org.osgi.service.resourcemonitoring

Interface ResourceMonitorFactory<T>

Type Parameters:

T - The type for the Resource.

public interface ResourceMonitorFactory<T>

A Resource Monitor Factory is a service that provides Resource Monitor instances of a specific resource type (for example, CPUMonitor, MemoryMonitor...) for every Resource Context. Every Resource Monitor Factory service is registered with the RESOURCE_TYPE_PROPERTY mandatory property. This property indicates which type of Resource Monitor a Resource Monitor Factory is able to create. The type can also be retrieved through a call to getType(). The type MUST be unique (two Resource Monitor Factory instances MUST not have the same type).

Field Summary

Fields

Modifier and Type	Field and Description
static String	RESOURCE_TYPE_PROPERTY Resource type property.

Method Summary

Modifier and Type	Method and Description
ResourceMonitor<T>	createResourceMonitor(ResourceContext resourceContext) Creates a new ResourceMonitor instance.
String	getType() Returns the type of ResourceMonitor instance this factory is able to create.

Field Detail

RESOURCE_TYPE_PROPERTY

static final String RESOURCE_TYPE_PROPERTY

Resource type property. The value is of type String. For example, ResourceMonitoringService.RES_TYPE_CPU

See Also:

Constant Field Values

Method Detail

getType

String getType()

Returns the type of ResourceMonitor instance this factory is able to create.

Returns:

factory type

createResourceMonitor

ResourceMonitor<T> createResourceMonitor(ResourceContext resourceContext)
                                  throws ResourceMonitorException

Creates a new ResourceMonitor instance. This instance is associated with the ResourceContext instance provided as argument ( ResourceContext.addResourceMonitor(ResourceMonitor) is called by the factory). The newly ResourceMonitor instance is disabled. It can be enabled by calling ResourceMonitor.enable().

Parameters:

resourceContext - ResourceContext instance associated with the newly created ResourceMonitor instance

Returns:

a ResourceMonitor instance

Throws:

ResourceMonitorException - If the factory is unable to create a ResourceMonitor For example, when a ResourceMonitor of this type already exists for this ResourceContext