Package com.tangosol.net

Class ConfigurableQuorumPolicy.MembershipQuorumPolicy

java.lang.Object

com.tangosol.util.Base

com.tangosol.net.ConfigurableQuorumPolicy

com.tangosol.net.ConfigurableQuorumPolicy.MembershipQuorumPolicy

All Implemented Interfaces:

ActionPolicy

Direct Known Subclasses:

ConfigurableQuorumPolicy.PartitionedCacheQuorumPolicy, ConfigurableQuorumPolicy.ProxyQuorumPolicy

Enclosing class:

ConfigurableQuorumPolicy

public abstract static class ConfigurableQuorumPolicy.MembershipQuorumPolicy
extends ConfigurableQuorumPolicy

MembershipQuorumPolicy is a quorum policy that is stateless and based solely on service membership sizes. MembershipQuorumPolicy uses a state-machine that encodes the allowable Actions, and uses MemberEvents to maintain the state-machine as the service membership changes.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumListener	QuorumListener is used to subscribe the quorum policy to receive service membership events.
static class	ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule	A quorum rule defines a set of allowable actions beyond the rule's threshold size.

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

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

Nested classes/interfaces inherited from class com.tangosol.util.Base

Base.LoggingWriter

Field Summary

Fields

Modifier and Type	Field	Description
protected ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule[]	m_aRules	The array of quorum rules.
protected ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule	m_ruleCurrent	The current state.
protected Service	m_service	The Service that this policy applies to.
protected Set	m_setLeaving	The set of leaving members.

Fields inherited from class com.tangosol.util.Base

DEFAULT_LOAD_FACTOR, LOG_ALWAYS, LOG_CONFIG, LOG_DEBUG, LOG_ERR, LOG_INFO, LOG_MAX, LOG_MIN, LOG_QUIET, LOG_WARN, POWER_0, POWER_G, POWER_K, POWER_M, POWER_T, UNIT_D, UNIT_H, UNIT_M, UNIT_MS, UNIT_NS, UNIT_S, UNIT_US

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	MembershipQuorumPolicy()	Create a MembershipQuorumPolicy.

Method Summary

Modifier and Type	Method	Description
protected void	configure(ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule[] aRule)	Configure and initialize this policy with the specified quorum rules.
protected ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule	getCurrentRule()	Return the current quorum rule used by the policy.
protected Set	getLeavingMembers()	Return the set of members that are leaving the associated service
protected int	getPolicyPopulation()	Calculate and return the current size of the member set that contributes to the quorum for this policy domain.
protected ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule[]	getQuorumRules()	Return the quorum rules used by this policy.
protected ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule	getRule(int nMask)	Return the quorum rule for the specified mask.
Service	getService()	Return the Service which this policy applies to.
void	init(Service service)	Called when the specified service loads and configures this policy.
protected MemberListener	instantiateMemberListener()	Instantiate a member listener to subscribe to service membership events.
protected void	setCurrentRule(ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule ruleCurrent)	Set the current quorum rule used by the policy.
protected void	setQuorumRules(ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule[] aRule)	Set the quorum rules used by this policy.
protected void	setService(Service service)	Set the service that this policy applies to.
String	toString()	Return a human-readable String representation of this ActionPolicy.
protected void	updateCurrentRule()	Update the currently applicable quorum rule, possibly changing it to reflect growth or shrinkage of the membership size.

Methods inherited from class com.tangosol.net.ConfigurableQuorumPolicy

getStatusDescription, instantiateClusterPolicy, instantiatePartitionedCachePolicy, instantiateProxyPolicy

Methods inherited from class com.tangosol.util.Base

azzert, azzert, azzert, azzertFailed, breakLines, breakLines, capitalize, checkNotEmpty, checkNotNull, checkRange, computeSafeWaitTime, decimalValue, dup, dup, ensureBigDecimal, ensureClassLoader, ensureRuntimeException, ensureRuntimeException, equals, equalsDeep, err, err, err, err, err, escape, formatDateTime, getCallerStackFrame, getCommonMonitor, getCommonMonitor, getCommonMonitor, getContextClassLoader, getContextClassLoader, getDeepMessage, getErr, getLastSafeTimeMillis, getLog, getMaxDecDigits, getMaxHexDigits, getOriginalException, getOut, getProcessRandom, getRandom, getRandomBinary, getRandomBinary, getRandomString, getSafeTimeMillis, getStackFrame, getStackFrames, getStackTrace, getStackTrace, getStackTrace, getThreadFactory, getTimeZone, getUpTimeMillis, hashCode, hexValue, indentString, indentString, isDecimal, isHex, isLogEcho, isOctal, log, log, log, log, log, makeInteger, makeLong, makeThread, mergeArray, mergeBooleanArray, mergeByteArray, mergeCharArray, mergeDoubleArray, mergeFloatArray, mergeIntArray, mergeLongArray, mod, mod, newHashMap, newHashMap, newHashSet, newHashSet, octalValue, out, out, out, out, out, pad, parseBandwidth, parseBandwidth, parseDelimitedString, parseHex, parseHex, parseMemorySize, parseMemorySize, parsePercentage, parseTime, parseTime, parseTimeNanos, parseTimeNanos, printStackTrace, randomize, randomize, randomize, randomize, read, read, read, read, read, read, read, replace, setErr, setLog, setLogEcho, setOut, sleep, toBandwidthString, toBandwidthString, toCharEscape, toCrc, toCrc, toCrc, toCrc, toCrc, toDecString, toDelimitedString, toDelimitedString, toDelimitedString, toDelimitedString, toHex, toHex, toHexDump, toHexEscape, toHexEscape, toHexEscape, toHexEscape, toHexString, toMemorySizeString, toMemorySizeString, toQuotedCharEscape, toQuotedStringEscape, toSqlString, toString, toString, toStringEscape, toUnicodeEscape, trace, trace, trace, trace, trace, trace, trace, trace, trace, truncateString, truncateString, wait

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.tangosol.net.ActionPolicy

isAllowed

Field Detail

m_setLeaving

protected Set m_setLeaving

The set of leaving members.

m_service

protected Service m_service

The Service that this policy applies to.

m_ruleCurrent

protected ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule m_ruleCurrent

The current state.

m_aRules

protected ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule[] m_aRules

The array of quorum rules.

Constructor Detail

MembershipQuorumPolicy

protected MembershipQuorumPolicy()

Create a MembershipQuorumPolicy.

Method Detail

getService

public Service getService()

Return the Service which this policy applies to.

Returns:

the Service which this policy applies to

setService

protected void setService(Service service)

Set the service that this policy applies to.

Parameters:

service - the Service that this policy applies to

getCurrentRule

protected ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule getCurrentRule()

Return the current quorum rule used by the policy.

Returns:

the current quorum rule used by the policy

getRule

protected ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule getRule(int nMask)

Return the quorum rule for the specified mask.

Parameters:

nMask - the mask

Returns:

the quorum rule for the specified mask

setCurrentRule

protected void setCurrentRule(ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule ruleCurrent)

Set the current quorum rule used by the policy.

Parameters:

ruleCurrent - the current quorum rule used by the policy

setQuorumRules

protected void setQuorumRules(ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule[] aRule)

Set the quorum rules used by this policy.

Parameters:

aRule - the quorum rules used by this policy

getQuorumRules

protected ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule[] getQuorumRules()

Return the quorum rules used by this policy.

Returns:

the quorum rules used by this policy

getLeavingMembers

protected Set getLeavingMembers()

Return the set of members that are leaving the associated service

Returns:

the set of members that are leaving the associated service

getPolicyPopulation

protected int getPolicyPopulation()

Calculate and return the current size of the member set that contributes to the quorum for this policy domain.

Returns:

the current size

configure

protected void configure(ConfigurableQuorumPolicy.MembershipQuorumPolicy.QuorumRule[] aRule)

Configure and initialize this policy with the specified quorum rules.

Parameters:

aRule - the array of quorum rules to configure for this policy

updateCurrentRule

protected void updateCurrentRule()

Update the currently applicable quorum rule, possibly changing it to reflect growth or shrinkage of the membership size.

init

public void init(Service service)

Called when the specified service loads and configures this policy.

Note: A policy could be applied to multiple services.

Parameters:

service - the service that this policy applies to

toString

public String toString()

Return a human-readable String representation of this ActionPolicy.

Note: this method may be used to provide information about this ActionPolicy to management interfaces.

Specified by:

toString in interface ActionPolicy

Overrides:

toString in class Object

instantiateMemberListener

protected MemberListener instantiateMemberListener()

Instantiate a member listener to subscribe to service membership events.

Returns:

a member listener