/**
* 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.activemq.kaha.impl.async;
import java.io.IOException;
import org.apache.activemq.kaha.Marshaller;
import org.apache.activemq.kaha.StoreLocation;
import org.apache.activemq.kaha.impl.data.RedoListener;
import org.apache.activemq.util.ByteSequence;
import org.apache.activemq.util.DataByteArrayInputStream;
import org.apache.activemq.util.DataByteArrayOutputStream;
/**
* Provides a Kaha DataManager Facade to the DataManager.
*
* @version $Revision: 1.1.1.1 $
*/
public final class DataManagerFacade implements org.apache.activemq.kaha.impl.DataManager {
private static final ByteSequence FORCE_COMMAND = new ByteSequence(new byte[] {'F', 'O', 'R', 'C', 'E'});
private AsyncDataManager dataManager;
private final String name;
private Marshaller redoMarshaller;
private static class StoreLocationFacade implements StoreLocation {
private final Location location;
public StoreLocationFacade(Location location) {
this.location = location;
}
public int getFile() {
return location.getDataFileId();
}
public long getOffset() {
return location.getOffset();
}
public int getSize() {
return location.getSize();
}
public Location getLocation() {
return location;
}
}
public DataManagerFacade(AsyncDataManager dataManager, String name) {
this.dataManager = dataManager;
this.name = name;
}
private static StoreLocation convertToStoreLocation(Location location) {
if (location == null) {
return null;
}
return new StoreLocationFacade(location);
}
private static Location convertFromStoreLocation(StoreLocation location) {
if (location == null) {
return null;
}
if (location.getClass() == StoreLocationFacade.class) {
return ((StoreLocationFacade)location).getLocation();
}
Location l = new Location();
l.setOffset((int)location.getOffset());
l.setSize(location.getSize());
l.setDataFileId(location.getFile());
return l;
}
public Object readItem(Marshaller marshaller, StoreLocation location) throws IOException {
ByteSequence sequence = dataManager.read(convertFromStoreLocation(location));
DataByteArrayInputStream dataIn = new DataByteArrayInputStream(sequence);
return marshaller.readPayload(dataIn);
}
public StoreLocation storeDataItem(Marshaller marshaller, Object payload) throws IOException {
final DataByteArrayOutputStream buffer = new DataByteArrayOutputStream();
marshaller.writePayload(payload, buffer);
ByteSequence data = buffer.toByteSequence();
return convertToStoreLocation(dataManager.write(data, (byte)1, false));
}
public void force() throws IOException {
dataManager.write(FORCE_COMMAND, (byte)2, true);
}
public void updateItem(StoreLocation location, Marshaller marshaller, Object payload) throws IOException {
final DataByteArrayOutputStream buffer = new DataByteArrayOutputStream();
marshaller.writePayload(payload, buffer);
ByteSequence data = buffer.toByteSequence();
dataManager.update(convertFromStoreLocation(location), data, false);
}
public void close() throws IOException {
dataManager.close();
}
public void consolidateDataFiles() throws IOException {
dataManager.consolidateDataFiles();
}
public boolean delete() throws IOException {
return dataManager.delete();
}
public void addInterestInFile(int file) throws IOException {
dataManager.addInterestInFile(file);
}
public void removeInterestInFile(int file) throws IOException {
dataManager.removeInterestInFile(file);
}
public void recoverRedoItems(RedoListener listener) throws IOException {
throw new RuntimeException("Not Implemented..");
}
public StoreLocation storeRedoItem(Object payload) throws IOException {
throw new RuntimeException("Not Implemented..");
}
public Marshaller getRedoMarshaller() {
return redoMarshaller;
}
public void setRedoMarshaller(Marshaller redoMarshaller) {
this.redoMarshaller = redoMarshaller;
}
public String getName() {
return name;
}
}