From 354e14e6c093c661abb29fd28403b3c19cff5514 Mon Sep 17 00:00:00 2001
From: siddontang <siddontang@gmail.com>
Date: Sun, 27 Dec 2015 12:49:29 +0800
Subject: [PATCH] support SetLevelByName

---
 log/log.go      | 25 +++++++++++++++++++++++++
 log/log_test.go |  5 +++++
 2 files changed, 30 insertions(+)

diff --git a/log/log.go b/log/log.go
index 74cd76a..f2e5ef2 100644
--- a/log/log.go
+++ b/log/log.go
@@ -5,6 +5,7 @@ import (
 	"os"
 	"runtime"
 	"strconv"
+	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -155,6 +156,25 @@ func (l *Logger) SetLevel(level int) {
 	l.level.Set(level)
 }
 
+// name can be in ["trace", "debug", "info", "warn", "error", "fatal"]
+func (l *Logger) SetLevelByName(name string) {
+	name = strings.ToLower(name)
+	switch name {
+	case "trace":
+		l.SetLevel(LevelTrace)
+	case "debug":
+		l.SetLevel(LevelDebug)
+	case "info":
+		l.SetLevel(LevelInfo)
+	case "warn":
+		l.SetLevel(LevelWarn)
+	case "error":
+		l.SetLevel(LevelError)
+	case "fatal":
+		l.SetLevel(LevelFatal)
+	}
+}
+
 func (l *Logger) SetHandler(h Handler) {
 	if l.closed.Get() == 1 {
 		return
@@ -288,6 +308,11 @@ func SetLevel(level int) {
 	std.SetLevel(level)
 }
 
+// name can be in ["trace", "debug", "info", "warn", "error", "fatal"]
+func SetLevelByName(name string) {
+	std.SetLevelByName(name)
+}
+
 func SetHandler(h Handler) {
 	std.SetHandler(h)
 }
diff --git a/log/log_test.go b/log/log_test.go
index 2e29b31..bc5ffa1 100644
--- a/log/log_test.go
+++ b/log/log_test.go
@@ -23,6 +23,11 @@ func TestStdStreamLog(t *testing.T) {
 	SetLevel(LevelError)
 
 	Infof("%s %d", "Hello", 123)
+
+	SetLevelByName("info")
+
+	Infof("%s %d", "Hello", 123)
+
 	Fatalf("%s %d", "Hello", 123)
 }