org.apache.solr.store.hdfs.HdfsFileWriter Maven / Gradle / Ivy
/*
* 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.solr.store.hdfs;
import java.io.IOException;
import java.io.OutputStream;
import java.util.EnumSet;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.CreateFlag;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FsServerDefaults;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.lucene.store.OutputStreamIndexOutput;
/**
* @lucene.experimental
*/
public class HdfsFileWriter extends OutputStreamIndexOutput {
public static final String HDFS_SYNC_BLOCK = "solr.hdfs.sync.block";
public static final int BUFFER_SIZE = 16384;
public HdfsFileWriter(FileSystem fileSystem, Path path, String name) throws IOException {
super("fileSystem=" + fileSystem + " path=" + path, name, getOutputStream(fileSystem, path), BUFFER_SIZE);
}
private static final OutputStream getOutputStream(FileSystem fileSystem, Path path) throws IOException {
Configuration conf = fileSystem.getConf();
FsServerDefaults fsDefaults = fileSystem.getServerDefaults(path);
short replication = fileSystem.getDefaultReplication(path);
EnumSet flags = EnumSet.of(CreateFlag.CREATE,
CreateFlag.OVERWRITE);
if (Boolean.getBoolean(HDFS_SYNC_BLOCK)) {
flags.add(CreateFlag.SYNC_BLOCK);
}
return fileSystem.create(path, FsPermission.getDefault()
.applyUMask(FsPermission.getUMask(conf)), flags, fsDefaults
.getFileBufferSize(), replication, fsDefaults
.getBlockSize(), null);
}
}