public interface DataCache
| Modifier and Type | Interface and Description | 
|---|---|
| static class  | DataCache.BooleanRef | 
| static interface  | DataCache.DiskRangeListFactoryDisk range factory used during cache retrieval. | 
| Modifier and Type | Method and Description | 
|---|---|
| Allocator | getAllocator()Gets the allocator associated with this DataCache. | 
| DiskRangeList | getFileData(Object fileKey,
           DiskRangeList range,
           long baseOffset,
           DataCache.DiskRangeListFactory factory,
           DataCache.BooleanRef gotAllData)Gets file data for particular offsets. | 
| long[] | putFileData(Object fileKey,
           DiskRange[] ranges,
           MemoryBuffer[] data,
           long baseOffset)Puts file data into cache, or gets older data in case of collisions. | 
| void | releaseBuffer(MemoryBuffer buffer)Releases the buffer returned by getFileData/provided to putFileData back to cache. | 
| void | reuseBuffer(MemoryBuffer buffer)Notifies the cache that the buffer returned from getFileData/provided to putFileData will
 be used by another consumer and therefore released multiple times (one more time per call). | 
DiskRangeList getFileData(Object fileKey, DiskRangeList range, long baseOffset, DataCache.DiskRangeListFactory factory, DataCache.BooleanRef gotAllData)
fileKey - Unique ID of the target file on the file system.range - A set of DiskRange-s (linked list) that is to be retrieved. May be modified.baseOffset - base offset for the ranges (stripe/stream offset in case of ORC).factory - A factory to produce DiskRangeList-s out of cached MemoryBuffer-s.gotAllData - An out param - whether all the requested data was found in cache.long[] putFileData(Object fileKey, DiskRange[] ranges, MemoryBuffer[] data, long baseOffset)
fileKey - Unique ID of the target file on the file system.ranges - The ranges for which the data is being cached. These objects will not be stored.data - The data for the corresponding ranges.baseOffset - base offset for the ranges (stripe/stream offset in case of ORC).void releaseBuffer(MemoryBuffer buffer)
void reuseBuffer(MemoryBuffer buffer)
Allocator getAllocator()
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