com.datastax.driver.core

Interface TimestampGenerator

All Known Implementing Classes:

AbstractMonotonicTimestampGenerator, AtomicMonotonicTimestampGenerator, LoggingMonotonicTimestampGenerator, ServerSideTimestampGenerator, ThreadLocalMonotonicTimestampGenerator

public interface TimestampGenerator

Generates client-side, microsecond-precision query timestamps.

Given that Cassandra uses those timestamps to resolve conflicts, implementations should generate monotonically increasing timestamps for successive invocations of next().

Method Summary

Modifier and Type	Method and Description
long	next() Returns the next timestamp.

Method Detail

next

long next()

Returns the next timestamp.

Implementors should enforce increasing monotonicity of timestamps, that is, a timestamp returned should always be strictly greater that any previously returned timestamp.

Implementors should strive to achieve microsecond precision in the best possible way, which is usually largely dependent on the underlying operating system's capabilities.

Returns:

the next timestamp (in microseconds). If it equals Long.MIN_VALUE, it won't be sent by the driver, letting Cassandra generate a server-side timestamp.