| /** |
| * 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 com.datatorrent.lib.io.block; |
| |
| import org.apache.hadoop.fs.Path; |
| |
| import com.datatorrent.api.Context; |
| import com.datatorrent.api.StatsListener; |
| import com.datatorrent.netlet.util.Slice; |
| |
| /** |
| * An {@link AbstractFSBlockReader} which emits fixed-size byte-arrays wrapped in {@link Slice}.<br/> |
| * |
| * @category Input |
| * @tags fs |
| * |
| * @since 2.1.0 |
| */ |
| @StatsListener.DataQueueSize |
| public class FSSliceReader extends AbstractFSBlockReader<Slice> |
| { |
| public FSSliceReader() |
| { |
| super(); |
| this.readerContext = new ReaderContext.FixedBytesReaderContext<>(); |
| } |
| |
| @Override |
| public void setup(Context.OperatorContext context) |
| { |
| super.setup(context); |
| if (basePath != null && this.readerContext instanceof ReaderContext.FixedBytesReaderContext) { |
| ((ReaderContext.FixedBytesReaderContext)this.readerContext).setLength((int)fs.getDefaultBlockSize(new Path(basePath))); |
| } |
| } |
| |
| @Override |
| protected Slice convertToRecord(byte[] bytes) |
| { |
| return new Slice(bytes); |
| } |
| } |