com.apple.foundationdb.record.provider.foundationdb

Interface FDBLocalityProvider

All Known Implementing Classes:

FDBLocalityUtil

public interface FDBLocalityProvider

An interface containing a set of functions for discovering the location of the keys within a cluster.

See Also:

FDBLocalityUtil, LocalityUtil

Method Summary

Modifier and Type	Method and Description
CloseableAsyncIterator<byte[]>	getBoundaryKeys(Transaction tr, byte[] begin, byte[] end) Return a CloseableAsyncIterator of keys k such that begin <= k < end and k is located at the start of a contiguous range stored on a single server.

Method Detail

getBoundaryKeys

@Nonnull
CloseableAsyncIterator<byte[]> getBoundaryKeys(@Nonnull
                                                        Transaction tr,
                                                        @Nonnull
                                                        byte[] begin,
                                                        @Nonnull
                                                        byte[] end)

Return a CloseableAsyncIterator of keys k such that begin <= k < end and k is located at the start of a contiguous range stored on a single server.

Parameters:

tr - the transaction on which to base the query

begin - the inclusive start of the range

end - the exclusive end of the range

Returns:

a sequence of keys denoting the start of single-server ranges

See Also:

LocalityUtil.getBoundaryKeys(Transaction, byte[], byte[])