Package io.debezium.connector.mongodb

Class ReplicaSetMonitorThread

java.lang.Object

io.debezium.connector.mongodb.ReplicaSetMonitorThread

All Implemented Interfaces:

Runnable

public final class ReplicaSetMonitorThread
extends Object
implements Runnable

A thread that can be used to when new replica sets are added or existing replica sets are removed. The logic does not evaluate membership changes of individual replica sets, since that is handled independently by each task.

Author:

Randall Hauch

Field Summary

Fields

Modifier and Type	Field	Description
private CountDownLatch	initialized
private org.slf4j.Logger	logger
private Metronome	metronome
private Supplier<ReplicaSets>	monitor
private Consumer<ReplicaSets>	onChange
private Runnable	onStartup
private ReplicaSets	replicaSets

Constructor Summary

Constructors

Constructor	Description
ReplicaSetMonitorThread(Supplier<ReplicaSets> monitor, Duration period, Clock clock, Runnable onStartup, Consumer<ReplicaSets> onChange)

Method Summary

Modifier and Type	Method	Description
ReplicaSets	getReplicaSets(long timeout, TimeUnit unit)	Get the information about each of the replica sets.
void	run()

Methods inherited from class java.lang.Object

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

Field Detail

logger

private final org.slf4j.Logger logger

metronome

private final Metronome metronome

initialized

private final CountDownLatch initialized

monitor

private final Supplier<ReplicaSets> monitor

onChange

private final Consumer<ReplicaSets> onChange

onStartup

private final Runnable onStartup

replicaSets

private volatile ReplicaSets replicaSets

Constructor Detail

ReplicaSetMonitorThread

public ReplicaSetMonitorThread(Supplier<ReplicaSets> monitor,
                               Duration period,
                               Clock clock,
                               Runnable onStartup,
                               Consumer<ReplicaSets> onChange)

Parameters:

monitor - the component used to periodically obtain the replica set specifications; may not be null

period - the time period between polling checks; must be non-negative

clock - the clock to use; may be null if the system clock should be used

onStartup - the function to call when the thread is started; may be null if not needed

onChange - the function to call when the set of replica set specifications has changed; may be null if not needed

Method Detail

run

public void run()

Specified by:

run in interface Runnable

getReplicaSets

public ReplicaSets getReplicaSets(long timeout,
                                  TimeUnit unit)

Get the information about each of the replica sets.

Parameters:

timeout - the time to block until the replica sets are first obtained from MongoDB; may not be negative

unit - the time unit for the timeout; may not be null

Returns:

the replica sets, or null if the timeout occurred before the replica set information was obtained