/*
* 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.jackrabbit.oak.plugins.mongomk.blob.gridfs;
import java.io.InputStream;
import org.apache.jackrabbit.mk.blobs.BlobStore;
import com.mongodb.DB;
import com.mongodb.gridfs.GridFS;
/**
* Implementation of {@link BlobStore} for MongoDB using GridFS. It does not
* support garbage collection at the moment.
*/
public class MongoGridFSBlobStore implements BlobStore {
private final CommandExecutor commandExecutor;
private final GridFS gridFS;
/**
* Constructs a new {@code BlobStoreMongoGridFS}
*
* @param db The DB.
*/
public MongoGridFSBlobStore(DB db) {
commandExecutor = new DefaultCommandExecutor();
gridFS = new GridFS(db);
}
@Override
public long getBlobLength(String blobId) throws Exception {
Command<Long> command = new GetBlobLengthCommandGridFS(gridFS, blobId);
return commandExecutor.execute(command);
}
@Override
public int readBlob(String blobId, long blobOffset, byte[] buffer, int bufferOffset, int length) throws Exception {
Command<Integer> command = new ReadBlobCommandGridFS(gridFS, blobId, blobOffset,
buffer, bufferOffset, length);
return commandExecutor.execute(command);
}
@Override
public String writeBlob(InputStream is) throws Exception {
Command<String> command = new WriteBlobCommandGridFS(gridFS, is);
return commandExecutor.execute(command);
}
}