hadoop HttpFSReleaseFilter 源码
haddop HttpFSReleaseFilter 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-httpfs/src/main/java/org/apache/hadoop/fs/http/server/HttpFSReleaseFilter.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.http.server;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.lib.service.FileSystemAccess;
import org.apache.hadoop.lib.servlet.FileSystemReleaseFilter;
/**
* Filter that releases FileSystemAccess filesystem instances upon HTTP request
* completion.
*/
@InterfaceAudience.Private
public class HttpFSReleaseFilter extends FileSystemReleaseFilter {
/**
* Returns the {@link FileSystemAccess} service to return the FileSystemAccess filesystem
* instance to.
*
* @return the FileSystemAccess service.
*/
@Override
protected FileSystemAccess getFileSystemAccess() {
return HttpFSServerWebApp.get().get(FileSystemAccess.class);
}
}
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