public abstract class BrooklynDslDeferredSupplier<T>
extends java.lang.Object
implements DeferredSupplier<T>, TaskFactory<Task<T>>, java.io.Serializable

provide an object suitable to resolve chained invocations in a parsed YAML / Deployment Plan DSL, which also implements DeferredSupplier so that they can be resolved when needed (e.g. when entity-lookup and execution contexts are available).

implementations of this abstract class are expected to be immutable, as instances must support usage in multiple Assembly instances created from a single AssemblyTemplate

subclasses which return a deferred value are typically only resolvable in the context of a Task on an Entity; these should be only used as the value of a ConfigKey set in the YAML, and should not accessed until after the components / entities are created and are being started. (TODO the precise semantics of this are under development.)