95 lines
3.6 KiB
Go
95 lines
3.6 KiB
Go
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/*
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Copyright 2021 The logr 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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package main
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import (
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"errors"
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"time"
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"github.com/go-logr/zapr"
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"go.uber.org/zap"
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"go.uber.org/zap/zapcore"
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)
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var errSome = errors.New("some error")
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func encodeTime(_ time.Time, enc zapcore.PrimitiveArrayEncoder) {
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// Suppress actual time to keep output constant.
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enc.AppendString("TIMESTAMP")
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}
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func newZapLogger() *zap.Logger {
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// zap gets configured to not panic on invalid log calls
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// and to produce simple, deterministic output on stdout.
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zc := zap.NewProductionConfig()
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zc.OutputPaths = []string{"stdout"}
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zc.ErrorOutputPaths = zc.OutputPaths
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zc.DisableStacktrace = true
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zc.DisableCaller = true
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zc.EncoderConfig.EncodeTime = encodeTime
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z, _ := zc.Build()
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return z
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}
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func ExampleNewLogger() {
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log := zapr.NewLogger(newZapLogger())
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log.Info("info message with default options")
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log.Error(errSome, "error message with default options")
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log.Info("support for zap fields as key/value replacement is disabled", zap.Int("answer", 42))
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log.Info("invalid key", 42, "answer")
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log.Info("missing value", "answer")
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// Output:
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// {"level":"info","ts":"TIMESTAMP","msg":"info message with default options"}
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// {"level":"error","ts":"TIMESTAMP","msg":"error message with default options","error":"some error"}
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// {"level":"dpanic","ts":"TIMESTAMP","msg":"strongly-typed Zap Field passed to logr","zap field":{"Key":"answer","Type":11,"Integer":42,"String":"","Interface":null}}
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// {"level":"info","ts":"TIMESTAMP","msg":"support for zap fields as key/value replacement is disabled"}
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// {"level":"dpanic","ts":"TIMESTAMP","msg":"non-string key argument passed to logging, ignoring all later arguments","invalid key":42}
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// {"level":"info","ts":"TIMESTAMP","msg":"invalid key"}
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// {"level":"dpanic","ts":"TIMESTAMP","msg":"odd number of arguments passed as key-value pairs for logging","ignored key":"answer"}
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// {"level":"info","ts":"TIMESTAMP","msg":"missing value"}
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}
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func ExampleLogInfoLevel() {
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log := zapr.NewLoggerWithOptions(newZapLogger(), zapr.LogInfoLevel("v"))
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log.Info("info message with numeric verbosity level")
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log.Error(errSome, "error messages have no numeric verbosity level")
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// Output:
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// {"level":"info","ts":"TIMESTAMP","msg":"info message with numeric verbosity level","v":0}
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// {"level":"error","ts":"TIMESTAMP","msg":"error messages have no numeric verbosity level","error":"some error"}
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}
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func ExampleErrorKey() {
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log := zapr.NewLoggerWithOptions(newZapLogger(), zapr.ErrorKey("err"))
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log.Error(errSome, "error message with non-default error key")
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// Output:
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// {"level":"error","ts":"TIMESTAMP","msg":"error message with non-default error key","err":"some error"}
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}
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func ExampleAllowZapFields() {
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log := zapr.NewLoggerWithOptions(newZapLogger(), zapr.AllowZapFields(true))
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log.Info("log zap field", zap.Int("answer", 42))
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// Output:
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// {"level":"info","ts":"TIMESTAMP","msg":"log zap field","answer":42}
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}
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func ExampleDPanicOnBugs() {
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log := zapr.NewLoggerWithOptions(newZapLogger(), zapr.DPanicOnBugs(false))
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log.Info("warnings suppressed", zap.Int("answer", 42))
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// Output:
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// {"level":"info","ts":"TIMESTAMP","msg":"warnings suppressed"}
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}
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