io.lettuce.core.cluster

Class ClusterTopologyRefreshOptions

java.lang.Object

io.lettuce.core.cluster.ClusterTopologyRefreshOptions

public class ClusterTopologyRefreshOptions
extends Object

Options to control the Cluster topology refreshing of RedisClusterClient.

Since:

4.2

Author:

Mark Paluch

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ClusterTopologyRefreshOptions.Builder Builder for ClusterTopologyRefreshOptions.
static class	ClusterTopologyRefreshOptions.RefreshTrigger Available refresh triggers to signal early topology refreshing.

Field Summary

Fields

Modifier and Type	Field and Description
static long	DEFAULT_ADAPTIVE_REFRESH_TIMEOUT
static Duration	DEFAULT_ADAPTIVE_REFRESH_TIMEOUT_DURATION
static TimeUnit	DEFAULT_ADAPTIVE_REFRESH_TIMEOUT_UNIT
static Set<ClusterTopologyRefreshOptions.RefreshTrigger>	DEFAULT_ADAPTIVE_REFRESH_TRIGGERS
static boolean	DEFAULT_CLOSE_STALE_CONNECTIONS
static boolean	DEFAULT_DYNAMIC_REFRESH_SOURCES
static boolean	DEFAULT_PERIODIC_REFRESH_ENABLED
static long	DEFAULT_REFRESH_PERIOD
static Duration	DEFAULT_REFRESH_PERIOD_DURATION
static TimeUnit	DEFAULT_REFRESH_PERIOD_UNIT
static int	DEFAULT_REFRESH_TRIGGERS_RECONNECT_ATTEMPTS

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ClusterTopologyRefreshOptions(ClusterTopologyRefreshOptions.Builder builder)
protected	ClusterTopologyRefreshOptions(ClusterTopologyRefreshOptions original)

Method Summary

Modifier and Type	Method and Description
static ClusterTopologyRefreshOptions.Builder	builder() Returns a new ClusterTopologyRefreshOptions.Builder to construct ClusterTopologyRefreshOptions.
static ClusterTopologyRefreshOptions	copyOf(ClusterTopologyRefreshOptions options) Create a copy of options.
static ClusterTopologyRefreshOptions	create() Create a new ClusterTopologyRefreshOptions using default settings.
static ClusterTopologyRefreshOptions	enabled() Create a new ClusterTopologyRefreshOptions using default settings with enabled periodic and adaptive refresh.
Duration	getAdaptiveRefreshTimeout() Timeout between adaptive cluster topology updates.
Set<ClusterTopologyRefreshOptions.RefreshTrigger>	getAdaptiveRefreshTriggers() Returns the set of triggers.
Duration	getRefreshPeriod() Period between the regular cluster topology updates.
int	getRefreshTriggersReconnectAttempts() Threshold for ClusterTopologyRefreshOptions.RefreshTrigger.PERSISTENT_RECONNECTS.
boolean	isCloseStaleConnections() Flag, whether to close stale connections when refreshing the cluster topology.
boolean	isPeriodicRefreshEnabled() Flag, whether regular cluster topology updates are updated.
boolean	useDynamicRefreshSources() Discover cluster nodes from topology and use the discovered nodes as source for the cluster topology.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_PERIODIC_REFRESH_ENABLED

public static final boolean DEFAULT_PERIODIC_REFRESH_ENABLED

See Also:

Constant Field Values

DEFAULT_REFRESH_PERIOD

public static final long DEFAULT_REFRESH_PERIOD

See Also:

Constant Field Values

DEFAULT_REFRESH_PERIOD_UNIT

public static final TimeUnit DEFAULT_REFRESH_PERIOD_UNIT

DEFAULT_REFRESH_PERIOD_DURATION

public static final Duration DEFAULT_REFRESH_PERIOD_DURATION

DEFAULT_DYNAMIC_REFRESH_SOURCES

public static final boolean DEFAULT_DYNAMIC_REFRESH_SOURCES

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Constant Field Values

DEFAULT_ADAPTIVE_REFRESH_TRIGGERS

public static final Set<ClusterTopologyRefreshOptions.RefreshTrigger> DEFAULT_ADAPTIVE_REFRESH_TRIGGERS

DEFAULT_ADAPTIVE_REFRESH_TIMEOUT

public static final long DEFAULT_ADAPTIVE_REFRESH_TIMEOUT

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Constant Field Values

DEFAULT_ADAPTIVE_REFRESH_TIMEOUT_UNIT

public static final TimeUnit DEFAULT_ADAPTIVE_REFRESH_TIMEOUT_UNIT

DEFAULT_ADAPTIVE_REFRESH_TIMEOUT_DURATION

public static final Duration DEFAULT_ADAPTIVE_REFRESH_TIMEOUT_DURATION

DEFAULT_REFRESH_TRIGGERS_RECONNECT_ATTEMPTS

public static final int DEFAULT_REFRESH_TRIGGERS_RECONNECT_ATTEMPTS

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Constant Field Values

DEFAULT_CLOSE_STALE_CONNECTIONS

public static final boolean DEFAULT_CLOSE_STALE_CONNECTIONS

See Also:

Constant Field Values

Constructor Detail

ClusterTopologyRefreshOptions

protected ClusterTopologyRefreshOptions(ClusterTopologyRefreshOptions.Builder builder)

ClusterTopologyRefreshOptions

protected ClusterTopologyRefreshOptions(ClusterTopologyRefreshOptions original)

Method Detail

copyOf

public static ClusterTopologyRefreshOptions copyOf(ClusterTopologyRefreshOptions options)

Create a copy of options.

Parameters:

options - the original

Returns:

A new instance of ClusterTopologyRefreshOptions containing the values of options

builder

public static ClusterTopologyRefreshOptions.Builder builder()

Returns a new ClusterTopologyRefreshOptions.Builder to construct ClusterTopologyRefreshOptions.

Returns:

a new ClusterTopologyRefreshOptions.Builder to construct ClusterTopologyRefreshOptions.

create

public static ClusterTopologyRefreshOptions create()

Create a new ClusterTopologyRefreshOptions using default settings.

Returns:

a new instance of default cluster client client options.

enabled

public static ClusterTopologyRefreshOptions enabled()

Create a new ClusterTopologyRefreshOptions using default settings with enabled periodic and adaptive refresh.

Returns:

a new instance of default cluster client client options.

isPeriodicRefreshEnabled

public boolean isPeriodicRefreshEnabled()

Flag, whether regular cluster topology updates are updated. The client starts updating the cluster topology in the intervals of getRefreshPeriod(). Defaults to false.

Returns:

true it the cluster topology view is updated periodically

getRefreshPeriod

public Duration getRefreshPeriod()

Period between the regular cluster topology updates. Defaults to 60.

Returns:

the period between the regular cluster topology updates

isCloseStaleConnections

public boolean isCloseStaleConnections()

Flag, whether to close stale connections when refreshing the cluster topology. Defaults to true. Comes only into effect if isPeriodicRefreshEnabled() is true.

Returns:

true if stale connections are cleaned up after cluster topology updates

useDynamicRefreshSources

public boolean useDynamicRefreshSources()

Discover cluster nodes from topology and use the discovered nodes as source for the cluster topology. Using dynamic refresh will query all discovered nodes for the cluster topology and calculate the number of clients for each node.If set to false, only the initial seed nodes will be used as sources for topology discovery and the number of clients will be obtained only for the initial seed nodes. This can be useful when using Redis Cluster with many nodes.

Returns:

true if dynamic refresh sources are enabled

getAdaptiveRefreshTriggers

public Set<ClusterTopologyRefreshOptions.RefreshTrigger> getAdaptiveRefreshTriggers()

Returns the set of triggers. Adaptive refresh triggers initiate topology view updates based on events happened during Redis Cluster operations. Adaptive triggers lead to an immediate topology refresh. Adaptive triggered refreshes are rate-limited using a timeout since events can happen on a large scale. Adaptive refresh triggers are disabled by default.

Returns:

the set of triggers

getAdaptiveRefreshTimeout

public Duration getAdaptiveRefreshTimeout()

Timeout between adaptive cluster topology updates. Defaults to 30.

Returns:

the period between the regular cluster topology updates

getRefreshTriggersReconnectAttempts

public int getRefreshTriggersReconnectAttempts()

Threshold for ClusterTopologyRefreshOptions.RefreshTrigger.PERSISTENT_RECONNECTS. Topology updates based on persistent reconnects lead only to a refresh if the reconnect process tries at least refreshTriggersReconnectAttempts. See DEFAULT_REFRESH_TRIGGERS_RECONNECT_ATTEMPTS.

Returns:

umber of reconnect attempts for a connection before a n adaptive topology refresh is triggered