org.apache.sling.discovery.oak

Class SynchronizedClocksHealthCheck

java.lang.Object

org.apache.sling.discovery.oak.SynchronizedClocksHealthCheck

All Implemented Interfaces:

HealthCheck

@Property(name="hc.name",value="Synchronized Clocks",description="Health Check name",label="Name") @Property(name="hc.tags",unbounded=ARRAY,description="Health Check tags",label="Tags") @Property(name="hc.mbean.name",value="slingDiscoveryOakSynchronizedClocks",description="Health Check MBean name",label="MBean name")
 @Service(value=HealthCheck.class)
public class SynchronizedClocksHealthCheck
extends Object
implements HealthCheck

HealthCheck that builds on-top of DocumentNodeStore's determineServerTimeDifferenceMillis method which checks how much the local time differs from the DocumentStore's time. It then applies low- and high-water marks to that time difference:

• if the value is higher than the high-water mark (5sec by default), then it issues a critical
• if the value is lower than the high-water but higher than the low-water mark (1sec by default), then it issues only a warn
• if the value is lower than the low-water mark, then it issues only an info

Field Summary

Fields

Modifier and Type	Field and Description
protected org.slf4j.Logger	logger

Fields inherited from interface org.apache.sling.hc.api.HealthCheck

ASYNC_CRON_EXPRESSION, MBEAN_NAME, NAME, RESULT_CACHE_TTL_IN_MS, TAGS

Constructor Summary

Constructors

Constructor and Description
SynchronizedClocksHealthCheck()

Method Summary

Modifier and Type	Method and Description
Result	execute() Execute this health check and return a Result This is meant to execute quickly, access to external systems, for example, should be managed asynchronously.

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected final org.slf4j.Logger logger

Constructor Detail

SynchronizedClocksHealthCheck

public SynchronizedClocksHealthCheck()

Method Detail

execute

public Result execute()

Description copied from interface: HealthCheck

Execute this health check and return a Result This is meant to execute quickly, access to external systems, for example, should be managed asynchronously.

Specified by:

execute in interface HealthCheck