#5 What is Spring Boot?
Summary
TLDRThis video introduces Spring Boot, a powerful framework that simplifies the configuration and deployment of Java applications. The speaker explains the traditional challenges of setting up Spring applications, such as object creation and server configuration with Tomcat. Spring Boot addresses these issues by embedding a Tomcat server and providing a quick start with minimal configuration. The tutorial demonstrates creating a simple 'Hello World' application with Spring Boot, showcasing its ease of use and rapid deployment capabilities. The video also touches on the trade-offs between Spring Boot's convention-over-configuration approach and the need for customization.
Takeaways
- 🌟 Spring Boot is designed to simplify the bootstrapping and development of new Spring applications.
- 🔧 Spring Boot handles a lot of the configuration automatically, reducing the need for manual setup compared to traditional Spring Framework applications.
- 🚀 Spring Boot allows for quick project setup and can get a project running in a matter of minutes, which was a challenge with the Spring Framework.
- 🛠️ Spring Boot includes an embedded server like Tomcat, eliminating the need for external server installations and configurations.
- 📦 Spring Boot projects can be packaged as a JAR file, which can run standalone without the need for a WAR file and an external server.
- 🌱 Spring Boot promotes the use of convention over configuration, which can speed up development but may also include dependencies that are not needed for every project.
- 📝 The script mentions the use of 'start.spring.io' for generating new Spring Boot projects with specific configurations and dependencies.
- 🔄 Spring Boot is built on top of the Spring Framework, and it is not a separate project but an additional layer that simplifies the process of building applications.
- 🌐 The script demonstrates creating a simple 'Hello World' application using Spring Boot, showcasing the ease of creating and running a basic web service.
- 🛑 While Spring Boot is beneficial for quick setups, it may include unnecessary configurations and dependencies, which could be a drawback for those who prefer more control over their setups.
- 🔑 The choice between using Spring Boot and the Spring Framework depends on the developer's preference for ease of setup versus the need for more granular control over configurations.
Q & A
What is the main purpose of Spring Boot?
-Spring Boot is designed to simplify the bootstrapping and development of new Spring applications, handling complex configurations and allowing for quick project setup and deployment.
How does Spring Boot differ from the Spring Framework?
-Spring Boot is built on top of the Spring Framework, providing additional layers that simplify the process of building projects by handling configurations automatically and embedding a Tomcat server for web applications.
What is the significance of Spring Boot's embedded Tomcat server for web applications?
-The embedded Tomcat server in Spring Boot allows developers to run their web applications without the need for an external server, which streamlines the deployment process and reduces the setup time.
Why might a developer choose to use Spring Framework over Spring Boot?
-A developer might prefer the Spring Framework for more control over configurations and to avoid the automatic inclusion of dependencies that may not be needed for their specific project.
What is the role of 'start.spring.io' in creating a Spring Boot project?
-'start.spring.io' is a website that provides an easy way to generate a Spring Boot project with the desired dependencies and configurations, speeding up the project creation process.
How does Spring Boot handle object creation in an application?
-Spring Boot, like the Spring Framework, manages object creation through its dependency injection mechanism, allowing developers to specify which classes should have their objects created and managed.
What is the benefit of using Spring Boot for experimental projects or quick prototyping?
-Spring Boot's simplified configuration and quick setup process make it ideal for experimental projects or quick prototyping, allowing developers to focus more on the application logic rather than setup and configuration.
What is the default packaging type for Spring Boot applications?
-The default packaging type for Spring Boot applications is a JAR file, which includes an embedded server and allows for easier deployment and execution.
How does Spring Boot's convention over configuration approach affect the development process?
-Spring Boot's convention over configuration approach provides developers with sensible defaults for many common tasks, reducing the need for explicit configuration and speeding up the development process.
What are some of the dependencies included in a Spring Boot project generated by 'start.spring.io'?
-Some of the dependencies that might be included in a Spring Boot project are Spring Boot Starter Web, Jackson for JSON conversion, Micrometer for observability, and an embedded Tomcat server.
How can a developer test a simple Spring Boot application that returns 'Hello World'?
-A developer can test a simple Spring Boot application by running the application and accessing the specified endpoint, such as 'localhost:8080', in a web browser or using a REST client like Postman.
Outlines
😀 Introduction to Spring Boot and Its Advantages
The speaker, A Ready, welcomes viewers back and introduces the topic of Spring Boot, a framework designed to simplify the bootstrapping and development of new Spring applications. The video aims to receive 250 comments. The speaker explains that while the Spring framework is powerful for object creation and dependency management, it can be cumbersome for large projects due to its extensive configuration requirements. Spring Boot addresses this by reducing the need for configuration and allowing for quicker project setup. It is not a separate project but an additional layer on top of the Spring framework, making it easier to build applications by providing defaults and embedded servers like Tomcat. The speaker guides viewers on how to start a Spring Boot project using start.spring.io, emphasizing the ease and speed of getting a project up and running with minimal configuration.
🛠️ Setting Up a Spring Boot Project with Embedded Tomcat
This paragraph delves into the process of setting up a Spring Boot project with an embedded Tomcat server, eliminating the need for external server installations. The speaker demonstrates how to create a new Maven project using start.spring.io, selecting the appropriate Java version, packaging as a JAR file, and choosing necessary dependencies like Spring Web. The speaker also discusses the flexibility of Spring Boot, allowing developers to select only the components they need for their project. Once the project is generated and downloaded, the speaker shows how to import it into an IDE, such as IntelliJ Community Edition, and how the project comes with a pre-configured set of dependencies, including an embedded Tomcat server, which simplifies the deployment process. The speaker then creates a simple 'Hello World' REST controller to demonstrate the ease of creating and running a basic application in Spring Boot.
🚀 Running a Spring Boot Application and Its Trade-offs
The speaker concludes the video by running the 'Hello World' Spring Boot application, showcasing how quickly and easily a project can be executed with minimal setup. The application runs on an embedded Tomcat server on port 880, and the speaker tests it by accessing it through a web browser, successfully retrieving the 'Hello World' message. The speaker also discusses the trade-offs of using Spring Boot, such as the convention over configuration approach, which can sometimes include unnecessary components by default. However, the speaker expresses a preference for Spring Boot due to its ease of use and rapid development capabilities, while acknowledging that some developers may prefer the more granular control offered by the traditional Spring framework. The video ends with a reminder of Spring Boot's benefits in simplifying Java development and a teaser for the next video.
Mindmap
Keywords
💡Spring Boot
💡Spring Framework
💡Configuration
💡Tomcat Server
💡Embedded Tomcat
💡Maven Project
💡Dependencies
💡@RestController
💡@RequestMapping
💡Convention over Configuration
💡start.spring.io
Highlights
Introduction to Spring Boot and its purpose in simplifying the configuration process of Spring Framework applications.
The Spring Framework's role in object creation and dependency management within Java applications.
The limitations of Spring Framework in handling large numbers of classes and the need for selective object creation.
The necessity of configuring the Spring Framework through XML or property files to specify which classes to instantiate.
The requirement of a server like Tomcat for running web applications built with Spring, and the associated setup challenges.
The contrast between the quick setup of modern languages like Python or JavaScript and the initial complexity of setting up Java applications.
The introduction of Spring Boot as a solution to streamline the project setup and reduce configuration time.
Spring Boot is not a separate framework but an additional layer on top of the Spring Framework, simplifying the development process.
The ability of Spring Boot to automatically configure embedded servers like Tomcat, eliminating the need for external server installations.
The demonstration of creating a Spring Boot project using start.spring.io, a website that simplifies the project setup process.
The ease of selecting project dependencies and configurations through the start.spring.io interface.
The option to choose between a WAR or JAR packaging in Spring Boot, with the latter including an embedded Tomcat server.
The explanation of how Spring Boot's embedded server functionality allows for quicker deployment without the need for external servers.
The process of generating a Spring Boot project with specific dependencies and configurations using start.spring.io.
The simplicity of creating a 'Hello World' application in Spring Boot and running it with minimal setup.
The demonstration of running a Spring Boot application and accessing it via a web browser, showcasing the ease of use.
The comparison between Spring Boot and Spring Framework in terms of ease of use, control, and default configurations.
The acknowledgment of potential issues with Spring Boot's convention over configuration approach and its impact on customization.
The final thoughts on the benefits of Spring Boot for rapid application development and its impact on Java's reputation for being slow.
Transcripts
welcome back aliens my name is a ready
and in this video we'll talk about
spring boot so before we talk about
spring boot the target for this video is
250 comments now till this point we have
talked about spring framework right and
we are excited to understand how this
framework works and whatever things it
promises how it deals with that so yes
spring framework is amazing right and
whatever application we are going to
build now is with the help of spring so
let's say you want to build an
application this can be anything in the
world even it can be a huge application
or it can be a application for hello
world typically what happens is when you
want to build the application of course
you have your Java code with you and
then to make it work spring says hey you
know doesn't matter how many classes you
have I will take care of the object
creation and you are quite happy because
now you don't have to worry about the
objects spring says I will take care of
it so let's say in your application you
have you have three classes and you say
hey Spring create object of this three
classes and spring is happy to do that
so let's say in your application now you
have 100 or thousand classes can spring
handle all the objects of course it can
but the question is do you want spring
to handle all the classes you know most
of the time we don't even want the
object of few classes let's say you have
lot of classes here and out of all these
classes you need objects of only few
classes how do you talk to your spring
framework by saying hey don't create
objects for everything I don't want all
those things I just want few spring says
okay tell me which one you want and
that's where when you talk to the
framework we have to do that in the
configuration file it can be XML file or
it can be a property file but you have
to talk to the framework that means just
because you're using a framework you
will not be able to run your code in the
first go you have to first do the
configuration next part let's say if you
are building a web application now if
you want to run your web application
basically you need a server in terms of
java uh we need something called a
tomcat server of course we have multiple
options let's say if you want if you're
building a web application in Spring you
need to have a tomcat server that means
in your machine even before you run your
code you have to make sure that you have
installed Tomcat you have configured
Tomcat then only you can run your
application so you'll be saying hey
what's wrong with that I mean of course
we can do configuration we can install
Tomcat see the problem is when you have
a long project it makes sense to spend
few hours or days doing the
configuration because the project will
go for a year but what if you are doing
some experiment what if you want to get
started in few minutes see most of the
languages nowadays they are doing that
if you talk about python or JavaScript
they have their Frameworks and if you
want to at least print hello world you
can do that in minutes now this is what
spring was lagging way back and Java was
lagging way back and that's where we got
something called a spring boot now
spring boot says all your problems of
configuration let me take care of it
what if you can get your project running
in few minutes and that's what spring
boot gives you it's not a new project is
there from a long time but it basically
solves your problem of building a
project in less time so does it means
that spring boot is different from
Spring framework not exactly see
underlying it's all spring framework
right on top of that you have one more
layer of spring boot so you can actually
build application directly using spring
framework or if you want to make it easy
you can use spring boot again that's an
optional stuff but this optional thing
is very very important and uh it will
make your work faster so basically we
can use a spring boot which is a open
unated framework which means it will
give you certain things the way it wants
and you can simply use it to run your
application let me show you how what I'm
talking about so let's say if I go to
the spring.io the official website and
instead of this website if I just say
start. spring.io it will take you to a
website now see when you talk about
building a project in different idees we
have an option of directly saying a new
project and you can create a spring
project in spring project basically you
create a mavin project again we'll see
that in in sometime or in the upcoming
videos but basically you have to create
a m project at the spring dependency a
lot of different steps right inell idea
ultimate version gives you a an option
of creating a spring boot project
directly but since we are not going to
go for the ultimate version we don't
want to pay for it we have a good
alternative what you can do is you can
go to Spring Riser which is this website
start. spring.io and you can mention
what kind of project you are building so
I'm building a MAV project this is a
build tool the language I'm going for is
Java and then the spring boot version so
this is update version so you can see we
have 3.2.5 we can even go for the rc1
but I just want to stick to the stable
one which is uh 3.2.5 and depend upon
when you're watching this you can just
use that particular version the group I
will say com. telescope and the project
name is let's say uh demo app and then
the packaging is I'm going for Java now
this this is where the beauty lies you
know if you talk about a spring
framework or any web application in Java
you can create a project and if you want
to deploy it on the cloud basically you
create a v file so v v stands forb web
archive and then you basically push your
W file in the Tomcat to run it multiple
steps right spring boot says don't worry
you can create a jar file but the
problem is jar file we cannot run jar
file on the Tom Cat then how it would
work what if you don't need external Tom
Cat what if the project itself has a
tomcat I mean that will be awesome right
so basically spring boot says if you
want to build a web project you will get
a embedded tom cat so I will select jar
and I'll show you what I'm I'm talking
about and then I can select my Java
version so in this machine I got Java 21
so I will go with that it is LTS version
so it's safe to use and dependency so
what are things we need so of course if
you remember when we talked about spring
framework I mentioned that there are
multiple projects inside spring and we
don't need all depending upon your use
case you will choose one so I will click
on ADD
dependencies so you can see there are
lot of options here to choose from and
you don't have to know everything uh use
whatever you need example here I want to
build a web application so I will simply
say uh spring web if you want to add
database connectivity you can also add
uh jpa but we don't need that at this
point uh if you want to get a longbox
support you can choose that if you want
to uh use graphql you can use that uh so
as I mentioned there are so many options
here but I just want to stick to one
which is bring web and click on generate
now before I click on generate I will
show you how this configuration looks
like so it will give you the entire
configuration we can see we got a
dependency which is spring boot stter
web here the Java version is 21 this is
my project name and this is the spring
boot version which we are using and
behind this it will use spring framework
I will show you the code so click on
download you can even click on the uh
generate here so you can see in the
downloads I got this project which is
demo app what I will do is I will just
unzip it so unzipping is done on the
other screen but uh I will just open
that project now in my ID now you can
use any ID here you can use Eclipse you
can use vs code you can use intellig
idea Community version version or theate
version so I'm using a community version
here just to show you the proof I will
click on not update I will click on
about and you can see this is a
community version and I will click on
open the project so this is the project
which I've downloaded click on open and
voila you got your project and the
beauty is if I expand the dependencies I
think it will take some time to download
okay download it too fast and you can
see it added so many dependencies here
uh the for the Jackson for Json
conversion uh we got uh micrometer for
observing we got Tomcat you can see we
got embed Tomcat so basically you don't
need to have the external Tom Cat here
and if you go down uh we got spring boot
but also we got spring framework you can
see we got spring code so all the things
which are spring required for spring
code or spring project we got it here
okay uh let me just drop it here and now
let me create a hello world so what I
will do is just to create Hello World
now if you have worked with s or any
other language before uh basically we we
do multiple steps right but let me show
you the code in Spring which will print
hello world I'm I'm not going to explain
everything in this video how spring web
works we have a separate section on that
but just to show you how to build
application I will get a class and I
will name this class as
hello I'll just simply say hello and
then I will just return I will create a
method here and this method is
responsible to print hello world on the
screen so I will say public string I
will simply say
greet and this will return hello world a
very simple method right nothing fancy
for Server a simple class is just that
if you want this to work you simply say
here rest controller and we have to map
it with again I'm not explaining it here
we have a detailed topic on this what is
request mapping what is rest controller
we'll talk about it at this point just
go for two annotations and say I will
say slash so basically whenever you
request for the homepage it will return
the hello world that's what I want or
maybe I can say hello world welcome to
telescope
okay cool and now let's run this how do
we run this so you go back to your
application or the main file and simply
say run behind the scene it will of
course compile the code it will run this
on a tomcat just have a look and when
you run for the first time it will print
this spring uh pattern here you can
change it if you want uh but we are
concerned about this or we want to focus
on this so Tomcat started on port number
880 nowhere externally I'm using Tomcat
okay a very simple stuff and I'm saying
run on 880 I got it how do I test it of
course you can use a rest client like
Postman or I will just open the browser
and here I will say Local Host colon 880
enter and if you can see we got the
answer we got response which is Hello
World welcome to the lco it's so simple
right and how much time it took me to
run this of course I was talking to the
camera and doing this so it will take it
took a lot of time but if you want to do
this you can do that in minutes so you
got your application up and running in
minutes that's not the case with spring
framework and you will see that once we
start with spring later so this is
spring boat behind the scene it is still
spring framework now the question is is
it better than spring of course right it
will help you but there are certain
issues with spring boot as well of
course not a big issue one of the issue
is by default it will do a lot of stuff
for you so it basically follows
convention over configuration because in
Spring we do a lot of configuration here
it says I will give you stuff you tell
me what you want I will give it to you
and most of the time it also gives you
certain things which you don't want
example if you expand this libraries
here there are so many things maybe I
will not even going to use this but
spring boot says take it okay so that's
one and next since it gives you a lot of
default stuff if you want to configure
then of course you have to do those
configuration by yourself that means if
you want more control it is better to
work with spring framework than spring
boot again debatable uh personally I
prefer spring boot if I want to work on
a project I'm happy to do the
configuration in Spring boot but yeah
people might prefer spring framework for
that reason it's still debatable but
spring boot is awesome so yeah that's
one of the issue and um yeah that's
about it I wanted to show you what is
spring Boot and people who cry about
Java being slow Java being
wos spring boot is here it will make
your work easy see you in the next video
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