/
logger.go
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/
logger.go
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/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License")
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package logger
import (
"fmt"
"github.com/hazelcast/hazelcast-go-client/internal/hzerrors"
)
// Logger interface is used to provide a custom logger to the client.
// weight of type Weight, describes the log level and f function returns the message to be logged when called.
type Logger interface {
Log(weight Weight, f func() string)
}
// Weight is the importance of a log message, and used with custom loggers.
// Lower weights are more important than higher weights.
type Weight int
const (
// WeightOff means: do not log anything.
WeightOff Weight = 0
// WeightFatal is for critical errors which halt the client.
WeightFatal Weight = 100
// WeightError is for severe errors.
WeightError Weight = 200
// WeightWarn is for noting problems.
// The client can continue running.
WeightWarn Weight = 300
// WeightInfo is for informational messages.
WeightInfo Weight = 400
// WeightDebug is for logs messages which can help with diagnosing a problem.
WeightDebug Weight = 500
// WeightTrace is for potentially very detailed log messages, which are usually logged when an important function is called.
// Should not be used in production.
WeightTrace Weight = 600
)
// WeightForLogLevel returns the corresponding logger Weight with the given string if it exists, otherwise returns an error.
func WeightForLogLevel(logLevel Level) (Weight, error) {
switch logLevel {
case TraceLevel:
return WeightTrace, nil
case DebugLevel:
return WeightDebug, nil
case InfoLevel:
return WeightInfo, nil
case WarnLevel:
return WeightWarn, nil
case ErrorLevel:
return WeightError, nil
case FatalLevel:
return WeightFatal, nil
case OffLevel:
return WeightOff, nil
default:
return 0, hzerrors.NewIllegalArgumentError(fmt.Sprintf("no logger level found for %s", logLevel), nil)
}
}