001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019 package org.apache.hadoop.fs.http.server; 020 021 import org.apache.hadoop.classification.InterfaceAudience; 022 import org.apache.hadoop.lib.service.FileSystemAccess; 023 import org.apache.hadoop.lib.servlet.FileSystemReleaseFilter; 024 025 /** 026 * Filter that releases FileSystemAccess filesystem instances upon HTTP request 027 * completion. 028 */ 029 @InterfaceAudience.Private 030 public class HttpFSReleaseFilter extends FileSystemReleaseFilter { 031 032 /** 033 * Returns the {@link FileSystemAccess} service to return the FileSystemAccess filesystem 034 * instance to. 035 * 036 * @return the FileSystemAccess service. 037 */ 038 @Override 039 protected FileSystemAccess getFileSystemAccess() { 040 return HttpFSServerWebApp.get().get(FileSystemAccess.class); 041 } 042 043 }