org.rhq.enterprise.server.resource
Class ResourceAvailabilityManagerBean

java.lang.Object
  org.rhq.enterprise.server.resource.ResourceAvailabilityManagerBean

All Implemented Interfaces:

ResourceAvailabilityManagerLocal

public class ResourceAvailabilityManagerBean
extends Object
implements ResourceAvailabilityManagerLocal

A manager that provides methods for manipulating and querying the cached current availability for Resources.

Author:

Joseph Marques

Constructor Summary

ResourceAvailabilityManagerBean()

Method Summary

org.rhq.core.domain.measurement.ResourceAvailability	getLatestAvailability(int resourceId) Returns the latest availability for the given Resource
org.rhq.core.domain.measurement.AvailabilityType	getLatestAvailabilityType(org.rhq.core.domain.auth.Subject whoami, int resourceId) Returns the latest availability type for the given resource.
void	init()
void	insertNeededAvailabilityForImportedResources(List<Integer> resourceIds) The first time an agent is started and its platform and top-level servers are discovered, the DiscoveryBossBean.mergeInventoryReport(InventoryReport) will use the EntityManager to persist the resource.
void	updateAllResourcesAvailabilitiesForAgent(int agentId, org.rhq.core.domain.measurement.AvailabilityType availabilityType) Marks all resources managed by the specified agent as down

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourceAvailabilityManagerBean

public ResourceAvailabilityManagerBean()

Method Detail

init

@PostConstruct
public void init()

insertNeededAvailabilityForImportedResources

public void insertNeededAvailabilityForImportedResources(List<Integer> resourceIds)

Description copied from interface: ResourceAvailabilityManagerLocal

The first time an agent is started and its platform and top-level servers are discovered, the DiscoveryBossBean.mergeInventoryReport(InventoryReport) will use the EntityManager to persist the resource. A PostPersist hook exists on the Resource entity to create a corresponding default ResourceAvailability entity. However, when a platform or top-level server is removed from inventory, the agent might rediscover the resource so quickly that InventoryReport merges the resource instead of persisting new ones, bypassing the PostPersist hook. As a result, this method should be called when resources are imported from the auto-discovery portlet (the InventoryStatus is changed from NEW to COMMITTED, which will add the necessary default ResourceAvailability objects to those resources missing them.

Specified by:

insertNeededAvailabilityForImportedResources in interface ResourceAvailabilityManagerLocal

Parameters:

resourceIds - a list of resource ids which should have default ResourceAvailability objects created for them, only if the corresponding data doesn't already exist.

getLatestAvailabilityType

public org.rhq.core.domain.measurement.AvailabilityType getLatestAvailabilityType(org.rhq.core.domain.auth.Subject whoami,
                                                                                  int resourceId)

Description copied from interface: ResourceAvailabilityManagerLocal

Returns the latest availability type for the given resource. This tells you the currently known state of a resource - whether it is UP or DOWN.

Specified by:

getLatestAvailabilityType in interface ResourceAvailabilityManagerLocal

Parameters:

whoami - the user asking for the data

resourceId - the id of the resource

Returns:

the latest availability type for the given resource, null if not known

getLatestAvailability

public org.rhq.core.domain.measurement.ResourceAvailability getLatestAvailability(int resourceId)

Description copied from interface: ResourceAvailabilityManagerLocal

Returns the latest availability for the given Resource

Specified by:

getLatestAvailability in interface ResourceAvailabilityManagerLocal

Parameters:

resourceId - the id of the resource

Returns:

the latest availability for the given Resource

updateAllResourcesAvailabilitiesForAgent

public void updateAllResourcesAvailabilitiesForAgent(int agentId,
                                                     org.rhq.core.domain.measurement.AvailabilityType availabilityType)

Description copied from interface: ResourceAvailabilityManagerLocal

Marks all resources managed by the specified agent as down

Specified by:

updateAllResourcesAvailabilitiesForAgent in interface ResourceAvailabilityManagerLocal

Parameters:

agentId - the id of the agent