45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
/*
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* Copyright (c) 2021 IBM Corp and others.
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*
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v2.0
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* and Eclipse Distribution License v1.0 which accompany this distribution.
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*
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* The Eclipse Public License is available at
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* https://www.eclipse.org/legal/epl-2.0/
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* and the Eclipse Distribution License is available at
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* http://www.eclipse.org/org/documents/edl-v10.php.
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*
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* Contributors:
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* Seth Hoenig
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* Allan Stockdill-Mander
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* Mike Robertson
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*/
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package mqtt
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type (
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// Logger interface allows implementations to provide to this package any
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// object that implements the methods defined in it.
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Logger interface {
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Println(v ...interface{})
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Printf(format string, v ...interface{})
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}
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// NOOPLogger implements the logger that does not perform any operation
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// by default. This allows us to efficiently discard the unwanted messages.
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NOOPLogger struct{}
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)
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func (NOOPLogger) Println(v ...interface{}) {}
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func (NOOPLogger) Printf(format string, v ...interface{}) {}
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// Internal levels of library output that are initialised to not print
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// anything but can be overridden by programmer
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var (
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ERROR Logger = NOOPLogger{}
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CRITICAL Logger = NOOPLogger{}
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WARN Logger = NOOPLogger{}
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DEBUG Logger = NOOPLogger{}
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)
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