Package com.apple.foundationdb.clientlog

Class VersionFromTimestamp

java.lang.Object

com.apple.foundationdb.clientlog.VersionFromTimestamp

@API(EXPERIMENTAL)
public class VersionFromTimestamp
extends Object

Map from wall-clock time to transaction time.

Method Summary

Modifier and Type	Method	Description
static CompletableFuture<Long>	lastVersionBefore(ReadTransaction tr, Instant timestamp)	Get the last version from the timekeeper at or before the given timestamp.
static CompletableFuture<Long>	nextVersionAfter(ReadTransaction tr, Instant timestamp)	Get the first version from the timekeeper at or after the given timestamp.

Methods inherited from class java.lang.Object

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

Method Detail

lastVersionBefore

@Nonnull
public static CompletableFuture<Long> lastVersionBefore(@Nonnull
                                                        ReadTransaction tr,
                                                        @Nonnull
                                                        Instant timestamp)

Get the last version from the timekeeper at or before the given timestamp.

Parameters:

tr - an open transaction

timestamp - the wall-clock time

Returns:

a future that completes with the recorded version that comes immediately before the target time

nextVersionAfter

@Nonnull
public static CompletableFuture<Long> nextVersionAfter(@Nonnull
                                                       ReadTransaction tr,
                                                       @Nonnull
                                                       Instant timestamp)

Get the first version from the timekeeper at or after the given timestamp.

Parameters:

tr - an open transaction

timestamp - the wall-clock time

Returns:

a future that completes with the recorded version that comes immediately after the target time