hadoop RawLocalFs 源码
haddop RawLocalFs 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/local/RawLocalFs.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.fs.local;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.AbstractFileSystem;
import org.apache.hadoop.fs.DelegateToFileSystem;
import org.apache.hadoop.fs.FsConstants;
import org.apache.hadoop.fs.FsServerDefaults;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.RawLocalFileSystem;
/**
* The RawLocalFs implementation of AbstractFileSystem.
* This impl delegates to the old FileSystem
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving /*Evolving for a release,to be changed to Stable */
public class RawLocalFs extends DelegateToFileSystem {
RawLocalFs(final Configuration conf) throws IOException, URISyntaxException {
this(FsConstants.LOCAL_FS_URI, conf);
}
/**
* This constructor has the signature needed by
* {@link AbstractFileSystem#createFileSystem(URI, Configuration)}.
*
* @param theUri which must be that of localFs
* @param conf
* @throws IOException
* @throws URISyntaxException
*/
RawLocalFs(final URI theUri, final Configuration conf) throws IOException,
URISyntaxException {
super(theUri, new RawLocalFileSystem(), conf,
FsConstants.LOCAL_FS_URI.getScheme(), false);
}
@Override
public int getUriDefaultPort() {
return -1; // No default port for file:///
}
@Override
public FsServerDefaults getServerDefaults(final Path f)
throws IOException {
return LocalConfigKeys.getServerDefaults();
}
@Override
@Deprecated
public FsServerDefaults getServerDefaults() throws IOException {
return LocalConfigKeys.getServerDefaults();
}
@Override
public boolean isValidName(String src) {
// Different local file systems have different validation rules. Skip
// validation here and just let the OS handle it. This is consistent with
// RawLocalFileSystem.
return true;
}
}
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