Introducing Spring Data REST

As you know Spring Boot takes a very opinionated approach to configuration of 0:00 your web applications. 0:04 If you don't override the configuration what will get set up automatically is 0:05 probably exactly what you wanted or at least that's the claim of the framework. 0:09 I find the convention over configuration approach is exactly what I want. 0:13 Almost all of the time I've always been thoroughly impressed with what you get out 0:17 of the box from a Spring Boot project. 0:21 And as you saw in spring data similar auto magic things happen. 0:24 You simply define an interface and make it match a naming structure and 0:27 blammo you have a working method that queries or 0:31 entities whatever back in database you might choose. 0:33 It's super powerful, extremely intuitive and such an amazing time saver. 0:36 Well there is a project that works in a similar start simple 0:41 add complexity of events. 0:43 Spring data rest is quite literally the combination of both of these projects 0:45 and a few more. 0:49 Its mission is to take the repetition out of building a REST API. 0:50 Much like how Spring Boot assumes that if you put a vendor's database 0:54 in your class path it means that you want to have your app configured to use it. 0:58 Spring data rest assumes that if you've built a repository 1:02 that you intend to expose it as a rest collection and resource. 1:05 You can of course change that assumption but it's created for 1:09 you in the most common use case that you're gonna need. 1:12 There's another project in the Spring family and 1:15 that's called Spring HATEOAS which provides, as you might have guessed, 1:17 APIs that help you build discoverable rest representations. 1:22 Spring Data REST has this project installed and turned on by default. 1:26 This means it will automatically generate all the links and representations. 1:30 We'll walk through all those things here in a bit. 1:34 And I realize that I sound like one of those sketchy infomercials actors and 1:36 you're waiting for the catch. 1:40 But wait there's more, not only does it automatically produce a rest API it slices 1:41 POJO that dices JSON, it serves of schemas. 1:45 Now one of the problems in behind the scenes magic that this type of library 1:48 produces is that most of the time you have no idea what's being automated. 1:52 Now I'll do my best to point out what is happening behind the curtain 1:55 while not distract you from how to use this lifesaving tool to 1:59 rapidly build REST full APIs. 2:01 Like that sketchy information person might offer you 2:04 come on in take a test drive no obligation, money back guarantee. 2:07 And it's a free and open source so. 2:10 All right so let's get this thing installed. 2:13 So I'm going to make a new gradle project an IntelliJ IDEA. 2:15 So over here I've got Gradle selected it's got my version, I'm gonna click Next. 2:19 And for the Groupid were gonna do our favorite com.teamtreehouse. 2:23 And the Artifactid, let's have our jar be named course-reviews-api. 2:28 Okay, and on this page, let's make sure that we check create directories for 2:37 empty content routes automatically, so that those directories get built for 2:41 us and we don't need to do it, awesome. 2:44 Choose Next, and then finally that looks good. 2:46 Great, okay, so let's install our dependencies. 2:51 So let's open up our build.gradle file which is right here. 2:54 And I'm going to apply the suggestion so that the gradle wrapper comes along. 2:59 So the first thing I'm gonna do is I'm going to change this 1.5 to 1.8 so 3:05 that we're using Java 8, right? 3:09 Now we definitely want to include the spring boot great all plugins. 3:11 So we get the auto versioning of our imports, right? 3:16 So to do that what you need to do first is you need to add a build script up here. 3:19 So we're gonna say buildscript, make the new 3:22 closure there and the repositories section and 3:27 on mavenCentral there is a plugin that we're gonna wanna use. 3:33 So classpath and here is org.springframework. 3:40 This is all in the teacher's notes by the way, 3:47 boot spring-boot-gradle-plugin. 3:51 And at the time of this video, we are 1.3.3.RELEASE, 3:55 I will try to keep that updated. 4:00 Okay, great so now we have a build script closure so 4:05 now what that means, is we can apply the plugin. 4:07 So we have a new plug in to apply. 4:11 Apply plugin and the name of that is spring-boot. 4:14 That brings along awesome stuff where we don't need to say the version of 4:18 the dependency that we're talking about. 4:21 So the dependency that we wanna add here is we 4:23 wanna say compile and we want to bring across 4:28 org.springframework.boot:spring-boot-star- ter-data-rest. 4:34 So it's spring-data-rest is the project. 4:43 And we want to have a database set up so let's set that up first. 4:48 Let's make sure that we're using spring-data so we want 4:53 org.springframework.boot:spring-boot-star- ter-data and 4:58 we're gonna use the JPA probably look at that I could just copy that line. 5:04 Okay, so let's have our app use an H2 in memory database. 5:11 Here is one of those, I can't believe this is all you have to do moments. 5:17 Are you ready for this? 5:21 Check this out, all you do is add the dependency compile and 5:22 that is com.h2database:h2. 5:27 Whoa, right? 5:32 Okay, and so let's go over here and let's refresh our Gradle project make sure that 5:34 we've got everything working, takes a little bit the first time you do this. 5:38 It's doing all the downloads and sorts everything out. 5:42 Okay, and I had a little unindexed remote maven imposed profound. 5:44 Let's go ahead and click this that will get indexed next time. 5:48 Okay, and let's expand our dependencies and let's take a look. 5:51 Whoa, look at all those, wow. 5:54 So what do you say that we make use of some of these? 5:55 Let's take a quick break and then let's start building out our resources. 5:59