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 */ 018package org.apache.hadoop.fs; 019 020import java.net.URI; 021 022import org.apache.hadoop.classification.InterfaceAudience; 023import org.apache.hadoop.classification.InterfaceStability; 024 025/** 026 * FileSystem related constants. 027 */ 028@InterfaceAudience.Public 029@InterfaceStability.Stable 030public interface FsConstants { 031 // URI for local filesystem 032 public static final URI LOCAL_FS_URI = URI.create("file:///"); 033 034 // URI scheme for FTP 035 public static final String FTP_SCHEME = "ftp"; 036 037 // Maximum number of symlinks to recursively resolve in a path 038 static final int MAX_PATH_LINKS = 32; 039 040 /** 041 * ViewFs: viewFs file system (ie the mount file system on client side) 042 */ 043 public static final URI VIEWFS_URI = URI.create("viewfs:///"); 044 public static final String VIEWFS_SCHEME = "viewfs"; 045}