Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/**
* 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.viewfs;
import java.net.URI;
import java.util.Arrays;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.util.StringUtils;
/**
* Utilities for config variables of the viewFs See {@link ViewFs}
*/
public class ConfigUtil {
/**
* Get the config variable prefix for the specified mount table
* @param mountTableName - the name of the mount table
* @return the config variable prefix for the specified mount table
*/
public static String getConfigViewFsPrefix(final String mountTableName) {
return Constants.CONFIG_VIEWFS_PREFIX + "." + mountTableName;
}
/**
* Get the config variable prefix for the default mount table
* @return the config variable prefix for the default mount table
*/
public static String getConfigViewFsPrefix() {
return
getConfigViewFsPrefix(Constants.CONFIG_VIEWFS_PREFIX_DEFAULT_MOUNT_TABLE);
}
/**
* Add a link to the config for the specified mount table
* @param conf - add the link to this conf
* @param mountTableName
* @param src - the src path name
* @param target - the target URI link
*/
public static void addLink(Configuration conf, final String mountTableName,
final String src, final URI target) {
conf.set(getConfigViewFsPrefix(mountTableName) + "." +
Constants.CONFIG_VIEWFS_LINK + "." + src, target.toString());
}
/**
* Add a link to the config for the default mount table
* @param conf - add the link to this conf
* @param src - the src path name
* @param target - the target URI link
*/
public static void addLink(final Configuration conf, final String src,
final URI target) {
addLink(conf, getDefaultMountTableName(conf), src, target);
}
/**
* Add a LinkMergeSlash to the config for the specified mount table.
* @param conf
* @param mountTableName
* @param target
*/
public static void addLinkMergeSlash(Configuration conf,
final String mountTableName, final URI target) {
conf.set(getConfigViewFsPrefix(mountTableName) + "." +
Constants.CONFIG_VIEWFS_LINK_MERGE_SLASH, target.toString());
}
/**
* Add a LinkMergeSlash to the config for the default mount table.
* @param conf
* @param target
*/
public static void addLinkMergeSlash(Configuration conf, final URI target) {
addLinkMergeSlash(conf, getDefaultMountTableName(conf), target);
}
/**
* Add a LinkFallback to the config for the specified mount table.
* @param conf
* @param mountTableName
* @param target
*/
public static void addLinkFallback(Configuration conf,
final String mountTableName, final URI target) {
conf.set(getConfigViewFsPrefix(mountTableName) + "." +
Constants.CONFIG_VIEWFS_LINK_FALLBACK, target.toString());
}
/**
* Add a LinkFallback to the config for the default mount table.
* @param conf
* @param target
*/
public static void addLinkFallback(Configuration conf, final URI target) {
addLinkFallback(conf, getDefaultMountTableName(conf), target);
}
/**
* Add a LinkMerge to the config for the specified mount table.
* @param conf
* @param mountTableName
* @param targets
*/
public static void addLinkMerge(Configuration conf,
final String mountTableName, final URI[] targets) {
conf.set(getConfigViewFsPrefix(mountTableName) + "." +
Constants.CONFIG_VIEWFS_LINK_MERGE, Arrays.toString(targets));
}
/**
* Add a LinkMerge to the config for the default mount table.
* @param conf
* @param targets
*/
public static void addLinkMerge(Configuration conf, final URI[] targets) {
addLinkMerge(conf, getDefaultMountTableName(conf), targets);
}
/**
* Add nfly link to configuration for the given mount table.
*/
public static void addLinkNfly(Configuration conf, String mountTableName,
String src, String settings, final String targets) {
conf.set(
getConfigViewFsPrefix(mountTableName) + "."
+ Constants.CONFIG_VIEWFS_LINK_NFLY + "." + settings + "." + src,
targets);
}
/**
*
* @param conf
* @param mountTableName
* @param src
* @param settings
* @param targets
*/
public static void addLinkNfly(Configuration conf, String mountTableName,
String src, String settings, final URI ... targets) {
settings = settings == null
? "minReplication=2,repairOnRead=true"
: settings;
addLinkNfly(conf, mountTableName, src, settings,
StringUtils.uriToString(targets));
}
public static void addLinkNfly(final Configuration conf, final String src,
final URI ... targets) {
addLinkNfly(conf, getDefaultMountTableName(conf), src, null, targets);
}
/**
* Add a LinkRegex to the config for the specified mount table.
* @param conf - get mountable config from this conf
* @param mountTableName - the mountable name of the regex config item
* @param srcRegex - the src path regex expression that applies to this config
* @param targetStr - the string of target path
* @param interceptorSettings - the serialized interceptor string to be
* applied while resolving the mapping
*/
public static void addLinkRegex(
Configuration conf, final String mountTableName, final String srcRegex,
final String targetStr, final String interceptorSettings) {
String prefix = getConfigViewFsPrefix(mountTableName) + "."
+ Constants.CONFIG_VIEWFS_LINK_REGEX + ".";
if ((interceptorSettings != null) && (!interceptorSettings.isEmpty())) {
prefix = prefix + interceptorSettings
+ RegexMountPoint.SETTING_SRCREGEX_SEP;
}
String key = prefix + srcRegex;
conf.set(key, targetStr);
}
/**
* Add config variable for homedir for default mount table
* @param conf - add to this conf
* @param homedir - the home dir path starting with slash
*/
public static void setHomeDirConf(final Configuration conf,
final String homedir) {
setHomeDirConf(conf, getDefaultMountTableName(conf), homedir);
}
/**
* Add config variable for homedir the specified mount table
* @param conf - add to this conf
* @param homedir - the home dir path starting with slash
*/
public static void setHomeDirConf(final Configuration conf,
final String mountTableName, final String homedir) {
if (!homedir.startsWith("/")) {
throw new IllegalArgumentException("Home dir should start with /:"
+ homedir);
}
conf.set(getConfigViewFsPrefix(mountTableName) + "." +
Constants.CONFIG_VIEWFS_HOMEDIR, homedir);
}
/**
* Get the value of the home dir conf value for default mount table
* @param conf - from this conf
* @return home dir value, null if variable is not in conf
*/
public static String getHomeDirValue(final Configuration conf) {
return getHomeDirValue(conf, getDefaultMountTableName(conf));
}
/**
* Get the value of the home dir conf value for specified mount table
* @param conf - from this conf
* @param mountTableName - the mount table
* @return home dir value, null if variable is not in conf
*/
public static String getHomeDirValue(final Configuration conf,
final String mountTableName) {
return conf.get(getConfigViewFsPrefix(mountTableName) + "." +
Constants.CONFIG_VIEWFS_HOMEDIR);
}
/**
* Get the name of the default mount table to use. If
* {@link Constants#CONFIG_VIEWFS_DEFAULT_MOUNT_TABLE_NAME_KEY} is specified,
* it's value is returned. Otherwise,
* {@link Constants#CONFIG_VIEWFS_DEFAULT_MOUNT_TABLE} is returned.
*
* @param conf Configuration to use.
* @return the name of the default mount table to use.
*/
public static String getDefaultMountTableName(final Configuration conf) {
return conf.get(Constants.CONFIG_VIEWFS_DEFAULT_MOUNT_TABLE_NAME_KEY,
Constants.CONFIG_VIEWFS_DEFAULT_MOUNT_TABLE);
}
}
