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The Apache Log4j Implementation
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.logging.log4j.core.filter;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.TimeZone;
import org.apache.logging.log4j.core.Filter;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.config.Node;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
import org.apache.logging.log4j.core.config.plugins.PluginFactory;
/**
* Filters events that fall within a specified time period in each day.
*/
@Plugin(name = "TimeFilter", category = Node.CATEGORY, elementType = Filter.ELEMENT_TYPE, printObject = true)
public final class TimeFilter extends AbstractFilter {
/**
* Length of hour in milliseconds.
*/
private static final long HOUR_MS = 3600000;
/**
* Length of minute in milliseconds.
*/
private static final long MINUTE_MS = 60000;
/**
* Length of second in milliseconds.
*/
private static final long SECOND_MS = 1000;
/**
* Starting offset from midnight in milliseconds.
*/
private final long start;
/**
* Ending offset from midnight in milliseconds.
*/
private final long end;
/**
* Timezone.
*/
private final TimeZone timezone;
private TimeFilter(final long start, final long end, final TimeZone tz, final Result onMatch,
final Result onMismatch) {
super(onMatch, onMismatch);
this.start = start;
this.end = end;
timezone = tz;
}
@Override
public Result filter(final LogEvent event) {
final Calendar calendar = Calendar.getInstance(timezone);
calendar.setTimeInMillis(event.getTimeMillis());
//
// get apparent number of milliseconds since midnight
// (ignores extra or missing hour on daylight time changes).
//
final long apparentOffset = calendar.get(Calendar.HOUR_OF_DAY) * HOUR_MS +
calendar.get(Calendar.MINUTE) * MINUTE_MS +
calendar.get(Calendar.SECOND) * SECOND_MS +
calendar.get(Calendar.MILLISECOND);
return apparentOffset >= start && apparentOffset < end ? onMatch : onMismatch;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append("start=").append(start);
sb.append(", end=").append(end);
sb.append(", timezone=").append(timezone.toString());
return sb.toString();
}
/**
* Create a TimeFilter.
* @param start The start time.
* @param end The end time.
* @param tz timezone.
* @param match Action to perform if the time matches.
* @param mismatch Action to perform if the action does not match.
* @return A TimeFilter.
*/
@PluginFactory
public static TimeFilter createFilter(
@PluginAttribute("start") final String start,
@PluginAttribute("end") final String end,
@PluginAttribute("timezone") final String tz,
@PluginAttribute("onMatch") final Result match,
@PluginAttribute("onMismatch") final Result mismatch) {
final long s = parseTimestamp(start, 0);
final long e = parseTimestamp(end, Long.MAX_VALUE);
final TimeZone timezone = tz == null ? TimeZone.getDefault() : TimeZone.getTimeZone(tz);
final Result onMatch = match == null ? Result.NEUTRAL : match;
final Result onMismatch = mismatch == null ? Result.DENY : mismatch;
return new TimeFilter(s, e, timezone, onMatch, onMismatch);
}
private static long parseTimestamp(final String timestamp, final long defaultValue) {
if (timestamp == null) {
return defaultValue;
}
final SimpleDateFormat stf = new SimpleDateFormat("HH:mm:ss");
stf.setTimeZone(TimeZone.getTimeZone("UTC"));
try {
return stf.parse(timestamp).getTime();
} catch (final ParseException e) {
LOGGER.warn("Error parsing TimeFilter timestamp value {}", timestamp, e);
return defaultValue;
}
}
}