/*
* Copyright 2008-2009 LinkedIn, Inc
*
* 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 voldemort.store.gzip;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.GZIPInputStream;
import org.apache.commons.io.IOUtils;
import voldemort.VoldemortException;
import voldemort.store.DelegatingStore;
import voldemort.store.Store;
import voldemort.versioning.Versioned;
/**
* A Store decorator that gzips and ungzips its contents as it stores them
*
*
*/
public class GzipStore<K> extends DelegatingStore<K, byte[], byte[]> {
public GzipStore(Store<K, byte[], byte[]> innerStore) {
super(innerStore);
}
@Override
public List<Versioned<byte[]>> get(K key, byte[] transforms) throws VoldemortException {
List<Versioned<byte[]>> found = getInnerStore().get(key, transforms);
List<Versioned<byte[]>> results = new ArrayList<Versioned<byte[]>>(found.size());
try {
for(Versioned<byte[]> item: found)
results.add(new Versioned<byte[]>(IOUtils.toByteArray(new GZIPInputStream(new ByteArrayInputStream(item.getValue()))),
item.getVersion()));
} catch(IOException e) {
throw new VoldemortException(e);
}
return results;
}
@Override
public void put(K key, Versioned<byte[]> value, byte[] transforms) throws VoldemortException {
try {
getInnerStore().put(key,
new Versioned<byte[]>(IOUtils.toByteArray(new GZIPInputStream(new ByteArrayInputStream(value.getValue()))),
value.getVersion()),
transforms);
} catch(IOException e) {
throw new VoldemortException(e);
}
}
}