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logger.go
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logger.go
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package grpclog
import (
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
"go.uber.org/zap/zapgrpc"
"google.golang.org/grpc/grpclog"
)
// SetLogger constructs a zapgrpc.Logger instance, and installs it as grpc logger, cloned from baseLogger with
// exact configuration. The minimum level of gRPC logs is set to WARN should the loglevel of the collector is set to
// INFO to avoid copious logging from grpc framework.
func SetLogger(baseLogger *zap.Logger, loglevel zapcore.Level) *zapgrpc.Logger {
logger := zapgrpc.NewLogger(baseLogger.WithOptions(zap.WrapCore(func(core zapcore.Core) zapcore.Core {
var c zapcore.Core
var err error
if loglevel == zapcore.InfoLevel {
loglevel = zapcore.WarnLevel
}
// NewIncreaseLevelCore errors only if the new log level is less than the initial core level.
c, err = zapcore.NewIncreaseLevelCore(core, loglevel)
// In case of an error changing the level, move on, this happens when using the NopCore
if err != nil {
c = core
}
return c.With([]zapcore.Field{zap.Bool("grpc_log", true)})
})))
grpclog.SetLoggerV2(logger)
return logger
}