log

This a logger supporting the following outputs:

• stderr
• network (TCP, UDP, Unix networks)
• file (zlib compression)
• custom output

Installation

go get github.com/avegner/log

API

Logger has a very simple interface:

type Logger interface {
    Printf(level Level, format string, args ...interface{}) error
    SetMask(mask Level)
    Flush() error
    Child(name string) Logger
}

• Printf - prints a log message with the given level
• SetMask - sets enabled log levels
• Flush - flushes all log outputs
• Child - creates a child logger with the same parameters (mask, outputs, flags)

Each output supports the following interface:

type Outputter interface {
    io.Writer
    io.Closer
    Flush() error
}

There are standard outputs:

func NewNetOut(network, address string) (Outputter, error)
func NewFileOut(name string, perm os.FileMode, append bool, comprLevel int) (Outputter, error)
func NewStderrOut() (Outputter, error)

Any custom output implementing Outputter interface may be created.

To create a logger and a child logger:

// main scope
o, err := out.NewStderrOut()
if err != nil {
    // ...
}
mlog := log.New("main", log.ALL_LEVELS, log.STD_FLAGS, []out.Outputter{o})
// module scope
chlog := mlog.Child("module")