RelationService (Java 2 Platform Ent. Ed. v1.4) - Java Platform, Enterprise Edition v1.4 API Specifications

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javax.management.relation
Class RelationService

java.lang.Object
  javax.management.NotificationBroadcasterSupport
      javax.management.relation.RelationService

All Implemented Interfaces:: EventListener, MBeanRegistration, NotificationBroadcaster, NotificationEmitter, NotificationListener, RelationServiceMBean

public class RelationService
extends NotificationBroadcasterSupport
implements RelationServiceMBean, MBeanRegistration, NotificationListener

The Relation Service is in charge of creating and deleting relation types and relations, of handling the consistency and of providing query mechanisms.

It implements the NotificationBroadcaster by extending NotificationBroadcasterSupport to send notifications when a relation is removed from it.

It implements the NotificationListener interface to be able to receive notifications concerning unregistration of MBeans referenced in relation roles and of relation MBeans.

It implements the MBeanRegistration interface to be able to retrieve its ObjectName and MBean Server.

Constructor Summary

RelationService(boolean theImmediatePurgeFlg)
          Constructor.

Method Summary

void addRelation(ObjectName theRelObjectName)
          Adds an MBean created by the user (and registered by him in the MBean Server) as a relation in the Relation Service.

void addRelationType(RelationType theRelTypeObj)
          Adds given object as a relation type.

Integer checkRoleReading(String theRoleName, String theRelTypeName)
          Checks if given Role can be read in a relation of the given type.

Integer checkRoleWriting(Role theRole, String theRelTypeName, Boolean theInitFlg)
          Checks if given Role can be set in a relation of given type.

void createRelation(String theRelId, String theRelTypeName, RoleList theRoleList)
          Creates a simple relation (represented by a RelationSupport object) of given relation type, and adds it in the Relation Service.

void createRelationType(String theRelTypeName, RoleInfo[] theRoleInfoArray)
          Creates a relation type (a RelationTypeSupport object) with given role infos (provided by the RoleInfo objects), and adds it in the Relation Service.

Map findAssociatedMBeans(ObjectName theMBeanName, String theRelTypeName, String theRoleName)
          Retrieves the MBeans associated to given one in a relation.

Map findReferencingRelations(ObjectName theMBeanName, String theRelTypeName, String theRoleName)
          Retrieves the relations where a given MBean is referenced.

List findRelationsOfType(String theRelTypeName)
          Returns the relation ids for relations of the given type.

List getAllRelationIds()
          Returns all the relation ids for all the relations handled by the Relation Service.

List getAllRelationTypeNames()
          Retrieves names of all known relation types.

RoleResult getAllRoles(String theRelId)
          Returns all roles present in the relation.

MBeanNotificationInfo[] getNotificationInfo()
          Returns a NotificationInfo object containing the name of the Java class of the notification and the notification types sent.

boolean getPurgeFlag()
          Returns the flag to indicate if when a notification is received for the unregistration of an MBean referenced in a relation, if an immediate "purge" of the relations (look for the relations no longer valid) has to be performed , or if that will be performed only when the purgeRelations method will be explicitly called.

Map getReferencedMBeans(String theRelId)
          Retrieves MBeans referenced in the various roles of the relation.

String getRelationTypeName(String theRelId)
          Returns name of associated relation type for given relation.

List getRole(String theRelId, String theRoleName)
          Retrieves role value for given role name in given relation.

Integer getRoleCardinality(String theRelId, String theRoleName)
          Retrieves the number of MBeans currently referenced in the given role.

RoleInfo getRoleInfo(String theRelTypeName, String theRoleInfoName)
          Retrieves role info for given role name of a given relation type.

List getRoleInfos(String theRelTypeName)
          Retrieves list of role infos (RoleInfo objects) of a given relation type.

RoleResult getRoles(String theRelId, String[] theRoleNameArray)
          Retrieves values of roles with given names in given relation.

void handleNotification(Notification theNtf, Object theHandback)
          Invoked when a JMX notification occurs.

Boolean hasRelation(String theRelId)
          Checks if there is a relation identified in Relation Service with given relation id.

void isActive()
          Checks if the Relation Service is active.

String isRelation(ObjectName theObjName)
          Returns the relation id associated to the given ObjectName if the MBean has been added as a relation in the Relation Service.

ObjectName isRelationMBean(String theRelId)
          If the relation is represented by an MBean (created by the user and added as a relation in the Relation Service), returns the ObjectName of the MBean.

void postDeregister()
          Allows the MBean to perform any operations needed after having been unregistered in the MBean server.

void postRegister(Boolean registrationDone)
          Allows the MBean to perform any operations needed after having been registered in the MBean server or after the registration has failed.

void preDeregister()
          Allows the MBean to perform any operations it needs before being unregistered by the MBean server.

ObjectName preRegister(MBeanServer server, ObjectName name)
          Allows the MBean to perform any operations it needs before being registered in the MBean server.

void purgeRelations()
          Purges the relations.

void removeRelation(String theRelId)
          Removes given relation from the Relation Service.

void removeRelationType(String theRelTypeName)
          Removes given relation type from Relation Service.

void sendRelationCreationNotification(String theRelId)
          Sends a notification (RelationNotification) for a relation creation.

void sendRelationRemovalNotification(String theRelId, List theUnregMBeanList)
          Sends a notification (RelationNotification) for a relation removal.

void sendRoleUpdateNotification(String theRelId, Role theNewRole, List theOldRoleValue)
          Sends a notification (RelationNotification) for a role update in the given relation.

void setPurgeFlag(boolean thePurgeFlg)
          Sets the flag to indicate if when a notification is received for the unregistration of an MBean referenced in a relation, if an immediate "purge" of the relations (look for the relations no longer valid) has to be performed , or if that will be performed only when the purgeRelations method will be explicitly called.

void setRole(String theRelId, Role theRole)
          Sets the given role in given relation.

RoleResult setRoles(String theRelId, RoleList theRoleList)
          Sets the given roles in given relation.

void updateRoleMap(String theRelId, Role theNewRole, List theOldRoleValue)
          Handles update of the Relation Service role map for the update of given role in given relation.

Methods inherited from class javax.management.NotificationBroadcasterSupport

addNotificationListener, handleNotification, removeNotificationListener, removeNotificationListener, sendNotification

Methods inherited from class java.lang.Object

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

Constructor Detail

RelationService

public RelationService(boolean theImmediatePurgeFlg)

Constructor.
Parameters:: theImmediatePurgeFlg - flag to indicate when a notification is received for the unregistration of an MBean referenced in a relation, if an immediate "purge" of the relations (look for the relations no longer valid) has to be performed , or if that will be performed only when the purgeRelations method will be explicitly called.
true is immediate purge.

Method Detail

isActive

public void isActive()
              throws RelationServiceNotRegisteredException

Checks if the Relation Service is active. Current condition is that the Relation Service must be registered in the MBean Server

Specified by:: isActive in interface RelationServiceMBean

Throws:: RelationServiceNotRegisteredException - if it is not registered

preRegister

public ObjectName preRegister(MBeanServer server,
                              ObjectName name)
                       throws Exception

Description copied from interface: MBeanRegistration

Allows the MBean to perform any operations it needs before being registered in the MBean server. If the name of the MBean is not specified, the MBean can provide a name for its registration. If any exception is raised, the MBean will not be registered in the MBean server.

Specified by:: preRegister in interface MBeanRegistration

Parameters:: server - The MBean server in which the MBean will be registered.; name - The object name of the MBean. This name is null if the name parameter to one of the createMBean or registerMBean methods in the MBeanServer interface is null. In that case, this method must return a non-null ObjectName for the new MBean.
Returns:: The name under which the MBean is to be registered. This value must not be null. If the name parameter is not null, it will usually but not necessarily be the returned value.
Throws:: Exception - This exception will be caught by the MBean server and re-thrown as an MBeanRegistrationException or a RuntimeMBeanException.

postRegister

public void postRegister(Boolean registrationDone)

Description copied from interface: MBeanRegistration

Allows the MBean to perform any operations needed after having been registered in the MBean server or after the registration has failed.

Specified by:: postRegister in interface MBeanRegistration

Parameters:: registrationDone - Indicates whether or not the MBean has been successfully registered in the MBean server. The value false means that the registration phase has failed.

preDeregister

public void preDeregister()
                   throws Exception

Description copied from interface: MBeanRegistration

Allows the MBean to perform any operations it needs before being unregistered by the MBean server.

Specified by:: preDeregister in interface MBeanRegistration

Throws:: Exception - This exception will be caught by the MBean server and re-thrown as an MBeanRegistrationException or a RuntimeMBeanException.

postDeregister

public void postDeregister()

Description copied from interface: MBeanRegistration

Allows the MBean to perform any operations needed after having been unregistered in the MBean server.

Specified by:: postDeregister in interface MBeanRegistration

getPurgeFlag

public boolean getPurgeFlag()

Returns the flag to indicate if when a notification is received for the unregistration of an MBean referenced in a relation, if an immediate "purge" of the relations (look for the relations no longer valid) has to be performed , or if that will be performed only when the purgeRelations method will be explicitly called.

true is immediate purge.

Specified by:: getPurgeFlag in interface RelationServiceMBean

Returns:: true if purges are automatic.
See Also:: setPurgeFlag(boolean)

setPurgeFlag

public void setPurgeFlag(boolean thePurgeFlg)

Sets the flag to indicate if when a notification is received for the unregistration of an MBean referenced in a relation, if an immediate "purge" of the relations (look for the relations no longer valid) has to be performed , or if that will be performed only when the purgeRelations method will be explicitly called.

true is immediate purge.

Specified by:: setPurgeFlag in interface RelationServiceMBean

Parameters:: thePurgeFlg - flag
See Also:: getPurgeFlag()

createRelationType

public void createRelationType(String theRelTypeName,
                               RoleInfo[] theRoleInfoArray)
                        throws IllegalArgumentException,
                               InvalidRelationTypeException

Creates a relation type (a RelationTypeSupport object) with given role infos (provided by the RoleInfo objects), and adds it in the Relation Service.

Specified by:: createRelationType in interface RelationServiceMBean

Parameters:

theRelTypeName - name of the relation type

theRoleInfoArray - array of role infos

Throws:

IllegalArgumentException - if null parameter

InvalidRelationTypeException - If:

- there is already a relation type with that name

- the same name has been used for two different role infos

- no role info provided

- one null role info provided

addRelationType

public void addRelationType(RelationType theRelTypeObj)
                     throws IllegalArgumentException,
                            InvalidRelationTypeException

Adds given object as a relation type. The object is expected to implement the RelationType interface.

Specified by:: addRelationType in interface RelationServiceMBean

Parameters:

theRelTypeObj - relation type object (implementing the RelationType interface)

Throws:

IllegalArgumentException - if null parameter

InvalidRelationTypeException - if:

- the same name has been used for two different roles

- no role info provided

- one null role info provided

- there is already a relation type with that name

getAllRelationTypeNames

public List getAllRelationTypeNames()

Retrieves names of all known relation types.

Specified by:: getAllRelationTypeNames in interface RelationServiceMBean

Returns:: ArrayList of relation type names (Strings)

getRoleInfos

public List getRoleInfos(String theRelTypeName)
                  throws IllegalArgumentException,
                         RelationTypeNotFoundException

Retrieves list of role infos (RoleInfo objects) of a given relation type.

Specified by:: getRoleInfos in interface RelationServiceMBean

Parameters:: theRelTypeName - name of relation type
Returns:: ArrayList of RoleInfo.
Throws:: IllegalArgumentException - if null parameter; RelationTypeNotFoundException - if there is no relation type with that name.

getRoleInfo

public RoleInfo getRoleInfo(String theRelTypeName,
                            String theRoleInfoName)
                     throws IllegalArgumentException,
                            RelationTypeNotFoundException,
                            RoleInfoNotFoundException

Retrieves role info for given role name of a given relation type.

Specified by:: getRoleInfo in interface RelationServiceMBean

Parameters:: theRelTypeName - name of relation type; theRoleInfoName - name of role
Returns:: RoleInfo object.
Throws:: IllegalArgumentException - if null parameter; RelationTypeNotFoundException - if the relation type is not known in the Relation Service; RoleInfoNotFoundException - if the role is not part of the relation type.

removeRelationType

public void removeRelationType(String theRelTypeName)
                        throws RelationServiceNotRegisteredException,
                               IllegalArgumentException,
                               RelationTypeNotFoundException

Removes given relation type from Relation Service.

The relation objects of that type will be removed from the Relation Service.

Specified by:: removeRelationType in interface RelationServiceMBean

Parameters:: theRelTypeName - name of the relation type to be removed
Throws:: RelationServiceNotRegisteredException - if the Relation Service is not registered in the MBean Server; IllegalArgumentException - if null parameter; RelationTypeNotFoundException - If there is no relation type with that name

createRelation

public void createRelation(String theRelId,
                           String theRelTypeName,
                           RoleList theRoleList)
                    throws RelationServiceNotRegisteredException,
                           IllegalArgumentException,
                           RoleNotFoundException,
                           InvalidRelationIdException,
                           RelationTypeNotFoundException,
                           InvalidRoleValueException

Creates a simple relation (represented by a RelationSupport object) of given relation type, and adds it in the Relation Service.

Roles are initialized according to the role list provided in parameter. The ones not initialized in this way are set to an empty ArrayList of ObjectNames.

A RelationNotification, with type RELATION_BASIC_CREATION, is sent.

Specified by:: createRelation in interface RelationServiceMBean

Parameters:

theRelId - relation identifier, to identify uniquely the relation inside the Relation Service

theRelTypeName - name of the relation type (has to be created in the Relation Service)

theRoleList - role list to initialize roles of the relation (can be null).

Throws:

RelationServiceNotRegisteredException - if the Relation Service is not registered in the MBean Server

IllegalArgumentException - if null parameter, except the role lis which can be null if no role initialization

RoleNotFoundException - if a value is provided for a role that does not exist in the relation type

InvalidRelationIdException - if relation id already used

RelationTypeNotFoundException - if relation type not known in Relation Service

InvalidRoleValueException - if:

- the same role name is used for two different roles

- the number of referenced MBeans in given value is less than expected minimum degree

- the number of referenced MBeans in provided value exceeds expected maximum degree

- one referenced MBean in the value is not an Object of the MBean class expected for that role

- an MBean provided for that role does not exist

addRelation

public void addRelation(ObjectName theRelObjectName)
                 throws IllegalArgumentException,
                        RelationServiceNotRegisteredException,
                        NoSuchMethodException,
                        InvalidRelationIdException,
                        InstanceNotFoundException,
                        InvalidRelationServiceException,
                        RelationTypeNotFoundException,
                        RoleNotFoundException,
                        InvalidRoleValueException

Adds an MBean created by the user (and registered by him in the MBean Server) as a relation in the Relation Service.

To be added as a relation, the MBean must conform to the following:

- implement the Relation interface

- have for RelationService ObjectName the ObjectName of current Relation Service

- have a relation id unique and unused in current Relation Service

- have for relation type a relation type created in the Relation Service

- have roles conforming to the role info provided in the relation type.

Specified by:: addRelation in interface RelationServiceMBean

Parameters:

theRelObjectName - ObjectName of the relation MBean to be added.

Throws:

IllegalArgumentException - if null parameter

RelationServiceNotRegisteredException - if the Relation Service is not registered in the MBean Server

NoSuchMethodException - If the MBean does not implement the Relation interface

InvalidRelationIdException - if:

- no relation identifier in MBean

- the relation identifier is already used in the Relation Service

InstanceNotFoundException - if the MBean for given ObjectName has not been registered

InvalidRelationServiceException - if:

- no Relation Service name in MBean

- the Relation Service name in the MBean is not the one of the current Relation Service

RelationTypeNotFoundException - if:

- no relation type name in MBean

- the relation type name in MBean does not correspond to a relation type created in the Relation Service

InvalidRoleValueException - if:

- the number of referenced MBeans in a role is less than expected minimum degree

- the number of referenced MBeans in a role exceeds expected maximum degree

- one referenced MBean in the value is not an Object of the MBean class expected for that role

- an MBean provided for a role does not exist

RoleNotFoundException - if a value is provided for a role that does not exist in the relation type

isRelationMBean

public ObjectName isRelationMBean(String theRelId)
                           throws IllegalArgumentException,
                                  RelationNotFoundException

If the relation is represented by an MBean (created by the user and added as a relation in the Relation Service), returns the ObjectName of the MBean.

Specified by:: isRelationMBean in interface RelationServiceMBean

Parameters:: theRelId - relation id identifying the relation
Returns:: ObjectName of the corresponding relation MBean, or null if the relation is not an MBean.
Throws:: IllegalArgumentException - if null parameter; RelationNotFoundException - there is no relation associated to that id

isRelation

public String isRelation(ObjectName theObjName)
                  throws IllegalArgumentException

Returns the relation id associated to the given ObjectName if the MBean has been added as a relation in the Relation Service.

Specified by:: isRelation in interface RelationServiceMBean

Parameters:: theObjName - ObjectName of supposed relation
Returns:: relation id (String) or null (if the ObjectName is not a relation handled by the Relation Service)
Throws:: IllegalArgumentException - if null parameter

hasRelation

public Boolean hasRelation(String theRelId)
                    throws IllegalArgumentException

Checks if there is a relation identified in Relation Service with given relation id.

Specified by:: hasRelation in interface RelationServiceMBean

Parameters:: theRelId - relation id identifying the relation
Returns:: boolean: true if there is a relation, false else
Throws:: IllegalArgumentException - if null parameter

getAllRelationIds

public List getAllRelationIds()

Returns all the relation ids for all the relations handled by the Relation Service.

Specified by:: getAllRelationIds in interface RelationServiceMBean

Returns:: ArrayList of String

checkRoleReading

public Integer checkRoleReading(String theRoleName,
                                String theRelTypeName)
                         throws IllegalArgumentException,
                                RelationTypeNotFoundException

Checks if given Role can be read in a relation of the given type.

Specified by:: checkRoleReading in interface RelationServiceMBean

Parameters:

theRoleName - name of role to be checked

theRelTypeName - name of the relation type

Returns:

an Integer wrapping an integer corresponding to possible problems represented as constants in RoleUnresolved:

- 0 if role can be read

- integer corresponding to RoleStatus.NO_ROLE_WITH_NAME

- integer corresponding to RoleStatus.ROLE_NOT_READABLE

Throws:

IllegalArgumentException - if null parameter

RelationTypeNotFoundException - if the relation type is not known in the Relation Service

checkRoleWriting

public Integer checkRoleWriting(Role theRole,
                                String theRelTypeName,
                                Boolean theInitFlg)
                         throws IllegalArgumentException,
                                RelationTypeNotFoundException

Checks if given Role can be set in a relation of given type.

Specified by:: checkRoleWriting in interface RelationServiceMBean

Parameters:

theRole - role to be checked

theRelTypeName - name of relation type

theInitFlg - flag to specify that the checking is done for the initialization of a role, write access shall not be verified.

Returns:

an Integer wrapping an integer corresponding to possible problems represented as constants in RoleUnresolved:

- 0 if role can be set

- integer corresponding to RoleStatus.NO_ROLE_WITH_NAME

- integer for RoleStatus.ROLE_NOT_WRITABLE

- integer for RoleStatus.LESS_THAN_MIN_ROLE_DEGREE

- integer for RoleStatus.MORE_THAN_MAX_ROLE_DEGREE

- integer for RoleStatus.REF_MBEAN_OF_INCORRECT_CLASS

- integer for RoleStatus.REF_MBEAN_NOT_REGISTERED

Throws:

IllegalArgumentException - if null parameter

RelationTypeNotFoundException - if unknown relation type

sendRelationCreationNotification

public void sendRelationCreationNotification(String theRelId)
                                      throws IllegalArgumentException,
                                             RelationNotFoundException

Sends a notification (RelationNotification) for a relation creation. The notification type is:

- RelationNotification.RELATION_BASIC_CREATION if the relation is an object internal to the Relation Service

- RelationNotification.RELATION_MBEAN_CREATION if the relation is a MBean added as a relation.

The source object is the Relation Service itself.

It is called in Relation Service createRelation() and addRelation() methods.

Specified by:: sendRelationCreationNotification in interface RelationServiceMBean

Parameters:: theRelId - relation identifier of the updated relation
Throws:: IllegalArgumentException - if null parameter; RelationNotFoundException - if there is no relation for given relation id

sendRoleUpdateNotification

public void sendRoleUpdateNotification(String theRelId,
                                       Role theNewRole,
                                       List theOldRoleValue)
                                throws IllegalArgumentException,
                                       RelationNotFoundException

Sends a notification (RelationNotification) for a role update in the given relation. The notification type is:

- RelationNotification.RELATION_BASIC_UPDATE if the relation is an object internal to the Relation Service

- RelationNotification.RELATION_MBEAN_UPDATE if the relation is a MBean added as a relation.

The source object is the Relation Service itself.

It is called in relation MBean setRole() (for given role) and setRoles() (for each role) methods (implementation provided in RelationSupport class).

It is also called in Relation Service setRole() (for given role) and setRoles() (for each role) methods.

Specified by:: sendRoleUpdateNotification in interface RelationServiceMBean

Parameters:: theRelId - relation identifier of the updated relation; theNewRole - new role (name and new value); theOldRoleValue - old role value (ArrayList of ObjectName objects)
Throws:: IllegalArgumentException - if null parameter; RelationNotFoundException - if there is no relation for given relation id

sendRelationRemovalNotification

public void sendRelationRemovalNotification(String theRelId,
                                            List theUnregMBeanList)
                                     throws IllegalArgumentException,
                                            RelationNotFoundException

Sends a notification (RelationNotification) for a relation removal. The notification type is:

- RelationNotification.RELATION_BASIC_REMOVAL if the relation is an object internal to the Relation Service

- RelationNotification.RELATION_MBEAN_REMOVAL if the relation is a MBean added as a relation.

The source object is the Relation Service itself.

It is called in Relation Service removeRelation() method.

Specified by:: sendRelationRemovalNotification in interface RelationServiceMBean

Parameters:: theRelId - relation identifier of the updated relation; theUnregMBeanList - ArrayList of ObjectNames of MBeans expected to be unregistered due to relation removal (can be null)
Throws:: IllegalArgumentException - if null parameter; RelationNotFoundException - if there is no relation for given relation id

updateRoleMap

public void updateRoleMap(String theRelId,
                          Role theNewRole,
                          List theOldRoleValue)
                   throws IllegalArgumentException,
                          RelationServiceNotRegisteredException,
                          RelationNotFoundException

Handles update of the Relation Service role map for the update of given role in given relation.

It is called in relation MBean setRole() (for given role) and setRoles() (for each role) methods (implementation provided in RelationSupport class).

It is also called in Relation Service setRole() (for given role) and setRoles() (for each role) methods.

To allow the Relation Service to maintain the consistency (in case of MBean unregistration) and to be able to perform queries, this method must be called when a role is updated.

Specified by:: updateRoleMap in interface RelationServiceMBean

Parameters:: theRelId - relation identifier of the updated relation; theNewRole - new role (name and new value); theOldRoleValue - old role value (ArrayList of ObjectName objects)
Throws:: IllegalArgumentException - if null parameter; RelationServiceNotRegisteredException - if the Relation Service is not registered in the MBean Server; RelationNotFoundException - if no relation for given id.

removeRelation

public void removeRelation(String theRelId)
                    throws RelationServiceNotRegisteredException,
                           IllegalArgumentException,
                           RelationNotFoundException

Removes given relation from the Relation Service.

A RelationNotification notification is sent, its type being:

- RelationNotification.RELATION_BASIC_REMOVAL if the relation was only internal to the Relation Service

- RelationNotification.RELATION_MBEAN_REMOVAL if the relation is registered as an MBean.

For MBeans referenced in such relation, nothing will be done,

Specified by:: removeRelation in interface RelationServiceMBean

Parameters:: theRelId - relation id of the relation to be removed
Throws:: RelationServiceNotRegisteredException - if the Relation Service is not registered in the MBean Server; IllegalArgumentException - if null parameter; RelationNotFoundException - if no relation corresponding to given relation id

purgeRelations

public void purgeRelations()
                    throws RelationServiceNotRegisteredException

Purges the relations.

Depending on the purgeFlag value, this method is either called automatically when a notification is received for the unregistration of an MBean referenced in a relation (if the flag is set to true), or not (if the flag is set to false).

In that case it is up to the user to call it to maintain the consistency of the relations. To be kept in mind that if an MBean is unregistered and the purge not done immediately, if the ObjectName is reused and assigned to another MBean referenced in a relation, calling manually this purgeRelations() method will cause trouble, as will consider the ObjectName as corresponding to the unregistered MBean, not seeing the new one.

The behavior depends on the cardinality of the role where the unregistered MBean is referenced:

- if removing one MBean reference in the role makes its number of references less than the minimum degree, the relation has to be removed.

- if the remaining number of references after removing the MBean reference is still in the cardinality range, keep the relation and update it calling its handleMBeanUnregistration() callback.

Specified by:: purgeRelations in interface RelationServiceMBean

Throws:: RelationServiceNotRegisteredException - if the Relation Service is not registered in the MBean Server.

findReferencingRelations

public Map findReferencingRelations(ObjectName theMBeanName,
                                    String theRelTypeName,
                                    String theRoleName)
                             throws IllegalArgumentException

Retrieves the relations where a given MBean is referenced.

This corresponds to the CIM "References" and "ReferenceNames" operations.

Specified by:: findReferencingRelations in interface RelationServiceMBean

Parameters:: theMBeanName - ObjectName of MBean; theRelTypeName - can be null; if specified, only the relations of that type will be considered in the search. Else all relation types are considered.; theRoleName - can be null; if specified, only the relations where the MBean is referenced in that role will be returned. Else all roles are considered.
Returns:: an HashMap, where the keys are the relation ids of the relations where the MBean is referenced, and the value is, for each key, an ArrayList of role names (as an MBean can be referenced in several roles in the same relation).
Throws:: IllegalArgumentException - if null parameter

findAssociatedMBeans

public Map findAssociatedMBeans(ObjectName theMBeanName,
                                String theRelTypeName,
                                String theRoleName)
                         throws IllegalArgumentException

Retrieves the MBeans associated to given one in a relation.

This corresponds to CIM Associators and AssociatorNames operations.

Specified by:: findAssociatedMBeans in interface RelationServiceMBean

Parameters:: theMBeanName - ObjectName of MBean; theRelTypeName - can be null; if specified, only the relations of that type will be considered in the search. Else all relation types are considered.; theRoleName - can be null; if specified, only the relations where the MBean is referenced in that role will be considered. Else all roles are considered.
Returns:: an HashMap, where the keys are the ObjectNames of the MBeans associated to given MBean, and the value is, for each key, an ArrayList of the relation ids of the relations where the key MBean is associated to given one (as they can be associated in several different relations).
Throws:: IllegalArgumentException - if null parameter

findRelationsOfType

public List findRelationsOfType(String theRelTypeName)
                         throws IllegalArgumentException,
                                RelationTypeNotFoundException

Returns the relation ids for relations of the given type.

Specified by:: findRelationsOfType in interface RelationServiceMBean

Parameters:: theRelTypeName - relation type name
Returns:: an ArrayList of relation ids.
Throws:: IllegalArgumentException - if null parameter; RelationTypeNotFoundException - if there is no relation type with that name.

getRole

public List getRole(String theRelId,
                    String theRoleName)
             throws RelationServiceNotRegisteredException,
                    IllegalArgumentException,
                    RelationNotFoundException,
                    RoleNotFoundException

Retrieves role value for given role name in given relation.

Specified by:: getRole in interface RelationServiceMBean

Parameters:

theRelId - relation id

theRoleName - name of role

Returns:

the ArrayList of ObjectName objects being the role value

Throws:

RelationServiceNotRegisteredException - if the Relation Service is not registered

IllegalArgumentException - if null parameter

RelationNotFoundException - if no relation with given id

RoleNotFoundException - if:

- there is no role with given name

- the role is not readable.

getRoles

public RoleResult getRoles(String theRelId,
                           String[] theRoleNameArray)
                    throws RelationServiceNotRegisteredException,
                           IllegalArgumentException,
                           RelationNotFoundException

Retrieves values of roles with given names in given relation.

Specified by:: getRoles in interface RelationServiceMBean

Parameters:: theRelId - relation id; theRoleNameArray - array of names of roles to be retrieved
Returns:: a RoleResult object, including a RoleList (for roles succcessfully retrieved) and a RoleUnresolvedList (for roles not retrieved).
Throws:: RelationServiceNotRegisteredException - if the Relation Service is not registered in the MBean Server; IllegalArgumentException - if null parameter; RelationNotFoundException - if no relation with given id
See Also:: setRoles(java.lang.String, javax.management.relation.RoleList)

getAllRoles

public RoleResult getAllRoles(String theRelId)
                       throws IllegalArgumentException,
                              RelationNotFoundException,
                              RelationServiceNotRegisteredException

Returns all roles present in the relation.

Specified by:: getAllRoles in interface RelationServiceMBean

Parameters:: theRelId - relation id
Returns:: a RoleResult object, including a RoleList (for roles succcessfully retrieved) and a RoleUnresolvedList (for roles not readable).
Throws:: IllegalArgumentException - if null parameter; RelationNotFoundException - if no relation for given id; RelationServiceNotRegisteredException - if the Relation Service is not registered in the MBean Server

getRoleCardinality

public Integer getRoleCardinality(String theRelId,
                                  String theRoleName)
                           throws IllegalArgumentException,
                                  RelationNotFoundException,
                                  RoleNotFoundException

Retrieves the number of MBeans currently referenced in the given role.

Specified by:: getRoleCardinality in interface RelationServiceMBean

Parameters:: theRelId - relation id; theRoleName - name of role
Returns:: the number of currently referenced MBeans in that role
Throws:: IllegalArgumentException - if null parameter; RelationNotFoundException - if no relation with given id; RoleNotFoundException - if there is no role with given name

setRole

public void setRole(String theRelId,
                    Role theRole)
             throws RelationServiceNotRegisteredException,
                    IllegalArgumentException,
                    RelationNotFoundException,
                    RoleNotFoundException,
                    InvalidRoleValueException

Sets the given role in given relation.

Will check the role according to its corresponding role definition provided in relation's relation type

The Relation Service will keep track of the change to keep the consistency of relations by handling referenced MBean unregistrations.

Specified by:: setRole in interface RelationServiceMBean

Parameters:

theRelId - relation id

theRole - role to be set (name and new value)

Throws:

RelationServiceNotRegisteredException - if the Relation Service is not registered in the MBean Server

IllegalArgumentException - if null parameter

RelationNotFoundException - if no relation with given id

RoleNotFoundException - if the role does not exist or is not writable

InvalidRoleValueException - if value provided for role is not valid:

- the number of referenced MBeans in given value is less than expected minimum degree

- the number of referenced MBeans in provided value exceeds expected maximum degree

- one referenced MBean in the value is not an Object of the MBean class expected for that role

- an MBean provided for that role does not exist

setRoles

public RoleResult setRoles(String theRelId,
                           RoleList theRoleList)
                    throws RelationServiceNotRegisteredException,
                           IllegalArgumentException,
                           RelationNotFoundException

Sets the given roles in given relation.

Will check the role according to its corresponding role definition provided in relation's relation type

The Relation Service keeps track of the changes to keep the consistency of relations by handling referenced MBean unregistrations.

Specified by:: setRoles in interface RelationServiceMBean

Parameters:: theRelId - relation id; theRoleList - list of roles to be set
Returns:: a RoleResult object, including a RoleList (for roles succcessfully set) and a RoleUnresolvedList (for roles not set).
Throws:: RelationServiceNotRegisteredException - if the Relation Service is not registered in the MBean Server; IllegalArgumentException - if null parameter; RelationNotFoundException - if no relation with given id
See Also:: getRoles(java.lang.String, java.lang.String[])

getReferencedMBeans

public Map getReferencedMBeans(String theRelId)
                        throws IllegalArgumentException,
                               RelationNotFoundException

Retrieves MBeans referenced in the various roles of the relation.

Specified by:: getReferencedMBeans in interface RelationServiceMBean

Parameters:: theRelId - relation id
Returns:: a HashMap mapping:
ObjectName -> ArrayList of String (role names)
Throws:: IllegalArgumentException - if null parameter; RelationNotFoundException - if no relation for given relation id

getRelationTypeName

public String getRelationTypeName(String theRelId)
                           throws IllegalArgumentException,
                                  RelationNotFoundException

Returns name of associated relation type for given relation.

Specified by:: getRelationTypeName in interface RelationServiceMBean

Parameters:: theRelId - relation id
Returns:: the name of the associated relation type.
Throws:: IllegalArgumentException - if null parameter; RelationNotFoundException - if no relation for given relation id

handleNotification

public void handleNotification(Notification theNtf,
                               Object theHandback)

Invoked when a JMX notification occurs. Currently handles notifications for unregistration of MBeans, either referenced in a relation role or being a relation itself.

Specified by:: handleNotification in interface NotificationListener

Parameters:: theNtf - The notification.; theHandback - An opaque object which helps the listener to associate information regarding the MBean emitter (can be null).

getNotificationInfo

public MBeanNotificationInfo[] getNotificationInfo()

Returns a NotificationInfo object containing the name of the Java class of the notification and the notification types sent.

Specified by:: getNotificationInfo in interface NotificationBroadcaster
Overrides:: getNotificationInfo in class NotificationBroadcasterSupport

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Ent. Ed. v1.4

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Constructor Summary
`RelationService(boolean theImmediatePurgeFlg)` Constructor.

Method Summary
`void`	`addRelation(ObjectName theRelObjectName)` Adds an MBean created by the user (and registered by him in the MBean Server) as a relation in the Relation Service.
`void`	`addRelationType(RelationType theRelTypeObj)` Adds given object as a relation type.
`Integer`	`checkRoleReading(String theRoleName, String theRelTypeName)` Checks if given Role can be read in a relation of the given type.
`Integer`	`checkRoleWriting(Role theRole, String theRelTypeName, Boolean theInitFlg)` Checks if given Role can be set in a relation of given type.
`void`	`createRelation(String theRelId, String theRelTypeName, RoleList theRoleList)` Creates a simple relation (represented by a RelationSupport object) of given relation type, and adds it in the Relation Service.
`void`	`createRelationType(String theRelTypeName, RoleInfo[] theRoleInfoArray)` Creates a relation type (a RelationTypeSupport object) with given role infos (provided by the RoleInfo objects), and adds it in the Relation Service.
`Map`	`findAssociatedMBeans(ObjectName theMBeanName, String theRelTypeName, String theRoleName)` Retrieves the MBeans associated to given one in a relation.
`Map`	`findReferencingRelations(ObjectName theMBeanName, String theRelTypeName, String theRoleName)` Retrieves the relations where a given MBean is referenced.
`List`	`findRelationsOfType(String theRelTypeName)` Returns the relation ids for relations of the given type.
`List`	`getAllRelationIds()` Returns all the relation ids for all the relations handled by the Relation Service.
`List`	`getAllRelationTypeNames()` Retrieves names of all known relation types.
`RoleResult`	`getAllRoles(String theRelId)` Returns all roles present in the relation.
`MBeanNotificationInfo[]`	`getNotificationInfo()` Returns a NotificationInfo object containing the name of the Java class of the notification and the notification types sent.
`boolean`	`getPurgeFlag()` Returns the flag to indicate if when a notification is received for the unregistration of an MBean referenced in a relation, if an immediate "purge" of the relations (look for the relations no longer valid) has to be performed , or if that will be performed only when the purgeRelations method will be explicitly called.
`Map`	`getReferencedMBeans(String theRelId)` Retrieves MBeans referenced in the various roles of the relation.
`String`	`getRelationTypeName(String theRelId)` Returns name of associated relation type for given relation.
`List`	`getRole(String theRelId, String theRoleName)` Retrieves role value for given role name in given relation.
`Integer`	`getRoleCardinality(String theRelId, String theRoleName)` Retrieves the number of MBeans currently referenced in the given role.
`RoleInfo`	`getRoleInfo(String theRelTypeName, String theRoleInfoName)` Retrieves role info for given role name of a given relation type.
`List`	`getRoleInfos(String theRelTypeName)` Retrieves list of role infos (RoleInfo objects) of a given relation type.
`RoleResult`	`getRoles(String theRelId, String[] theRoleNameArray)` Retrieves values of roles with given names in given relation.
`void`	`handleNotification(Notification theNtf, Object theHandback)` Invoked when a JMX notification occurs.
`Boolean`	`hasRelation(String theRelId)` Checks if there is a relation identified in Relation Service with given relation id.
`void`	`isActive()` Checks if the Relation Service is active.
`String`	`isRelation(ObjectName theObjName)` Returns the relation id associated to the given ObjectName if the MBean has been added as a relation in the Relation Service.
`ObjectName`	`isRelationMBean(String theRelId)` If the relation is represented by an MBean (created by the user and added as a relation in the Relation Service), returns the ObjectName of the MBean.
`void`	`postDeregister()` Allows the MBean to perform any operations needed after having been unregistered in the MBean server.
`void`	`postRegister(Boolean registrationDone)` Allows the MBean to perform any operations needed after having been registered in the MBean server or after the registration has failed.
`void`	`preDeregister()` Allows the MBean to perform any operations it needs before being unregistered by the MBean server.
`ObjectName`	`preRegister(MBeanServer server, ObjectName name)` Allows the MBean to perform any operations it needs before being registered in the MBean server.
`void`	`purgeRelations()` Purges the relations.
`void`	`removeRelation(String theRelId)` Removes given relation from the Relation Service.
`void`	`removeRelationType(String theRelTypeName)` Removes given relation type from Relation Service.
`void`	`sendRelationCreationNotification(String theRelId)` Sends a notification (RelationNotification) for a relation creation.
`void`	`sendRelationRemovalNotification(String theRelId, List theUnregMBeanList)` Sends a notification (RelationNotification) for a relation removal.
`void`	`sendRoleUpdateNotification(String theRelId, Role theNewRole, List theOldRoleValue)` Sends a notification (RelationNotification) for a role update in the given relation.
`void`	`setPurgeFlag(boolean thePurgeFlg)` Sets the flag to indicate if when a notification is received for the unregistration of an MBean referenced in a relation, if an immediate "purge" of the relations (look for the relations no longer valid) has to be performed , or if that will be performed only when the purgeRelations method will be explicitly called.
`void`	`setRole(String theRelId, Role theRole)` Sets the given role in given relation.
`RoleResult`	`setRoles(String theRelId, RoleList theRoleList)` Sets the given roles in given relation.
`void`	`updateRoleMap(String theRelId, Role theNewRole, List theOldRoleValue)` Handles update of the Relation Service role map for the update of given role in given relation.

RelationService (Java 2 Platform Ent. Ed. v1.4) - Java Platform, Enterprise Edition v1.4 API Specifications

javax.management.relation Class RelationService

RelationService

isActive

preRegister

postRegister

preDeregister

postDeregister

getPurgeFlag

setPurgeFlag

createRelationType

addRelationType

getAllRelationTypeNames

getRoleInfos

getRoleInfo

removeRelationType

createRelation

addRelation

isRelationMBean

isRelation

hasRelation

getAllRelationIds

checkRoleReading

checkRoleWriting

sendRelationCreationNotification

sendRoleUpdateNotification

sendRelationRemovalNotification

updateRoleMap

removeRelation

purgeRelations

findReferencingRelations

findAssociatedMBeans

findRelationsOfType

getRole

getRoles

getAllRoles

getRoleCardinality

setRole

setRoles

getReferencedMBeans

getRelationTypeName

handleNotification

getNotificationInfo

javax.management.relation
Class RelationService