7. Scaling Your Codebase and Deploying Your Application

Making an action's logic reusable and composable with action builders

This section shows patterns to factor out the common code that is duplicated in your controllers. The resulting action builders can be used to capture transversal concerns such as authentication.

Capturing the logic of actions that use blocking APIs

We saw in Chapter 5, Reactively Handling Long-running Requests, how to specify in which execution context to execute an action communicating with a database using a blocking API based on JDBC. We did this by wrapping the action code in a Future object (a Promise object in Java) and by explicitly specifying which execution context to use to execute them. This resulted in quite bloated code:

import my.execution.context
val myAction = Action.async {
  Future {
    // the action's code actually starts only here!
  }
}

The Java equivalent was the following:

public static Promise<Result> myAction() {
  return Promise.promise(
    () -> {
      // the action's code actually starts...

Tech Concepts

Programming languages

Tech Tools

Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.

Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.

50+ new titles added per month and exclusive early access to books as they are being written.

Play Framework essentials

By : Julien Richard-Foy

Play Framework essentials

By: Julien Richard-Foy

Overview of this book

Making an action's logic reusable and composable with action builders

Capturing the logic of actions that use blocking APIs

Play Framework essentials

By : Julien Richard-Foy

Play Framework essentials

By: Julien Richard-Foy

Overview of this book

Making an action's logic reusable and composable with action builders

Capturing the logic of actions that use blocking APIs

Confirmation

Buy this book with your credits?

Submit Your Feedback

Create a Free Account To Continue Reading

Sign in to activate your 7-day free access