Zap Operations: Difference between revisions

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Tag: Reverted
Tag: Reverted
Line 39: Line 39:
</syntaxhighlight>
</syntaxhighlight>
=Changing Log Level Dynamically=
=Changing Log Level Dynamically=
Create the logger instance with an external <code>zap.AtomicLevel</code> instance. Updating the level on that instance updates it dynamically for the logger:
<syntaxhighlight lang='go'>
atomicLevel := zap.NewAtomicLevelAt(zap.DebugLevel)
var config zap.Config
config = zap.NewDevelopmentConfig()
config.Level = atomicLevel
logger, err := config.Build()
...
// this changes the logging level dynamically
atomicLevel.SetLevel(zap.InfoLevel)
</syntaxhighlight>


=Workbench=
=Workbench=
{{Internal|Zap Workbench|Zap Workbench}}
{{Internal|Zap Workbench|Zap Workbench}}

Revision as of 20:14, 22 January 2024

Internal

Installation

In the directory that contains go.mod:

go get -u go.uber.org/zap

Typical Usage

import "go.uber.org/zap"

...

var config zap.Config
var logger *zap.Logger
var sugaredLogger *zap.SugaredLogger
outputPath := "stderr" // ... or a local path
config = zap.NewDevelopmentConfig()
config.OutputPaths = []string{outputPath}
config.ErrorOutputPaths = []string{outputPath}
logger, err := config.Build()
if err != nil {
  panic(err)
}
sugaredLogger = logger.Sugar()
sugaredLogger.Infof("somehting")
...
logger = sugaredLogger.Desugar()

Disable Stack Trace Rendering

Stack trace on Warning is probably not necessary. However, this disable stack trace rendering altogether:

var config zap.Config
config = zap.NewDevelopmentConfig()
config.DisableStacktrace = true

Changing Log Level Dynamically

Create the logger instance with an external zap.AtomicLevel instance. Updating the level on that instance updates it dynamically for the logger:

atomicLevel := zap.NewAtomicLevelAt(zap.DebugLevel)
var config zap.Config
config = zap.NewDevelopmentConfig()
config.Level = atomicLevel
logger, err := config.Build()
...

// this changes the logging level dynamically
atomicLevel.SetLevel(zap.InfoLevel)

Workbench

Zap Workbench