126 lines
2.7 KiB
JavaScript
126 lines
2.7 KiB
JavaScript
/**
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* Generic logger
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*
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* Copyright (C) 2017 LoVullo Associates, Inc.
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*
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* This file is part of the Liza Data Collection Framework.
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*
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* liza is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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var fs = require( 'fs' ),
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sprintf = require( 'php' ).sprintf,
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Class = require( 'easejs' ).Class;
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/**
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* Base logging class
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*/
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module.exports = Class( 'Log',
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{
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/**
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* File descriptor (if any)
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* @var String|null
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*/
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'private _fd': null,
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/**
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* Name of file that is being logged to (if any)
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* @var String
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*/
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'private _filename': '',
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/**
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* Log to standard out
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* @var Boolean
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*/
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stdout: true,
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/**
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* Log to standard error
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* @var Boolean
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*/
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stderr: false,
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set filename( val )
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{
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if ( val === null )
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{
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this._file = null;
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return;
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}
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// must be a string if not null
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var fn = ''+( val );
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this._filename = fn;
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this._fdWaiting = true;
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// open synchronously (logs are important, yo! - which is why we also
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// aren't going to enclose this in a try/catch block)
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this._fd = fs.openSync( fn, 'a' );
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},
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get filename()
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{
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return this._filename;
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},
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/**
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* Initializes access log
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*
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* @param String filename file to log output to
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*
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* @return undefined
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*/
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'virtual public __construct': function( filename )
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{
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if ( filename )
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{
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this.filename = ''+( filename );
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}
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},
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/**
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* Writes to log in sprintf-style manner
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*
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* @return Log self
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*/
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'public write': function()
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{
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// convert arguments to an array
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var args = Array.prototype.slice.call( arguments );
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// log to standard out?
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if ( this.stdout === true )
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{
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console.log.apply( this, args );
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}
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// log to file?
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if ( this._fd !== null )
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{
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var buffer = new Buffer( sprintf.apply( this, args ) + "\n" );
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fs.write( this._fd, buffer, 0, buffer.length, null );
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}
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return this;
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},
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} );
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