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HSQLDB - Lightweight 100% Java SQL Database Engine
/* Copyright (c) 2001-2021, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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*/
package org.hsqldb.persist;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.hsqldb.Row;
import org.hsqldb.RowAVL;
import org.hsqldb.RowAction;
import org.hsqldb.Session;
import org.hsqldb.Table;
import org.hsqldb.TransactionManager;
import org.hsqldb.error.Error;
import org.hsqldb.error.ErrorCode;
import org.hsqldb.lib.ArrayUtil;
import org.hsqldb.rowio.RowInputInterface;
/*
* Implementation of PersistentStore for MEMORY tables.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.5.1
* @since 1.9.0
*/
public class RowStoreAVLMemory extends RowStoreAVL {
AtomicInteger rowIdSequence = new AtomicInteger();
public RowStoreAVLMemory(Table table) {
this.database = table.database;
this.table = table;
this.indexList = table.getIndexList();
this.accessorList = new CachedObject[indexList.length];
lock = new ReentrantReadWriteLock(true);
readLock = lock.readLock();
writeLock = lock.writeLock();
}
public boolean isMemory() {
return true;
}
public CachedObject get(long i, boolean keep) {
throw Error.runtimeError(ErrorCode.U_S0500, "RowStoreAVLMemory");
}
public CachedObject get(CachedObject object, boolean keep) {
return object;
}
public void add(Session session, CachedObject object, boolean tx) {}
public CachedObject get(RowInputInterface in) {
throw Error.runtimeError(ErrorCode.U_S0500, "RowStoreAVLMemory");
}
public CachedObject getNewCachedObject(Session session, Object object,
boolean tx) {
long id = rowIdSequence.getAndIncrement();
Row row = new RowAVL(table, (Object[]) object, id, this);
if (tx) {
RowAction.addInsertAction(session, table, this, row);
}
return row;
}
public void removeAll() {
destroyIndexes();
setTimestamp(0);
elementCount.set(0);
ArrayUtil.fillArray(accessorList, null);
}
public void remove(CachedObject object) {}
public void release(long i) {}
public void commitPersistence(CachedObject row) {}
public void postCommitAction(Session session, RowAction action) {
if (action.getType() == RowAction.ACTION_DELETE_FINAL
&& !action.isDeleteComplete()) {
action.setDeleteComplete();
Row row = action.getRow();
delete(session, row);
}
}
public void commitRow(Session session, Row row, int changeAction,
int txModel) {
if (!database.logger.isCurrentlyLogged()) {
return;
}
Object[] data = row.getData();
switch (changeAction) {
case RowAction.ACTION_DELETE :
database.logger.writeDeleteStatement(session, (Table) table,
data);
break;
case RowAction.ACTION_INSERT :
database.logger.writeInsertStatement(session, row,
(Table) table);
break;
case RowAction.ACTION_INSERT_DELETE :
// INSERT + DELETE
break;
case RowAction.ACTION_DELETE_FINAL :
throw Error.runtimeError(ErrorCode.U_S0500, "RowStore");
}
}
public void rollbackRow(Session session, Row row, int changeAction,
int txModel) {
switch (changeAction) {
case RowAction.ACTION_DELETE :
if (txModel == TransactionManager.LOCKS) {
((RowAVL) row).setNewNodes(this);
indexRow(session, row);
}
break;
case RowAction.ACTION_INSERT :
delete(session, row);
remove(row);
break;
case RowAction.ACTION_INSERT_DELETE :
// INSERT + DELETE
if (txModel == TransactionManager.LOCKS) {
remove(row);
} else {
delete(session, row);
remove(row);
}
break;
}
}
//
public DataFileCache getCache() {
return null;
}
public void setCache(DataFileCache cache) {}
public void release() {
destroyIndexes();
setTimestamp(0);
elementCount.set(0);
ArrayUtil.fillArray(accessorList, null);
}
public void readLock() {
readLock.lock();
}
public void readUnlock() {
readLock.unlock();
}
public void writeLock() {
writeLock.lock();
}
public void writeUnlock() {
writeLock.unlock();
}
}