feat: add fields with logx methods, support using third party logging libs.

[kevwan]

Examples:

logx.Infow("fetch URL",
	logx.Field("url", "http://localhost:8080/hello"),
	logx.Field("attempt", 3),
	logx.Field("backoff", time.Second),
)
logx.Errorw("failed to fetch URL",
	logx.Field("url", "http://localhost:8080/hello"),
	logx.Field("attempt", 3),
	logx.Field("backoff", time.Second),
)
logx.Sloww("slow to fetch URL",
	logx.Field("url", "http://localhost:8080/hello"),
	logx.Field("attempt", 3),
	logx.Field("backoff", time.Second),
)
logx.Error("hello")
logx.Infov(map[string]interface{}{
	"url":     "localhost:8080/hello",
	"attempt": 3,
	"backoff": time.Second,
})
logx.WithDuration(1100*time.Microsecond).Infow("slow to fetch URL",
	logx.Field("url", "localhost:8080/hello"),
	logx.Field("attempt", 3),
	logx.Field("backoff", time.Second),
)
logx.WithContext(context.Background()).WithDuration(1100*time.Microsecond).Errorw(
	"failed to fetch URL",
	logx.Field("url", "localhost:8080/hello"),
	logx.Field("attempt", 3),
	logx.Field("backoff", time.Second),
)
logx.WithDuration(1100*time.Microsecond).WithContext(context.Background()).Errorw(
	"failed to fetch URL",
	logx.Field("url", "localhost:8080/hello"),
	logx.Field("attempt", 3),
	logx.Field("backoff", time.Second),
)

Outputs like:

{"@timestamp":"2022-04-30T13:00:23.692+08:00","attempt":3,"backoff":"1s","caller":"main.go:63","content":"failed to fetch URL","level":"error","url":"http://localhost:8080/hello"}
{"@timestamp":"2022-04-30T13:00:23.692+08:00","attempt":3,"backoff":"1s","caller":"main.go:68","content":"slow to fetch URL","level":"slow","url":"http://localhost:8080/hello"}
{"@timestamp":"2022-04-30T13:00:23.692+08:00","caller":"main.go:73","content":"hello","level":"error"}
{"@timestamp":"2022-04-30T13:00:23.692+08:00","attempt":3,"backoff":"1s","caller":"main.go:58","content":"fetch URL","level":"info","url":"http://localhost:8080/hello"}
{"@timestamp":"2022-04-30T13:00:23.692+08:00","caller":"main.go:74","content":{"attempt":3,"backoff":1000000000,"url":"localhost:8080/hello"},"level":"info"}
{"@timestamp":"2022-04-30T13:00:23.692+08:00","attempt":3,"backoff":"1s","caller":"main.go:79","content":"slow to fetch URL","duration":"1.1ms","level":"info","url":"localhost:8080/hello"}
{"@timestamp":"2022-04-30T13:00:23.692+08:00","attempt":3,"backoff":"1s","caller":"main.go:84","content":"failed to fetch URL","duration":"1.1ms","level":"error","url":"localhost:8080/hello"}
{"@timestamp":"2022-04-30T13:00:23.692+08:00","attempt":3,"backoff":"1s","caller":"main.go:90","content":"failed to fetch URL","duration":"1.1ms","level":"error","url":"localhost:8080/hello"}
{"@timestamp":"2022-04-30T13:01:23.693+08:00","caller":"usage.go:61","content":"CPU: 0m, MEMORY: Alloc=2.1Mi, TotalAlloc=2.1Mi, Sys=14.5Mi, NumGC=0","level":"stat"}

Using third party libs for logging:

https://github.com/zeromicro/zero-contrib/tree/main/logx/zapx

https://github.com/zeromicro/zero-contrib/tree/main/logx/logrusx

[smithyj]

This feature is quite useful.

[zhoushuguang]

+LGTM

[fynxiu]

LGTM

[nchtw164]

LGTM