mirror of
https://github.com/prometheus/statsd_exporter.git
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97 lines
2.4 KiB
Go
97 lines
2.4 KiB
Go
// Copyright 2021 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package level
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import (
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"fmt"
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"github.com/go-kit/log"
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"github.com/go-kit/log/level"
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)
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var logLevel = LevelInfo
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// A Level is a logging priority. Higher levels are more important.
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type Level int
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const (
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// LevelDebug logs are typically voluminous, and are usually disabled in
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// production.
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LevelDebug Level = iota
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// LevelInfo is the default logging priority.
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LevelInfo
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// LevelWarn logs are more important than Info, but don't need individual
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// human review.
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LevelWarn
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// LevelError logs are high-priority. If an application is running smoothly,
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// it shouldn't generate any error-level logs.
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LevelError
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)
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var emptyLogger = &EmptyLogger{}
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type EmptyLogger struct{}
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func (l *EmptyLogger) Log(keyvals ...interface{}) error {
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return nil
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}
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// SetLogLevel sets the log level.
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func SetLogLevel(level string) error {
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switch level {
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case "debug":
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logLevel = LevelDebug
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case "info":
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logLevel = LevelInfo
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case "warn":
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logLevel = LevelWarn
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case "error":
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logLevel = LevelError
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default:
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return fmt.Errorf("unrecognized log level %s", level)
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}
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return nil
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}
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// Error returns a logger that includes a Key/ErrorValue pair.
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func Error(logger log.Logger) log.Logger {
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if logLevel <= LevelError {
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return level.Error(logger)
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}
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return emptyLogger
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}
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// Warn returns a logger that includes a Key/WarnValue pair.
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func Warn(logger log.Logger) log.Logger {
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if logLevel <= LevelWarn {
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return level.Warn(logger)
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}
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return emptyLogger
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}
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// Info returns a logger that includes a Key/InfoValue pair.
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func Info(logger log.Logger) log.Logger {
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if logLevel <= LevelInfo {
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return level.Info(logger)
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}
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return emptyLogger
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}
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// Debug returns a logger that includes a Key/DebugValue pair.
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func Debug(logger log.Logger) log.Logger {
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if logLevel <= LevelDebug {
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return level.Debug(logger)
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}
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return emptyLogger
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}
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