hadoop DefaultInputDemuxer 源码
haddop DefaultInputDemuxer 代码
文件路径：/hadoop-tools/hadoop-rumen/src/main/java/org/apache/hadoop/tools/rumen/DefaultInputDemuxer.java
/**
* 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.hadoop.tools.rumen;
import java.io.IOException;
import java.io.InputStream;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
/**
* {@link DefaultInputDemuxer} acts as a pass-through demuxer. It just opens
* each file and returns back the input stream. If the input is compressed, it
* would return a decompression stream.
*/
public class DefaultInputDemuxer implements InputDemuxer {
String name;
InputStream input;
@Override
public void bindTo(Path path, Configuration conf) throws IOException {
if (name != null) { // re-binding before the previous one was consumed.
close();
}
name = path.getName();
input = new PossiblyDecompressedInputStream(path, conf);
return;
}
@Override
public Pair<String, InputStream> getNext() throws IOException {
if (name != null) {
Pair<String, InputStream> ret =
new Pair<String, InputStream>(name, input);
name = null;
input = null;
return ret;
}
return null;
}
@Override
public void close() throws IOException {
try {
if (input != null) {
input.close();
}
} finally {
name = null;
input = null;
}
}
}
相关信息
相关文章
hadoop AbstractClusterStory 源码
hadoop CDFPiecewiseLinearRandomGenerator 源码
hadoop ClusterTopologyReader 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦