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com.tangosol.net
Class ConfigurableQuorumPolicy.PartitionedCacheQuorumPolicy

java.lang.Object
com.tangosol.util.Base
com.tangosol.net.ConfigurableQuorumPolicy
com.tangosol.net.ConfigurableQuorumPolicy.MembershipQuorumPolicy
com.tangosol.net.ConfigurableQuorumPolicy.PartitionedCacheQuorumPolicy

All Implemented Interfaces:

ActionPolicy

Enclosing class:

ConfigurableQuorumPolicy

public static class ConfigurableQuorumPolicy.PartitionedCacheQuorumPolicy

extends ConfigurableQuorumPolicy.MembershipQuorumPolicy

PartitionedCacheQuorumPolicy defines a configurable quorum policy that is applicable to a DistributedCacheService.

Nested Class Summary

Nested classes/interfaces inherited from class com.tangosol.net.ConfigurableQuorumPolicy.MembershipQuorumPolicy

ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumListener, ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule

Nested classes/interfaces inherited from class com.tangosol.net.ConfigurableQuorumPolicy

ConfigurableQuorumPolicy.ClusterQuorumPolicy, ConfigurableQuorumPolicy.MembershipQuorumPolicy, ConfigurableQuorumPolicy.PartitionedCacheQuorumPolicy, ConfigurableQuorumPolicy.ProxyQuorumPolicy, ConfigurableQuorumPolicy.WrapperQuorumPolicy

Field Summary

static int	MASK_DISTRIBUTION Bitmask used to encode a distribution action.
static int	MASK_READ Bitmask used to encode a read action.
static int	MASK_RESTORE Bitmask used to encode a partition restore action.
static int	MASK_WRITE Bitmask used to encode a write action.

Fields inherited from class com.tangosol.net.ConfigurableQuorumPolicy.MembershipQuorumPolicy

m_aRules, m_ruleCurrent, m_service, m_setLeaving

Constructor Summary

ConfigurableQuorumPolicy.PartitionedCacheQuorumPolicy(ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule[] aRule)
Construct a PartitionedCacheQuorumPolicy with the specified rule.

Method Summary

int	getPolicyPopulation() Calculate and return the current size of the member set that contributes to the quorum for this policy domain.
java.lang.String	getStatusDescription() Return a String that describes the current Quorum state.
boolean	isAllowed(Service service, Action action) Evaluate if the specified action is currently allowed by this policy.

Methods inherited from class com.tangosol.net.ConfigurableQuorumPolicy.MembershipQuorumPolicy

configure, getCurrentRule, getLeavingMembers, getQuorumRules, getService, init, instantiateMemberListener, setCurrentRule, setQuorumRules, setService, sortByThreshold, toString, updateCurrentRule

Methods inherited from class com.tangosol.net.ConfigurableQuorumPolicy

instantiateClusterPolicy, instantiatePartitionedCachePolicy, instantiateProxyPolicy

Field Detail

MASK_DISTRIBUTION

public static final int MASK_DISTRIBUTION

Bitmask used to encode a distribution action.

See Also:

Constant Field Values

MASK_RESTORE

public static final int MASK_RESTORE

Bitmask used to encode a partition restore action.

See Also:

Constant Field Values

MASK_READ

public static final int MASK_READ

Bitmask used to encode a read action.

See Also:

Constant Field Values

MASK_WRITE

public static final int MASK_WRITE

Bitmask used to encode a write action.

See Also:

Constant Field Values

Constructor Detail

ConfigurableQuorumPolicy.PartitionedCacheQuorumPolicy

public ConfigurableQuorumPolicy.PartitionedCacheQuorumPolicy(ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule[] aRule)

Construct a PartitionedCacheQuorumPolicy with the specified rule.

Parameters:

aRule - the quorum rule.

Method Detail

getStatusDescription

public java.lang.String getStatusDescription()

Return a String that describes the current Quorum state.

Specified by:

getStatusDescription in class ConfigurableQuorumPolicy

Returns:

a String describing the allowed actions in the current state

getPolicyPopulation

public int getPolicyPopulation()

Calculate and return the current size of the member set that contributes to the quorum for this policy domain.
Note: The quorum for PartitionedService is determined by the ownership-enabled members only.

Overrides:

getPolicyPopulation in class ConfigurableQuorumPolicy.MembershipQuorumPolicy

Returns:

the current size

isAllowed

public boolean isAllowed(Service service,
                         Action action)

Evaluate if the specified action is currently allowed by this policy.

Note: for forward compatibility, implementations should generally return true for actions that are not recognized.

Parameters:

service - the service that is performing the action

action - the action that is being performed

Returns:

true iff the specified action is currently allowed by this policy

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