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Name	Size	Permission
.github	[ DIR ]	dr-xr-xr-x
level	[ DIR ]	dr-xr-xr-x
syslog	[ DIR ]	dr-xr-xr-x
term	[ DIR ]	dr-xr-xr-x
.gitignore	269 B	-r--r--r--
LICENSE	1.04 KB	-r--r--r--
README.md	5.19 KB	-r--r--r--
benchmark_test.go	443 B	-r--r--r--
concurrency_test.go	653 B	-r--r--r--
doc.go	5.23 KB	-r--r--r--
example_test.go	2.71 KB	-r--r--r--
go.mod	82 B	-r--r--r--
go.sum	173 B	-r--r--r--
json_logger.go	2.03 KB	-r--r--r--
json_logger_test.go	4.61 KB	-r--r--r--
log.go	6.32 KB	-r--r--r--
log_test.go	8.65 KB	-r--r--r--
logfmt_logger.go	1.34 KB	-r--r--r--
logfmt_logger_test.go	1.38 KB	-r--r--r--
nop_logger.go	206 B	-r--r--r--
nop_logger_test.go	502 B	-r--r--r--
staticcheck.conf	17 B	-r--r--r--
stdlib.go	4.16 KB	-r--r--r--
stdlib_test.go	9.26 KB	-r--r--r--
sync.go	3.18 KB	-r--r--r--
sync_test.go	1.99 KB	-r--r--r--
value.go	3.33 KB	-r--r--r--
value_test.go	3.84 KB	-r--r--r--

Code Editor : example_test.go

package log_test

import (
	"math/rand"
	"os"
	"sync"
	"time"

"github.com/go-kit/log"
)

func Example_basic() {
	logger := log.NewLogfmtLogger(os.Stdout)

type Task struct {
		ID int
	}

RunTask := func(task Task, logger log.Logger) {
		logger.Log("taskID", task.ID, "event", "starting task")

logger.Log("taskID", task.ID, "event", "task complete")
	}

RunTask(Task{ID: 1}, logger)

// Output:
	// taskID=1 event="starting task"
	// taskID=1 event="task complete"
}

func Example_contextual() {
	logger := log.NewLogfmtLogger(os.Stdout)

type Task struct {
		ID  int
		Cmd string
	}

taskHelper := func(cmd string, logger log.Logger) {
		// execute(cmd)
		logger.Log("cmd", cmd, "dur", 42*time.Millisecond)
	}

RunTask := func(task Task, logger log.Logger) {
		logger = log.With(logger, "taskID", task.ID)
		logger.Log("event", "starting task")

taskHelper(task.Cmd, logger)

logger.Log("event", "task complete")
	}

RunTask(Task{ID: 1, Cmd: "echo Hello, world!"}, logger)

// Output:
	// taskID=1 event="starting task"
	// taskID=1 cmd="echo Hello, world!" dur=42ms
	// taskID=1 event="task complete"
}

func Example_valuer() {
	logger := log.NewLogfmtLogger(os.Stdout)

count := 0
	counter := func() interface{} {
		count++
		return count
	}

logger = log.With(logger, "count", log.Valuer(counter))

logger.Log("call", "first")
	logger.Log("call", "second")

// Output:
	// count=1 call=first
	// count=2 call=second
}

func Example_debugInfo() {
	logger := log.NewLogfmtLogger(os.Stdout)

// make time predictable for this test
	baseTime := time.Date(2015, time.February, 3, 10, 0, 0, 0, time.UTC)
	mockTime := func() time.Time {
		baseTime = baseTime.Add(time.Second)
		return baseTime
	}

logger = log.With(logger, "time", log.Timestamp(mockTime), "caller", log.DefaultCaller)

logger.Log("call", "first")
	logger.Log("call", "second")

// ...

logger.Log("call", "third")

// Output:
	// time=2015-02-03T10:00:01Z caller=example_test.go:93 call=first
	// time=2015-02-03T10:00:02Z caller=example_test.go:94 call=second
	// time=2015-02-03T10:00:03Z caller=example_test.go:98 call=third
}

func Example_syncWriter() {
	w := log.NewSyncWriter(os.Stdout)
	logger := log.NewLogfmtLogger(w)

type Task struct {
		ID int
	}

var wg sync.WaitGroup

RunTask := func(task Task, logger log.Logger) {
		logger.Log("taskID", task.ID, "event", "starting task")

time.Sleep(time.Duration(rand.Intn(200)) * time.Millisecond)

logger.Log("taskID", task.ID, "event", "task complete")
		wg.Done()
	}

wg.Add(2)

go RunTask(Task{ID: 1}, logger)
	go RunTask(Task{ID: 2}, logger)

wg.Wait()

// Unordered output:
	// taskID=1 event="starting task"
	// taskID=2 event="starting task"
	// taskID=1 event="task complete"
	// taskID=2 event="task complete"
}

${this.title}

Code Editor : example_test.go