org.apache.brooklyn.core.relations

Class AbstractBasicRelationSupport<SourceType extends BrooklynObject>

java.lang.Object

org.apache.brooklyn.core.relations.AbstractBasicRelationSupport<SourceType>

All Implemented Interfaces:

BrooklynObject.RelationSupport<SourceType>, BrooklynObjectInternal.RelationSupportInternal<SourceType>

Direct Known Subclasses:

ByObjectBasicRelationSupport

public abstract class AbstractBasicRelationSupport<SourceType extends BrooklynObject>
extends java.lang.Object
implements BrooklynObjectInternal.RelationSupportInternal<SourceType>

This abstract impl delegates to EntityRelations for all changes, routing through a local backing store. This allows us to make the changes in both directions simultaneously when a relationship is bi-directional, and should facilitate changing a backing datastore or remote instances when that is supported.

Currently it can be implemented without it, simplifying things a bit (avoiding the double dispatch) apart from the add(RelationshipType, BrooklynObject) method triggering the reverse addition if it isn't already present. TBD which is better (and the internal call to get the backing store is marked as Beta).

Constructor Summary

Constructors

Constructor and Description
AbstractBasicRelationSupport(SourceType source)

Method Summary

Modifier and Type	Method and Description
<U extends BrooklynObject> void	add(RelationshipType<? super SourceType,? super U> relationship, U target) Adds a relationship of the given type from this object pointing at the given target, and ensures that the inverse relationship (if there is one) is present at the target pointing back at this object.
<U extends BrooklynObject> java.util.Set<U>	getRelations(RelationshipType<? super SourceType,U> relationship)
java.util.Set<RelationshipType<? super SourceType,? extends BrooklynObject>>	getRelationshipTypes()
<U extends BrooklynObject> void	remove(RelationshipType<? super SourceType,? super U> relationship, U target) Removes any and all relationships of the given type from this object pointing at the given target, and ensures that the inverse relationships (if there are one) are also removed.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.brooklyn.core.objs.BrooklynObjectInternal.RelationSupportInternal

getLocalBackingStore

Constructor Detail

AbstractBasicRelationSupport

public AbstractBasicRelationSupport(SourceType source)

Method Detail

getRelationshipTypes

public java.util.Set<RelationshipType<? super SourceType,? extends BrooklynObject>> getRelationshipTypes()

Specified by:

getRelationshipTypes in interface BrooklynObject.RelationSupport<SourceType extends BrooklynObject>

Returns:

the RelationshipTypes originating from this object

getRelations

public <U extends BrooklynObject> java.util.Set<U> getRelations(RelationshipType<? super SourceType,U> relationship)

Specified by:

getRelations in interface BrooklynObject.RelationSupport<SourceType extends BrooklynObject>

Returns:

the BrooklynObjects which are targets of the given RelationshipType

add

public <U extends BrooklynObject> void add(RelationshipType<? super SourceType,? super U> relationship,
                                           U target)

Description copied from interface: BrooklynObject.RelationSupport

Adds a relationship of the given type from this object pointing at the given target, and ensures that the inverse relationship (if there is one) is present at the target pointing back at this object.

Specified by:

add in interface BrooklynObject.RelationSupport<SourceType extends BrooklynObject>

remove

public <U extends BrooklynObject> void remove(RelationshipType<? super SourceType,? super U> relationship,
                                              U target)

Description copied from interface: BrooklynObject.RelationSupport

Removes any and all relationships of the given type from this object pointing at the given target, and ensures that the inverse relationships (if there are one) are also removed.

Specified by:

remove in interface BrooklynObject.RelationSupport<SourceType extends BrooklynObject>