com.atlassian.confluence.impl.experiments

Class InstanceExperimentsRegister

java.lang.Object

com.atlassian.confluence.impl.experiments.InstanceExperimentsRegister

public class InstanceExperimentsRegister
extends Object

A register of defined "instance experiments" currently running in Confluence Cloud. The determination of which experiments are active for the current environment is done by introspection of certain system properties e.g. unicorn rack and datacenter. In addition, the experiments may be explicitly toggled on or off by experiment-specific system properties.

This class is suitable for control of "instance experiments", i.e. experiments which affect the entire Confluence instance, rather than experiments which affect individual users (for which you should use DarkFeaturesManager or DarkFeatureManager).

Note that this class provides an alternative to Icebat for defining per-rack instance experiments. In icebat you would define the experiment by causing a system property to be defined at startup if the instance is running on a given rack, whereas this register looks at the rack parameters directly.

The Experiment annotations have no functional purpose, but serve as documentation.

Constructor Summary

Constructors

Constructor and Description
InstanceExperimentsRegister()

Method Summary

Modifier and Type	Method and Description
static int	getPagePermissionsBulkSqlMinimumThreshold()
static boolean	isAllExternalisedToMemcached() All caches must be externalised to memcached in vertigo mode.
static boolean	isFirstBatchExternalisedToMemcached()
static boolean	isMemcachedAvailable() Infers whether or not a memcached service is running and available.
static boolean	isMethodStackTraceMetricsLoggingEnabled()
static boolean	isPageDaoGetPageExternalisedToMemcached()
static boolean	isPagePermissionsBulkSqlEnabled()
static boolean	isSecondBatchExternalisedToMemcached()
static boolean	isThirdBatchExternalisedToMemcached()
static boolean	isUTCTimezoneEnabled()
static boolean	isVisibleChildrenSqlQueryEnabled()
static float	requestMetricsSampleRate()

Methods inherited from class java.lang.Object

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

Constructor Detail

InstanceExperimentsRegister

public InstanceExperimentsRegister()

Method Detail

isVisibleChildrenSqlQueryEnabled

public static boolean isVisibleChildrenSqlQueryEnabled()

isPagePermissionsBulkSqlEnabled

public static boolean isPagePermissionsBulkSqlEnabled()

getPagePermissionsBulkSqlMinimumThreshold

public static int getPagePermissionsBulkSqlMinimumThreshold()

isMethodStackTraceMetricsLoggingEnabled

public static boolean isMethodStackTraceMetricsLoggingEnabled()

isPageDaoGetPageExternalisedToMemcached

public static boolean isPageDaoGetPageExternalisedToMemcached()

isFirstBatchExternalisedToMemcached

public static boolean isFirstBatchExternalisedToMemcached()

isSecondBatchExternalisedToMemcached

public static boolean isSecondBatchExternalisedToMemcached()

isThirdBatchExternalisedToMemcached

public static boolean isThirdBatchExternalisedToMemcached()

isAllExternalisedToMemcached

public static boolean isAllExternalisedToMemcached()

All caches must be externalised to memcached in vertigo mode. Can be explicitly disabled by setting confluence.force.cache.externalisation to false, otherwise true by default.

isMemcachedAvailable

public static boolean isMemcachedAvailable()

Infers whether or not a memcached service is running and available. Note: the confluence.memcached.enable sysprop used to be the sole indication of whether a memcached service was running or not. It also used to decide whether we used the MemcachedVCacheService or the old LegacyVCacheService. We will still respect this override, so that a local "unicorn" environment can be told to communicate with memcached if needed, and we can explicitly not push caches out to memcached if needed. It can be inferred that the service is available if Confluence is running in vertigo mode. It can be inferred that the service is available if Confluence is running in real unicorn on a real rack.

isUTCTimezoneEnabled

public static boolean isUTCTimezoneEnabled()

requestMetricsSampleRate

public static float requestMetricsSampleRate()