Package jline.lang.constant

Enum HeteroSchedPolicy

java.lang.Object

java.lang.Enum<HeteroSchedPolicy>

jline.lang.constant.HeteroSchedPolicy

All Implemented Interfaces:

Serializable, Comparable<HeteroSchedPolicy>, java.lang.constant.Constable

public enum HeteroSchedPolicy
extends Enum<HeteroSchedPolicy>

Enumeration of scheduling policies for heterogeneous multiserver queues.

These policies determine how jobs are assigned to servers when multiple server types are available and a job's class is compatible with more than one server type.

The policies are based on JMT's heterogeneous server scheduling:

• ORDER - Assign to first available compatible server type (in definition order)
• ALIS - Assign Longest Idle Server
• ALFS - Assign Longest Free Server (with fairness sorting)
• FAIRNESS - Fair distribution across compatible server types
• FSF - Fastest Server First (based on expected service time)
• RAIS - Random Available Idle Server

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
ALFS	Assign Longest Free Server with fairness sorting.
ALIS	Assign Longest Idle Server.
FAIRNESS	Fair distribution across compatible server types.
FSF	Fastest Server First.
ORDER	Assign to first available compatible server type in definition order.
RAIS	Random Available Idle Server.

Method Summary

Modifier and Type	Method	Description
static HeteroSchedPolicy	fromText(String text)	Converts a string representation to a HeteroSchedPolicy enum value.
String	toJMTText()	Converts this policy to JMT's descriptive label (e.g.
static String	toJMTText(HeteroSchedPolicy policy)
String	toText()	Converts this policy to its text representation.
static String	toText(HeteroSchedPolicy policy)	Converts a HeteroSchedPolicy to its text representation.
static HeteroSchedPolicy	valueOf(String name)	Returns the enum constant of this type with the specified name.
static HeteroSchedPolicy[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

ORDER

public static final HeteroSchedPolicy ORDER

Assign to first available compatible server type in definition order. This is the default policy. Servers are checked in the order they were added to the queue, and the first compatible server with availability is used.

ALIS

public static final HeteroSchedPolicy ALIS

Assign Longest Idle Server. Servers cycle through in order, with fully busy servers moving to the back of the list. Provides round-robin behavior among compatible servers.

ALFS

public static final HeteroSchedPolicy ALFS

Assign Longest Free Server with fairness sorting. Server types are sorted by compatibility coverage (servers with exclusive classes first), then all servers cycle together to ensure fairness.

FAIRNESS

public static final HeteroSchedPolicy FAIRNESS

Fair distribution across compatible server types. Simple round-robin among compatible servers, with used servers moving to the back of the list.

FSF

public static final HeteroSchedPolicy FSF

Fastest Server First. Always selects the compatible server type with the fastest expected service time for the job's class. Optimizes for lowest latency.

RAIS

public static final HeteroSchedPolicy RAIS

Random Available Idle Server. Randomly selects among compatible server types that have available capacity.

Method Details

values

public static HeteroSchedPolicy[] values()

Returns an array containing the constants of this enum type, in the order they are declared.

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static HeteroSchedPolicy valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

fromText

public static HeteroSchedPolicy fromText(String text)

Converts a string representation to a HeteroSchedPolicy enum value.

Parameters:

text - the string representation (case-insensitive)

Returns:

the corresponding HeteroSchedPolicy enum value

Throws:

IllegalArgumentException - if the string is not recognized

toText

public String toText()

Converts this policy to its text representation.

Returns:

the text representation of this policy

toText

public static String toText(HeteroSchedPolicy policy)

Converts a HeteroSchedPolicy to its text representation.

Parameters:

policy - the policy to convert

Returns:

the text representation

toJMTText

public String toJMTText()

Converts this policy to JMT's descriptive label (e.g. "ALIS (Assign Longest Idle Server)"). JMT's engine compares schedulingPolicy XML values against these long forms, so the JMT writer must use this method rather than toText().

Returns:

the JMT-compatible descriptive label

toJMTText

public static String toJMTText(HeteroSchedPolicy policy)