Update README.md

README.md

@@ -1,18 +1,22 @@
 go-log
 ================
 
-[![Go Report Card](https://goreportcard.com/badge/github.com/subchen/go-log)](https://goreportcard.com/report/github.com/subchen/go-log)
 [![GoDoc](https://godoc.org/github.com/subchen/go-log?status.svg)](https://godoc.org/github.com/subchen/go-log)
+[![Build Status](https://travis-ci.org/subchen/go-log.svg?branch=master)](https://travis-ci.org/subchen/go-log)
+[![Coverage Status](https://coveralls.io/repos/github/subchen/go-log/badge.svg?branch=master)](https://coveralls.io/github/subchen/go-log?branch=master)
+[![Go Report Card](https://goreportcard.com/badge/github.com/subchen/go-log)](https://goreportcard.com/report/github.com/subchen/go-log)
+[![License](http://img.shields.io/badge/License-Apache_2-red.svg?style=flat)](http://www.apache.org/licenses/LICENSE-2.0)
 
 Logging package similar to log4j for the Golang.
 
-* Support dynamic log level
-* Daily log file output
-* Fixed size log file ouput
-* Output console and file all at once
-* Output full stack
-* Output goroutinue id to console
-* Output colorized level to console
+- Support dynamic log level
+- Support customized formatter
+  - TextFormatter
+  - JSONFormatter
+- Support multiple rolling file writers
+  - FixedSizeFileWriter
+  - DailyFileWriter
+  - AlwaysNewFileWriter
 
 Installation
 ---------------
@@ -24,8 +28,6 @@ $ go get github.com/subchen/go-log
 Usage
 ---------------
 
-### Default log to console
-
 ```go
 package main
 
@@ -40,31 +42,36 @@ func main() {
     log.Errorf("error = %v", errors.New("some error"))
 
     // dynamic set level
-    log.SetLevel(log.L_INFO)
+    log.Default.Level = log.DEBUG
 
     log.Debug("cannot output debug message")
-    log.Info("can output info message")
+    log.Infoln("can output info message")
 }
 ```
 
-### Output to file
+### Output
 
-You can call `SetWriter` to set a file writer into log.
+Default log to console, you can set `Logger.Out` to set a file writer into log.
 
 ```go
-log.SetWriter(&log.FixedSizeFileWriter{
+import (
+    "github.com/subchen/go-log"
+    "github.com/subchen/go-log/writers"
+)
+
+log.Default.Out = &writers.FixedSizeFileWriter{
     Name:     "/tmp/test.log",
     MaxSize:  10 * 1024 * 1024, // 10m
     MaxCount: 10,
 })
 ```
 
-### We defined three writers for use
+Three builtin writers for use
 
 ```go
 // Create log file if file size large than fixed size (10m)
 // files: /tmp/test.log.0 .. test.log.10
-&log.FixedSizeFileWriter{
+&writers.FixedSizeFileWriter{
     Name:     "/tmp/test.log",
     MaxSize:  10 * 1024 * 1024, // 10m
     MaxCount: 10,
@@ -72,14 +79,14 @@ log.SetWriter(&log.FixedSizeFileWriter{
 
 // Create log file every day.
 // files: /tmp/test.log.20160102
-&log.DailyFileWriter{
+&writers.DailyFileWriter{
     Name: "/tmp/test.log",
     MaxCount: 10,
 }
 
 // Create log file every process.
 // files: /tmp/test.log.20160102_150405
-&log.AlwaysNewFileWriter{
+&writers.AlwaysNewFileWriter{
     Name: "/tmp/test.log",
     MaxCount: 10,
 }
@@ -87,7 +94,7 @@ log.SetWriter(&log.FixedSizeFileWriter{
 // Output to multiple writes
 io.MultiWriter(
     os.Stdout,
-    &log.DailyFileWriter{
+    &writers.DailyFileWriter{
         Name: "/tmp/test.log",
         MaxCount: 10,
     }
@@ -95,44 +102,36 @@ io.MultiWriter(
 )
 ```
 
-### New log instance
+### Formatter
 
 ```go
 import (
     "github.com/subchen/go-log"
+    "github.com/subchen/go-log/formatters"
 )
 
-func main() {
-    logger := log.New(&log.DailyFileWriter{
-        Name: "/tmp/test.log",
-    })
-
-    logger.Debugf("i = %d", 99)
-}
+log.Default.Formatter = new(formatters.TextFormatter)
 ```
 
-### Output stack
 
-You can use `log.Fatal(...)` or `log.Fatalf(...)` to output full stack
+### New Logger instance
 
-```
-21:04:32.884 main FATAL logger_test.go:24 this is a fatal message
-	at /go/src/github.com/subchen/go-log/logger_test.go:24 (0x81db3)
-	at /usr/local/Cellar/go/1.5.2/libexec/src/testing/testing.go:456 (0x786c8)
-	at /usr/local/Cellar/go/1.5.2/libexec/src/runtime/asm_amd64.s:1721 (0x59641)
-```
+```go
+import (
+    "github.com/subchen/go-log"
+)
 
-### Log format
+func main() {
+    logger := &log.Logger{
+		Level:     log.INFO,
+		Formatter: new(formatters.JSONFormatter),
+		Out:       os.Stdout,
+	}
 
+    logger.Infof("i = %d", 99)
+}
 ```
-# time pid [name] [gid] level file:line message
-2016-02-10 19:33:02.587 12345 main 987 INFO fixed_size_file_writer_test.go:16 message ...
-```
-
-* `log.SetTimeFormat("2006-01-02 15:04:05.999")` customize time format
-* `log.SetAppName("main")` add a name in log for indicate process
-* `log.SetFlags(F_TIME | F_LONG_FILE | F_SHORT_FILE | F_PID | F_GID | F_COLOR)` to control what's printed
 
-### API on godoc.org
+## LICENSE
 
-https://godoc.org/github.com/subchen/go-log
+Apache 2.0