Package io.hekate.cluster.health

Class DefaultFailureDetectorConfig

java.lang.Object

io.hekate.cluster.health.DefaultFailureDetectorConfig

public class DefaultFailureDetectorConfig
extends Object

Configuration for DefaultFailureDetector.

See Also:

DefaultFailureDetector

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_FAILURE_DETECTION_QUORUM	Default value (=2) for setFailureDetectionQuorum(int).
static int	DEFAULT_HEARTBEAT_INTERVAL	Default value (=500) for setHeartbeatInterval(long).
static int	DEFAULT_HEARTBEAT_LOSS_THRESHOLD	Default value (=6) for setHeartbeatLossThreshold(int).

Constructor Summary

Constructors

Constructor	Description
DefaultFailureDetectorConfig()

Method Summary

Modifier and Type	Method	Description
int	getFailureDetectionQuorum()	Returns the amount of nodes that should agree on some particular node failure before removing such a suspected node from the cluster (see setFailureDetectionQuorum(int)).
long	getHeartbeatInterval()	Returns the heartbeat sending interval in milliseconds (see setHeartbeatInterval(long)).
int	getHeartbeatLossThreshold()	Returns the amount of heartbeats that can be lost before considering a node failure (see setHeartbeatLossThreshold(int)).
boolean	isFailFast()	Sets the flag that controls the failure detection behavior in case of network connectivity issues between the cluster nodes (see setFailFast(boolean).
void	setFailFast(boolean failFast)	Sets the flag that controls the failure detection behavior in case of network connectivity issues between the cluster nodes.
void	setFailureDetectionQuorum(int failureDetectionQuorum)	Sets the amount of nodes that should agree on some particular node failure before removing such a suspected node from the cluster.
void	setHeartbeatInterval(long heartbeatInterval)	Sets the heartbeat sending interval in milliseconds.
void	setHeartbeatLossThreshold(int heartbeatLossThreshold)	Sets the amount of heartbeats that can be lost before considering a node failure.
String	toString()
DefaultFailureDetectorConfig	withFailFast(boolean failFast)	Fluent-style version of setFailFast(boolean).
DefaultFailureDetectorConfig	withFailureDetectionQuorum(int failureDetectionQuorum)	Fluent-style version of setFailureDetectionQuorum(int).
DefaultFailureDetectorConfig	withHeartbeatInterval(long heartbeatInterval)	Fluent-style version of setHeartbeatInterval(long).
DefaultFailureDetectorConfig	withHeartbeatLossThreshold(int heartbeatLossThreshold)	Fluent-style version of setHeartbeatLossThreshold(int).

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_HEARTBEAT_INTERVAL

public static final int DEFAULT_HEARTBEAT_INTERVAL

Default value (=500) for setHeartbeatInterval(long).

See Also:

Constant Field Values

DEFAULT_HEARTBEAT_LOSS_THRESHOLD

public static final int DEFAULT_HEARTBEAT_LOSS_THRESHOLD

Default value (=6) for setHeartbeatLossThreshold(int).

See Also:

Constant Field Values

DEFAULT_FAILURE_DETECTION_QUORUM

public static final int DEFAULT_FAILURE_DETECTION_QUORUM

Default value (=2) for setFailureDetectionQuorum(int).

See Also:

Constant Field Values

Constructor Detail

DefaultFailureDetectorConfig

public DefaultFailureDetectorConfig()

Method Detail

getHeartbeatInterval

public long getHeartbeatInterval()

Returns the heartbeat sending interval in milliseconds (see setHeartbeatInterval(long)).

Returns:

Time interval in milliseconds.

setHeartbeatInterval

public void setHeartbeatInterval(long heartbeatInterval)

Sets the heartbeat sending interval in milliseconds.

Value of this parameter must be above zero. Default value is 500.

Parameters:

heartbeatInterval - Time interval in milliseconds.

withHeartbeatInterval

public DefaultFailureDetectorConfig withHeartbeatInterval(long heartbeatInterval)

Fluent-style version of setHeartbeatInterval(long).

Parameters:

heartbeatInterval - Time interval in milliseconds.

Returns:

This instance.

getHeartbeatLossThreshold

public int getHeartbeatLossThreshold()

Returns the amount of heartbeats that can be lost before considering a node failure (see setHeartbeatLossThreshold(int)).

Returns:

Heartbeat loss threshold.

setHeartbeatLossThreshold

public void setHeartbeatLossThreshold(int heartbeatLossThreshold)

Sets the amount of heartbeats that can be lost before considering a node failure.

Value of this parameter must be above zero. Default value is 6.

Parameters:

heartbeatLossThreshold - Heartbeat loss threshold.

withHeartbeatLossThreshold

public DefaultFailureDetectorConfig withHeartbeatLossThreshold(int heartbeatLossThreshold)

Fluent-style version of setHeartbeatLossThreshold(int).

Parameters:

heartbeatLossThreshold - Heartbeat loss threshold.

Returns:

This instance.

getFailureDetectionQuorum

public int getFailureDetectionQuorum()

Returns the amount of nodes that should agree on some particular node failure before removing such a suspected node from the cluster (see setFailureDetectionQuorum(int)).

Returns:

Amount of nodes that should agree on some particular node failure before removing such a suspected node from the cluster.

setFailureDetectionQuorum

public void setFailureDetectionQuorum(int failureDetectionQuorum)

Sets the amount of nodes that should agree on some particular node failure before removing such a suspected node from the cluster.

Value of this parameter must be above 1. Default value is 2.

Parameters:

failureDetectionQuorum - Amount of nodes that should agree on some particular node failure before removing such suspected node from the cluster.

See Also:

FailureDetector.failureQuorum()

withFailureDetectionQuorum

public DefaultFailureDetectorConfig withFailureDetectionQuorum(int failureDetectionQuorum)

Fluent-style version of setFailureDetectionQuorum(int).

Parameters:

failureDetectionQuorum - Amount of nodes that should agree on some particular node failure before removing such suspected node from the cluster.

Returns:

This instance.

isFailFast

public boolean isFailFast()

Sets the flag that controls the failure detection behavior in case of network connectivity issues between the cluster nodes (see setFailFast(boolean).

Returns:

true if fast-fail failure detection mode is enabled.

setFailFast

public void setFailFast(boolean failFast)

Sets the flag that controls the failure detection behavior in case of network connectivity issues between the cluster nodes.

If this flag is set to true then cluster node will be immediately treated as failed in case of a ConnectException while sending a gossip message to that node. If set to false then failure detector will wait for all setHeartbeatLossThreshold(int) attempts before treating such a node as failed.

Default value of this parameter is true.

Parameters:

failFast - true to speed up failure detection.

withFailFast

public DefaultFailureDetectorConfig withFailFast(boolean failFast)

Fluent-style version of setFailFast(boolean).

Parameters:

failFast - true to speed up failure detection.

Returns:

This instance.

toString

public String toString()

Overrides:

toString in class Object