--- /dev/null
+/*\r
+\r
+ Derby - Class org.apache.derby.iapi.store.raw.AuxObject\r
+\r
+ Licensed to the Apache Software Foundation (ASF) under one or more\r
+ contributor license agreements. See the NOTICE file distributed with\r
+ this work for additional information regarding copyright ownership.\r
+ The ASF licenses this file to you under the Apache License, Version 2.0\r
+ (the "License"); you may not use this file except in compliance with\r
+ the License. You may obtain a copy of the License at\r
+\r
+ http://www.apache.org/licenses/LICENSE-2.0\r
+\r
+ Unless required by applicable law or agreed to in writing, software\r
+ distributed under the License is distributed on an "AS IS" BASIS,\r
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+ See the License for the specific language governing permissions and\r
+ limitations under the License.\r
+\r
+ */\r
+\r
+package org.apache.derby.iapi.store.raw;\r
+\r
+/**\r
+\r
+ The interface of objects which can be associated with a page while it's in cache.\r
+\r
+ @see Page#setAuxObject\r
+\r
+*/\r
+public interface AuxObject\r
+{\r
+ /** \r
+ This method is called by the page manager when it's about to evict a\r
+ page which is holding an aux object, or when a rollback occurred on the\r
+ page. The aux object should release its resources. The aux object can\r
+ assume that no one else has access to it via the raw store during this\r
+ method call. After this method returns the raw store throws away any\r
+ reference to this object. \r
+ */\r
+ public void auxObjectInvalidated();\r
+}\r