org.jppf.node.policy

Class ExecutionPolicy

java.lang.Object

org.jppf.node.policy.ExecutionPolicy

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

AtLeast, AtMost, BetweenPolicy, Contains, CustomPolicy, Equal, ExecutionPolicy.LogicalRule, ExecutionPolicy.NotRule, IsInIPv4Subnet, IsInIPv6Subnet, LessThan, MoreThan, NodesMatching, OneOf, PolicyRuleTest, RegExp, ScriptedPolicy

public abstract class ExecutionPolicy
extends Object
implements Serializable

Interface for all execution policy implementations. This API defines a DSL for predicate-oriented expressions.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ExecutionPolicy.AndRule An execution policy that realizes a logical "AND" combination of multiple policies specified as operands.
static class	ExecutionPolicy.LogicalRule An execution policy that realizes a binary logical combination of the policies specified as operands.
static class	ExecutionPolicy.NotRule An execution policy that realizes the negation of a policy specified as operand.
static class	ExecutionPolicy.OrRule An execution policy that realizes a logical "OR" combination of multiple policies specified as operands.
static class	ExecutionPolicy.XorRule An execution policy that realizes a logical "XOR" combination of multiple policies specified as operands.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ExecutionPolicy(ExecutionPolicy... children) Initialize this policy with the specified children.

Method Summary

Methods

Modifier and Type	Method and Description
abstract boolean	accepts(PropertiesCollection info) Determines whether this policy accepts the specified node.
ExecutionPolicy	and(ExecutionPolicy... rules) Create an execution policy that is a logical "AND" combination of this policy and those specified as operands.
ExecutionPolicy	and(ExecutionPolicy rule) Create an execution policy that is a logical "AND" combination of this policy and the one specified as operand.
ExecutionPolicy	andNot(ExecutionPolicy... rules) Create an execution policy that is a logical "AND" combination of this policy and the negations of those specified as argumens.
ExecutionPolicy	andNot(ExecutionPolicy rule) Create an execution policy that is a logical "NOT" combination of this policy and the negations of the one specified as argument.
PolicyContext	getContext() Get the context for this policy.
String	getProperty(PropertiesCollection info, String name) Get the value of the specified property in the specified set of system information.
ExecutionPolicy	not() Create an execution policy that is a negation of this policy.
static ExecutionPolicy	Not(ExecutionPolicy policy) A convenience method to provide a way to negate a policy that is consistent with the execution policy DSL.
ExecutionPolicy	or(ExecutionPolicy... rules) Create an execution policy that is a logical "OR" combination of this policy and those specified as operands.
ExecutionPolicy	or(ExecutionPolicy rule) Create an execution policy that is a logical "OR" combination of this policy and the one specified as operand.
ExecutionPolicy	orNot(ExecutionPolicy... rules) Create an execution policy that is a logical "OR" combination of this policy and the negations of those specified as arguments.
ExecutionPolicy	orNot(ExecutionPolicy rule) Create an execution policy that is a logical "OR" combination of this policy and the negations of the one specified as argument.
ExecutionPolicy	xor(ExecutionPolicy... rules) Create an execution policy that is a logical "XOR" combination of the this policy and those specified as operands.
ExecutionPolicy	xor(ExecutionPolicy rule) Create an execution policy that is a logical "XOR" combination of this policy and the one specified as operand.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExecutionPolicy

protected ExecutionPolicy(ExecutionPolicy... children)

Initialize this policy with the specified children.

Parameters:

children - the children of this policy.

Method Detail

accepts

public abstract boolean accepts(PropertiesCollection info)

Determines whether this policy accepts the specified node.

Parameters:

info - system information for the node on which the tasks will run if accepted.

Returns:

true if the node is accepted, false otherwise.

and

public ExecutionPolicy and(ExecutionPolicy rule)

Create an execution policy that is a logical "AND" combination of this policy and the one specified as operand.

Parameters:

rule - the rule to combine this one with.

Returns:

an execution policy that combines the this policy with the operand in an "AND" operation.

and

public ExecutionPolicy and(ExecutionPolicy... rules)

Create an execution policy that is a logical "AND" combination of this policy and those specified as operands.

Parameters:

rules - rules to combine this one with.

Returns:

an execution policy that combines the this policy with the operand in an "AND" operation.

andNot

public ExecutionPolicy andNot(ExecutionPolicy rule)

Create an execution policy that is a logical "NOT" combination of this policy and the negations of the one specified as argument.

Parameters:

rule - the rule to combine this one with.

Returns:

an execution policy that combines the this policy with the operand in an "AND" operation.

andNot

public ExecutionPolicy andNot(ExecutionPolicy... rules)

Create an execution policy that is a logical "AND" combination of this policy and the negations of those specified as argumens.

Parameters:

rules - rules to combine this one with.

Returns:

an execution policy that combines the this policy with the operand in an "AND" operation.

or

public ExecutionPolicy or(ExecutionPolicy rule)

Create an execution policy that is a logical "OR" combination of this policy and the one specified as operand.

Parameters:

rule - the rule to combine this one with.

Returns:

an execution policy that combines the this policy with the operand in an "OR" operation.

or

public ExecutionPolicy or(ExecutionPolicy... rules)

Create an execution policy that is a logical "OR" combination of this policy and those specified as operands.

Parameters:

rules - rules to combine this one with.

Returns:

an execution policy that combines the this policy with the operand in an "OR" operation.

orNot

public ExecutionPolicy orNot(ExecutionPolicy rule)

Create an execution policy that is a logical "OR" combination of this policy and the negations of the one specified as argument.

Parameters:

rule - rules to combine this one with.

Returns:

an execution policy that combines the this policy with the negated operand in an "OR NOT" operation.

orNot

public ExecutionPolicy orNot(ExecutionPolicy... rules)

Create an execution policy that is a logical "OR" combination of this policy and the negations of those specified as arguments.

Parameters:

rules - rules to combine this one with.

Returns:

an execution policy that combines the this policy with the negated operand in an "OR NOT" operation.

xor

public ExecutionPolicy xor(ExecutionPolicy rule)

Create an execution policy that is a logical "XOR" combination of this policy and the one specified as operand.

Parameters:

rule - the rule to combine this one with.

Returns:

an execution policy that combines the this policy with the operand in an "XOR" operation.

xor

public ExecutionPolicy xor(ExecutionPolicy... rules)

Create an execution policy that is a logical "XOR" combination of the this policy and those specified as operands.

Parameters:

rules - rules to combine this one with.

Returns:

an execution policy that combines the this policy with the operand in an "XOR" operation.

not

public ExecutionPolicy not()

Create an execution policy that is a negation of this policy.

Returns:

an execution policy that negates this policy.

getProperty

public String getProperty(PropertiesCollection info,
                 String name)

Get the value of the specified property in the specified set of system information.

Parameters:

info - the system information in which to lookup the property.

name - the name of the property to look for.

Returns:

the value of the property, or null if it could not be found.

Not

public static ExecutionPolicy Not(ExecutionPolicy policy)

A convenience method to provide a way to negate a policy that is consistent with the execution policy DSL.

Parameters:

policy - the policy to negate.

Returns:

An execution policy which negates the specified policy, or null if the specified policy was null.

getContext

public PolicyContext getContext()

Get the context for this policy.

Returns:

a PolicyContext object.

Since:

5.0