org.apache.hudi.common.table.timeline

Class WaitBasedTimeGenerator

java.lang.Object

org.apache.hudi.common.table.timeline.TimeGeneratorBase

org.apache.hudi.common.table.timeline.WaitBasedTimeGenerator

All Implemented Interfaces:

Serializable, TimeGenerator

public class WaitBasedTimeGenerator
extends TimeGeneratorBase

Time generator that waits for some time for each time generation to resolve the clock skew issue.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.hudi.common.table.timeline.TimeGeneratorBase

config

Constructor Summary

Constructors

Constructor and Description
WaitBasedTimeGenerator(HoodieTimeGeneratorConfig config, StorageConfiguration<?> storageConf)

Method Summary

Modifier and Type	Method and Description
void	consumeTimestamp(boolean skipLocking, Consumer<Long> func) Passes an auto generated timestamp to the given function func.
long	currentTimeMillis(boolean skipLocking) Generates a globally monotonically increasing timestamp.

Methods inherited from class org.apache.hudi.common.table.timeline.TimeGeneratorBase

getLockProvider, lock, unlock

Methods inherited from class java.lang.Object

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

Constructor Detail

WaitBasedTimeGenerator

public WaitBasedTimeGenerator(HoodieTimeGeneratorConfig config,
                              StorageConfiguration<?> storageConf)

Method Detail

currentTimeMillis

public long currentTimeMillis(boolean skipLocking)

Description copied from interface: TimeGenerator

Generates a globally monotonically increasing timestamp. The implementation must ensure that a new generated timestamp T is guaranteed to be greater than any timestamp generated by the preceding calls.

Parameters:

skipLocking - If this is triggered by another parent transaction, locking can be skipped.

Returns:

Current true time as milliseconds.

consumeTimestamp

public void consumeTimestamp(boolean skipLocking,
                             Consumer<Long> func)

Description copied from interface: TimeGenerator

Passes an auto generated timestamp to the given function func. The implementations need to ensure timestamp generation and executing func are atomic.

Parameters:

skipLocking - If this is triggered by another parent transaction, locking can be skipped.

func - A consumer that takes a monotonically increasing timestamp.