/*
*
* * Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.com)
* *
* * Licensed under the Apache License, Version 2.0 (the "License");
* * you may not use this file except in compliance with the License.
* * You may obtain a copy of the License at
* *
* * http://www.apache.org/licenses/LICENSE-2.0
* *
* * Unless required by applicable law or agreed to in writing, software
* * distributed under the License is distributed on an "AS IS" BASIS,
* * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* * See the License for the specific language governing permissions and
* * limitations under the License.
* *
* * For more information: http://www.orientechnologies.com
*
*/
package com.orientechnologies.orient.core.storage.impl.local;
import java.io.IOException;
import com.orientechnologies.orient.core.config.OGlobalConfiguration;
import com.orientechnologies.orient.core.config.OStorageConfiguration;
import com.orientechnologies.orient.core.config.OStorageFileConfiguration;
import com.orientechnologies.orient.core.exception.OSerializationException;
import com.orientechnologies.orient.core.serialization.OBinaryProtocol;
import com.orientechnologies.orient.core.storage.ORawBuffer;
import com.orientechnologies.orient.core.storage.OStorage;
import com.orientechnologies.orient.core.storage.fs.OFile;
import com.orientechnologies.orient.core.storage.impl.local.paginated.OLocalPaginatedStorage;
/**
* Handles the database configuration in one big record.
*/
@SuppressWarnings("serial")
public class OStorageConfigurationSegment extends OStorageConfiguration {
private static final int START_SIZE = 10000;
private final OSingleFileSegment segment;
public OStorageConfigurationSegment(final OLocalPaginatedStorage iStorage) throws IOException {
super(iStorage);
segment = new OSingleFileSegment((OLocalPaginatedStorage) storage, new OStorageFileConfiguration(null, getDirectory()
+ "/database.ocf", "classic", fileTemplate.maxSize, fileTemplate.fileIncrementSize));
}
public void close() throws IOException {
segment.close();
}
public void create() throws IOException {
segment.create(START_SIZE);
super.create();
final OFile f = segment.getFile();
if (OGlobalConfiguration.STORAGE_CONFIGURATION_SYNC_ON_UPDATE.getValueAsBoolean())
f.synch();
}
@Override
public OStorageConfiguration load() throws OSerializationException {
try {
if (segment.getFile().exists())
segment.open();
else {
segment.create(START_SIZE);
// @COMPATIBILITY0.9.25
// CHECK FOR OLD VERSION OF DATABASE
final ORawBuffer rawRecord = storage.readRecord(CONFIG_RID, null, false, null, false, OStorage.LOCKING_STRATEGY.DEFAULT)
.getResult();
if (rawRecord != null)
fromStream(rawRecord.buffer);
update();
return this;
}
final int size = segment.getFile().readInt(0);
byte[] buffer = new byte[size];
segment.getFile().read(OBinaryProtocol.SIZE_INT, buffer, size);
fromStream(buffer);
} catch (Exception e) {
throw new OSerializationException("Cannot load database's configuration. The database seems to be corrupted.", e);
}
return this;
}
@Override
public void lock() throws IOException {
if (segment != null)
segment.getFile().lock();
}
@Override
public void unlock() throws IOException {
if (segment != null)
segment.getFile().unlock();
}
@Override
public void update() throws OSerializationException {
try {
final OFile f = segment.getFile();
if (!f.isOpen())
return;
final byte[] buffer = toStream();
final int len = buffer.length + OBinaryProtocol.SIZE_INT;
if (len > f.getFilledUpTo())
f.allocateSpace(len - f.getFilledUpTo());
f.writeInt(0, buffer.length);
f.write(OBinaryProtocol.SIZE_INT, buffer);
if (OGlobalConfiguration.STORAGE_CONFIGURATION_SYNC_ON_UPDATE.getValueAsBoolean())
f.synch();
} catch (Exception e) {
throw new OSerializationException("Error on update storage configuration", e);
}
}
public void synch() throws IOException {
segment.getFile().synch();
}
@Override
public void setSoftlyClosed(boolean softlyClosed) throws IOException {
segment.getFile().setSoftlyClosed(softlyClosed);
}
}