package com.bradmcevoy.http; /** * Resource interface to support quota's * * This must be implemented by Collection (ie Folder) resources if you want to * support quotas * * Resources which implement this can have their quota availability reported to * client applications via the RFC4331 HTTP extensions * * See: http://www.faqs.org/rfcs/rfc4331.html * * Note that these properties may or may not be used in quota checking on PUT. * The PutHandler delegates to a StorageChecker which might be configured to * use a StorageChecker which uses this information. * * @author brad */ public interface QuotaResource extends Resource { /** * From the spec: * * "The DAV:quota-used-bytes value is the value in octets representing the amount of space used by this resource and possibly a number of other similar resources, where the set of "similar" meets at least the criterion that allocating space to any resource in the set will count against the DAV:quota-available-bytes. It MUST include the total count including usage derived from sub-resources if appropriate. It SHOULD include metadata storage size if metadata storage is counted against the DAV:quota-available-bytes. Note that there may be a number of distinct but overlapping sets of resources for which a DAV:quota-used-bytes is maintained (e.g., "all files with a given owner", "all files with a given group owner", etc.). The server is at liberty to choose any of those sets but SHOULD do so in a repeatable way. The rule may be configured per repository. Read more: http://www.faqs.org/rfcs/rfc4331.html#ixzz0bnfikrSE " * * @return - the number of bytes used in this quota allocation, or null * to indicate this information is not available */ Long getQuotaUsed(); /** * From the spec: * The DAV:quota-available-bytes property value is the value in octets representing the amount of additional disk space beyond the current allocation that can be allocated to this resource before further allocations will be refused. It is understood that this space may be consumed by allocations to other resources. Support for this property is REQUIRED on collections, and OPTIONAL on other resources. A server SHOULD implement this property for each resource that has the DAV:quota-used-bytes property. Clients SHOULD expect that as the DAV:quota-available-bytes on a resource approaches 0, further allocations to that resource may be refused. A value of 0 indicates that users will probably not be able to perform operations that write additional information (e.g., a PUT inside a collection), but may be able to replace through overwrite an existing resource of equal size. Read more: http://www.faqs.org/rfcs/rfc4331.html#ixzz0bnfxRSVV * * * @return - the number of bytes used in this quota allocation, or null * to indicate this information is not available */ Long getQuotaAvailable(); }