1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache license, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the license for the specific language governing permissions and 15 * limitations under the license. 16 */ 17 package org.apache.logging.log4j.core.appender.rolling; 18 19 import org.apache.logging.log4j.core.LogEvent; 20 import org.apache.logging.log4j.core.config.plugins.Plugin; 21 import org.apache.logging.log4j.core.config.plugins.PluginFactory; 22 23 import java.lang.management.ManagementFactory; 24 25 /** 26 * Trigger a rollover on every restart. The target file's timestamp is compared with the JVM start time 27 * and if it is older isTriggeringEvent will return true. After isTriggeringEvent has been called it will 28 * always return false. 29 */ 30 31 @Plugin(name = "OnStartupTriggeringPolicy", type = "Core", printObject = true) 32 public class OnStartupTriggeringPolicy implements TriggeringPolicy { 33 private static final long JVM_START_TIME = ManagementFactory.getRuntimeMXBean().getStartTime(); 34 35 private boolean evaluated = false; 36 37 private RollingFileManager manager; 38 39 /** 40 * Provide the RollingFileManager to the policy. 41 * @param manager The RollingFileManager. 42 */ 43 public void initialize(RollingFileManager manager) { 44 this.manager = manager; 45 } 46 47 /** 48 * Determine if a rollover should be triggered. 49 * @param event A reference to the current event. 50 * @return true if the target file's timestamp is older than the JVM start time. 51 */ 52 public boolean isTriggeringEvent(LogEvent event) { 53 if (evaluated) { 54 return false; 55 } 56 evaluated = true; 57 return manager.getFileTime() < JVM_START_TIME; 58 } 59 60 @Override 61 public String toString() { 62 return "OnStartupTriggeringPolicy"; 63 } 64 65 @PluginFactory 66 public static OnStartupTriggeringPolicy createPolicy() { 67 return new OnStartupTriggeringPolicy(); 68 } 69 }