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110 lines
3.8 KiB
Go
110 lines
3.8 KiB
Go
// Copyright (c) 2016 Uber Technologies, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package zap
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import "go.uber.org/zap/zapcore"
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// An Option configures a Logger.
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type Option interface {
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apply(*Logger)
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}
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// optionFunc wraps a func so it satisfies the Option interface.
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type optionFunc func(*Logger)
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func (f optionFunc) apply(log *Logger) {
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f(log)
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}
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// WrapCore wraps or replaces the Logger's underlying zapcore.Core.
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func WrapCore(f func(zapcore.Core) zapcore.Core) Option {
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return optionFunc(func(log *Logger) {
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log.core = f(log.core)
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})
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}
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// Hooks registers functions which will be called each time the Logger writes
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// out an Entry. Repeated use of Hooks is additive.
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//
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// Hooks are useful for simple side effects, like capturing metrics for the
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// number of emitted logs. More complex side effects, including anything that
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// requires access to the Entry's structured fields, should be implemented as
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// a zapcore.Core instead. See zapcore.RegisterHooks for details.
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func Hooks(hooks ...func(zapcore.Entry) error) Option {
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return optionFunc(func(log *Logger) {
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log.core = zapcore.RegisterHooks(log.core, hooks...)
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})
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}
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// Fields adds fields to the Logger.
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func Fields(fs ...Field) Option {
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return optionFunc(func(log *Logger) {
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log.core = log.core.With(fs)
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})
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}
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// ErrorOutput sets the destination for errors generated by the Logger. Note
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// that this option only affects internal errors; for sample code that sends
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// error-level logs to a different location from info- and debug-level logs,
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// see the package-level AdvancedConfiguration example.
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//
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// The supplied WriteSyncer must be safe for concurrent use. The Open and
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// zapcore.Lock functions are the simplest ways to protect files with a mutex.
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func ErrorOutput(w zapcore.WriteSyncer) Option {
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return optionFunc(func(log *Logger) {
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log.errorOutput = w
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})
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}
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// Development puts the logger in development mode, which makes DPanic-level
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// logs panic instead of simply logging an error.
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func Development() Option {
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return optionFunc(func(log *Logger) {
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log.development = true
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})
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}
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// AddCaller configures the Logger to annotate each message with the filename
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// and line number of zap's caller.
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func AddCaller() Option {
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return optionFunc(func(log *Logger) {
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log.addCaller = true
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})
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}
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// AddCallerSkip increases the number of callers skipped by caller annotation
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// (as enabled by the AddCaller option). When building wrappers around the
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// Logger and SugaredLogger, supplying this Option prevents zap from always
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// reporting the wrapper code as the caller.
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func AddCallerSkip(skip int) Option {
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return optionFunc(func(log *Logger) {
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log.callerSkip += skip
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})
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}
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// AddStacktrace configures the Logger to record a stack trace for all messages at
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// or above a given level.
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func AddStacktrace(lvl zapcore.LevelEnabler) Option {
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return optionFunc(func(log *Logger) {
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log.addStack = lvl
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})
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}
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