ext

Documentation

Index

• func ErrorHandler(h log.Handler) log.Handler
• func RandId(idlen int) string

Functions

func ErrorHandler

func ErrorHandler(h log.Handler) log.Handler

ErrorHandler wraps another handler and passes all records through unchanged except if the logged context contains a non-nil error value in its context. Then ErrorHandler will *increase* the log level to LvlError, unless it was already at LvlCrit.

This allows you to log the result of all functions for debugging and capture error conditions when in production with a single log line. Example:

reply, err := redisConn.Do("SET", "foo", "bar")
logger.Debug("Wrote value to redis", "reply", reply, "err", err)
if err != nil {
    return err
}

func RandId

func RandId(idlen int) string

RandId creates a random identifier of the requested length Useful for assigning mostly-unique identifiers for logging and identification that are unlikely to collide because of short lifespan or low set cardinality