library/log4php/pattern/LoggerPatternConverterDate.php
author Markus Broeker<broeker.markus@googlemail.com>
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<?php
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/**
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 * Licensed to the Apache Software Foundation (ASF) under one or more
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 * contributor license agreements. See the NOTICE file distributed with
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 * this work for additional information regarding copyright ownership.
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 * The ASF licenses this file to You under the Apache License, Version 2.0
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 * (the "License"); you may not use this file except in compliance with
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 * the License. You may obtain a copy of the License at
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 *
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 *       http://www.apache.org/licenses/LICENSE-2.0
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 *
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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 log4php
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 */
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/**
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 * Returns the date/time of the logging request.
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 *
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 * Option: the datetime format, as used by the date() function. If
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 * the option is not given, the default format 'c' will be used.
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 *
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 * There are several "special" values which can be given for this option:
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 * 'ISO8601', 'ABSOLUTE' and 'DATE'.
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 *
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 * @package log4php
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 * @subpackage pattern
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 * @version $Revision: 1326626 $
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 * @since 2.3
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 */
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class LoggerPatternConverterDate extends LoggerPatternConverter {
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    const DATE_FORMAT_ISO8601 = 'c';
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    const DATE_FORMAT_ABSOLUTE = 'H:i:s';
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    const DATE_FORMAT_DATE = 'd M Y H:i:s.u';
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    private $format = self::DATE_FORMAT_ISO8601;
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    private $specials = array(
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        'ISO8601' => self::DATE_FORMAT_ISO8601,
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        'ABSOLUTE' => self::DATE_FORMAT_ABSOLUTE,
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        'DATE' => self::DATE_FORMAT_DATE,
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    );
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    private $useLocalDate = false;
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    public function activateOptions() {
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        // Parse the option (date format)
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        if (!empty($this->option)) {
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            if (isset($this->specials[$this->option])) {
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                $this->format = $this->specials[$this->option];
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            } else {
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                $this->format = $this->option;
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            }
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        }
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        // Check whether the pattern contains milliseconds (u)
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        if (preg_match('/(?<!\\\\)u/', $this->format)) {
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            $this->useLocalDate = true;
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        }
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    }
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    public function convert(LoggerLoggingEvent $event) {
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        if ($this->useLocalDate) {
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            return $this->date($this->format, $event->getTimeStamp());
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        }
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        return date($this->format, $event->getTimeStamp());
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    }
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    /**
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     * Currently, PHP date() function always returns zeros for milliseconds (u)
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     * on Windows. This is a replacement function for date() which correctly
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     * displays milliseconds on all platforms.
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     *
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     * It is slower than PHP date() so it should only be used if necessary.
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     */
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    private function date($format, $utimestamp) {
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        $timestamp = floor($utimestamp);
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        $ms = floor(($utimestamp - $timestamp) * 1000);
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        $ms = str_pad($ms, 3, '0', STR_PAD_LEFT);
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        return date(preg_replace('`(?<!\\\\)u`', $ms, $format), $timestamp);
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    }
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}