Package org.apache.hadoop.hdfs.server.federation.router

Class RouterQuotaManager

java.lang.Object

org.apache.hadoop.hdfs.server.federation.router.RouterQuotaManager

public class RouterQuotaManager
extends java.lang.Object

Router quota manager in Router. The manager maintains RouterQuotaUsage cache of mount tables and do management for the quota caches.

Constructor Summary

Constructors

Constructor	Description
RouterQuotaManager()

Method Summary

Modifier and Type	Method	Description
void	clear()	Clean up the cache.
java.util.Set<java.lang.String>	getAll()	Get all the mount quota paths.
java.util.Set<java.lang.String>	getPaths(java.lang.String parentPath)	Get children paths (can include itself) under specified federation path.
RouterQuotaUsage	getQuotaUsage(java.lang.String path)	Get the nearest ancestor's quota usage, and meanwhile its quota was set.
static boolean	isQuotaSet(org.apache.hadoop.fs.QuotaUsage quota)	Check if the quota was set.
void	put(java.lang.String path, RouterQuotaUsage quotaUsage)	Put new entity into cache.
void	remove(java.lang.String path)	Remove the entity from cache.
void	updateQuota(java.lang.String path, RouterQuotaUsage quota)	Update quota in cache.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RouterQuotaManager

public RouterQuotaManager()

Method Detail

getAll

public java.util.Set<java.lang.String> getAll()

Get all the mount quota paths.

Returns:

All the mount quota paths.

getQuotaUsage

public RouterQuotaUsage getQuotaUsage(java.lang.String path)

Get the nearest ancestor's quota usage, and meanwhile its quota was set.

Parameters:

path - The path being written.

Returns:

RouterQuotaUsage Quota usage.

getPaths

public java.util.Set<java.lang.String> getPaths(java.lang.String parentPath)

Get children paths (can include itself) under specified federation path.

Parameters:

parentPath - Federated path.

Returns:

Set of children paths.

put

public void put(java.lang.String path,
                RouterQuotaUsage quotaUsage)

Put new entity into cache.

Parameters:

path - Mount table path.

quotaUsage - Corresponding cache value.

updateQuota

public void updateQuota(java.lang.String path,
                        RouterQuotaUsage quota)

Update quota in cache. The usage will be preserved.

Parameters:

path - Mount table path.

quota - Corresponding quota value.

remove

public void remove(java.lang.String path)

Remove the entity from cache.

Parameters:

path - Mount table path.

clear

public void clear()

Clean up the cache.

isQuotaSet

public static boolean isQuotaSet(org.apache.hadoop.fs.QuotaUsage quota)

Check if the quota was set.

Parameters:

quota - the quota usage.

Returns:

True if the quota is set.