ func ListenAndServe(listener net.Listener, handler tcp.Handler, closeChan <-chan
 		}
 		// handle
 		logger.Info("accept link")
+		ClientCounter++
 		waitDone.Add(1)
 		go func() {
 			defer func() {
 				waitDone.Done()
+				ClientCounter--
 			}()
 			handler.Handle(ctx, conn)
 		}()