Package io.hekate.cluster.split

Class SplitBrainDetectorGroup

java.lang.Object

io.hekate.cluster.split.SplitBrainDetectorGroup

All Implemented Interfaces:

SplitBrainDetector, ConfigReportSupport

public class SplitBrainDetectorGroup
extends Object
implements SplitBrainDetector, ConfigReportSupport

Combination of multiple split-brain detectors.

This class represents a combination of multiple SplitBrainDetectors. During each isValid(ClusterNode) call this class invokes each of its detectors and uses a group policy to decide on whether the whole group check was successful or failed.

See Also:

ClusterServiceFactory.setSplitBrainDetector(SplitBrainDetector)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SplitBrainDetectorGroup.GroupPolicy	Group policy for SplitBrainDetectorGroup.

Constructor Summary

Constructors

Constructor	Description
SplitBrainDetectorGroup()

Method Summary

Modifier and Type	Method	Description
List<SplitBrainDetector>	getDetectors()	Returns the list of registered detectors (see setDetectors(List)).
SplitBrainDetectorGroup.GroupPolicy	getGroupPolicy()	Returns the policy of this group (see setGroupPolicy(GroupPolicy)).
boolean	isValid(ClusterNode localNode)	Performs a split-brain check and returns true if local node can reach other members of the cluster.
void	report(ConfigReporter report)	Report configuration.
void	setDetectors(List<SplitBrainDetector> detectors)	Sets the list of detectors that should be invoked during each isValid(ClusterNode) check.
void	setGroupPolicy(SplitBrainDetectorGroup.GroupPolicy groupPolicy)	Sets the group policy.
String	toString()
SplitBrainDetectorGroup	withDetector(SplitBrainDetector detector)	Fluent-style version of setDetectors(List).
SplitBrainDetectorGroup	withGroupPolicy(SplitBrainDetectorGroup.GroupPolicy groupPolicy)	Fluent-style version of setGroupPolicy(GroupPolicy).

Methods inherited from class java.lang.Object

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

Constructor Detail

SplitBrainDetectorGroup

public SplitBrainDetectorGroup()

Method Detail

isValid

public boolean isValid(ClusterNode localNode)

Description copied from interface: SplitBrainDetector

Performs a split-brain check and returns true if local node can reach other members of the cluster.

If this method returns false then HekateFatalErrorPolicy will be applied with ClusterSplitBrainException as a cause.

Specified by:

isValid in interface SplitBrainDetector

Parameters:

localNode - Local node (where the check is performed).

Returns:

true if local node can reach other members of the cluster.

report

public void report(ConfigReporter report)

Description copied from interface: ConfigReportSupport

Report configuration.

Specified by:

report in interface ConfigReportSupport

Parameters:

report - Reporter.

getDetectors

public List<SplitBrainDetector> getDetectors()

Returns the list of registered detectors (see setDetectors(List)).

Returns:

Detectors.

setDetectors

public void setDetectors(List<SplitBrainDetector> detectors)

Sets the list of detectors that should be invoked during each isValid(ClusterNode) check.

If the specified list is null or empty then all isValid(ClusterNode) checks will always return true.

Parameters:

detectors - Detectors.

withDetector

public SplitBrainDetectorGroup withDetector(SplitBrainDetector detector)

Fluent-style version of setDetectors(List).

Parameters:

detector - Detector.

Returns:

This instance.

getGroupPolicy

public SplitBrainDetectorGroup.GroupPolicy getGroupPolicy()

Returns the policy of this group (see setGroupPolicy(GroupPolicy)).

Returns:

Policy.

setGroupPolicy

public void setGroupPolicy(SplitBrainDetectorGroup.GroupPolicy groupPolicy)

Sets the group policy.

This parameter is mandatory and can't be null. Default value is SplitBrainDetectorGroup.GroupPolicy.ANY_VALID.

Parameters:

groupPolicy - Group policy.

withGroupPolicy

public SplitBrainDetectorGroup withGroupPolicy(SplitBrainDetectorGroup.GroupPolicy groupPolicy)

Fluent-style version of setGroupPolicy(GroupPolicy).

Parameters:

groupPolicy - Group policy.

Returns:

This instance.

toString

public String toString()

Overrides:

toString in class Object