| /* |
| * 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.parquet.hadoop.util; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.parquet.io.OutputFile; |
| import org.apache.parquet.io.PositionOutputStream; |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| public class HadoopOutputFile implements OutputFile { |
| // need to supply a buffer size when setting block size. this is the default |
| // for hadoop 1 to present. copying it avoids loading DFSConfigKeys. |
| private static final int DFS_BUFFER_SIZE_DEFAULT = 4096; |
| |
| private static final Set<String> BLOCK_FS_SCHEMES = new HashSet<String>(); |
| static { |
| BLOCK_FS_SCHEMES.add("hdfs"); |
| BLOCK_FS_SCHEMES.add("webhdfs"); |
| BLOCK_FS_SCHEMES.add("viewfs"); |
| } |
| |
| // visible for testing |
| public static Set<String> getBlockFileSystems() { |
| return BLOCK_FS_SCHEMES; |
| } |
| |
| private static boolean supportsBlockSize(FileSystem fs) { |
| return BLOCK_FS_SCHEMES.contains(fs.getUri().getScheme()); |
| } |
| |
| private final FileSystem fs; |
| private final Path path; |
| private final Configuration conf; |
| |
| public static HadoopOutputFile fromPath(Path path, Configuration conf) |
| throws IOException { |
| FileSystem fs = path.getFileSystem(conf); |
| return new HadoopOutputFile(fs, fs.makeQualified(path), conf); |
| } |
| |
| private HadoopOutputFile(FileSystem fs, Path path, Configuration conf) { |
| this.fs = fs; |
| this.path = path; |
| this.conf = conf; |
| } |
| |
| public Configuration getConfiguration() { |
| return conf; |
| } |
| |
| @Override |
| public PositionOutputStream create(long blockSizeHint) throws IOException { |
| return HadoopStreams.wrap(fs.create(path, false /* do not overwrite */, |
| DFS_BUFFER_SIZE_DEFAULT, fs.getDefaultReplication(path), |
| Math.max(fs.getDefaultBlockSize(path), blockSizeHint))); |
| } |
| |
| @Override |
| public PositionOutputStream createOrOverwrite(long blockSizeHint) throws IOException { |
| return HadoopStreams.wrap(fs.create(path, true /* overwrite if exists */, |
| DFS_BUFFER_SIZE_DEFAULT, fs.getDefaultReplication(path), |
| Math.max(fs.getDefaultBlockSize(path), blockSizeHint))); |
| } |
| |
| @Override |
| public boolean supportsBlockSize() { |
| return supportsBlockSize(fs); |
| } |
| |
| @Override |
| public long defaultBlockSize() { |
| return fs.getDefaultBlockSize(path); |
| } |
| |
| @Override |
| public String getPath() { |
| return toString(); |
| } |
| |
| @Override |
| public String toString() { |
| return path.toString(); |
| } |
| } |