Responsiveness

The last but very important trait is responsiveness. In Reactive systems, Responsive means reacting to the users or customers in a timely manner. Here, we should understand this point—a user should get a response when needed, otherwise they will lose interest and go for other options. In the current Reactive World, the following two things are the same:

• Not giving response to users when needed or in a timely manner
• Not giving any response to users at all

Even though our system does give a response to the user at a later time, the user does not need it then. Our system loses the users and ultimately, we lose our business.

In simple words, Responsive = React to users.

After going through these four traits of a Reactive system, we should understand the following things:

• The main goal of a Reactive system is responsiveness
• The core method that a Reactive system should follow is Message-Driven
• The core principles of a Reactive system are Elasticity and Resilience:

The core method of a Reactive system, that is, the Message-Driven approach, will give us Elasticity and Resilience for free:

These three traits of a Reactive system (that is, Message-Driven, Elasticity, and Resilience) give us the main goal or value of that Reactive system—responsiveness.

After going through the Reactive Manifesto, we can represent it in a pictorial form, as shown here: