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; 018 019 import org.apache.logging.log4j.status.StatusLogger; 020 021 /** 022 * A life cycle to be extended. 023 * <p> 024 * Wraps a {@link LifeCycle.State}. 025 * </p> 026 */ 027 public class AbstractLifeCycle implements LifeCycle { 028 029 /** 030 * Allow subclasses access to the status logger without creating another instance. 031 */ 032 protected static final org.apache.logging.log4j.Logger LOGGER = StatusLogger.getLogger(); 033 034 private volatile LifeCycle.State state = LifeCycle.State.INITIALIZED; 035 036 public LifeCycle.State getState() { 037 return this.state; 038 } 039 040 public boolean isInitialized() { 041 return this.state == LifeCycle.State.INITIALIZED; 042 } 043 044 @Override 045 public boolean isStarted() { 046 return this.state == LifeCycle.State.STARTED; 047 } 048 049 public boolean isStarting() { 050 return this.state == LifeCycle.State.STARTING; 051 } 052 053 @Override 054 public boolean isStopped() { 055 return this.state == LifeCycle.State.STOPPED; 056 } 057 058 public boolean isStopping() { 059 return this.state == LifeCycle.State.STOPPING; 060 } 061 062 protected void setStarted() { 063 this.setState(LifeCycle.State.STARTED); 064 } 065 066 protected void setStarting() { 067 this.setState(LifeCycle.State.STARTING); 068 } 069 070 protected void setState(final LifeCycle.State newState) { 071 this.state = newState; 072 // Need a better string than this.toString() for the message 073 // LOGGER.debug("{} {}", this.state, this); 074 } 075 076 protected void setStopped() { 077 this.setState(LifeCycle.State.STOPPED); 078 } 079 080 protected void setStopping() { 081 this.setState(LifeCycle.State.STOPPING); 082 } 083 084 @Override 085 public void start() { 086 this.setStarted(); 087 } 088 089 @Override 090 public void stop() { 091 this.state = LifeCycle.State.STOPPED; 092 } 093 094 }