/*
* 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 gobblin.source.extractor.utils;
import java.io.Closeable;
import java.io.IOException;
import org.apache.avro.file.SeekableInput;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
/**
* This class provides similar function as {@link org.apache.avro.mapred.FsInput}.
* The difference is that it allows extractor to use customized {@link org.apache.hadoop.fs.FileSystem},
* especially, when file system proxy is enabled.
*
*/
public class ProxyFsInput implements Closeable, SeekableInput {
private final FSDataInputStream stream;
private final long len;
public ProxyFsInput(Path path, FileSystem fs) throws IOException {
this.len = fs.getFileStatus(path).getLen();
this.stream = fs.open(path);
}
@Override
public long length() {
return this.len;
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
return this.stream.read(b, off, len);
}
@Override
public void seek(long p) throws IOException {
this.stream.seek(p);
}
@Override
public long tell() throws IOException {
return this.stream.getPos();
}
@Override
public void close() throws IOException {
this.stream.close();
}
}