@@ -0,0 +1,1119 @@
+/*%0A * Licensed to the University of California, Berkeley under one or more contributor license%0A * agreements. See the NOTICE file distributed with this work for additional information regarding%0A * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the%0A * %22License%22); you may not use this file except in compliance with the License. You may obtain a%0A * copy of the License at%0A * %0A * http://www.apache.org/licenses/LICENSE-2.0%0A * %0A * Unless required by applicable law or agreed to in writing, software distributed under the License%0A * is distributed on an %22AS IS%22 BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express%0A * or implied. See the License for the specific language governing permissions and limitations under%0A * the License.%0A */%0A%0Apackage tachyon.worker.block.allocator;%0A%0Aimport com.google.common.base.Optional;%0A%0Aimport tachyon.worker.block.meta.BlockMeta;%0A%0A/**%0A * Interface for the allocation policy of Tachyon managed data.%0A */%0Apublic interface Allocator %7B%0A  Optional%3CBlockMeta%3E allocateBlock(long userId, long blockId, long blockSize, int tierHint);%0A%7D%0A

Add allocator interface which tells BlockStore how to allocate