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HDFS-13948: provide Regex Based Mount Point In Inode Tree #424

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HDFS-13948: provide Regex Based Mount Point In Inode Tree #424

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35 changes: 35 additions & 0 deletions ...op-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/ConfigUtil.java
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Original file line number Diff line number Diff line change
Expand Up @@ -161,6 +161,41 @@ public static void addLinkNfly(final Configuration conf, final String src,
targets);
}


/**
* Add a LinkRegex to the config for the specified mount table.
* @param conf
* @param mountTableName
* @param srcRegex
* @param targetStr
*/
public static void addLinkRegex(
Configuration conf, final String mountTableName,
final String srcRegex, final String targetStr) {
addLinkRegex(conf, mountTableName, srcRegex, targetStr, null);
}

/**
* Add a LinkRegex to the config for the specified mount table.
* @param conf
* @param mountTableName
* @param srcRegex
* @param targetStr
* @param interceptorSettings
*/
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
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16 changes: 16 additions & 0 deletions hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/Constants.java
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Expand Up @@ -75,7 +75,23 @@ public interface Constants {
*/
String CONFIG_VIEWFS_LINK_MERGE_SLASH = "linkMergeSlash";

/**
* Config variable for specifying a regex link which uses regular expressions
* as source and target could use group captured in src.
* E.g. (^/(?<firstDir>\\w+), /prefix-${firstDir}) =>
* (/path1/file1 => /prefix-path1/file1)
*/
String CONFIG_VIEWFS_LINK_REGEX = "linkRegex";

FsPermission PERMISSION_555 = new FsPermission((short) 0555);

String CONFIG_VIEWFS_RENAME_STRATEGY = "fs.viewfs.rename.strategy";

/**
* Config capacity of mount point resolution cache.
* Value <= 0 means disable cache.
*/
String CONFIG_VIEWFS_PATH_RESOLUTION_CACHE_CAPACITY
= "fs.viewfs.path.resolution.cache.capacity";
int CONFIG_VIEWFS_PATH_RESOLUTION_CACHE_CAPACITY_DEFAULT = 0;
}
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