| /* |
| * 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.iotdb.hadoop.fileSystem; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.ChecksumFileSystem; |
| import org.apache.hadoop.fs.FSDataInputStream; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.tsfile.read.reader.TsFileInput; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.nio.ByteBuffer; |
| |
| public class HDFSInput implements TsFileInput { |
| |
| private FSDataInputStream fsDataInputStream; |
| private FileSystem fs; |
| private Path path; |
| |
| public HDFSInput(String filePath) throws IOException { |
| this(new Path(filePath), new Configuration()); |
| } |
| |
| public HDFSInput(String filePath, Configuration configuration) throws IOException { |
| this(new Path(filePath), configuration); |
| } |
| |
| public HDFSInput(Path path, Configuration configuration) throws IOException { |
| this.fs = path.getFileSystem(configuration); |
| this.path = path; |
| this.fsDataInputStream = fs.open(path); |
| } |
| |
| @Override |
| public long size() throws IOException { |
| return fs.getFileStatus(path).getLen(); |
| } |
| |
| @Override |
| public long position() throws IOException { |
| return fsDataInputStream.getPos(); |
| } |
| |
| @Override |
| public synchronized TsFileInput position(long newPosition) throws IOException { |
| fsDataInputStream.seek(newPosition); |
| return this; |
| } |
| |
| @Override |
| public synchronized int read(ByteBuffer dst) throws IOException { |
| int res; |
| if (fs instanceof ChecksumFileSystem) { |
| byte[] bytes = new byte[dst.remaining()]; |
| res = fsDataInputStream.read(bytes); |
| dst.put(bytes); |
| } else { |
| res = fsDataInputStream.read(dst); |
| } |
| return res; |
| } |
| |
| @Override |
| public synchronized int read(ByteBuffer dst, long position) throws IOException { |
| if (position < 0) { |
| throw new IllegalArgumentException("position must be non-negative"); |
| } |
| |
| if (position >= this.size()) { |
| return -1; |
| } |
| |
| long srcPosition = fsDataInputStream.getPos(); |
| |
| fsDataInputStream.seek(position); |
| int res = read(dst); |
| fsDataInputStream.seek(srcPosition); |
| |
| return res; |
| } |
| |
| @Override |
| public InputStream wrapAsInputStream() { |
| return fsDataInputStream; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| fsDataInputStream.close(); |
| } |
| |
| @Override |
| public String getFilePath() { |
| return path.toString(); |
| } |
| } |