1 /*** 2 * 3 * Copyright 2004 Hiram Chirino 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * 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 **/ 18 package org.codehaus.activemq.journal; 19 20 /*** 21 * Defines an object which listens for Journal Events. 22 * 23 * @version $Revision: 1.1 $ 24 */ 25 public interface JournalEventListener { 26 27 /*** 28 * This event is issues when a Journal implementations wants to recover 29 * disk space used by old records. If journal space is not reliquised 30 * by setting the Journal's mark at or past the <code>safeLocation</code> 31 * further write opperations against the Journal may casuse IOExceptions 32 * to occur due to a log overflow condition. 33 * 34 * @param safeLocation the oldest location that the journal recomends the mark to be set. 35 */ 36 void overflowNotification(RecordLocation safeLocation); 37 38 }