Source Code Cross Referenced for DirectAllocActions.java in  » Database-DBMS » db-derby-10.2 » org » apache » derby » impl » store » raw » data » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.impl.store.raw.data 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:
003:           Derby - Class org.apache.derby.impl.store.raw.data.DirectAllocActions
004:
005:           Licensed to the Apache Software Foundation (ASF) under one or more
006:           contributor license agreements.  See the NOTICE file distributed with
007:           this work for additional information regarding copyright ownership.
008:           The ASF licenses this file to you under the Apache License, Version 2.0
009:           (the "License"); you may not use this file except in compliance with
010:           the License.  You may obtain a copy of the License at
011:
012:              http://www.apache.org/licenses/LICENSE-2.0
013:
014:           Unless required by applicable law or agreed to in writing, software
015:           distributed under the License is distributed on an "AS IS" BASIS,
016:           WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017:           See the License for the specific language governing permissions and
018:           limitations under the License.
019:
020:         */
021:
022:        package org.apache.derby.impl.store.raw.data;
023:
024:        import org.apache.derby.impl.store.raw.data.AllocationActions;
025:        import org.apache.derby.impl.store.raw.data.BasePage;
026:
027:        import org.apache.derby.iapi.services.sanity.SanityManager;
028:        import org.apache.derby.iapi.services.io.FormatIdUtil;
029:
030:        import org.apache.derby.iapi.store.raw.Loggable;
031:        import org.apache.derby.iapi.store.raw.xact.RawTransaction;
032:        import org.apache.derby.iapi.store.raw.log.LogInstant;
033:
034:        import org.apache.derby.iapi.error.StandardException;
035:
036:        public class DirectAllocActions implements  AllocationActions {
037:
038:            public DirectAllocActions() {
039:            }
040:
041:            /**
042:            	Set the allocation status of pageNumber to doStatus.  To undo this
043:            	operation, set the allocation status of pageNumber to undoStatus
044:            	
045:            	@param t				The transaction
046:            	@param allocPage		the allocation page
047:            	@param pageNumber		the page to allocation or deallocation
048:            	@param doStatus			set the allocation status of the page this value
049:            	@param undoStatus		on undo, set the allocation status of the page
050:            							this value 
051:
052:            	@exception StandardException	Standard Cloudscape error policy
053:             */
054:            public void actionAllocatePage(RawTransaction t,
055:                    BasePage allocPage, long pageNumber, int doStatus,
056:                    int undoStatus) throws StandardException {
057:                ((AllocPage) allocPage).setPageStatus((LogInstant) null,
058:                        pageNumber, doStatus);
059:            }
060:
061:            /**
062:            	Chain one allocation page to the next.
063:
064:            	@param t				The transaction
065:            	@param allocPage		the allocation page whose next page chain needs
066:            							to be changed
067:            	@param pageNumber		the next allocation page's number 
068:            	@param pageOffset		the next allocation page's page offset
069:
070:            	@exception StandardException	Standard Cloudscape error policy
071:             */
072:            public void actionChainAllocPage(RawTransaction t,
073:                    BasePage allocPage, long pageNumber, long pageOffset)
074:                    throws StandardException {
075:                ((AllocPage) allocPage).chainNextAllocPage((LogInstant) null,
076:                        pageNumber, pageOffset);
077:            }
078:
079:            /**
080:             * Compress free pages.
081:             * <p>
082:             * Compress the free pages at the end of the range maintained by
083:             * this allocation page.  All pages being compressed should be FREE.
084:             * Only pages in the last allocation page can be compressed.
085:             * <p>
086:             *
087:             * @param t				        The transaction
088:             * @param allocPage		        the allocation page to do compress on.
089:             * @param new_highest_page      The new highest page on this allocation 
090:             *                              page.  The number is the offset of the page
091:             *                              in the array of pages maintained by this 
092:             *                              allocation page, for instance a value of 0 
093:             *                              indicates all page except the first one are
094:             *                              to be truncated.  If all pages are 
095:             *                              truncated then the offset is set to -1.
096:             * @param num_pages_truncated   The number of allocated pages in this 
097:             *                              allocation page prior to the truncate.  
098:             *                              Note that all pages from NewHighestPage+1 
099:             *                              through newHighestPage+num_pages_truncated 
100:             *                              should be FREE.
101:             *
102:             * @exception  StandardException  Standard exception policy.
103:             **/
104:            public void actionCompressSpaceOperation(RawTransaction t,
105:                    BasePage allocPage, int new_highest_page,
106:                    int num_pages_truncated) throws StandardException {
107:                ((AllocPage) allocPage).compressSpace((LogInstant) null,
108:                        new_highest_page, num_pages_truncated);
109:            }
110:        }
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