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com.tangosol.net.partition
Class SimpleAssignmentStrategy.BackupStrength

java.lang.Object
com.tangosol.net.partition.SimpleAssignmentStrategy.BackupStrength

Enclosing class:

SimpleAssignmentStrategy

protected static class SimpleAssignmentStrategy.BackupStrength

extends java.lang.Object

BackupStrength represents a level of "strength" or "resiliency" between the primary and backup owners of a partition. The BackupStrength is used to determine which backup owners could serve as a "strong" backup for a primary owner.

Field Summary

protected int	m_nStrength The strength (one of the *_SAFE constants).
protected java.util.Set	m_setMachines The set of machine names.
protected java.util.Set	m_setRacks The set of rack names.
protected java.util.Set	m_setSites The set of site names.
protected static int	MACHINE_SAFE Machine-safety (members are on different machines).
protected static int	NODE_SAFE Node-safety (members are different).
protected static int	RACK_SAFE Rack-safety (members are on different racks).
protected static int	SITE_SAFE Site-safety (members are on different sites).

Constructor Summary

protected

SimpleAssignmentStrategy.BackupStrength(int nStrength, java.util.Set setSites, java.util.Set setRacks, java.util.Set setMachines) Construct a BackupStrength of the specified strength.

Method Summary

java.lang.String	getDescription() Return a human-readable description string of this backup-strength.
int	getMachineCount() Return the site count.
int	getRackCount() Return the rack count.
int	getSiteCount() Return the site count.
protected SimpleAssignmentStrategy.BackupStrength	getWeaker() Return the next weakest BackupStrength.
protected boolean	isStrong(Member member1, Member member2) Return true iff the specified members are mutually "strong".
java.lang.String	toString()

Field Detail

NODE_SAFE

protected static final int NODE_SAFE

Node-safety (members are different).

See Also:

Constant Field Values

MACHINE_SAFE

protected static final int MACHINE_SAFE

Machine-safety (members are on different machines).

See Also:

Constant Field Values

RACK_SAFE

protected static final int RACK_SAFE

Rack-safety (members are on different racks).

See Also:

Constant Field Values

SITE_SAFE

protected static final int SITE_SAFE

Site-safety (members are on different sites).

See Also:

Constant Field Values

m_nStrength

protected int m_nStrength

The strength (one of the *_SAFE constants).

m_setSites

protected java.util.Set m_setSites

The set of site names.

m_setRacks

protected java.util.Set m_setRacks

The set of rack names.

m_setMachines

protected java.util.Set m_setMachines

The set of machine names.

Constructor Detail

SimpleAssignmentStrategy.BackupStrength

protected SimpleAssignmentStrategy.BackupStrength(int nStrength,
                                                  java.util.Set setSites,
                                                  java.util.Set setRacks,
                                                  java.util.Set setMachines)

Construct a BackupStrength of the specified strength.

Parameters:

nStrength - one of the BackupStrength.*_SAFE constants

setSites - the site names

setRacks - the rack names

setMachines - the machine names

Method Detail

getWeaker

protected SimpleAssignmentStrategy.BackupStrength getWeaker()

Return the next weakest BackupStrength.

Returns:

a BackupStrength that is immediately weaker than this

isStrong

protected boolean isStrong(Member member1,
                           Member member2)

Return true iff the specified members are mutually "strong".

Parameters:

member1 - the first member to compare

member2 - the second member to compare

Returns:

true iff the specified members are mutually "strong"

getSiteCount

public int getSiteCount()

Return the site count.

Returns:

the site count

getRackCount

public int getRackCount()

Return the rack count.

Returns:

the rack count

getMachineCount

public int getMachineCount()

Return the site count.

Returns:

the site count

getDescription

public java.lang.String getDescription()

Return a human-readable description string of this backup-strength.

Returns:

a human-readable description string of this backup-strength

toString

public java.lang.String toString()

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