| /* |
| * 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.iotdb.tsfile.write.writer.TsFileOutput; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.nio.ByteBuffer; |
| |
| /** |
| * This class is used to wrap the {@link}FSDataOutputStream and implement the interface |
| * {@link}TsFileOutput |
| */ |
| public class HDFSOutput implements TsFileOutput { |
| |
| private FSDataOutputStream fsDataOutputStream; |
| private FileSystem fs; |
| private Path path; |
| |
| public HDFSOutput(String filePath, boolean overwrite) throws IOException { |
| this(filePath, new Configuration(), overwrite); |
| path = new Path(filePath); |
| } |
| |
| public HDFSOutput(String filePath, Configuration configuration, boolean overwrite) |
| throws IOException { |
| this(new Path(filePath), configuration, overwrite); |
| path = new Path(filePath); |
| } |
| |
| public HDFSOutput(Path path, Configuration configuration, boolean overwrite) throws IOException { |
| fs = path.getFileSystem(HDFSConfUtil.setConf(configuration)); |
| fsDataOutputStream = fs.exists(path) ? fs.append(path) : fs.create(path, overwrite); |
| this.path = path; |
| } |
| |
| @Override |
| public void write(byte[] b) throws IOException { |
| fsDataOutputStream.write(b); |
| } |
| |
| @Override |
| public void write(byte b) throws IOException { |
| fsDataOutputStream.write(b); |
| } |
| |
| @Override |
| public void write(ByteBuffer b) { |
| throw new UnsupportedOperationException("Unsupported operation."); |
| } |
| |
| @Override |
| public long getPosition() throws IOException { |
| return fsDataOutputStream.getPos(); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| fsDataOutputStream.close(); |
| } |
| |
| @Override |
| public OutputStream wrapAsStream() { |
| return fsDataOutputStream; |
| } |
| |
| @Override |
| public void flush() throws IOException { |
| this.fsDataOutputStream.hflush(); |
| } |
| |
| @Override |
| public void truncate(long size) throws IOException { |
| if (fs.exists(path)) { |
| fsDataOutputStream.close(); |
| } |
| fs.truncate(path, size); |
| if (fs.exists(path)) { |
| fsDataOutputStream = fs.append(path); |
| } |
| } |
| |
| @Override |
| public void force() throws IOException { |
| // do nothing |
| } |
| } |