isgasho / logger-2

A fast Go logger

logger is a fast Go logging package made to be simple but effective.

Overview

Install with:

go get github.com/hamba/logger

Formatters

• JSON
• Logfmt
• Console

Handlers

• StreamHandler Write directly to a Writer, usually os.Stdout
• BufferedStreamHandler A buffered version of StreamHandler
• FilterHandler Filter log line using a function
• LevelFilterHandler Filter log line by level
• DiscardHandler Discard everything

Examples

// Composable handlers
h := logger.LevelFilterHandler(
    logger.Info,
    logger.StreamHandler(os.Stdout, logger.LogfmtFormat()),
)

// The logger can have an initial context
l := logger.New(h, "env", "prod")

// All messages can have a context
l.Warn("connection error", "redis", conn.Name(), "timeout", conn.Timeout())

Will log the message

lvl=warn msg="connection error" redis=dsn_1 timeout=0.500

More examples can be found in the godocs.