javax.management.relation
Interface RelationServiceMBean

All Known Implementing Classes:

RelationService

public interface RelationServiceMBean

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

Version:

1.5

Author:

Cosimo Vampo

Method Summary

void	addRelation(ObjectName theRelObjectName) Adds a MBean created by te 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.
java.lang.Integer	checkRoleReading(java.lang.String theRoleName, java.lang.String theRelTypeName) Checks if given Role can be read in a relation of the given type.
java.lang.Integer	checkRoleWriting(Role theRole, java.lang.String theRelTypeName, java.lang.Boolean theInitFlg) Checks if given Role can be set in a relation of given type.
void	createRelation(java.lang.String theRelId, java.lang.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(java.lang.String theRelTypeName, RoleInfo[] theRoleInfoArray) Creates a relation type (RelationTypeSupport object) with given role infos (provided by the RoleInfo objects), and adds it in the Relation Service.
java.util.Map	findAssociatedMBeans(ObjectName theMBeanName, java.lang.String theRelTypeName, java.lang.String theRoleName) Retrieves the MBeans associated to given one in a relation.
java.util.Map	findReferencingRelations(ObjectName theMBeanName, java.lang.String theRelTypeName, java.lang.String theRoleName) Retrieves the relations where a given MBean is referenced.
java.util.List	findRelationsOfType(java.lang.String theRelTypeName) Returns the relation ids for relations of the given type.
java.util.List	getAllRelationIds() Returns all the relation ids for all the relations handled by the Relation Service
java.util.List	getAllRelationTypeNames() Retrieves names of all known relation types
RoleResult	getAllRoles(java.lang.String theRelId) Returns all roles present in the relation
boolean	getPurgeFlag() Returns the flag to indicate if when a notification is received for the unregistration of a MBean referenced in a relation, if an immediate "purge" of the relations (look for the relations no longer valid) has to be performed , or if that will be performed only when the purgeRelations method will be explicitly called.
java.util.Map	getReferencedMBeans(java.lang.String theRelId) Retrieves MBeans referenced in the various roles of the relation.
java.lang.String	getRelationTypeName(java.lang.String theRelId) Returns name of associated relation type for given relation.
java.util.List	getRole(java.lang.String theRelId, java.lang.String theRoleName) Retrieves role value for given role name in given relation.
java.lang.Integer	getRoleCardinality(java.lang.String theRelId, java.lang.String theRoleName) Retrieves the number of MBeans currently referenced in the given role
RoleInfo	getRoleInfo(java.lang.String theRelTypeName, java.lang.String theRoleInfoName) Retrieves role info for given role of a given relation type
java.util.List	getRoleInfos(java.lang.String theRelTypeName) Retrieves list of role infos (RoleInfo objects) of a given relation type
RoleResult	getRoles(java.lang.String theRelId, java.lang.String[] theRoleNameArray) Retrieves values of roles with given names in given relation.
java.lang.Boolean	hasRelation(java.lang.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.
java.lang.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(java.lang.String theRelId) If the relation is represented by a MBean (created by the user and added as a relation in the Relation Service), returns the ObjectName of the MBean.
void	purgeRelations() Purges the relations.
void	removeRelation(java.lang.String theRelId) Removes given relation from the Relation Service.
void	removeRelationType(java.lang.String theRelTypeName) Removes given relation type from Relation Service.
void	sendRelationCreationNotification(java.lang.String theRelId) Sends a notification (RelationNotification) for a relation creation.
void	sendRelationRemovalNotification(java.lang.String theRelId, java.util.List theUnregMBeanList) Sends a notification (RelationNotification) for a relation removal.
void	sendRoleUpdateNotification(java.lang.String theRelId, Role theNewRole, java.util.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 a 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(java.lang.String theRelId, Role theRole) Sets the given role in given relation.
RoleResult	setRoles(java.lang.String theRelId, RoleList theRoleList) Sets the given roles in given relation.
void	updateRoleMap(java.lang.String theRelId, Role theNewRole, java.util.List theOldRoleValue) Handles update of the Relation Service role map for the update of given role in given relation.

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

Throws:

RelationServiceNotRegisteredException - if it is not registered

getPurgeFlag

public boolean getPurgeFlag()

Returns the flag to indicate if when a notification is received for the unregistration of a 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.

Parameters:

thePurgeFlg - flag

setPurgeFlag

public void setPurgeFlag(boolean thePurgeFlg)

Sets the flag to indicate if when a notification is received for the unregistration of a 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.

Parameters:

thePurgeFlg - flag

createRelationType

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

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

Parameters:

theRelTypeName - name of the relation type

theRoleInfoArray - array of role infos

Throws:

java.lang.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 java.lang.IllegalArgumentException,
                            InvalidRelationTypeException

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

Parameters:

theRelTypeObj - relation type object (implementing the RelationType interface)

Throws:

java.lang.IllegalArgumentException - if null parameter

InvalidRelationTypeException - if there is already a relation type with that name

getAllRelationTypeNames

public java.util.List getAllRelationTypeNames()

Retrieves names of all known relation types

Returns:

ArrayList of relation type names (Strings)

getRoleInfos

public java.util.List getRoleInfos(java.lang.String theRelTypeName)
                            throws java.lang.IllegalArgumentException,
                                   RelationTypeNotFoundException

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

Parameters:

theRelTypeName - name of relation type

Returns:

ArrayList of RoleInfo.

Throws:

java.lang.IllegalArgumentException - if null parameter

RelationTypeNotFoundException - if there is no relation type with that name.

getRoleInfo

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

Retrieves role info for given role of a given relation type

Parameters:

theRelTypeName - name of relation type

theRoleInfoName - name of role

Returns:

RoleInfo object.

Throws:

java.lang.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(java.lang.String theRelTypeName)
                        throws RelationServiceNotRegisteredException,
                               java.lang.IllegalArgumentException,
                               RelationTypeNotFoundException

Removes given relation type from Relation Service.

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

Parameters:

theRelTypeName - name of the relation type to be removed

Throws:

RelationServiceNotRegisteredException - if the Relation Service is

java.lang.IllegalArgumentException - if null parameter

RelationTypeNotFoundException - If there is no relation type with that name

createRelation

public void createRelation(java.lang.String theRelId,
                           java.lang.String theRelTypeName,
                           RoleList theRoleList)
                    throws RelationServiceNotRegisteredException,
                           java.lang.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 initialised using that mean are set to an empty ArrayList of ObjectNames.

A RelationNotification, with type RELATION_BASIC_CREATION, is sent.

Parameters:

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

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

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

Throws:

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

java.lang.IllegalArgumentException - if null paramater

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

- a MBean provided for that role does not exist

addRelation

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

Adds a MBean created by te 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.

Parameters:

theRelObjectName - ObjectName of the relation MBean to be added.

Throws:

java.lang.IllegalArgumentException - if null parameter

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

java.lang.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

- a 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(java.lang.String theRelId)
                           throws java.lang.IllegalArgumentException,
                                  RelationNotFoundException

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

Parameters:

theRelId - - relation id identifying the relation

Returns:

ObjectName of the corresponding relation MBean, or null if the relation is not a MBean.

Throws:

java.lang.IllegalArgumentException - if null parameter

RelationNotFoundException - there is no relation associated to that id

isRelation

public java.lang.String isRelation(ObjectName theObjName)
                            throws java.lang.IllegalArgumentException

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

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:

java.lang.IllegalArgumentException - if null parameter

hasRelation

public java.lang.Boolean hasRelation(java.lang.String theRelId)
                              throws java.lang.IllegalArgumentException

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

Parameters:

theRelId - relation id identifying the relation

Returns:

boolean: true if there is a relation, false else

Throws:

java.lang.IllegalArgumentException - if null parameter

getAllRelationIds

public java.util.List getAllRelationIds()

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

Returns:

ArrayList of String

checkRoleReading

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

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

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:

IllegalArgument - if null parameter

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

checkRoleWriting

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

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

Parameters:

theRole - role to be checked

theRelTypeName - name of relation type

theInitFlg - flag to specify that the checking is done for the initialisation 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:

java.lang.IllegalArgumentException - if null parameter

RelationTypeNotFoundException - if unknown relation type

sendRelationCreationNotification

public void sendRelationCreationNotification(java.lang.String theRelId)
                                      throws java.lang.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.

Parameters:

theRelId - relation identifier of the updated relation

Throws:

java.lang.IllegalArgumentException - if null parameter

RelationNotFoundException - if there is no relation for given relation id

sendRoleUpdateNotification

public void sendRoleUpdateNotification(java.lang.String theRelId,
                                       Role theNewRole,
                                       java.util.List theOldRoleValue)
                                throws java.lang.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.

Throws:

java.lang.IllegalArgumentException - if null parameter

RelationNotFoundException - - if there is no relation for given relation id

sendRelationRemovalNotification

public void sendRelationRemovalNotification(java.lang.String theRelId,
                                            java.util.List theUnregMBeanList)
                                     throws java.lang.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.

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:

java.lang.IllegalArgumentException - if null parameter

RelationNotFoundException - if there is no relation for given relation id

updateRoleMap

public void updateRoleMap(java.lang.String theRelId,
                          Role theNewRole,
                          java.util.List theOldRoleValue)
                   throws java.lang.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.

Parameters:

theRelId - relation identifier of the updated relation

theNewRole - new role (name and new value)

theOldRoleValue - old role value (ArrayList of ObjectName objects)

Throws:

java.lang.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(java.lang.String theRelId)
                    throws RelationServiceNotRegisteredException,
                           java.lang.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 a MBean.

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

Parameters:

theRelId - relation id of the relation to be removed

Throws:

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

java.lang.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 a 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 a 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.

Throws:

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

findReferencingRelations

public java.util.Map findReferencingRelations(ObjectName theMBeanName,
                                              java.lang.String theRelTypeName,
                                              java.lang.String theRoleName)
                                       throws java.lang.IllegalArgumentException

Retrieves the relations where a given MBean is referenced.

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

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 a MBean can be referenced in several roles in the same relation).

Throws:

java.lang.IllegalArgumentException - if null parameter

findAssociatedMBeans

public java.util.Map findAssociatedMBeans(ObjectName theMBeanName,
                                          java.lang.String theRelTypeName,
                                          java.lang.String theRoleName)
                                   throws java.lang.IllegalArgumentException

Retrieves the MBeans associated to given one in a relation.

This corresponds to CIM Associators and AssociatorNames operations.

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:

java.lang.IllegalArgumentException - if null parameter

findRelationsOfType

public java.util.List findRelationsOfType(java.lang.String theRelTypeName)
                                   throws java.lang.IllegalArgumentException,
                                          RelationTypeNotFoundException

Returns the relation ids for relations of the given type.

Parameters:

theRelTypeName - relation type name

Returns:

an ArrayList of relation ids.

Throws:

java.lang.IllegalArgumentException - if null parameter

RelationTypeNotFoundException - if there is no relation type with that name.

getRole

public java.util.List getRole(java.lang.String theRelId,
                              java.lang.String theRoleName)
                       throws RelationServiceNotRegisteredException,
                              java.lang.IllegalArgumentException,
                              RelationNotFoundException,
                              RoleNotFoundException

Retrieves role value for given role name in given relation.

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

java.lang.IllegalArgumentException - if null parameter

RelationNotFoundException - if no relation with given id

RoleNotFoundException - if:

- there is no role with given name

or

- the role is not readable.

getRoles

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

Retrieves values of roles with given names in given relation.

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

java.lang.IllegalArgumentException - if null parameter

RelationNotFoundException - if no relation with given id

getAllRoles

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

Returns all roles present in the relation

Parameters:

theRelId - relation id

Returns:

a RoleResult object, including a RoleList (for roles succcessfully retrieved) and a RoleUnresolvedList (for roles not readable).

Throws:

java.lang.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 java.lang.Integer getRoleCardinality(java.lang.String theRelId,
                                            java.lang.String theRoleName)
                                     throws java.lang.IllegalArgumentException,
                                            RelationNotFoundException,
                                            RoleNotFoundException

Retrieves the number of MBeans currently referenced in the given role

Parameters:

theRelId - relation id

theRoleName - name of role

Returns:

the number of currently referenced MBeans in that role

Throws:

java.lang.IllegalArgumentException - if null parameter

RelationNotFoundException - if no relation with given id

RoleNotFoundException - if there is no role with given name

setRole

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

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.

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

java.lang.IllegalArgumentException - if null parameter

RelationNotFoundException - if no relation with given id

RoleNotFoundException - if:

- internal relation

and

- the role does not exist or is not writable

InvalidRoleValueException - if internal relation and value provided for role is not valid:

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

or

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

or

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

or

- a MBean provided for that role does not exist

RelationTypeNotFoundException - if unknown relation type

setRoles

public RoleResult setRoles(java.lang.String theRelId,
                           RoleList theRoleList)
                    throws RelationServiceNotRegisteredException,
                           java.lang.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.

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

java.lang.IllegalArgumentException - if null parameter

RelationNotFoundException - if no relation with given id

getReferencedMBeans

public java.util.Map getReferencedMBeans(java.lang.String theRelId)
                                  throws java.lang.IllegalArgumentException,
                                         RelationNotFoundException

Retrieves MBeans referenced in the various roles of the relation.

Parameters:

theRelId - relation id

Returns:

a HashMap mapping:

ObjectName -> ArrayList of String (role names)

Throws:

java.lang.IllegalArgumentException - if null parameter

RelationNotFoundException - if no relation for given relation id

getRelationTypeName

public java.lang.String getRelationTypeName(java.lang.String theRelId)
                                     throws java.lang.IllegalArgumentException,
                                            RelationNotFoundException

Returns name of associated relation type for given relation.

Parameters:

theRelId - relation id

Throws:

java.lang.IllegalArgumentException - if null parameter

RelationNotFoundException - if no relation for given relation id