Class ReplicaSetStatus
java.lang.Object
com.mongodb.event.ServerMonitorListenerAdapter
org.apache.jackrabbit.oak.plugins.document.mongo.ReplicaSetStatus
- All Implemented Interfaces:
com.mongodb.event.ServerMonitorListener
,EventListener
public class ReplicaSetStatus
extends com.mongodb.event.ServerMonitorListenerAdapter
Keeps track of the status of a replica set based on information provided
by heartbeat events. This status provides a replica set lag estimate, which
can be used to decide whether secondaries are sufficiently up-to-date and
read operations can be sent to a secondary. This is particularly useful when
causal consistent client sessions are used with the MongoDB Java driver. Read
operations shouldn't be sent to a secondary when it lags too much behind,
otherwise the read operation will block until it was able to catch up.
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionlong
void
serverHeartbeatSucceeded
(com.mongodb.event.ServerHeartbeatSucceededEvent event) Methods inherited from class com.mongodb.event.ServerMonitorListenerAdapter
serverHearbeatStarted, serverHeartbeatFailed
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Field Details
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UNKNOWN_LAG
public static final long UNKNOWN_LAG- See Also:
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Constructor Details
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ReplicaSetStatus
public ReplicaSetStatus()
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Method Details
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serverHeartbeatSucceeded
public void serverHeartbeatSucceeded(com.mongodb.event.ServerHeartbeatSucceededEvent event) - Specified by:
serverHeartbeatSucceeded
in interfacecom.mongodb.event.ServerMonitorListener
- Overrides:
serverHeartbeatSucceeded
in classcom.mongodb.event.ServerMonitorListenerAdapter
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getLagEstimate
public long getLagEstimate()
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