/* $HeadURL$
* $Id$
*
* Copyright (c) 2009-2010 DuraSpace
* http://duraspace.org
*
* In collaboration with Topaz Inc.
* http://www.topazproject.org
*
* 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.
*/
package org.akubraproject.mem;
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import javax.transaction.Transaction;
import org.akubraproject.BlobStoreConnection;
import org.akubraproject.impl.AbstractBlobStore;
import org.akubraproject.impl.StreamManager;
/**
* Simple in-memory blob store.
*
* @author Ronald Tschalär
*/
public class MemBlobStore extends AbstractBlobStore {
private static final Random rng = new Random();
private final Map<URI, MemData> blobs = new HashMap<URI, MemData>();
private final StreamManager streamMgr = new StreamManager();
/**
* Create a new, random ID with the given prefix.
*
* @param prefix the URI prefix to use
* @return the new ID
*/
static synchronized URI getRandomId(String prefix) {
return URI.create(prefix + rng.nextLong());
}
/**
* Create a new blob-store with a random id.
*/
public MemBlobStore() {
this(getRandomId("urn:mem-blob-store:"));
}
/**
* Create a new blob-store.
*
* @param id the store id
*/
public MemBlobStore(URI id) {
super(id);
}
@Override
public BlobStoreConnection openConnection(Transaction tx, Map<String, String> hints)
throws UnsupportedOperationException {
if (tx != null)
throw new UnsupportedOperationException("MemBlobStore does not support transactions");
return new MemConnection(this, blobs, streamMgr);
}
}