/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.openejb.core.stateful;
import org.apache.openejb.SystemException;
import org.apache.openejb.spi.Serializer;
import java.io.File;
import java.io.RandomAccessFile;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
public class RAFPassivater implements PassivationStrategy {
int fileID;
HashMap masterTable = new HashMap();
static class Pointer {
int fileid;
long filepointer;
int bytesize;
public Pointer(final int file, final long pointer, final int bytecount) {
fileid = file;
filepointer = pointer;
bytesize = bytecount;
}
}
@Override
public void init(final Properties props) throws SystemException {
}
@Override
public synchronized void passivate(final Map stateTable)
throws SystemException {
try {
fileID++;
final RandomAccessFile ras = new RandomAccessFile(System.getProperty("java.io.tmpdir", File.separator + "tmp") + File.separator + "passivation" + fileID + ".ser", "rw");
final Iterator iterator = stateTable.keySet().iterator();
Pointer lastPointer = null;
while (iterator.hasNext()) {
final Object id = iterator.next();
final Object obj = stateTable.get(id);
final byte[] bytes = Serializer.serialize(obj);
final long filepointer = ras.getFilePointer();
if (lastPointer == null) {
lastPointer = new Pointer(fileID, filepointer, (int) filepointer);
} else {
lastPointer = new Pointer(fileID, filepointer, (int) (filepointer - lastPointer.filepointer));
}
masterTable.put(id, lastPointer);
ras.write(bytes);
}
ras.close();
} catch (final Exception e) {
throw new SystemException(e);
}
}
@Override
public synchronized Object activate(final Object primaryKey)
throws SystemException {
final Pointer pointer = (Pointer) masterTable.get(primaryKey);
if (pointer == null) {
return null;
}
try {
final RandomAccessFile ras = new RandomAccessFile(System.getProperty("java.io.tmpdir", File.separator + "tmp") + File.separator + "passivation" + pointer.fileid + ".ser", "r");
final byte[] bytes = new byte[(int) pointer.bytesize];
ras.seek(pointer.filepointer);
ras.readFully(bytes);
ras.close();
return Serializer.deserialize(bytes);
} catch (final Exception e) {
throw new SystemException(e);
}
}
}