org.osgi.service.resourcemonitoring

Interface ResourceMonitoringService

public interface ResourceMonitoringService

It manages the Resource Context instances. It is available through the OSGi service registry. This service holds the existing Resource Context instances. Resource Context instances are created by calling the createContext(String, ResourceContext) method.

Field Summary

Fields

Modifier and Type	Field and Description
static String	FRAMEWORK_CONTEXT_NAME The name of the special, optional resource context, representing the whole OSGi framework.
static String	RES_TYPE_CPU The name of the CPU resource type, used to monitor and control the CPU time used by a resource context.
static String	RES_TYPE_DISK_STORAGE The name of the disk storage resource type, used to monitor and control the size of the persistent storage used by a resource context.
static String	RES_TYPE_MEMORY The name of the memory resource type, used to monitor and control the size of the java heap used by a resource context.
static String	RES_TYPE_SOCKET The name of the socket resource type, used to monitor and control the number of existing sockets used by a resource context.
static String	RES_TYPE_THREADS The name of the threads resource type, used to monitor and control the number of threads created by a resource context.
static String	SYSTEM_CONTEXT_NAME The name of the Resource Context associated with System bundle (bundle 0).

Method Summary

Modifier and Type	Method and Description
ResourceContext	createContext(String name, ResourceContext template) Creates a new ResourceContext.
ResourceContext	getContext(long bundleId) Returns the ResourceContext associated to the provided bundle id.
ResourceContext	getContext(String name) Returns the context with the specified resource context name.
String[]	getSupportedTypes() Returns a list with the supported resource type names.
ResourceContext[]	listContext() Lists all available resource contexts.

Field Detail

RES_TYPE_THREADS

static final String RES_TYPE_THREADS

The name of the threads resource type, used to monitor and control the number of threads created by a resource context. ResourceMonitoringService implementations must create ThreadMonitor instances for this resource type.

See Also:

Constant Field Values

RES_TYPE_CPU

static final String RES_TYPE_CPU

The name of the CPU resource type, used to monitor and control the CPU time used by a resource context. ResourceMonitoringService implementations must create CPUMonitor instances for this resource type.

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Constant Field Values

RES_TYPE_DISK_STORAGE

static final String RES_TYPE_DISK_STORAGE

The name of the disk storage resource type, used to monitor and control the size of the persistent storage used by a resource context. ResourceMonitoringService implementations must create DiskStorageMonitor instances for this resource type.

See Also:

Constant Field Values

RES_TYPE_MEMORY

static final String RES_TYPE_MEMORY

The name of the memory resource type, used to monitor and control the size of the java heap used by a resource context. ResourceMonitoringService implementations must create MemoryMonitor instances for this resource type.

See Also:

Constant Field Values

RES_TYPE_SOCKET

static final String RES_TYPE_SOCKET

The name of the socket resource type, used to monitor and control the number of existing sockets used by a resource context. ResourceMonitoringService implementations must create SocketMonitor instances for this resource type.

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Constant Field Values

FRAMEWORK_CONTEXT_NAME

static final String FRAMEWORK_CONTEXT_NAME

The name of the special, optional resource context, representing the whole OSGi framework.

See Also:

Constant Field Values

SYSTEM_CONTEXT_NAME

static final String SYSTEM_CONTEXT_NAME

The name of the Resource Context associated with System bundle (bundle 0).

See Also:

Constant Field Values

Method Detail

listContext

ResourceContext[] listContext()

Lists all available resource contexts. The list will contain the special FRAMEWORK_CONTEXT_NAME context and the SYSTEM_CONTEXT_NAME context, if it is supported.

Returns:

An array of ResourceContext objects, or an empty array, if no contexts have been created.

createContext

ResourceContext createContext(String name,
                              ResourceContext template)

Creates a new ResourceContext.

A ResourceContextEvent with type ResourceContextEvent.RESOURCE_CONTEXT_CREATED will be sent.

Parameters:

name - The name identifying the context. Names must be unique within the framework instance.

template - If a template is provided, the new resource context will inherit all resource monitoring settings (enabled monitors, thresholds) from the template.

Returns:

A new ResourceContext instance.

Throws:

IllegalArgumentException - if a problem occurred, for example if the name is already used.

getContext

ResourceContext getContext(String name)

Returns the context with the specified resource context name.

Parameters:

name - The resource context name

Returns:

An existing ResourceContext with the specified name, or null if such a context doesn't exist

getContext

ResourceContext getContext(long bundleId)

Returns the ResourceContext associated to the provided bundle id.

Parameters:

bundleId - bundle identifier

Returns:

the ResourceContext associated to bundle b or null if the bundle b does not belong to a Resource Context.

getSupportedTypes

String[] getSupportedTypes()

Returns a list with the supported resource type names.

Returns:

An array containing the names of all resource types that this ResourceMonitoringService implementation supports.