Asynchronous Programming.

Contents at a Glance.

• About
• Documentation.
• Promise and Future.
• Pros.
• Cons.
• Help

About.

Documentation.

• Asynchronous programming allows you to multiplex multiple networked connections on a single thread.
• The event loop and the reactor pattern simplify asynchronous event processing.

Promise and Future.

A promise is used to write an asynchronous result, whereas a future is used to view an asynchronous result.

Las bases mas solidas sobre las que se sustenta la programacion asincrona son:

• Execucion "no ordenada".
• Programacion sin bloqueos.
• Programacion dirigida por eventos.

Asynchronous programming approaches:

• Threading
• Callbacks
• Promises/future
• Events
• Coroutines

Protocols of Asynchronous Communication

• MQTT — Message Queue Telemetry Transport (MQTT) is an ISO standard pub-sub based lightweight messaging protocol used widely in the Internet Of Things.
• AMQP — Advanced Message Queuing Protocol (AMQP) is an open standard application layer protocol for message-oriented middleware.
• STOMP — Simple Text Oriented Messaging Protocol, (STOMP), is a text-based protocol modeled on HTTP for interchanging data between services.

• From a technical point of view, an asynchronous programming means a group of design techniques, which decompose code into blocks of execution (events), that can be computed with derived result (we use subscribing in order to be notified about results).
• To sum up, when we talk about an asynchronous application, we mean that it is an application, that is composed from a number of events, that run in some event loop, and has handlers, that subscribe for the result of event computation. It is basically, a way to avoid blocking operations.

Pros.

Cons.

Help.