Play api scala example. Contains the public API for Scala developers.

Play api scala example Mar 18, 2024 · 1. Database import play. on 2. The profile. Template files must be named {name}. If you are using IntelliJ IDE Ultimate Edition, first please create a Play Framework web application using IDE. shaded. get Sep 13, 2023 · Here's an example: import play. JsPath represents a path into a JsValue structure. This library contains both the Scala and Java APIs, under play. async { (helloActor ? §Filters. The add and save methods in this class You signed in with another tab or window. In this article, we implemented a REST API in the Play Framework using Scala. In this tutorial, you learn how to: In the end, you have a web API that can manage “to-do” items stored in a database. _ import akka. You can import the currently running application in a scope using: 2 days ago · play. slick. play-json uses implicit formats as other json frameworks. Dec 13, 2024 · 本文整理汇总了Scala中play. Future import play. de = "myapp Aug 27, 2024 · Scala入门 Scala语言是一门多范式（多范式是指：面向对象、面向过程、范型和函数式四种程序设计方法）的编程语言，平滑的集成了面向对象和函数式语言的特性。Scala语言被Martin Odersky在2001年开始设计。特点 和Java一样，运行在JVM上 可以 You signed in with another tab or window. db. Note that this API depends on a running application. A new folder is created Mar 18, 2024 · This template generates a Play Scala project name [play-scala-seed]: In this example, we are going to name it “baeldung-play-framework. mvc. Technologies used. Action is basically a (play. Iteratee[A,Unit], _], writeable: Writeable[A]) extends PlainResult with Product with Serializable. util. NamedDatabase // inject "orders" database instead of "default" class ScalaInjectNamed @Inject()( @NamedDatabase("orders") db: Database, val Play Framework makes it easy to build web applications with Java & Scala. You signed out in another tab or window. You can either clone the play Note: The Play APIs for Scala and Java are separated into different packages. Built on Pekko (Play 3) and Akka (Play 2), Play provides predictable and minimal resource consumption (CPU, memory, threads) for highly-scalable applications. In this tutorial, we’re going to build a Sep 5, 2024 · Learn how to build a robust REST API using Scala and Play Framework, covering setup, security, performance, and deployment strategies. Example 1. Configuration import play. The routes file supports regular expressions for flexible mappings. Play projects contain Scala components, but because Play has a Java API, Java developers do not need to learn Scala to use Play successfully. hmrc/company-registration-eligibility Play Mailer is a powerful Scala Mailing library. Querying Multiple Databases. ControllerComponents import play. Contains the JDBC database access API. Environment class Module(environment: Environment, configuration: Configuration) extends AbstractModule { override def configure() = { // Expect configuration like: // hello. Referential demo This codebase was created to demonstrate a fully fledged fullstack application built with Scala & Play Framework including CRUD operations, authentication, routing, pagination, and more. pattern. Dec 2, 2024 · 总的来说，这个“kafka-sample”项目是一个很好的入门案例，用于那些希望通过Play API与Kafka交互进行开发的Scala开发者。 通过学习和实践该项目，开发者不仅能够掌握如何从Web层向Kafka发送消息，还能够熟悉Play框架的开发流程以及Kafka的配置和使用。 For each controller used in the routes file, the router will generate a ‘reverse controller’ in the routes package, having the same action methods, with the same signature, but returning a play. Add a model class and a database context. ExecutionContext import scala. Create a controller with CRUD Jan 28, 2016 · In this two part series we explore Play Framework, and see how it can be used for rapidly developing RESTful APIs. If you are looking Feb 3, 2022 · As our example, we’ll build a student list application. 可以在 Play for Scala: Covers Play 2 (2013) by Peter Hilton, Erik Bakker, Francisco Canedo aar android apache api application arm assets build build-system bundle client clojure cloud config cran data database eclipse example extension framework github gradle groovy ios javascript kotlin library logging maven mobile module npm osgi persistence Jan 8, 2024 · DbSchema is a super-flexible database designer, which can take you from designing the DB with your team all the way to safely deploying the schema. SlickComponents provide access to the slickApi. google. Modern web applications often need to parse and generate data in the JSON (JavaScript Object Notation) format. Example, retrieving a connection from the 'customers' datasource: Play's API seeks to address this in a DI container agnostic way. ahc, for example the usePooledMemory setting in the shaded version of AsyncHttpClient is defined like this: §The Play WS API. Reload to refresh your session. package controllers import javax. Rather than use a database, we’ll store the student list items in memory. Make sure you have verified the requirements for running Play. Jan 28, 2016 · package controllers import play. get bodyAsJson. Play provides a simple filter API for applying global filters to each request. Call instead of a play. seconds def sayHello(name: String) = Action. json package includes several features for constructing JSON from scratch, as well as for converting §The Play cache API. ” The organization name is going to be used as the package name. 1. syntax. The following example projects can be downloaded. json. Read configuration val poolSize = configuration. g8 Building a Simple RESTful API This endows Play applications with a stateless, non-blocking, event-driven architecture that provides horizontal and vertical scalability and uses resources more efficiently. Below is an example of using our HelloActor with the ask pattern: import play. 官网的解释是这样的：1. Let's see few basic on how to create a Scala List. Contains the public API for Scala developers. Flag to indicate the macros can use the type default values (e. Before deploying your API, you need to adjust several settings for the live Play JSON is a powerful Scala JSON library, originally developed by the Play team for use with Play Framework. In our example we’ll explore the Play WebService Library. There are two important parts to using the WSClient: making a request, and processing the response. _ Scala Examples The following examples show how to use play. Configuration API. This knowledge will be invaluable in your work as a Scala developer. Then we are converting that Scala String object into a JsValue using Json. The reason for providing this abstraction is so that Play, the modules it provides, and third party modules can all express their bindings in a way that is not specific to import com. Call defines an HTTP call, and provides both the HTTP method and the URI. Overview For building simple, CRUD-style REST APIs in Scala, the Play Framework is a good solution. BaseController import play. You switched accounts on another tab or window. ws. Play Framework - The High Velocity Web Framework For Java and Scala Dec 3, 2019 · This tutorial teaches the basics of building a web API with the Scala Play Framework. Play supports this via its WS library, which provides a way to make asynchronous HTTP calls. Timeout import javax. Play supports this via its JSON library. 4. _ @Singleton class Play Framework - The High Velocity Web Framework For Java and Scala Play Framework Try Play Documentation Get Involved Open Collective Discuss Play Forum Play Discord Server Twitter GitHub Stackoverflow Jul 18, 2018 · In this section, we will develop one Play/Scala/SBT example to understand “How Play Framework supports Default Parameters?” concept very well. In part one, we introduce Play, covering the main design decisions behind its architecture and potential 2 days ago · This tutorial teaches the basics of building a web API with the Scala Play Framework. concurrent. NotFound val message = "" //when Json API For example: case class User(id: Long, name: String, friends: List[User]) implicit object UserFormat extends Format[User] { def reads(json: JsValue): User The Play Framework combines productivity and performance making it easy to build scalable web applications with Java and Scala. info("Hello!") Define a Plugin class MyPlugin(app: Application) extends Plugin Create adhoc applications (for testing) Scala & Play Framework codebase containing real world examples (CRUD, auth, advanced patterns, etc) that adheres to the RealWorld spec and API. It has an uncomplicated API that doesn’t require us to write too much code. validate [User] match {case success: JsSuccess [User] => {val username = success. The source locations for template files can be configured. Sep 13, 2023 · To start building RESTful APIs with Scala, you need to install the Scala build tool (sbt). actor. ask import akka. def echo = Action { request => Ok("Got request [" + request + "]") } Play for Scala developers. In this blog, we’re going to build a REST API in Scala with Play. User def myAction = Action {implicit request => // this will fail if the request body is not a valid json value val bodyAsJson = request. case class ChunkedResult [A] (header: ResponseHeader, chunks: Function1[play. default values for the case class parameters) when applicable. _ // if you need DSL DefaultFormat contains defaul formats to read/write all basic types. A list is a collection of same type elements which contains immutable data. http. Twirl template files are expected to be placed under src/main/twirl or src/test/twirl, similar to scala or java sources. * * There are two approaches demonstrated in this controller: * - using JsObjects directly * - using case classes that can be turned into JSON Apr 18, 2024 · In Scala, list is defined under scala. Actions, Controllers and §The Play JSON library Basics §Overview The recommended way of dealing with JSON is using Play’s typeclass based JSON library, located at play. libs. The benefit of this approach is that both the Java and the Scala side of Play can share the same underlying library (Jackson), while Scala Play Slick currently supports Slick 3. Note: An important point about the cache is that it behaves just like a cache should: the data you just stored may just go missing. info("get all users called") In the above example, we show the most common case, which is the logger creation with the current class as an argument. Access the current Play application import play. The way it does all of that is by using a design model, a database Feb 3, 2024 · The Anorm. There are two important parts to using the WS API: making a request, and processing the response. §Calling REST APIs with Play WS. 3. It provides a simple configurable mailer. The application will provide several endpoints, and we’ll build it in small, incremental steps. scala source code is to click on a method like executeInsert or executeUpdate in your Scala IDE. Feb 3, 2022 · In earlier blogs I discussed about play framework now lets we move to further topics on play. mvc and the Java MVC API is under play. 2 JsPath Utilities. Silhouette controller. We will build the API from scratch over the course of this article, but if you'd like to see the final result, you can find the sample code on GitHub. The Configuration API; HTTP programming. Play is based on a lightweight, stateless, web-friendly architecture. The play-samples GitHub repository offers Play examples for Java and Scala. A play. _. Second, the CacheApi is a thin blocking wrapper around the asynchronous implementation. Logger class. api. This means that the settings in ahc-default. _ import scala. size") Contains the JDBC database access API. You’ll learn about handling HTTP requests, sending HTTP Aug 16, 2018 · In this post, we are going to discuss about one of the important module of Play! Framework: Play JSON Module with some simple and useful examples. §JSON basics. Play API REST Template by Adrianhurt: shows how to implement a complete Json RESTful API with some characteristics such as Sep 5, 2023 · Play Framework “makes it easy to build web applications with Java & Scala”, as it is stated on their site, and it’s true. hmrc/api-example-scala-client. Let’s write an example: private val logger = Logger(getClass) logger. _, Json. In this tutorial, we’re going to build a REST API in Scala with Play. 5k次。因为最近在编写scala程序，就发现了使用play框架来方便的解析json数据。一. In the example below, we Dec 27, 2024 · Source code and more for the the community driven high velocity web framework for Java and Scala - Play Framework Mar 18, 2024 · Learn how to access a database with Play. _ import models. Open your terminal and type: brew install sbt Next, create a new directory for your project and navigate into it: mkdir ScalaRestAPI cd ScalaRestAPI Then, initialize a new sbt project: sbt new scala/scala-seed. Scala package Play JSON is a powerful Scala JSON library, originally developed by the Play team for use with Play Framework. {ext} where ext can Feb 3, 2024 · Notice that the controller code includes a case class to work with the form, and the definition of a Form and a form mapping, in addition to the necessary controller methods. getClass. Logger import play. e. §Accessing the configuration Typically, you’ll obtain a Configuration object through Jan 8, 2024 · In this tutorial, we’ll fire multiple asynchronous requests to a service from a Play Framework application. Nov 19, 2018 · TL;DR: In this article we're using to use Scala and the Play Framework to build an API that serves blog posts and comments, and then secure the API using access tokens. 3 with Play 2. properties and the AsyncHttpClient system properties are prepended with play. ahc, for example the usePooledMemory setting in the shaded version of AsyncHttpClient is defined like this: Justin Rodenbostel of SPR Consulting also has two blog posts on building REST APIs in Play: Building a Simple REST API with Scala & Play! (PART 1) Building a Simple REST API with Scala & Play! (PART 2) §Slick. zip; The Quickstart sample is described in Introduction to Actors and walks you through example code that introduces how to define actor systems, actors, and You can find the entire Silhouette module with scala docs in the SilhouetteModule. For example, the Scala MVC API is under play. Setting Up for Production. Inject import play. Scala akka-quickstart-scala. 4. . Developer friendly. size") Use the logger Logger. current Read configuration val poolSize = configuration. ask implicit val timeout: Timeout = 5. 13. duration. scala source code is well documented; Note that the easiest way to read the latest Anorm. _ import actors. Play uses the Typesafe config library, but Play also provides a nice Scala wrapper called Configuration with more advanced Scala features. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. zip; Java akka-quickstart-java. functional. AbstractModule import com. "), this. _ object Application extends Controller { def getName = Action { Ok("Jim") } } And there we have it — a simple REST API that returns the String “Jim” when the /name endpoint is requested. Execution. _ type Opts = MacroOptions with DefaultValues sealed trait JsValueWrapper extends AnyRef Justin Rodenbostel of SPR Consulting also has two blog posts on building REST APIs in Play: Building a Simple REST API with Scala & Play! (PART 1) Building a Simple REST API with Scala & Play! (PART 2) §Slick. Let's explore how to set up your application for production and the various ways to deploy it. iteratee. Nov 15, 2024 · The following examples show how to use play. Play has many features, so rather than pack them all into one project, we’ve organized many examples that each showcase a Play feature or demonstrate a common use case. body. 可以解析json字符串，可以创建json字符串。基于java的JSON库和jackson。3. typesafe. {Action, Controller} /* * Example using ReactiveMongo + Play JSON library. Inject import scala. _ import gives us the database I/O Action implementation for the relevant driver and database, The Slick documentation contains a lot of examples of queries and other extra methods we might find useful. Action. _ case class User(name: String, age: Int, email In this tutorial, we've learned how to read, write, and validate JSON in Scala using the Play JSON library. SBT dependency: libraryDependencies += ""com. Play. The Play WebService (WS) Library High-level API to access Play global features. x, Scala and RethinkDB by 2 days ago · GET /api/todos Get all to-do items None An array of to-do items GET /api/todos/{id} Get an item by ID None To-do item POST /api/todos/add Add a new item To-do item To-do item PUT /api/todos/{id} Update an existing item Mar 18, 2024 · In a Play application, we create and access logger instances through the play. getInt("engine. 12. inject. Create an empty List Example : // Scala program to cre Mar 9, 2015 · package controllers import play. We are going to use IntelliJ IDE and SBT build tool to develop this application. 12 and Scala 2. Play framework, Slick and MySQL Tutorial by Pedro Rijo. First, we initialized the First, the CacheAsyncApi provides extended API to work with Redis and enables non-blocking connection providing results through scala. This is not required but it will simplify work with Silhouette Nov 9, 2015 · Choose from these featured templates or enter a template name: 1) minimal-akka-java-seed 2) minimal-akka-scala-seed 3) minimal-java 4) minimal-scala 5) play-java 6) play-scala (hit tab to see a list of all templates) For now we’ll choose 6) play-scala for scala or 5) play-java for java, as you wish. There are multiple ways to create a List in Scala. EnglishHello" // hello. A chunked result, which defines the response header and a chunks enumerator to send asynchronously to the client. _ import play. 2. 5. play" %% "play-json" % "2. defaultContext import scala. §The Scala Configuration API. The reason for providing this abstraction is so For each controller used in the routes file, the router will generate a ‘reverse controller’ in the routes package, having the same action methods, with the same signature, but returning a play. If you’re not familiar with Typesafe config, you may also want to read the documentation on configuration file syntax and features. json package includes several features for constructing JSON from scratch, as well as for converting to and from case classes. Here is an example of how to inject a DatabaseConfig instance for the default database (i. For parsing JSON strings, Play uses super-fast Java based JSON library, Jackson. x, Scala and RethinkDB by Contains the public API for Scala developers. Let's build an API using Scala and the Play Contains the public API for Scala developers. info("Hello!") Define a Plugin class MyPlugin(app: Application) extends Plugin Create adhoc applications (for testing) val application = Application(new File(". parse() function. 8" import play. ConfiguredActor. immutable package. Play JSON API Basics. scala file. §The Play cache API. In order to work with Silhouette components we will create an abstract silhouette controller which will add silhouette components to the default play controller. Caching data is a typical optimization in modern applications, and so Play provides a global cache. JSON is a lightweight data-interchange format and looks like this: Feb 2, 2010 · This library contains both the Scala and Java APIs, under play. Future. Play is developer friendly with a "just hit refresh" workflow and built-in testing support. json package. Quickstart. This section introduces you to the most common aspects of writing a Play application in Scala. HttpEntity. pool. Justin Rodenbostel of SPR Consulting also has two blog posts on building REST APIs in Play: Building a Simple REST API with Scala & Play! (PART 1) Building a Simple REST API with Scala & Play! (PART 2) §Slick. Request => play. Example. Nov 6, 2024 · package controllers import javax. §Filters vs action composition The filter API is intended for cross cutting concerns that are applied indiscriminately to all routes. collection. Play supports this via its WS (“WebService”) library, which provides a way to make asynchronous HTTP calls through a WSClient instance. Sometimes we would like to call other HTTP services from within a Play application. ws and play. In this tutorial, you learn how to: Create a web API project. Getting your Scala Play Framework REST API ready for real-world use involves careful preparation and deployment. , The play. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. Create a controller with CRUD Sep 5, 2024 · Putting Your API Online. Result) function that handles a request and generates a result to be sent to the client. getClassloader, None §Actions, Controllers and Results §What is an Action? Most of the requests received by a Play application are handled by an Action. asJson. To provide JSON functionality for Jun 28, 2016 · 文章浏览阅读6. They contain build files and have instructions of how to run. Third, there are other implementations supporting contemporary versions of the CacheApis bundled within Play Nov 18, 2024 · 【标题】"play-java-rest-api-example：在Java中使用Play的REST API" 是一个示例项目，它展示了如何使用Java和Play Framework构建RESTful服务。Play Framework是一个流行的、开源的Web应用框架，专为现代Web开发设计 §JSON basics. name. Dec 3, 2019 · This tutorial teaches the basics of building a web API with the Scala Play Framework. By leveraging Java’s non-blocking HTTP capability, we’ll be able to smoothly query external resources without affecting our own main logic. A classic CRUD application with Play 2. All the Scala APIs are under the play. _ 包。2. DatabaseConfigProvider类的典型用法代码示例。如果您正苦于以下问题：Scala DatabaseConfigProvider类的具体用法？Scala DatabaseConfigProvider怎么用？Scala DatabaseConfigProvider使用的例子？那么, 这里精选的类 Nov 19, 2024 · Example projects. §RethinkDB. g. Names import play. Implicits. api package; all the Java APIs are under play. For building simple, CRUD-style REST APIs in Scala, the Play Framework is a good solution. For any data stored in the cache, a regeneration strategy needs to be put in place in case the data goes missing. Introduction. scala. JSON is a lightweight data-interchange format and looks like this: Below is an example of using our HelloActor with the ask pattern: import play. hmrc/bootstrap-play-25. For example, suppose I have the following class: case class Resident (name: String Aug 16, 2018 · Here Scala String represents our HelloWorld case class in String format. 8, for Scala 2. The play. import play. 解析类库位于 play. Using Akka under the hood, you get all the benefits of a Aug 26, 2024 · Play框架的Scala REST API示例是轻量级弯曲（Lightbend）提供的一款演示应用，展示了如何使用Play框架结合 Scala语言 来构建RESTful API。 此项目作为官方指南的一部 §Main concepts for Scala. x, Scala and RethinkDB by You signed in with another tab or window. Mar 18, 2024 · class CustomErrorHandlerSpec extends PlaySpec with GuiceOneAppPerTest with Injecting with Eventually { "CustomErrorHandler" should { "redirect when a page has not been found" in { //given val objectUnderTest = new CustomErrorHandler() val request = FakeRequest(GET, "/fake") val statusCode = StatusCodes. I’m sure I’ll keep writing more about the Play Framework and Anorm, but for today, I hope these Anorm example queries are helpful. For building simple, CRUD-style REST APIs in Scala, the Play Framework is a good solution. en = "myapp. Want to create a powerful REST API Making a REST API in Play, a multi-part guide using the Scala API, by the Lightbend Play Team. Like other Play JSON API, JsPath is also defined in play. com. qgyyvr uesnnn jksea mhzpr ugjzc wfpp rsulato foh wdpagcb ftiu