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.

Since:: 1.5

Constructors

Constructor	Description
`RelationService(boolean immediatePurgeFlag)`	Constructor.

Methods

Modifier and Type	Method	Description
`void`	`addRelation(ObjectName relationObjectName)`	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 relationTypeObj)`	Adds given object as a relation type.
`Integer`	`checkRoleReading(String roleName, String relationTypeName)`	Checks if given Role can be read in a relation of the given type.
`Integer`	`checkRoleWriting(Role role, String relationTypeName, Boolean initFlag)`	Checks if given Role can be set in a relation of given type.
`void`	`createRelation(String relationId, String relationTypeName, RoleList roleList)`	Creates a simple relation (represented by a RelationSupport object) of given relation type, and adds it in the Relation Service.
`void`	`createRelationType(String relationTypeName, RoleInfo[] roleInfoArray)`	Creates a relation type (a RelationTypeSupport object) with given role infos (provided by the RoleInfo objects), and adds it in the Relation Service.
`Map<ObjectName,List<String>>`	`findAssociatedMBeans(ObjectName mbeanName, String relationTypeName, String roleName)`	Retrieves the MBeans associated to given one in a relation.
`Map<String,List<String>>`	`findReferencingRelations(ObjectName mbeanName, String relationTypeName, String roleName)`	Retrieves the relations where a given MBean is referenced.
`List<String>`	`findRelationsOfType(String relationTypeName)`	Returns the relation ids for relations of the given type.
`List<String>`	`getAllRelationIds()`	Returns all the relation ids for all the relations handled by the Relation Service.
`List<String>`	`getAllRelationTypeNames()`	Retrieves names of all known relation types.
`RoleResult`	`getAllRoles(String relationId)`	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<ObjectName,List<String>>`	`getReferencedMBeans(String relationId)`	Retrieves MBeans referenced in the various roles of the relation.
`String`	`getRelationTypeName(String relationId)`	Returns name of associated relation type for given relation.
`List<ObjectName>`	`getRole(String relationId, String roleName)`	Retrieves role value for given role name in given relation.
`Integer`	`getRoleCardinality(String relationId, String roleName)`	Retrieves the number of MBeans currently referenced in the given role.
`RoleInfo`	`getRoleInfo(String relationTypeName, String roleInfoName)`	Retrieves role info for given role name of a given relation type.
`List<RoleInfo>`	`getRoleInfos(String relationTypeName)`	Retrieves list of role infos (RoleInfo objects) of a given relation type.
`RoleResult`	`getRoles(String relationId, String[] roleNameArray)`	Retrieves values of roles with given names in given relation.
`void`	`handleNotification(Notification notif, Object handback)`	Invoked when a JMX notification occurs.
`Boolean`	`hasRelation(String relationId)`	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 objectName)`	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 relationId)`	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`	`purgeRelations()`	Purges the relations.
`void`	`removeRelation(String relationId)`	Removes given relation from the Relation Service.
`void`	`removeRelationType(String relationTypeName)`	Removes given relation type from Relation Service.
`void`	`sendRelationCreationNotification(String relationId)`	Sends a notification (RelationNotification) for a relation creation.
`void`	`sendRelationRemovalNotification(String relationId, List<ObjectName> unregMBeanList)`	Sends a notification (RelationNotification) for a relation removal.
`void`	`sendRoleUpdateNotification(String relationId, Role newRole, List<ObjectName> oldValue)`	Sends a notification (RelationNotification) for a role update in the given relation.
`void`	`setPurgeFlag(boolean purgeFlag)`	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 relationId, Role role)`	Sets the given role in given relation.
`RoleResult`	`setRoles(String relationId, RoleList roleList)`	Sets the given roles in given relation.
`void`	`updateRoleMap(String relationId, Role newRole, List<ObjectName> oldValue)`	Handles update of the Relation Service role map for the update of given role in given relation.

Methods declared in class javax.management.NotificationBroadcasterSupport

addNotificationListener, handleNotification, sendNotification

Methods declared in class java.lang.Object

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

Methods declared in interface javax.management.MBeanRegistration

postDeregister, postRegister, preDeregister, preRegister

Methods declared in interface javax.management.NotificationBroadcaster

removeNotificationListener

Methods declared in interface javax.management.NotificationEmitter

removeNotificationListener

Constructors

RelationService

public RelationService(boolean immediatePurgeFlag)

Constructor.

Parameters:: immediatePurgeFlag - 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.

Methods

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

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 purgeFlag)

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:: purgeFlag - flag
See Also:: getPurgeFlag()

createRelationType

public void createRelationType(String relationTypeName,
                               RoleInfo[] roleInfoArray)
                        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:

relationTypeName - name of the relation type

roleInfoArray - 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 relationTypeObj)
                     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:

relationTypeObj - relation type object (implementing the RelationType interface)

Throws:

IllegalArgumentException - if null parameter or if relationTypeObj.getRelationTypeName() returns null.

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<String> getAllRelationTypeNames()

Retrieves names of all known relation types.

Specified by:: getAllRelationTypeNames in interface RelationServiceMBean
Returns:: ArrayList of relation type names (Strings)

getRoleInfos

public List<RoleInfo> getRoleInfos(String relationTypeName)
                            throws IllegalArgumentException,
                                   RelationTypeNotFoundException

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

Specified by:: getRoleInfos in interface RelationServiceMBean
Parameters:: relationTypeName - 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 relationTypeName,
                            String roleInfoName)
                     throws IllegalArgumentException,
                            RelationTypeNotFoundException,
                            RoleInfoNotFoundException

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

Specified by:: getRoleInfo in interface RelationServiceMBean
Parameters:: relationTypeName - name of relation type; roleInfoName - 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 relationTypeName)
                        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:: relationTypeName - 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 relationId,
                           String relationTypeName,
                           RoleList roleList)
                    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:

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

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

roleList - 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 list 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 relationObjectName)
                 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:

relationObjectName - 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 relationId)
                           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:: relationId - 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 objectName)
                  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:: objectName - 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 relationId)
                    throws IllegalArgumentException

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

Specified by:: hasRelation in interface RelationServiceMBean
Parameters:: relationId - relation id identifying the relation
Returns:: boolean: true if there is a relation, false else
Throws:: IllegalArgumentException - if null parameter

getAllRelationIds

public List<String> 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 roleName,
                                String relationTypeName)
                         throws IllegalArgumentException,
                                RelationTypeNotFoundException

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

Specified by:

checkRoleReading in interface RelationServiceMBean

Parameters:

roleName - name of role to be checked

relationTypeName - 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 role,
                                String relationTypeName,
                                Boolean initFlag)
                         throws IllegalArgumentException,
                                RelationTypeNotFoundException

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

Specified by:

checkRoleWriting in interface RelationServiceMBean

Parameters:

role - role to be checked

relationTypeName - name of relation type

initFlag - 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 relationId)
                                      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:: relationId - 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 relationId,
                                       Role newRole,
                                       List<ObjectName> oldValue)
                                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:: relationId - relation identifier of the updated relation; newRole - new role (name and new value); oldValue - old role value (List of ObjectName objects)
Throws:: IllegalArgumentException - if null parameter; RelationNotFoundException - if there is no relation for given relation id

sendRelationRemovalNotification

public void sendRelationRemovalNotification(String relationId,
                                            List<ObjectName> unregMBeanList)
                                     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:: relationId - relation identifier of the updated relation; unregMBeanList - List 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 relationId,
                          Role newRole,
                          List<ObjectName> oldValue)
                   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:: relationId - relation identifier of the updated relation; newRole - new role (name and new value); oldValue - old role value (List 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 relationId)
                    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:: relationId - 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<String,List<String>> findReferencingRelations(ObjectName mbeanName,
                                                               String relationTypeName,
                                                               String roleName)
                                                        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:: mbeanName - ObjectName of MBean; relationTypeName - can be null; if specified, only the relations of that type will be considered in the search. Else all relation types are considered.; roleName - 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<ObjectName,List<String>> findAssociatedMBeans(ObjectName mbeanName,
                                                               String relationTypeName,
                                                               String roleName)
                                                        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:: mbeanName - ObjectName of MBean; relationTypeName - can be null; if specified, only the relations of that type will be considered in the search. Else all relation types are considered.; roleName - 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<String> findRelationsOfType(String relationTypeName)
                                 throws IllegalArgumentException,
                                        RelationTypeNotFoundException

Returns the relation ids for relations of the given type.

Specified by:: findRelationsOfType in interface RelationServiceMBean
Parameters:: relationTypeName - 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<ObjectName> getRole(String relationId,
                                String roleName)
                         throws RelationServiceNotRegisteredException,
                                IllegalArgumentException,
                                RelationNotFoundException,
                                RoleNotFoundException

Retrieves role value for given role name in given relation.

Specified by:

getRole in interface RelationServiceMBean

Parameters:

relationId - relation id

roleName - 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

or

- the role is not readable.

getRoles

public RoleResult getRoles(String relationId,
                           String[] roleNameArray)
                    throws RelationServiceNotRegisteredException,
                           IllegalArgumentException,
                           RelationNotFoundException

Retrieves values of roles with given names in given relation.

Specified by:: getRoles in interface RelationServiceMBean
Parameters:: relationId - relation id; roleNameArray - array of names of roles to be retrieved
Returns:: a RoleResult object, including a RoleList (for roles successfully 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 relationId)
                       throws IllegalArgumentException,
                              RelationNotFoundException,
                              RelationServiceNotRegisteredException

Returns all roles present in the relation.

Specified by:: getAllRoles in interface RelationServiceMBean
Parameters:: relationId - relation id
Returns:: a RoleResult object, including a RoleList (for roles successfully 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 relationId,
                                  String roleName)
                           throws IllegalArgumentException,
                                  RelationNotFoundException,
                                  RoleNotFoundException

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

Specified by:: getRoleCardinality in interface RelationServiceMBean
Parameters:: relationId - relation id; roleName - 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 relationId,
                    Role role)
             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 deregistrations.

Specified by:

setRole in interface RelationServiceMBean

Parameters:

relationId - relation id

role - 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

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

- an MBean provided for that role does not exist

setRoles

public RoleResult setRoles(String relationId,
                           RoleList roleList)
                    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 deregistrations.

Specified by:: setRoles in interface RelationServiceMBean
Parameters:: relationId - relation id; roleList - list of roles to be set
Returns:: a RoleResult object, including a RoleList (for roles successfully 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<ObjectName,List<String>> getReferencedMBeans(String relationId)
                                                       throws IllegalArgumentException,
                                                              RelationNotFoundException

Retrieves MBeans referenced in the various roles of the relation.

Specified by:: getReferencedMBeans in interface RelationServiceMBean
Parameters:: relationId - 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 relationId)
                           throws IllegalArgumentException,
                                  RelationNotFoundException

Returns name of associated relation type for given relation.

Specified by:: getRelationTypeName in interface RelationServiceMBean
Parameters:: relationId - 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 notif,
                               Object handback)

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:: notif - The notification.; handback - 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
Returns:: the array of possible notifications.

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/11/docs/api/java.management/javax/management/relation/RelationService.html