/* Copyright (c) 2001-2016, 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
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*/
package org.hsqldb.persist;
import java.util.concurrent.atomic.
AtomicInteger;
import java.util.concurrent.locks.
Lock;
import java.util.concurrent.locks.
ReadWriteLock;
import java.util.concurrent.locks.
ReentrantReadWriteLock;
import org.hsqldb.
Database;
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 2.3.5
* @since 1.9.0
*/
public class
RowStoreAVLMemory extends
RowStoreAVL implements
PersistentStore {
Database database;
AtomicInteger rowIdSequence = new
AtomicInteger();
ReadWriteLock lock;
Lock readLock;
Lock writeLock;
public
RowStoreAVLMemory(
Table table) {
this.
database =
table.
database;
this.
table =
table;
this.
indexList =
table.
getIndexList();
this.
accessorList = new
CachedObject[
indexList.length];
lock = new
ReentrantReadWriteLock();
readLock =
lock.
readLock();
writeLock =
lock.
writeLock();
}
public boolean
isMemory() {
return true;
}
public int
getAccessCount() {
return 0;
}
public void
set(
CachedObject object) {}
public
CachedObject get(long
i) {
throw
Error.
runtimeError(
ErrorCode.
U_S0500, "RowStoreAVMemory");
}
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) {
int
id =
rowIdSequence.
getAndIncrement();
Row row = new
RowAVL(
table, (
Object[])
object,
id, this);
if (
tx) {
RowAction.
addInsertAction(
session,
table,
row);
}
return
row;
}
public void
removeAll() {
destroy();
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) {
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() {
destroy();
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();
}
}