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 */ 017package org.apache.logging.log4j.core.appender.rolling; 018 019import java.lang.reflect.Method; 020 021import org.apache.logging.log4j.core.LogEvent; 022import org.apache.logging.log4j.core.config.plugins.Plugin; 023import org.apache.logging.log4j.core.config.plugins.PluginFactory; 024import org.apache.logging.log4j.core.util.Loader; 025import org.apache.logging.log4j.status.StatusLogger; 026 027/** 028 * Triggers a rollover on every restart, but only if the file size is greater than zero. 029 */ 030@Plugin(name = "OnStartupTriggeringPolicy", category = "Core", printObject = true) 031public class OnStartupTriggeringPolicy implements TriggeringPolicy { 032 private RollingFileManager manager; 033 034 /** 035 * Provide the RollingFileManager to the policy. 036 * @param manager The RollingFileManager. 037 */ 038 @Override 039 public void initialize(final RollingFileManager manager) { 040 this.manager = manager; 041 if (manager.getFileSize() > 0) { 042 manager.skipFooter(true); 043 manager.rollover(); 044 manager.skipFooter(false); 045 } 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 return false; 056 } 057 058 @Override 059 public String toString() { 060 return "OnStartupTriggeringPolicy"; 061 } 062 063 @PluginFactory 064 public static OnStartupTriggeringPolicy createPolicy() { 065 return new OnStartupTriggeringPolicy(); 066 } 067}