Kong Kongcast: The API Connectivity Series, 23 Mar 2022

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From YouTube: How Spring Changed Java Application Development | Josh Long | VMware | Kongcast Episode 13

Description

In this Kongcast episode, Josh Long, @SpringSourceDev Developer Advocate at VMware, dives into how Spring changed the way developers build Java applications and introduces you to Spring Native.

Get Started with Spring: https://spring.io/guides
Learn More: https://spring.io/blog

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▬▬▬▬▬▬ TIMECODES ▬▬▬▬▬▬
0:00 Kongcast Show Intro
0:28 Welcome, Josh!
2:55 History of Spring
9:48 Current State of Spring
18:50 Intro to Spring Native
24:19 Demo: Spring Native
31:40 Thanks for Joining, Josh!
32:50 Kongcast Show Outro

▬▬▬▬▬▬ ABOUT KONGCAST ▬▬▬▬▬▬
Hosted by @ViktorGamov and Kaitlyn Barnard, we interview software developers and technology leaders at the top of their game every other week. We’ll also give you the tools, tactics and strategies you need to take your distributed architectures to the next level. Kongcast goes beyond the buzzwords and dissects real-life applications and success stories so that you can tackle your biggest connectivity challenges.

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❓ ️https://discuss.konghq.com/
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#SpringNative #Java #Kongcast

A

Kaitlyn barnard: hey, everyone., I'm kaitlyn barnard.

B

Viktor gamov: and I'm viktor gamov.

A

Kaitlyn barnard: in this series,, we chat with software developers and technology leaders to tackle your.

A

Biggest api connectivity, challenges.

B

Viktor gamov: stay tuned to this episode for tools, tactics, strategies that will help you to take your.

B

Distributed architectures to the next level.

B

well,, let's begin.

B

And today I am especially super excited to welcome josh long,, a spring developer advocate.

B

At vmware and my friend josh.

B

welcome to kongcast.

C

Speaker3: oh, thanks,, my friend., I missed you.. I was saying yesterday when we were talking about this, that I just regret. We couldn't do.

C

This in person, like we've done so many times, before.

B

Viktor gamov: yes., but I'm super excited that technology like cloud and all this, internet of everything.

B

Can connect us still. and we have a great conversation.

B

speaker3:, so yeah. viktor gamov: for those of you who don't know you as I do,. Can you briefly introduce yourself and what.

B

You do and what drives you?. What's your passions and things like that?.

C

Speaker3:, my name is josh long.. I work on the spring team., I'm a developer, advocate,, a google kotlin developer expert and a java champion,, and I.

C

Spend my time trying to help people build better software intended for production in.

C

Terms of spring and the spring ecosystem. and I, I've been doing that in my capacity as the first spring developer advocate since.

C

Since 2010.

B

Viktor gamov: yeah, 2010.. I saw your first time,, your presentation..

B

You did this presentation in 2011 in new york,. It was mongodb office and you were talking.

B

About the spring data project., I remember that.

C

Speaker3:, you were there in in new york and the mongodb day, thing.

C

Viktor gamov: yeah, yeah, yeah.

B

It was long time ago., speaker3:, and that is so wild.

C

That's a decade ago, man.

B

Viktor gamov: so- and there was a great time in the spring, actually went very long way since that time.

C

Speaker3: that was before spring boot mean spring cloud and all this., viktor gamov: exactly. exactly.

B

So and the thing exploded and microservices world exploded around what, 2014, 2018.

C

Speaker3:, I would say around then., yeah. and spring was, spring boot was super well positioned, to, to tap into that zeitgeist,. You.

C

Know, the. the wave of innovation and excitement around agility and getting to getting to.

C

Perception more quickly.

B

Viktor gamov: and I guess it was kind of like a perfect storm,, like people were looking for tools that.

B

Allowed them to break this monolithic application to build the services.

B

And the similar time many, many things, happened.

B

The heroku released their 12 factor app, manifesto,, very famous one.

B

And the folks at the time, it was pivotal, right?.

B

It already was not. the spring source start working on springboard.

B

Can you briefly tell our listeners some of the listeners here are not that familiar with.

B

The java ecosystem, as we are and like give give us some rundown, like what's why?.

B

It's why it is exciting how the spring actually changed the way how the people develop.

B

Apps in in the job world.

C

Speaker3:, you know, it's very funny. well, first of all, you're right about that., so there are spring source. Then in 2009, vmware bought spring source.

C

Then in 2013, spring and tomcat and revit and queue and cloud foundry and gem fire and.

C

Redis and all these sort of developer facing bits that were at vmware.

C

We all, we took all that stuff, green plum,. We took all that stuff and turn it into a new.

C

Company called pivotal., and I was part of that first wave of new pivotal.

C

I was there on day, zero, right?, the very first day we open our doors at pivotal..

C

I was an employee., so basically I had the same job, same team, same everything.

C

Just the name on the paycheck changed.

C

and we,, we just we created pivotal and that's when we created spring boot and when cloud.

C

Foundry got big as well. right, because of a again, owing a huge debt of gratitude to the heroku team who inspired.

C

Fleets of innovation, waves of innovation that would still ripple today.

C

It's funny you mention the people who may not know because again, you're right, that's.

C

2013, right? we're we're closer to a decade since spring boots. First 0.4 public release.

C

Yeah,, that was middle of 2013. so,, you know, that's a year and a half from now. basically, it'll be a decade., but spring has been lucky, right?.

A

Spring,, as you know,, and as maybe some others do.

C

Spring is one of those very few projects that has been white, hot, popular two different.

C

Times in its life. right., like imagine., imagine if struts from 2000 came back today and it was like the most popular thing, again,.

C

You know, that's what happened with spring. spring came out the first lines of code.. You can see code in spring from like 2000 or 2001, that was created by a gentleman named.

C

Rob johnson who wrote a book., he wrote a book about it that inspired others..

C

The the code in the book became an open source project that then became spring. That.

C

Inspired other people,, including juergen haller,, who still with the spring team.

C

He's still the lead of spring fabric today that inspired countless other people to hope.

C

For a better way to build software., you know.

B

Viktor gamov: right before that,, it was just like a big application servers like big, like basically a.

B

Representation of this, like a monolithic application that we're trying to fight.

B

And they actually the spring kind of paved the way, and everyone is followed.

B

Like the many specifications that happened after emergence of spring boot and even spring.

B

Itself, as a framework were in fact affected by the ideas that spring provided, like.

B

Lightweight things.: that's not super slow., like people thinking, still, people still thinking java is slow.

B

and we'll talk about this, like how this changed. With the recent release of spring.

B

Native. we're going to we're going to talk about this in many details,, but I want to try.

B

To kind of create this kind of vision., and so people will understand that it's actually innovation happens and the platform is.

B

Not stagnating,, it's actually evolving. and the microservices and the cloud and the serverless technologies that developers wants.

B

To be agile,, they wants to be delivering the features, develop, delivering the year.

B

Stuff to their users., they want to be fast., they don't want to wait.. They don't want to wait until everything will be running or starting up or things like.

B

That. right. and things around kubernetes and things around heroku and cloud foundry.

B

The cloud foundry, like, received a lot of inspiration from from many worlds.

B

And I super fascinated how it is actually evolved into something that can be very.

B

Ambiguous, right?, so you can run this pretty much like everywhere, similar, like you can.

B

If you want to run this on top of the various you can, you can do that.

B

Or like you can use the cloud fundraiser foundation to run your kubernetes and fix that.

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Speaker3: right. well,, so it's the other way around today..

C

You would run cloud foundry on top of kubernetes., so we have a now. so twist of fate,, right? tldr, pivotal eventually got merged back into vmware after we went public and all that.

C

I think vmware was sort of..

C

I don't know what the motivation was,, but basically it was to me it seemed like they're.

C

Really, really interested in becoming this developer. First company.

C

It was a very cool thing for them to do., and so they, the team's the the company of pivotal and hep tio, right?,.

C

Hep tio was a kubernetes company and it's because of that, by the way, that we have two.

C

Of the three founders of kubernetes working at vmware, and we're all part hep, tio and.

C

Pivotal. we're all part of this division called tan zu pt.

C

And you so you we have a kubernetes distribution, one of the best in the business.

C

We have tons of, we have a spring.

C

and so cloud foundry now sits on top of kubernetes,. If you want it to,, because cloudflare.

C

Is like an opinionated approach to building software.?

C

It's it's got guardrails., but if you use those guardrails,, it's super fast, right?.

C

It's like heroku in that respect., but still,. Something needs to manage the infrastructure and nothing is better..

C

Nothing in the world is better than that at that in kubernetes.

C

So yeah, it's a it's an interesting mix..

C

We've got a kubernetes distribution., we got. We hope we help people build scalable,, operational,, usable infrastructure and then.

C

We help them build apps that do well in that context, with spring.

B

Viktor gamov:, so the the way how the spring influenced some of the lighter version of everything if they.

B

Want like we talk about, tomcat was lighter version of this, like a gigantic application.

B

Server, like a website, was over the world and the way how the the spring and the tomcat.

B

And some of the dependency injection that spring brought up changed the way how people.

B

Want to develop their apps,, develop apps, springboard, change the way how they want to.

B

Develop apps. in the modern world, you want to have a faster turnaround of the things you.

B

Know,, the ones that don't want to do like recompile..

B

So that's why, like a spring toolkit that comes with the spring boot allows you to do.

B

This., you can change the code without doing restarts. Or.

B

My favorite personal favorite part integrating with third party services in a very.

B

Opinionated way. things spring, kafka.,.

B

My personal favorite part of spring projects.

B

I use this a lot and I taught this a lot and explain people how this stuff works and.

B

Gives us some of the opinionated way how to connect to the services plus use the services.

B

In the spring, opinionated way., so josh, so what is the new and exciting just happened a couple weeks ago I would say, or.

B

It's actually started happening for a while, and people were more or less ready.

B

But what technology influence and help to move forward?.

B

Speaker3:, it's okay, to be fair,, just to not to be technical about it,, but to be fair, a lot of.

C

Spring, you know, the best part about spring is that we package up good ideas and good.

C

Patterns into a way, that's approachable for the community.

C

So as much as I love spring boot- and I think it's the coolest,- nobody on the spring boot.

C

Team would tell you that spring boot created everything by itself, right?.

C

Of course not., that's just not the case. so, for example,. We drew a lot of inspiration from, for example, drop wizard,, which had a.

C

Lot of these great ideas before spring boot., we even used drop drop, wizard metrics in the first version of spring,, the one x line.

C

So I think that's what's really great about spring. Is it's always been,, you know,. We try.

C

And fill in the gaps, if they exist, but if,. If there's no gaps,, then we just use and we.

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Just integrate the best of breed ideas and technologies and all that.

C

So you can use spring and all these other things.

C

And that's what makes spring so durable, is that it works well with these other things,.

C

Like you just mentioned, the spring for kafka project.

C

and by the way, you and I have done talks on spring for apache, kafka and spring cloud.

C

Stream for kafka streams..

C

You know that we've done talks on that kind of stuff and I've learned a lot from you now., it's actually the, it's,. It's now to the point where I just look to your videos to learn.

C

Stuff about spring and apache kafka., so I appreciate that. now,, one of the.

B

Viktor gamov: things is,. Are you saying this?? It's it's really. I humbled.

C

Speaker3: oh, thank you., so I we're all grateful for the work you've done.

C

C

You know, one of the things that we've seen people trying to.

C

Make work of lightning. you mentioned this recently. Is we've seen people trying to make java work on gravel.

C

Now,, graham, is an ahead of time. Compiler.

C

It's also a just in time: compiler., right., so gravel is a piece of infrastructure that replaces hot spot,. You know,, if you.

C

Use it just like that, as it was originally intended, what I heard, the story that I.

C

Heard,, maybe this is apocryphal,, I don't know.

C

the story that I heard was that at some point they wanted to replace the just in time.

C

Compiler hot spot,, which is built into open jdk,, you know,, the project,, the open source.

C

Project, and that code is apparently a tangle of spaghetti c++ code that is hard to.

C

Maintain., so they wanted to replace that with something that would be easier to.

C

Understand and faster and all that., so they created vm,, which is an open jdk,, which is all it's exactly the same, except for.

C

There's a new just in time compiler instead of hotspot.

C

It's the vm just in time compiler and a just in time. Compiler is the piece of it's a.

C

Piece of secret source that makes java so amazing, right?.

C

If you've ever run java in production,, you probably know that you can deploy an.

C

Application and as it gets more traffic, as certain code paths are executed enough times,.

C

They get turned into native architecture., specific binary, code, right?, when x86 windows or x86 mac or whatever specific binary code.

C

So for certain code paths,, you actually get native performance while you're running an.

C

Interpreted language, right?, and actually that plus the fact that java has a whole world view of the memory.

C

Right. you're not constantly having little bursts of memory, acquisition and destruction.

C

Because you don't have to do your own garbage collection, because java has this whole.

C

World view of the memory.

C

it can throw away,. It can clean up memory at the right time so that it doesn't cause.

C

Disruption to the work that you're doing., so java programs can actually be much faster than an equivalent c or c++ program,. Even a.

C

Well, written one, just because of the benefits that we get from using this.

C

So my my impression is: we've got this amazing just in time compiler,, this native.

C

Machinery. and I think somebody just said, hey, well,, if we've got that,, wouldn't it be.

C

Nice, if we turned it into a like what, if we just compile the whole application, into.

B

Viktor gamov: exactly why we need to have intermediate code?.

B

Why do we need to have a java byte code and why we have a gvm?.

B

If we're so smart with compilers,, why not just like take the due instead of just in time?.

B

Can we have ahead of time? speaker3: yeah, exactly.

C

And especially today, like the original core conceit of java,, which is amazing by the way,.

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The original benefit- I remember when I'm sure you remember too, in the, in the, in the.

C

Nineties, when people talked about java,, you could write systems,, not operating systems,.

C

But you could write big infrastructure, and, and software that ran across all different.

C

Operating systems,, which is amazing.

A

It is still amazing. right? that wasn't very common.

C

The fact that you can have this nice, scalable, statically typed language, that worked on.

C

All languages was great because people were developing applets and you didn't know what.

C

Browser they're going to be using or what operating system.

C

but today,. All my cloud infrastructure is linux. In a container. That's exactly almost 99%,.

A

Right?, I don't know the number,, but it's the very large majority of all infrastructure.

C

And production is linux inside of a container., so really,. While I want to run and develop on any operating system of choice,, eventually.

C

I want to make sure it runs perfectly well in linux, in a container.

C

Right. and so right. yeah. viktor gamov:, so maybe in specific, in specific version of linux, that has like a certain libraries and.

B

Where we want to be small containers to run only required stuff, because storage might be.

B

Expensive or network bandwidth to moving these images back and forth would be expensive.

C

Yeah. so- and this is where we going into the interesting situation where we still have a.

B

Container to have a linux,, but on top of linux we still need to layer. This java.

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Speaker3: and yeah,, and it's not cheap., I mean,, don't get me wrong, java is still amazingly fast at runtime and the memory.

C

Footprint is a lot more compared to some other languages,, but it's not as bad as some.

C

Other languages still., so if you're doing, if you're, comparing against sea or go or rust,.

C

Then yeah,, of course, your your c or go or program, is going to have a much smaller memory.

C

Footprint. but, you know,, try comparing it against node or python or something.

C

You'll find those things take up a lot of ram too., so the if you're, if you're, not trying to eke out all that extra ram,, then maybe you don't.

C

Care, right?, if you're not doing lambda.

C

yeah,, maybe you don't care., there's a lot of people who are just, just happy with the.

C

Existing state of affairs.- and that's great because the java, the runtime is it gets better and better for free.

C

Every six months. you know,, it's like moore's law, still exists for java developers.

C

Somehow it gets so good..

C

I mean,. If you take an application written today, and, and start it up on different.

C

Jerry. you'll see it just,, you know, it's just a night and day.

C

Different second shave, almost.

B

Viktor gamov: one of the., one of the examples that I like to bring during the maybe a couple of years.

B

Ago, during the world,, when we were in transition to java eight, java 11 and made java.

B

More container friendly., yeah. and like understand that java can understand now that it runs containers and it can.

B

Or absolutely understand that all this, the limits that containers enforcement will not.

B

Just like start grabbing now and saying, oh,, I'm dying because there's not enough.

B

Resources or whatnot or like the information that I get from my telemetry, is not equal to.

B

Reality., so in this case, it will try to figure out like,. Do I have enough memory to.

B

Start this?, I don't., so I will fall. another thing that you said, like something that you're getting for free.

B

At the things around security, for example, and how tls and support of the the better, the.

B

Version of tls and improving the encryption comes for free.

B

So people who were using the tools like I don't know, like kafka again kafka for example,.

B

And they use tls and they sell their by upgrading to new versions of java.

B

They got this improvements for free.

C

Speaker3: for free and so yeah. Thank you java team. Thank you. Oracle.

C

You know,, I know you and I are both very grateful and appreciative and obviously there's.

C

A lot of people that have, I mean,, I think it's still the number two or number one largest.

C

Community out there. right. a lot of people who have good jobs that put food on the table because oracle does this.

C

Amazing thing and they release it for us for free and open source even.

C

It's even crazier. it's so it's wonderful.

C

that said, there are still some use. Cases, like we say, that might be better served by.

C

Having native binaries, right?

C

in particular production., viktor gamov:, so serverless or., speaker3: serverless serverless is a huge use case, there, right?

C

yep. or if you had scale. so people are keen on using vm.

C

And so a couple of years, ago, back in the I guess, it's more than that now almost three.

C

Years ago, at the end of 2019,, I would say we started working on what what could we do to.

C

Make spring huge ecosystem work well in a vm native image, context.

C

And by the way, from here on down,, if I say gravy,, I'm just assume I'm talking about.

C

Native images, and not the jerry with the hotspot replacement.

C

The question was, what can we do to make it work well in a native image context or vm.

C

Context?, this is only a question because gravesham native images- don't just work.

C

They're not automatic. the problem,, and I say this with air quotes here, the problem here.

C

Is that java applications can do all sorts of amazing things that great vm native images.

C

Just can't yet. so for example, in a java application,, it's possible to type out the.

C

Definition of a class file in a java lang, string.

C

know you have a variable doubling string equals quote class.

C

My type. curly bracket. curly bracket., quote semicolon. right.. You have literally a class definition in a string..

C

You can take that string,, compile it into a class file on the disk, load. That class file.

C

Into the class loader, reflectively create a new instance with class for name and then.

C

Create the new call,, the new constructor passing the arguments.

C

You can then invoke methods on that class..

C

You can then serialize that class, if you want., if it implements realisable and you can then write that class to disk or you can create.

C

An invocation handler,, a java proxy, using that type that you just created all from that.

C

String that you started with., so you can do all of that without ever having a concrete.

C

Type. you're dealing with java lang object the entire time, right?.

C

There's no concrete type to which you can cast that resulting thing.

C

And this is all happening after the application has started. Up.

C

So the problem here is that java is a very dynamic language.

C

Sometimes we like to complain and say it feels like an old language,, but it's really very.

C

Dynamic,, just like python and javascript and ruby and all that., you can do eval, eval very easily in java.

C

It's not as easy as eval,, but I just describe things that you can all totally do within a.

C

Java program, while it's running, after it's been compiled and started.

C

And because of that, the vim approach,, the native image compiler,, what it does is it.

C

Looks at the code at compile time and tries to figure out what types are reachable.

C

That is to say what types it knows are being used by something else.

C

But it can only see the types that are reachable reachable at compile time,, which means.

C

That all this other stuff that we're doing at runtime,, like the reflection and proxies.

C

And serialization and loading resources from jars and you know, all this stuff,. It.

C

Doesn't know about it,, it doesn't understand it., and this is a big problem, because so much of the ecosystem needs this stuff.

C

It works on this stuff.. It's what makes java so dynamic and powerful, right?.

C

It's a reason: this runtime is one of the beautiful things about java.

C

And so the vm team, they're very pragmatic., they said, okay, fine,. If you give us some config files that tell us when you're going to.

C

Create proxies, when you're going to create, do reflection, when you're going to do all.

C

These things,, we will make it seem like it works well.

C

Basically, they build in a little shim into the heap of the native image, so that when you.

C

Say java lang,, when you say give me a class file and you call get declared methods, it.

C

Doesn't just return null, right?, it's a pre computed sort of reflection, api that only works for the types that you tell.

C

Them about., if there's a way,, if there's a way,, then there's definitely a will, right?.

C

So now that there's a way,, what we did was we built spring native, spring native as a.

C

Compiler framework. it's a framework that runs at compile time..

C

It knows about all the patterns that typical spring applications follow, and it knows.

B

About all the. viktor gamov: things that you just described, all the things around the reflection and how dependency.

B

Injection works in the runtime.. That's all this kind of like a nice, neat tricks needs to be documented somewhere, like in.

B

Order to compiler to understand, right?.

C

Speaker3: and so we don't want you to have to write thousands of lines of json config files to tell.

C

It about every little place. yeah,, that's part one is we can make existing standard old spring apps work on graph vm.

C

Using spring native and that's been possible for more than a year, now.

C

What just happened recently too,, which you just alluded to just a few minutes ago,, is we.

C

Released spring native zero 11,, which includes a new iot engine,, an enhanced iot engine.

C

We already had the iot engine six months a year ago., but this new part is very, very powerful..

C

This new part is we actually take your java configuration classes,, you know, your classes,.

C

Annotated with that configuration and we transform, file it into functional.

C

Configuration., so now that whole discussion of which types are reachable at runtime,,.

C

Well,, we don't have to provide the configuration..

C

We don't have to provide configuration. so that spring can reflect on these java configuration classes, because there are no.

C

Configuration classes anymore at compile, time.

C

right?. We turn it all into functional config,, which is to say we programmatically.

C

Register beans in the application context for you and that's how reachable that code is.

C

All you can command click your way, all the way through the graph and see what is.

C

Happening there. and because of that the compiled binary starts up.

C

It takes much even less ram..

C

It takes up much less time to start up.

C

It's just amazing, right? and the compile time itself has gone down. From,, let's say, about.

C

10 minutes in early 2020 to about a minute and a half now or.

C

Maybe even a minute,, depending on what you're doing. right. I've had bill to take 50 seconds,. So can I show you some of that?.

A

Okay. so let's see here.

C

I'm at start that spring the.. This is my second favorite place on the internet. obviously,. My first favorite place is production..

C

I'm going to build a new application., I'm going to use java 17., it's the technically superior version.. It's also the morally superior version..

C

You don't want your kids to find out that you're using java, eight in production.

C

The look of sadness and despair in their faces will just it'll just depress you.

C

So we've got reactive web support., we've got our two dbc or two dbc, and we've got the two dbas and we've got spring native.

C

Notice that it says experimental, because remember, vm is fairly new as well.

C

So this whole thing is just a big,. You know,, it's just all hopes and dreams at the.

C

Moment, but it does work. so here we go. wow. customers at zip, open., I'm going to open this up in my id and I'm just going to build a very trivial little http.

C

Application that talks to a sql database,, a sql database, by the way, that is fully sql.

C

99 compliant and that I'm embedding in my java, program.

C

So it's not just me connecting to another service., I'm actually starting up the database with the application itself, because you know what?.

C

Why not? we can do it., we have the technology. okay,, so I'm going to have I'm using java 17,, which means I can use nice features like.

C

Records which are I just love records, so very much.

C

And I'm going to create a spring data repository to manage,, read,, write,, update and.

C

Delete. so I'll say reactive, crud, repository,, managing instances of type customer,.

C

Primary keys of type integer. and then I want to create a http endpoint.

C

So let's say customer receipt controller and this is going to be a http controller.

C

So, as opposed to like an mvc kind of thing., so I'll use response body there and I'm just going to inject the repository to answer the.

C

Question given an hp get,, give me all the data, right?.

A

So inject that there great a constructor and we'll say a customer.

C

Find out. now this is my application,, but of course I need some sample data, and so I'm.

C

Going to go here and I'll create a new file here called schema, sql.

C

I'll say, create table. Customer id is going to be serial primary key name, var, car two,.

C

Five, five., not no good, stuff.

C

And we also want some sample data in there just to have something to look at.

C

Right. so we'll say: data sql,, I'm going to say insert into customer name values, and I want.

C

To name and we'll do a victor and julia and josh and voila, there's our data.

C

So let's go ahead and start this and see what that gives us..

C

So let's go here.. Let's just run this on the jerry okay, there we go.

C

So there's my application up and running localhost customers.

C

Voila., that's the jerry., so that's fine.. We know the application works.

C

now,. What I want to do is I'm going to turn this into a native image.

C

Now, there's I have two paths: forward., the vm support,. The spring native support has already been packaged into the application.

C

I've got the dependency,. I've got a maven profile that I can use to compile to a native.

C

Image, instead of just a regular jerry application and all the plugins have been.

C

Configured., I can also build it into a docker image,, so I have two paths: forward.

C

I can build a native image,, but I'm on a mac and that's going to be a mac native image.

C

Or I can build a docker image that has a linux binary inside of it.

C

If I wanted to build a docker image.

C

I could do maven spring boot, build hyphen image that would work just fine and that'll.

C

Create a darker image that I can then darker tag and darker push., but because it takes an extra like 40 seconds and it already takes a minute or so to, to.

C

Build this., so what I'm going to do is I'm just going to build the native image., so I'll, say: maven p native,, I'm going to skip the test because our support actually.

C

Compiles your tests into a native package, into a native binary and runs the tests in.

C

That native context as well. and that takes an extra minute or so to compile., so I'll do maven.. I'm going to use the native profile here.

C

I'm going to skip tests,, I'm going to do clean package and that's going to just do its.

C

Thing in the background. it'll take, depending on the nature of the of the workload here.

C

We're doing a zoom recording and that's going to draw precious cpu cycles that I don't.

C

Have to spare. so it'll go slower,, but it takes anywhere from a minute to a minute and a.

C

C

First, things first.: here's the resulting binary, 81 megabytes.

C

That includes everything you need to run this, so you don't need to, jerry.

C

and in fact, you don't even need, like, full of boom to you can just do like an alpine linux., a very small docker image.. So that's the application.. Let's start it.

C

63 milliseconds., so 63/1000 of a second to start. The application.

B

Viktor gamov: and think about this. there's this application.

B

let's,, let's test it on your request.

C

Speaker3: yeah.

B

Viktor gamov:, if it still has a data curl.

C

Speaker3: hp, local host, 884 customers and.

C

Viktor gamov: voila, so now we think about this. This application also includes embedded database,, sql 99.

B

Compliant includes some of the scripts that will populate this database.

B

All this thing in in one binary- and it starts in just a matter of seconds.

C

Speaker3: milliseconds, not seconds., viktor gamov:, oh yeah., speaker3: thousandths of a. viktor gamov:, second of the second.

B

So take that, like serverless. no.

C

Speaker3: yeah. and that's the other thing. look at that resident memory. Footprint.! That's the so resident memory is basically the ram that you're taking up.

C

It's not the ram, that's being paged to disk., I don't think anything's being paid to disk here. obviously,. I've got 64 gigs of ram,, so there would be no reason to., but but basically this is the amount of memory that this process of mind is taking at.

C

Runtime is 60 almost 70 megs of ram.

C

You could build a docker image that has like a,, like a linux distribution that takes ten.

C

Or 15 megabytes of ram. sorry., the size, footprint and, and the binary itself is 70 megs and it's taking 65, 70,.

C

70 megs of ram., you know,, that's amazing. and I've already worked. Recently.

C

I've been working with my betas,. I've worked with job runner, job runner.

C

I worked with, I worked on the spring retro socket project.

C

I worked on making apache lucene work with it and making a common mark, the markdown.

C

Parser. I mean, there's just all sorts of things for which, if you spend an afternoon,, you.

C

Might be able to figure out the delta between a working, jerry application and a working.

C

Spring native application., even though they're doing weird things that spring native.

C

Doesn't see out of the box world's oyster.

B

Yeah. viktor gamov:, you can also check one of the episodes of the clone builders that I did where I took the.

B

Library that I love from generating some random data., I'm not that fast typer as josh,. So that's why I like to use libraries that will generate.

B

Some fake data for me., so java faker actually also runs with spring native in one of my coding builders, where I.

B

Show you key native integration, how you can deploy your springboard application,, how it.

B

Will start just like immediately., and I also need to write a few hints, because it puts some of the resources on some.

B

Unusual places., so all this kind of like the,, the fake data that generates it comes from some yaml files.

B

And those files were missing during compilation., so you need to specify like, okay,. So that's where you need to look this and place sort.

B

Compiler ma'am or someone please include this in my application.

B

That's something that we want to have. josh,. Do we have any final thoughts or maybe like some of the resources that you want to.

B

Share with our users, what they need to check out or something if they want to learn a.

B

Little bit more or something., just like inspirational that you want to share.

C

Speaker3: yes. bring that I oh for such blog and springdale for such guides.

C

You can find me on the internet. Obviously at starbucks, man on twitter.

C

And thank you so much, victor, for everything you do..

C

I wish we could have done this together in person like we've done in so many other.

C

Countries and so many other places, and so many other times.

B

Viktor gamov:, we definitely will, because I believe there is some of the interesting topics that we want.

B

To discuss about the microservices as well., so I think it's one of the episodes where we start in the future.

B

I hope I will see you more and more..

B

That was today's episode of comcast,, where I have josh along as spring developer advocate.

B

At when we're showing some exciting news from the spring project and introduction to.

B

Spring native., I hope you were excited and entertained same way as I did.

B

I would like to say huge thanks to josh for being on the show.

B

Thank you and we will see you in the next time..

B

My name is victor gao. and, as always, have a nice.

A

Kaitlyn barnard:, thanks to everyone out there for watching.. I hope you enjoyed today's episode as much as we enjoyed recording it.

A

Make sure to hit that like button now.

B

Viktor gamov: and be sure to subscribe, so you don't miss a new episode.

A

Kaitlyn barnard:, don't forget to drop us a comment. If you have any questions for today's guests or if.

A

There's a topic you'd like to see us cover in the future.

B

Viktor gamov: and we will see you on the next episode of kongcast.