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package org.hsqldb.persist;
import java.io.IOException;
import org.hsqldb.HsqlException;
import org.hsqldb.Row;
import org.hsqldb.RowAVL;
import org.hsqldb.RowAVLDisk;
import org.hsqldb.RowAVLDiskLarge;
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.index.Index;
import org.hsqldb.index.NodeAVL;
import org.hsqldb.index.NodeAVLDisk;
import org.hsqldb.lib.ArrayUtil;
import org.hsqldb.lib.DoubleIntIndex;
import org.hsqldb.lib.LongLookup;
import org.hsqldb.navigator.RowIterator;
import org.hsqldb.rowio.RowInputInterface;
import org.hsqldb.rowio.RowOutputInterface;
/*
* Implementation of PersistentStore for CACHED tables.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.3.2
* @since 1.9.0
*/
public class RowStoreAVLDisk extends RowStoreAVL implements PersistentStore {
DataFileCache cache;
RowOutputInterface rowOut;
boolean largeData;
public RowStoreAVLDisk(PersistentStoreCollection manager,
DataFileCache cache, Table table) {
this(manager, table);
this.cache = cache;
rowOut = cache.rowOut.duplicate();
cache.adjustStoreCount(1);
largeData = database.logger.propLargeData;
tableSpace = cache.spaceManager.getTableSpace(table.getSpaceID());
}
protected RowStoreAVLDisk(PersistentStoreCollection manager, Table table) {
this.database = table.database;
this.manager = manager;
this.table = table;
this.indexList = table.getIndexList();
this.accessorList = new CachedObject[indexList.length];
manager.setStore(table, this);
largeData = database.logger.getDataFileFactor() > 1;
}
public boolean isMemory() {
return false;
}
public int getAccessCount() {
return cache.getAccessCount();
}
public void set(CachedObject object) {
database.txManager.setTransactionInfo(this, object);
}
public CachedObject get(long key) {
CachedObject object = cache.get(key, this, false);
return object;
}
public CachedObject get(long key, boolean keep) {
CachedObject object = cache.get(key, this, keep);
return object;
}
public CachedObject get(CachedObject object, boolean keep) {
object = cache.get(object, this, keep);
return object;
}
public void add(Session session, CachedObject object, boolean tx) {
int size = object.getRealSize(rowOut);
size += indexList.length * NodeAVLDisk.SIZE_IN_BYTE;
size = rowOut.getStorageSize(size);
object.setStorageSize(size);
long pos = tableSpace.getFilePosition(size, false);
object.setPos(pos);
if (tx) {
Row row = (Row) object;
RowAction action = new RowAction(session, table,
RowAction.ACTION_INSERT, row,
null);
row.rowAction = action;
database.txManager.addTransactionInfo(object);
}
cache.add(object);
storageSize += size;
}
public CachedObject get(RowInputInterface in) {
try {
if (largeData) {
return new RowAVLDiskLarge(table, in);
} else {
return new RowAVLDisk(table, in);
}
} catch (IOException e) {
throw Error.error(ErrorCode.DATA_FILE_ERROR, e);
}
}
public CachedObject getNewCachedObject(Session session, Object object,
boolean tx) {
Row row;
if (largeData) {
row = new RowAVLDiskLarge(table, (Object[]) object, this);
} else {
row = new RowAVLDisk(table, (Object[]) object, this);
}
add(session, row, tx);
return row;
}
public void indexRow(Session session, Row row) {
try {
row = (Row) get(row, true);
super.indexRow(session, row);
row.keepInMemory(false);
} catch (HsqlException e) {
database.txManager.removeTransactionInfo(row);
throw e;
}
}
public void removeAll() {
elementCount.set(0);
cache.spaceManager.freeTableSpace(tableSpace.getSpaceID());
ArrayUtil.fillArray(accessorList, null);
}
public void remove(CachedObject object) {
cache.remove(object);
tableSpace.release(object.getPos(), object.getStorageSize());
storageSize -= object.getStorageSize();
}
public void commitPersistence(CachedObject 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);
if (txModel == TransactionManager.LOCKS) {
remove(row);
}
break;
case RowAction.ACTION_INSERT :
database.logger.writeInsertStatement(session, row,
(Table) table);
break;
case RowAction.ACTION_INSERT_DELETE :
// INSERT + DELETE
if (txModel == TransactionManager.LOCKS) {
remove(row);
}
break;
case RowAction.ACTION_DELETE_FINAL :
delete(session, row);
// remove info after delete but before removing persistence
database.txManager.removeTransactionInfo(row);
remove(row);
break;
}
}
public void rollbackRow(Session session, Row row, int changeAction,
int txModel) {
switch (changeAction) {
case RowAction.ACTION_DELETE :
if (txModel == TransactionManager.LOCKS) {
row = (Row) get(row, true);
((RowAVL) row).setNewNodes(this);
row.keepInMemory(false);
indexRow(session, row);
}
break;
case RowAction.ACTION_INSERT :
delete(session, row);
// remove info after delete but before removing persistence
database.txManager.removeTransactionInfo(row);
remove(row);
break;
case RowAction.ACTION_INSERT_DELETE :
if (txModel != TransactionManager.LOCKS) {
// INSERT + DELETE
delete(session, row);
// remove info after delete but before removing persistence
database.txManager.removeTransactionInfo(row);
}
remove(row);
break;
}
}
public void postCommitAction(Session session, RowAction action) {
database.txManager.removeTransactionInfo(action.getPos());
}
//
public DataFileCache getCache() {
return cache;
}
/**
* Works only for TEXT TABLE as others need specific spaceManager
*/
public void setCache(DataFileCache cache) {
throw Error.runtimeError(ErrorCode.U_S0500, "RowStoreAVLDisk");
}
public void release() {
cache.adjustStoreCount(-1);
cache = null;
elementCount.set(0);
ArrayUtil.fillArray(accessorList, null);
}
public CachedObject getAccessor(Index key) {
NodeAVL node = (NodeAVL) accessorList[key.getPosition()];
if (node == null) {
return null;
}
RowAVL row = (RowAVL) get(node.getRow(this), false);
node = row.getNode(key.getPosition());
accessorList[key.getPosition()] = node;
return node;
}
public void setAccessor(Index key, long accessor) {
CachedObject object = get(accessor, false);
if (object != null) {
NodeAVL node = ((RowAVL) object).getNode(key.getPosition());
object = node;
}
setAccessor(key, object);
}
public void resetAccessorKeys(Session session, Index[] keys) {
if (indexList.length == 0 || accessorList[0] == null) {
indexList = keys;
accessorList = new CachedObject[indexList.length];
return;
}
throw Error.runtimeError(ErrorCode.U_S0500, "RowStoreAVLDisk");
}
public void setReadOnly(boolean readOnly) {}
public void moveDataToSpace(Session session) {
Table table = (Table) this.table;
long rowCount = elementCount();
if (rowCount == 0) {
return;
}
if (rowCount > Integer.MAX_VALUE) {
// error too big
return;
}
DoubleIntIndex pointerLookup = new DoubleIntIndex((int) rowCount,
false);
pointerLookup.setKeysSearchTarget();
cache.writeLock.lock();
try {
moveDataToSpace(cache, pointerLookup);
CachedObject[] newAccessorList =
new CachedObject[accessorList.length];
for (int i = 0; i < accessorList.length; i++) {
long pos = pointerLookup.lookup(accessorList[i].getPos());
if (pos == -1) {
throw Error.error(ErrorCode.DATA_FILE_ERROR);
}
newAccessorList[i] = cache.get(pos, this, false);
}
RowIterator it = rowIterator();
// todo - check this - must remove from old space, not new one
while (it.hasNext()) {
Row row = it.getNextRow();
cache.remove(row);
tableSpace.release(row.getPos(), row.getStorageSize());
}
accessorList = newAccessorList;
} finally {
cache.writeLock.unlock();
}
database.logger.logDetailEvent("table written "
+ table.getName().name);
}
public void moveDataToSpace(DataFileCache targetCache,
LongLookup pointerLookup) {
int spaceId = table.getSpaceID();
TableSpaceManager targetSpace =
targetCache.spaceManager.getTableSpace(spaceId);
RowIterator it = rowIterator();
while (it.hasNext()) {
CachedObject row = it.getNextRow();
long newPos = targetSpace.getFilePosition(row.getStorageSize(),
false);
pointerLookup.addUnsorted(row.getPos(), newPos);
}
it = rowIterator();
while (it.hasNext()) {
CachedObject row = it.getNextRow();
targetCache.rowOut.reset();
row.write(targetCache.rowOut, pointerLookup);
long pos = pointerLookup.lookup(row.getPos());
targetCache.saveRowOutput(pos);
}
}
long getStorageSizeEstimate() {
if (elementCount.get() == 0) {
return 0;
}
CachedObject accessor = getAccessor(indexList[0]);
CachedObject row = get(accessor.getPos());
return row.getStorageSize() * elementCount.get();
}
public void writeLock() {
cache.writeLock.lock();
}
public void writeUnlock() {
cache.writeLock.unlock();
}
}