javax.management.relation

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1. Creating and Registering a Relation Service

import javax.management.relation.RelationService;
import javax.management.relation.RelationSupport;
import javax.management.ObjectName;

ObjectName relationServiceName = new ObjectName("example:type=RelationService");
RelationService relationService = new RelationSupport();
server.registerMBean(relationService, relationServiceName);

2. Creating a Relation

import javax.management.relation.Relation;
import javax.management.relation.RelationSupport;

Relation relation = new RelationSupport("example", "relationType");
relation.set("key1", obj1);
relation.set("key2", obj2);

3. Registering a Relation

import javax.management.relation.Relation;
import javax.management.ObjectName;

relationService.registerRelation("example:name=testRelation", relation);

4. Getting a Relation

import javax.management.relation.RelationService;
import javax.management.relation.Relation;
import javax.management.ObjectName;

Relation relation = relationService.getRelation("example:name=testRelation");

5. Removing a Relation

import javax.management.relation.RelationService;
import javax.management.ObjectName;

relationService.unregisterRelation("example:name=testRelation");

6. Querying Relations

import javax.management.relation.RelationService;
import javax.management.relation.RelationQueryExp;
import javax.management.relation.Role;
import javax.management.relation.RelationType;
import javax.management.ObjectName;

ObjectName relationServiceName = new ObjectName("example:type=RelationService");
RelationService relationService = (RelationService) MBeanServer.getObjectInstance(relationServiceName);

Role role = new Role("role1");
RelationType type = new RelationType("relationType");
RelationQueryExp query = new RelationQueryExp("example:name=testRelation", role, type);
Set<ObjectName> relationNames = relationService.queryRelations(query);

7. Creating a Relation Notification Emitter

import javax.management.relation.RelationNotificationEmitter;
import javax.management.relation.RelationNotificationListener;

RelationNotificationEmitter emitter = new RelationNotificationEmitter(ObjectName.getInstance("example:service=ChatService"));
emitter.addRelationNotificationListener(listener);

8. Handling Relation Notifications

import javax.management.relation.RelationNotification;
import javax.management.notification.NotificationListener;

public class RelationNotificationListener implements NotificationListener {

  @Override
  public void handleNotification(Notification notification, Object handback) {
    if (notification instanceof RelationNotification) {
      // Handle relation notification
    }
  }
}

9. Creating a Relation Type

import javax.management.relation.RelationType;
import javax.management.relation.RoleInfo;
import javax.management.relation.RoleInfo.Cardinality;

RoleInfo role1 = new RoleInfo("role1", Cardinality.ONE);
RoleInfo role2 = new RoleInfo("role2", Cardinality.MANY);
RelationType relationType = new RelationType("relationType", "relationDescription", role1, role2);

10. Registering a Relation Type

import javax.management.relation.RelationType;
import javax.management.ObjectName;

ObjectName relationServiceName = new ObjectName("example:type=RelationService");
RelationService relationService = (RelationService) MBeanServer.getObjectInstance(relationServiceName);
relationService.registerRelationType("example:relationType", relationType);

11. Getting a Relation Type

import javax.management.relation.RelationService;
import javax.management.ObjectName;

ObjectName relationServiceName = new ObjectName("example:type=RelationService");
RelationService relationService = (RelationService) MBeanServer.getObjectInstance(relationServiceName);
RelationType relationType = relationService.getRelationType("example:relationType");

12. Removing a Relation Type

import javax.management.relation.RelationService;
import javax.management.ObjectName;

ObjectName relationServiceName = new ObjectName("example:type=RelationService");
RelationService relationService = (RelationService) MBeanServer.getObjectInstance(relationServiceName);
relationService.unregisterRelationType("example:relationType");

13. Creating a Relation Type Registry

import javax.management.relation.RelationTypeRegistry;
import javax.management.relation.RelationTypeSupport;
import javax.management.relation.RoleInfo;
import javax.management.relation.RoleInfo.Cardinality;

RelationTypeRegistry registry = new RelationTypeRegistry();
RoleInfo role1 = new RoleInfo("role1", Cardinality.ONE);
RoleInfo role2 = new RoleInfo("role2", Cardinality.MANY);
RelationTypeSupport relationType = new RelationTypeSupport("relationType", "relationDescription", role1, role2);
registry.registerRelationType(relationType);

14. Getting a Relation Type from a Registry

import javax.management.relation.RelationTypeRegistry;

RelationTypeRegistry registry = new RelationTypeRegistry();
RelationType relationType = registry.getRelationType("relationType");

15. Removing a Relation Type from a Registry

import javax.management.relation.RelationTypeRegistry;

RelationTypeRegistry registry = new RelationTypeRegistry();
registry.unregisterRelationType("relationType");

16. Creating a Relation Query Expression

import javax.management.relation.RelationQueryExp;
import javax.management.ObjectName;

ObjectName relationServiceName = new ObjectName("example:type=RelationService");
RelationQueryExp query = new RelationQueryExp("example:name=testRelation", relationServiceName);

17. Creating a Role

import javax.management.relation.Role;

Role role = new Role("role1");

18. Getting a Role Name

import javax.management.relation.Role;

Role role = new Role("role1");
String roleName = role.getRoleName();

**19. Getting a Role Cardina