io.debezium.connector.mysql

Class ParallelSnapshotReader.ParallelHaltingPredicate

java.lang.Object

io.debezium.connector.mysql.ParallelSnapshotReader.ParallelHaltingPredicate

All Implemented Interfaces:

HaltingPredicate

Enclosing class:

ParallelSnapshotReader

static class ParallelSnapshotReader.ParallelHaltingPredicate
extends Object
implements HaltingPredicate

A Halting Predicate for the parallel snapshot reader. Usage for this predicate assumes two readers using two ParallelHalting Predicates. The booleans are owned by the two predicates, and keep track of whether they or the other reader has reached the end of the binlog. Test returns false if both both readers have been determined to be near the end of the binlog. Being near the end of the binlog is determined to be this predicate having seen a record with a timestamp within DEFAULT_MIN_HALTING_DURATION of the current time. Once a single record near the end of the binlog has been seen, we we assume the reader will stay near the end of the binlog.

Field Summary

Fields

Modifier and Type	Field and Description
private static Duration	DEFAULT_MIN_HALTING_DURATION
private static org.slf4j.Logger	LOGGER
private Duration	minHaltingDuration
private AtomicBoolean	otherReaderNearEnd
private AtomicBoolean	thisReaderNearEnd

Constructor Summary

Constructors

Constructor and Description
ParallelHaltingPredicate(AtomicBoolean thisReaderNearEndRef, AtomicBoolean otherReaderNearEndRef)
ParallelHaltingPredicate(AtomicBoolean thisReaderNearEndRef, AtomicBoolean otherReaderNearEndRef, Duration minHaltingDuration)

Method Summary

Modifier and Type	Method and Description
boolean	accepts(org.apache.kafka.connect.source.SourceRecord ourSourceRecord) Whether this record should be processed by the calling reader or not.

Methods inherited from class java.lang.Object

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

Field Detail

LOGGER

private static final org.slf4j.Logger LOGGER

DEFAULT_MIN_HALTING_DURATION

private static final Duration DEFAULT_MIN_HALTING_DURATION

thisReaderNearEnd

private volatile AtomicBoolean thisReaderNearEnd

otherReaderNearEnd

private volatile AtomicBoolean otherReaderNearEnd

minHaltingDuration

private final Duration minHaltingDuration

Constructor Detail

ParallelHaltingPredicate

ParallelHaltingPredicate(AtomicBoolean thisReaderNearEndRef,
                         AtomicBoolean otherReaderNearEndRef)

ParallelHaltingPredicate

ParallelHaltingPredicate(AtomicBoolean thisReaderNearEndRef,
                         AtomicBoolean otherReaderNearEndRef,
                         Duration minHaltingDuration)

Method Detail

accepts

public boolean accepts(org.apache.kafka.connect.source.SourceRecord ourSourceRecord)

Description copied from interface: HaltingPredicate

Whether this record should be processed by the calling reader or not.

Specified by:

accepts in interface HaltingPredicate