1 00:00:01,410 --> 00:00:06,510 Welcome back! In the step, will get the big picture of Spring Boot. What are the goals, 2 00:00:06,800 --> 00:00:13,960 What's Spring Boot is not and what are the features. Today world moving toward Micro Services 3 00:00:14,360 --> 00:00:17,560 Instead of developing large monolithic applications. 4 00:00:17,590 --> 00:00:20,290 We're building a lot of micro services. 5 00:00:20,350 --> 00:00:27,860 So instead of building one big application, we are building 20-25 maybe 50 smaller micro services. 6 00:00:27,860 --> 00:00:33,180 One of the important things with these micro services is you would want to be able to build them quickly. 7 00:00:33,200 --> 00:00:36,120 That's where Spring Boot comes in. 8 00:00:36,230 --> 00:00:39,870 In the last couple of years Spring Boot has gained a lot of ground. 9 00:00:39,950 --> 00:00:45,350 It has quickly become the number one framework to develop micro services in the Java world. 10 00:00:45,350 --> 00:00:47,860 How did sping boot achieved this? 11 00:00:47,960 --> 00:00:52,430 That's where we would discuss about the goals and the important features. 12 00:00:52,460 --> 00:00:56,790 What are the most important goals of Spring Boot. 13 00:00:56,930 --> 00:01:03,500 The most important goal of Spring Boot is to enable building production ready applications quickly. 14 00:01:03,500 --> 00:01:11,180 The other important goal is to provide all the common non functional features. embedded servers, metrics 15 00:01:11,870 --> 00:01:15,100 health checks and externalised configuration. 16 00:01:15,140 --> 00:01:17,870 We'll talk about these features a little later. 17 00:01:17,870 --> 00:01:27,320 These are the two important goals of Spring Boot - A) To enable you to quickly build applications and also provide 18 00:01:27,350 --> 00:01:29,900 common non functional features. 19 00:01:29,960 --> 00:01:36,840 Before we go more in depth into Spring Boot you also need to understand what Spring Boot is not. What 20 00:01:36,860 --> 00:01:37,300 Spring Boot is 21 00:01:37,310 --> 00:01:40,380 not is there is no code generation at all. 22 00:01:40,400 --> 00:01:46,130 Some of the people call Spring Boot as a code generation framework. Actually Spring Boot does zero code 23 00:01:46,130 --> 00:01:50,240 generation and that's what makes this concept really great. 24 00:01:50,240 --> 00:01:56,000 The second thing, Spring Boot is neither an application not a web. Spring Boot 25 00:01:56,000 --> 00:02:05,570 provides great integration with embedded servers like Tomcat, Jetty but by itself Spring Boot is not a web 26 00:02:05,570 --> 00:02:06,110 server. 27 00:02:06,110 --> 00:02:09,740 It's not a application server. These are two things that you would need to remember. 28 00:02:09,740 --> 00:02:14,780 There is no code generation in Spring Boot and Spring Boot is neither an application server nor a web 29 00:02:14,780 --> 00:02:15,170 server. 30 00:02:15,180 --> 00:02:20,580 Now that we understood the goals and also understood what Spring Boot is not. 31 00:02:20,810 --> 00:02:25,170 Let's look at how Spring Boot achieved these things. 32 00:02:25,250 --> 00:02:31,450 The most important part of Spring Boot is this concept called Starter projects. 33 00:02:31,610 --> 00:02:34,690 Consider example of developing a web application. 34 00:02:34,730 --> 00:02:38,800 If let's say I want to develop a web application I would need Spring MVC. 35 00:02:39,020 --> 00:02:40,360 I would need Spring core. 36 00:02:40,640 --> 00:02:42,780 I would need some validation framework. 37 00:02:43,010 --> 00:02:48,530 I would need some logging framework. In addition to that, I would need to configure all this stuff that 38 00:02:48,530 --> 00:02:49,610 is needed. 39 00:02:49,670 --> 00:02:54,380 For example, if I'm using Spring MVC, I would need to configure dispatcher servlet. I would need to configure 40 00:02:54,550 --> 00:03:00,470 view resolveser and a lot of things like that. However, with Spring Boot starter project 41 00:03:00,500 --> 00:03:02,840 it becomes very easy. 42 00:03:02,900 --> 00:03:08,780 All that you need to do is to add a starter called Spring boot starter web into your project and that's 43 00:03:08,780 --> 00:03:10,850 it. You'll get to Spring MVC for free. 44 00:03:10,850 --> 00:03:12,230 You get Spring core for free. 45 00:03:12,230 --> 00:03:17,150 You get a validation framework for free and also a logging framework for free. 46 00:03:17,150 --> 00:03:22,370 Similarly, for JPA there is a starter called Spring Boot starter JPA. 47 00:03:22,460 --> 00:03:23,740 Once we use this starter. 48 00:03:23,780 --> 00:03:29,900 You would not only get JPA but also a default implementation of JPA with Hibernate and also auto 49 00:03:29,900 --> 00:03:31,410 configuration of that. 50 00:03:31,430 --> 00:03:37,560 So you would not need to worry about the framework part and you can directly start creating your entities. 51 00:03:37,560 --> 00:03:41,810 Another important feature we already talked about is embedded servers. 52 00:03:41,950 --> 00:03:48,940 Let's say I am developing a web application I would want to deploy it on to a Linux box. 53 00:03:49,040 --> 00:03:54,890 In the olden days the way it used to work is first I would need to install the Linux box. 54 00:03:54,890 --> 00:04:00,230 Then I would install java on it and then I would need to install a web server. So I would need to install either 55 00:04:00,230 --> 00:04:07,060 Tomcat, weblogic or webspher and then I would take my application war and deploy it. 56 00:04:07,070 --> 00:04:12,620 This is the usual way we use to deploy stuff. With Spring Boot, comes a concept called embedded 57 00:04:12,620 --> 00:04:18,830 server. What you can do is you can package your server. So you can package Tomcat along with your 58 00:04:18,830 --> 00:04:28,070 application jar. So I can include the Tomcat server in my application jar. So I don't need to install it 59 00:04:28,340 --> 00:04:29,910 on the Linux box. 60 00:04:29,990 --> 00:04:35,020 So all that I need to do, on the Linux box is if I have Java installed that's sufficient. 61 00:04:35,030 --> 00:04:37,440 I can go ahead and run my application. 62 00:04:37,550 --> 00:04:43,920 I don't need any other server installed on the linux box. In the world of Micro services, 63 00:04:44,000 --> 00:04:46,320 this makes a huge difference. 64 00:04:46,580 --> 00:04:53,630 And also, Spring Boot provides a number of production ready features. Spring Boot provides monitoring 65 00:04:53,630 --> 00:04:57,770 for your application through something called Spring Boot actuator. 66 00:04:57,830 --> 00:05:04,800 For example, you can find out how many times a particular service is called. You can find out how many times a particular 67 00:05:04,800 --> 00:05:10,840 service failed and also you can check whether the application is up and running or not. 68 00:05:10,860 --> 00:05:14,110 All these features come built in. 69 00:05:14,370 --> 00:05:21,420 And another important feature that Spring Boot provide is externalised configuration. The configuration 70 00:05:21,420 --> 00:05:27,660 of applications varies between different environments. Your configuration from dev different from your 71 00:05:27,660 --> 00:05:29,830 configuration in production. 72 00:05:29,850 --> 00:05:33,740 Spring Boot provides these features built in. 73 00:05:33,780 --> 00:05:41,340 You can simply create property files matching a simple naming convention and that's it. You're ready 74 00:05:41,340 --> 00:05:48,030 with externalised configuration. Spring Boot also provides support for different profiles. 75 00:05:48,030 --> 00:05:52,670 These are some of the important goals and features of Spring Boot. 76 00:05:52,740 --> 00:06:00,350 The idea behind this step is to understand the big picture of Spring Boot. What it is, what it is not 77 00:06:00,630 --> 00:06:07,680 and what are the important features. In the next steps, we will dig deeper into each one of these things. 78 00:06:08,130 --> 00:06:09,540 Until the next step, bye-bye.