Cpl::Dm Namespace Reference

The 'Dm' namespace is the root namespace for a framework of the Data Model architecture pattern. More...

Detailed Description

The 'Dm' namespace is the root namespace for a framework of the Data Model architecture pattern.

The Data Model software architecture pattern is a data-oriented pattern where modules interact with each other via data instances (a.k.a. model points) with no direct dependencies between modules.

The data model consists of all the model point instances in your design, and it is the canonical authority for the data, which determines the application behavior. Model points have the following features:

• The value stored in a model point can be of any type or any data structure. A model point’s value should be strictly data and not an object. That is, model points do not contain business rules or enforce policies (except for things like value range checking).
• Model point instances are type safe. That is, all read and write operations are specific to the model point’s value type.
• Model points have atomic operations for accessing their value or state. This means that accessing model point values is a thread-safe operation.
• Model points have a valid or invalid state independent of their value.
• Model points provide a subscription mechanism for clients to receive change notifications when a model point’s value changes or if the
  model point’s validity changes.

Namespaces
namespace	Mp
	The Mp namespace provides concrete Model Points for basic C types and other generic/utility Model Points.
namespace	Persistent
	The 'Persistent' namespace provides a persistent storage mechanism for Model Points.
namespace	TShell
	The 'TShell' namespace contains the implementation of TShell commands that access Model Points at runtime.

Classes
class	EventLoop
	This class extends the Cpl::System::EventLoop class to support the asynchronous change notification generated from Model Points. More...
class	MailboxServer
	This class extends the Cpl::Dm::EventLoop and Cpl::Itc:Mailbox classes to support the asynchronous change notification generated from Model Points with ITC messaging. More...
class	ModelDatabase
	This concrete class implements a simple Model Database. More...
class	ModelDatabaseApi
	This class defines the basic operations that can be performed on a Model Base. More...
class	ModelPoint
	This mostly abstract class defines the interface for a Model Point. More...
class	ModelPointCommon_
	This concrete class provide common infrastructure for a Model Point. More...
class	NotificationApi_
	This class has PACKAGE Scope, i.e. More...
class	PeriodicScheduler
	This class extends the Cpl::Dm::MailboxServer class to add periodic scheduling to an event based 'thread'. More...
class	Subscriber
	This template class defines a type safe Subscriber. More...
class	SubscriberApi
	This abstract class defines the Subscriber interface - for change notifications - to a Model Points data/state. More...
class	SubscriberBase
	This mostly concrete class defines the Subscriber interface - for change notifications - to a Model Points data/state. More...
class	SubscriberComposer
	This template class is a composer pattern/class that manages the callback function for a Model Point's Subscribers/Observers change notification. More...