معرفی فریم‌ورک پلی: توسعه وب با جاوا و اسکالا

Enter the world of rapid web application development. This gentle introduction to Play covers all you need to know: it carefully introduces the background concepts before diving into examples, making learning Play 2 enjoyable (it includes the latest Play framework version 2.8). Introducing Play Framework is crisp, up-to-the-point, and full of valuable information. You will find chapters covering the basics of Play, the sbt build system, the Ebean ORM, web services using Play, production deployment, cache, and more with actual pragmatic code snippets for common tasks. After reading and using this book, you'll be able to build and deploy Java-based web applications with the Play framework. What You Will Learn Use the Play framework to do rapid Java-based web application development Work with Play controllers and Play views Create web services using JSON and XML Persist data and access databases Use Play modules Carry out asynch programming Cache, deploy, and work with code snippets in Play Who This Book Is For Those with at least some prior experience with Java. Table of Contents 5 About the Author 10 About the Technical Reviewer 11 Preface 12 Chapter 1: Getting Started with Play 2 14 Getting Ready 14 Installation 14 Prerequisites 15 Installing sbt 15 Installing conscript 15 Installing Giter8 16 Setting Up Play 17 Using Play Example Projects 17 Using sbt 19 Installing a Java Project Using sbt 20 Installing a Scala Project Using sbt 20 Creating Your First Project 21 app 22 conf 23 build.sbt 24 project 24 public 24 lib 24 test 25 Configuring Play to Work with Your Preferred IDE 25 Setting Up in Eclipse 25 Setting Up in IntelliJ 28 Hello World Application 30 Configuration 32 Controller and View 35 View 37 Controller 37 Enhancing the View 39 Testing Play Applications 40 Testing Views 41 Testing Controllers 42 Chapter 2: Build System 45 Scala Build Tool/Simple Build Tool 45 Core Principles 45 Benefits of sbt 46 Project Structure 47 Using sbt 48 Setting Definition 51 Resolvers 54 Complete build.sbt 54 Complete plugins.sbt 55 Quick Recap of SBT Commands 55 Chapter 3: Play Controllers and HTTP Routing 57 MVC Programming Model 57 Model 58 View 60 Controller 60 HTTP Routing 60 Static Definition 62 Dynamic Parts in a URL 62 Passing Fixed Values 64 Optional Parameters 65 Application Configuration Using application.conf 65 Controllers 66 Finishing the Bookshop Controller 68 saveComment Method 70 Testing the saveComment Action 71 Models 72 Scoped Objects 73 Session Scope 74 Flash Scope 76 Chapter 4: Play Views and Templating with Scala 77 Composite Views 78 Designing a General Template 80 Code Snippets Templating Basics 81 Comments 82 Template Parameters 82 Import Statement 83 Iterating a List 84 Iterating a Map 84 If Blocks 85 Escaping Dynamic Contents 86 Chapter 5: Concurrency and Asynchronous Programming 87 What Is Concurrency? 88 Executor 88 Example 1: Using Runnable 90 Example 2: Using Callable 92 Asynchronous Programming with Play 94 Writing an Asynchronous App 95 Configuring Asynchronous Scheduled Jobs 96 Akka Basics 96 Chapter 6: Web Services, JSON, and XML 99 Consuming Web Services 100 Processing Large Responses 103 Handling JSON 106 Consuming JSON Request 106 Producing a JSON Response 109 Handling XML 110 Example 1: Simple XML Parsing 111 Example 2: XML Parsing Using JAXB 112 Chapter 7: Accessing Databases 117 Configuring Database Support 117 Working with an ORM 121 ORM Concepts 121 Key Terms 123 One to Many 123 Many to One 123 Many to Many 123 Relationship Direction 123 Configuring JPA 125 Using Ebean in Play 130 Ebean Query 132 Common Select Query Constructs in Ebean 137 where() 137 eq() 137 like() 137 orderBy() 137 findUnique() 138 findList() 138 LIMIT {max rows} [ OFFSET {first row} ] 138 The Query Interface 138 Using RawSql 140 Relationships in Ebean 142 Chapter 8: Complete Example 144 Chapter 9: Using Play Modules 168 Creating a Module 169 Third-Party Modules 172 Chapter 10: Application Settings and Error Handling 173 Filters 174 Action Composition 178 Error Handlers 180 Client Errors 180 Server Errors 180 How Global Settings Were Done Before Play 2.6.x 182 Chapter 11: Working with Cache 185 Configuring Caffeine 185 Adding Caffeine to a Project 186 Configuring EhCache 187 Using the Cache API 187 Chapter 12: Production Deployment 192 Configuring Apache httpd for Play 193 Load Balancing Using mod_proxy_balancer 193 Configuring Play with Nginx 194 Index 196 Enter the world of rapid web application development. This gentle introduction to Play covers all you need to know: it carefully introduces the background concepts before diving into examples, making learning Play 2 enjoyable (it includes the latest Play framework version 2.7). Introducing Play Framework is crisp, up-to-the-point, and full of valuable information. You will find chapters covering the basics of Play, the sbt build system, the Ebean ORM, web services using Play, production deployment, cache, and more with actual pragmatic code snippets for common tasks. After reading and using this book, you'll be able to build and deploy Java-based web applications with the Play framework. You will: Use the Play framework to do rapid Java-based web application development Work with Play controllers and Play views Create web services using JSON and XML Persist data and access databases Use Play modules Carry out asynch programming Cache, deploy, and work with code snippets in Play