001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache license, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the license for the specific language governing permissions and 015 * limitations under the license. 016 */ 017 package org.apache.logging.log4j.core.appender.rolling; 018 019 import org.apache.logging.log4j.core.LogEvent; 020 import org.apache.logging.log4j.core.config.plugins.Plugin; 021 import org.apache.logging.log4j.core.config.plugins.PluginFactory; 022 023 import java.lang.management.ManagementFactory; 024 025 /** 026 * Trigger a rollover on every restart. The target file's timestamp is compared with the JVM start time 027 * and if it is older isTriggeringEvent will return true. After isTriggeringEvent has been called it will 028 * always return false. 029 */ 030 031 @Plugin(name = "OnStartupTriggeringPolicy", category = "Core", printObject = true) 032 public class OnStartupTriggeringPolicy implements TriggeringPolicy { 033 private static final long JVM_START_TIME = ManagementFactory.getRuntimeMXBean().getStartTime(); 034 035 private boolean evaluated = false; 036 037 private RollingFileManager manager; 038 039 /** 040 * Provide the RollingFileManager to the policy. 041 * @param manager The RollingFileManager. 042 */ 043 @Override 044 public void initialize(final RollingFileManager manager) { 045 this.manager = manager; 046 } 047 048 /** 049 * Determine if a rollover should be triggered. 050 * @param event A reference to the current event. 051 * @return true if the target file's timestamp is older than the JVM start time. 052 */ 053 @Override 054 public boolean isTriggeringEvent(final LogEvent event) { 055 if (evaluated) { 056 return false; 057 } 058 evaluated = true; 059 return manager.getFileTime() < JVM_START_TIME; 060 } 061 062 @Override 063 public String toString() { 064 return "OnStartupTriggeringPolicy"; 065 } 066 067 @PluginFactory 068 public static OnStartupTriggeringPolicy createPolicy() { 069 return new OnStartupTriggeringPolicy(); 070 } 071 }