Policy Class

Artikel
08/11/2014

The Policy object represents a Policy-Based Management policy. A policy represents the relationship between a target object and a condition.

Inheritance Hierarchy

System.Object
Microsoft.SqlServer.Management.Sdk.Sfc.SfcInstance
Microsoft.SqlServer.Management.Dmf.Policy

Namespace: Microsoft.SqlServer.Management.Dmf
Assembly: Microsoft.SqlServer.Dmf (in Microsoft.SqlServer.Dmf.dll)

Syntax

'Declaration
<StrongNameIdentityPermissionAttribute(SecurityAction.LinkDemand, PublicKey := "0024000004800000940000000602000000240000525341310004000001000100272736ad6e5f9586bac2d531eabc3acc666c2f8ec879fa94f8f7b0327d2ff2ed523448f83c3d5c5dd2dfc7bc99c5286b2c125117bf5cbe242b9d41750732b2bdffe649c6efb8e5526d526fdd130095ecdb7bf210809c6cdad8824faa9ac0310ac3cba2aa0523567b2dfa7fe250b30facbd62d4ec99b94ac47c7d3b28f1f6e4c8")> _
<StrongNameIdentityPermissionAttribute(SecurityAction.LinkDemand, PublicKey := "0024000004800000940000000602000000240000525341310004000001000100272736ad6e5f9586bac2d531eabc3acc666c2f8ec879fa94f8f7b0327d2ff2ed523448f83c3d5c5dd2dfc7bc99c5286b2c125117bf5cbe242b9d41750732b2bdffe649c6efb8e5526d526fdd130095ecdb7bf210809c6cdad8824faa9ac0310ac3cba2aa0523567b2dfa7fe250b30facbd62d4ec99b94ac47c7d3b28f1f6e4c8")> _
Public NotInheritable Class Policy _
    Inherits SfcInstance _
    Implements ISfcCreatable, ICreatable, ISfcDroppable, IDroppable,  _
    ISfcAlterable, IAlterable, ISfcRenamable, IRenamable, ISfcValidate
'Usage
Dim instance As Policy

[StrongNameIdentityPermissionAttribute(SecurityAction.LinkDemand, PublicKey = "0024000004800000940000000602000000240000525341310004000001000100272736ad6e5f9586bac2d531eabc3acc666c2f8ec879fa94f8f7b0327d2ff2ed523448f83c3d5c5dd2dfc7bc99c5286b2c125117bf5cbe242b9d41750732b2bdffe649c6efb8e5526d526fdd130095ecdb7bf210809c6cdad8824faa9ac0310ac3cba2aa0523567b2dfa7fe250b30facbd62d4ec99b94ac47c7d3b28f1f6e4c8")]
[StrongNameIdentityPermissionAttribute(SecurityAction.LinkDemand, PublicKey = "0024000004800000940000000602000000240000525341310004000001000100272736ad6e5f9586bac2d531eabc3acc666c2f8ec879fa94f8f7b0327d2ff2ed523448f83c3d5c5dd2dfc7bc99c5286b2c125117bf5cbe242b9d41750732b2bdffe649c6efb8e5526d526fdd130095ecdb7bf210809c6cdad8824faa9ac0310ac3cba2aa0523567b2dfa7fe250b30facbd62d4ec99b94ac47c7d3b28f1f6e4c8")]
public sealed class Policy : SfcInstance, 
    ISfcCreatable, ICreatable, ISfcDroppable, IDroppable, ISfcAlterable, 
    IAlterable, ISfcRenamable, IRenamable, ISfcValidate

[StrongNameIdentityPermissionAttribute(SecurityAction::LinkDemand, PublicKey = L"0024000004800000940000000602000000240000525341310004000001000100272736ad6e5f9586bac2d531eabc3acc666c2f8ec879fa94f8f7b0327d2ff2ed523448f83c3d5c5dd2dfc7bc99c5286b2c125117bf5cbe242b9d41750732b2bdffe649c6efb8e5526d526fdd130095ecdb7bf210809c6cdad8824faa9ac0310ac3cba2aa0523567b2dfa7fe250b30facbd62d4ec99b94ac47c7d3b28f1f6e4c8")]
[StrongNameIdentityPermissionAttribute(SecurityAction::LinkDemand, PublicKey = L"0024000004800000940000000602000000240000525341310004000001000100272736ad6e5f9586bac2d531eabc3acc666c2f8ec879fa94f8f7b0327d2ff2ed523448f83c3d5c5dd2dfc7bc99c5286b2c125117bf5cbe242b9d41750732b2bdffe649c6efb8e5526d526fdd130095ecdb7bf210809c6cdad8824faa9ac0310ac3cba2aa0523567b2dfa7fe250b30facbd62d4ec99b94ac47c7d3b28f1f6e4c8")]
public ref class Policy sealed : public SfcInstance, 
    ISfcCreatable, ICreatable, ISfcDroppable, IDroppable, ISfcAlterable, 
    IAlterable, ISfcRenamable, IRenamable, ISfcValidate

[<SealedAttribute>]
[<StrongNameIdentityPermissionAttribute(SecurityAction.LinkDemand, PublicKey = "0024000004800000940000000602000000240000525341310004000001000100272736ad6e5f9586bac2d531eabc3acc666c2f8ec879fa94f8f7b0327d2ff2ed523448f83c3d5c5dd2dfc7bc99c5286b2c125117bf5cbe242b9d41750732b2bdffe649c6efb8e5526d526fdd130095ecdb7bf210809c6cdad8824faa9ac0310ac3cba2aa0523567b2dfa7fe250b30facbd62d4ec99b94ac47c7d3b28f1f6e4c8")>]
[<StrongNameIdentityPermissionAttribute(SecurityAction.LinkDemand, PublicKey = "0024000004800000940000000602000000240000525341310004000001000100272736ad6e5f9586bac2d531eabc3acc666c2f8ec879fa94f8f7b0327d2ff2ed523448f83c3d5c5dd2dfc7bc99c5286b2c125117bf5cbe242b9d41750732b2bdffe649c6efb8e5526d526fdd130095ecdb7bf210809c6cdad8824faa9ac0310ac3cba2aa0523567b2dfa7fe250b30facbd62d4ec99b94ac47c7d3b28f1f6e4c8")>]
type Policy =  
    class 
        inherit SfcInstance 
        interface ISfcCreatable 
        interface ICreatable 
        interface ISfcDroppable 
        interface IDroppable 
        interface ISfcAlterable 
        interface IAlterable 
        interface ISfcRenamable 
        interface IRenamable 
        interface ISfcValidate 
    end

public final class Policy extends SfcInstance implements ISfcCreatable, ICreatable, ISfcDroppable, IDroppable, ISfcAlterable, IAlterable, ISfcRenamable, IRenamable, ISfcValidate

The Policy type exposes the following members.

Constructors

	Name	Description
	Policy()	Initializes a new instance of the Policy class.
	Policy(PolicyStore, String)	Initializes a new instance of the Policy class.

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Properties

	Name	Description
	AbstractIdentityKey	Do not reference this member directly in your code. It supports the SQL Server infrastructure. (Inherited from SfcInstance.)
	AutomatedPolicyEvaluationMode	Gets or sets the evaluation mode.
	CategoryId	Gets the ID value that uniquely identifies the category that is associated with the policy.
	Condition	Gets or sets the condition.
	CreateDate	Gets the date and time when the policy was created.
	CreatedBy	Gets the policy store authentication credentials of the user who created the policy.
	DateModified	Gets the date and time when the policy was last modified.
	Description	Gets or sets the textual description of the policy.
	Enabled	Gets or set the Boolean value that specifies whether the policy is enabled.
	EvaluationHistories	Gets the evaluation histories collection.
	HasScript	Gets the Boolean value that specifies whether the policy has a script.
	HelpLink	Gets or sets a URN to additional help information for the policy.
	HelpText	Gets or sets the display name for the help text.
	ID	Gets the ID value that uniquely identifies the policy.
	IdentityKey	Gets the key that identifies the policy.
	IsSystemObject	Determines whether the Policy object is a Object.
	Metadata	Returns metadata about the instance and its domain. (Inherited from SfcInstance.)
	ModifiedBy	Gets the policy store authentication credentials of the user who last modified the policy.
	Name	Gets the name of the Policy object.
	ObjectSet	Gets or sets the set of objects that are associated with the policy.
	Parent	Gets or sets the PolicyStore that is the parent of the policy object.
	PolicyCategory	Gets or sets the category that is associated with the policy.
	Properties	Returns a collection instance properties. (Inherited from SfcInstance.)
	RootCondition	Gets or sets the name of the root condition for this policy.
	ScheduleUid	Gets or sets the Guid that identifies the SQL Server Agent schedule that checks on the policy.
	State	Returns the state of the SfcInstance object. (Inherited from SfcInstance.)
	Urn	Returns the uniform resource name of the SfcInstance object. (Inherited from SfcInstance.)

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Methods

	Name	Description
	Alter	Updates any Policy object property changes on the instance of SQL Server.
	Create	Creates management policy item.
	CreateIdentityKey	Do not reference this member directly in your code. It supports the SQL Server infrastructure. (Inherited from SfcInstance.)
	Discover	Discovers conditions in the ObjectSet and adds them to the ISfcDependencyDiscoveryObjectSink identified by the sink parameter. (Overrides SfcInstance.Discover(ISfcDependencyDiscoveryObjectSink).)
	Drop	Removes the policy from the instance of SQL Server.
	Equals	(Inherited from Object.)
	Evaluate(AdHocPolicyEvaluationMode, array<ISfcConnection[])	Evaluates the Policy object and applies policy to the data in identified by the targetConnections parameter.
	Evaluate(AdHocPolicyEvaluationMode, array<Object[])	Immediately executes the policy against the specified target objects by using the specified evaluation mode.
	Evaluate(AdHocPolicyEvaluationMode, SfcQueryExpression, array<ISfcConnection[])	Evaluates the Policy object and applies policy to the data in identified by the targetConnections parameter.
	GetChildCollection	Do not reference this member directly in your code. It supports the SQL Server infrastructure. (Inherited from SfcInstance.)
	GetDomain	Do not reference this member directly in your code. It supports the SQL Server infrastructure. (Inherited from SfcInstance.)
	GetHashCode	(Inherited from Object.)
	GetObjectFactory	Gets the object factory for the object.
	GetPropertySet	Returns the set of properties for the SfcInstance object. (Inherited from SfcInstance.)
	GetType	(Inherited from Object.)
	GetTypeMetadataImpl	Indicates the domains that override by returning the right TypeMetadata class directly. Do not reference this member directly in your code. It supports the SQL Server infrastructure. (Inherited from SfcInstance.)
	InitializeUIPropertyState	Do not reference this member directly in your code. It supports the SQL Server infrastructure. (Inherited from SfcInstance.)
	OnPropertyMetadataChanges	Invoked whenever the effective value of any SfcInstance metadata is updated. (Inherited from SfcInstance.)
	OnPropertyValueChanges	Invoked whenever the effective value of any SfcInstance property is updated. (Inherited from SfcInstance.)
	ProduceConfigureScript	Gets the condition of a Policy object.
	Refresh	Refreshes the object's properties by reading them from the server. (Inherited from SfcInstance.)
	Rename	Renames the policy.
	ResetKey	Do not reference this member directly in your code. It supports the SQL Server infrastructure. (Inherited from SfcInstance.)
	ScriptAlter	Alters the script that is used to create the policy.
	ScriptAlterWithObjectSet	Alters a previously created ISfcScript object of the Policy object.
	ScriptCreate	Creates a script that is used to create the policy.
	ScriptCreateWithDependencies	Creates the ISfcScript object of the Policy object.
	ScriptCreateWithObjectSet	Creates the ISfcScript object of the ObjectSet.
	ScriptDrop	Drops the script that is used to create the policy.
	ScriptDropWithObjectSet	Drops the ISfcScript object of the ObjectSet.
	Serialize	Serializes the instance to XML. (Inherited from SfcInstance.)
	ToString	Returns a string representation of the instance Urn. (Inherited from SfcInstance.)
	UsesFacet	Determines whether the facet identified by the parameter is contained by the Condition.
	Validate	Validates a Policy object as specified by the mode parameter.

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Events

	Name	Description
	ConnectionProcessingFinished	Represents the event activated when connection processing completes.
	ConnectionProcessingStarted	Represents the event activated when connection processing begins.
	PolicyEvaluationFinished	Represents the event activated when policy evaluation completes.
	PolicyEvaluationStarted	Represents the event activated when policy evaluation begins.
	PropertyChanged	CLS-compliant event for property changes. (Inherited from SfcInstance.)
	PropertyMetadataChanged	CLS-compliant event for property metadata changes. (Inherited from SfcInstance.)
	TargetProcessed	Represents the event activated when policy target is processed.

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Fields

	Name	Description
	HelpLinkStringMaxLength	Specifies the maximum length of the link to help text.
	HelpTextStringMaxLength	Specifies the maximum length of the help text.

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Explicit Interface Implementations

	Name	Description
	ISfcRenamable.Rename	Renames the instance of Policy identified by the key parameter.
	ISfcRenamable.ScriptRename	Renames a script in the policy.
	ISfcValidate.Validate	Validates a Policy object.

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Remarks

A policy represents the relationship between an individual object or a target set of objects and a condition.

A target is an entity on an instance of SQL Server. It could be the instance of SQL Server, or a component of it, such as a database or a table.

A condition is a relationship between a facet and a Boolean expression that determine the state of the facet. A facet is a dimension of a target. For example, the target could be an instance of SQL Server, the facet is Database Mail, the expression specifies that it is installed on the instance and the condition is that Database Mail is installed. Thus, the policy is that Database Mail is installed on the specified instance of SQL Server.

The evaluation mode of the policy determines how and when the policy is checked and enforced.

Using the Policy object, you can manage the following characteristics of a policy:

Condition
Evaluation mode
Schedule
Target set filter using XPath expression
A job on evaluation success
A job on evaluation failure
A policy group

Examples

Policy p = new Policy(ps, policyName);
p.AutomatedPolicyEvaluationMode = execMode;
p.Condition = condition.Name;
p.ScheduleUid = schedule.ScheduleUid;
if (execMode != AutomatedPolicyEvaluationMode.None) p.Enabled = true;
p.Create();

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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