1 package org.apache.log4j.rewrite; 2 3 import org.apache.log4j.spi.LoggingEvent; 4 5 /* 6 * Licensed to the Apache Software Foundation (ASF) under one or more 7 * contributor license agreements. See the NOTICE file distributed with 8 * this work for additional information regarding copyright ownership. 9 * The ASF licenses this file to You under the Apache License, Version 2.0 10 * (the "License"); you may not use this file except in compliance with 11 * the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 */ 21 22 /** 23 * This interface is implemented to provide a rewrite 24 * strategy for RewriteAppender. RewriteAppender will 25 * call the rewrite method with a source logging event. 26 * The strategy may return that event, create a new event 27 * or return null to suppress the logging request. 28 */ 29 public interface RewritePolicy { 30 /** 31 * Rewrite a logging event. 32 * @param source a logging event that may be returned or 33 * used to create a new logging event. 34 * @return a logging event or null to suppress processing. 35 */ 36 LoggingEvent rewrite(final LoggingEvent source); 37 }