Jakarta EE JakartaOne Livestream- September 2019, 27 Apr 2020

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From YouTube: Live Coding Jakarta EE + MicroProfile | JakartaOne Livestream - September 2019

Description

Speaker: Adam Bien

Jakarta EE and MicroProfile already ship with reasonable abstractions, so you can entirely focus on solving your business problems. There are no further patterns, abstractions or indirections required. In this session I will implement a few cloud native apps from scratch and discuss naming patterns, testing strategies, maven build, dependency management approaches, monitoring, configuration, error handling, and the internal package structure.

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A

A

So hi everyone were alive again. So at this point we'll just keep this slide. That crawling up until we hit to the top of younger.

A

Okay, something happened that we didn't intend so.

A

A

Okay, let's now try it again.

A

A

So won't you start it in a couple of minutes at the top of the hour, with the atom session.

B

You are muted, I.

A

B

Now you're not now.

A

A

So we have another minute and.

A

We are expecting all the audience to be ready to go with us.

A

Okay and I'll stop sharing my screen and I will give chance to Adam to do his amazing presentation. Adam style and I want to also thank him for being our emcee for the whole event today. So, if you have questions for Adam, please go for it. He is more than eager to answer the questions. So Adam is handing it over to you perfect.

B

So it's my screen, fool. You see the slides. You.

A

See the slides and I'll maximize your screen, so both of our faces won't go minimal style, yeah.

B

Myself, it makes out right now and just because I showing you the slides, so it will be a little bit more quiet, I hope if we start coding. So regarding.

C

A clip stone there.

B

Are actually just two viable tracks right, so we are web cloud, development and cloud native and what I check out on lots of the speakers are going to attend the Eclipse con conference as well so it'll be nice to see you again so I would have a chat with ever, for instance, for sure regarding micro profile, okay,.

C

Now, back to my session.

B

A few slides I would the most important slide is probably let's say this is just ants. Is this one so on in this show I'm answering questions, usually micro profile in Jakarta equations? So if you are interested, join, is completely free and yeah, and this basically was this- were the slides of almost no slides, so I can kill that, and now I would like to code a little bit. So this junk only means I would delete the folder afterwards.

B

So this is known, so what I usually do is I would like to start a project and it's rate called the project speakers and what happened right now, I. Do it a lot? I could use, of course, the initializer from the webpage or whatever, but I like to automate everything, and what you see here is just an archetype, a very easy one and what the archetype does it.

B

It generates a project and it is not on the top because I'm using a micro profile to 0, not 3, but this is just a number and I would like to show you that, hopefully, is in the right folder, so just go jump.

B

And it is so on, and the project basically comprises Java, 8 and micro profile to 0. I will saw a little bit late with that. So, of course, I will replace that with Jakarta he even probably next week or week after. Why not it doesn't make any difference and I won't have to change it later. But the point is this: is the setup for my project? It's not like I created this for the conference. This is what I use all the time and you can probably see I always used both.

B

So let's say this is Jakarta and micro profile at the same time, and the reason is most of the runtimes suffer so most I mean open Liberty, a white fly partially. If you politic white fly with a small riot, it also supports make the profile more or less fully and clusters, of course, and payara I use a lot and tell me how to supports both. So so.

B

This is for me, district heartily small, like a really stable operating system, and the micro profile are more like and useful features which are released more often so so this combination works really well. So, okay, now we come to that and what I would like to do is to use my own tool and this tool is called what SH, and this is the most simplistic or primitive tool you can properly build.

B

The idea I got in in a JavaScript virtual, where a JavaScript attendee asked me: do you have in Java something which watches the changes in source main Java and deploys that and I say no, but it is really easy to build build. So what what? What Jesus does is. This is by the way. Why are a server? So is it a lot and we also had open Liberty, and this is a new version, even newer. What Kevin showed us and the new version is open up until 1908 and what I usually use I use everything.

B

So if I use open Liberty, what I will use in a second I use the full thing. So, for me there is no real reason to optimize, because if you come, if you, if you download just that it would behave like this, what I show you in a second so there's actually no reason just to use no micro profile or just web profile or whatever. So the one times are surprisingly small, and this is true for run times, so a payara is probably the largest or the largest means. You know it consumes about.

B

I, don't know, 60 makes idle. So it's not like it is a tick so of prac. Okay. So now this is the open, the bottom and the tool. I I taught you about ste. What and what this is just a jar where you can start and watches the changes and I would like to use the walk, because you diverse possible experience yeah. Why that, because what it does is it which is the changes and then fires up Millington East also there are no tricks, no no hot replacement or deployment or whatever.

B

So I will just launch that when what it does, it just builds my speakers project and it deploys us to all service. I have- and this is my client- this is open the bottie. This is I, think Tommy, and this is fire, as you can see, I have for K was deployed to all the service, and this for K is for K, with Java EE or Jakarta e and micro profile. Why that?

B

Because in a micro profile or Jakarta project, all the appendices we have are usually provided and they are really successful project which are doing exactly that, so they don't allow any external dependencies and, by the way, right now, I perform a code review where they are, depending on Jakarta Commons language, just to have string util, not black, for instance, so on my eyes, is not strictly necessary, the smaller the runtime, the faster deployment and the faster deployment, the battery productivity. Okay.

B

So now we have that and what I would like to do is to start Liberty. So now start Liberty and it starts the fresh Liberty. As you can see, this is the very fresh one. So I had lots of famous and see of this event, science told he the the open, Liberty or web scalability seeds. As you can see, it uses microporous 3-0, the new one and all the dependencies behind so I'm the project.

B

What is the project, so the project comprises a pink resource which is simple and superfluous comment, so like this so and as you probably should see right now, and what already recognize the change and deploy the project in two seconds and so I can absolutely use what just download the jar and Java manager and it's yeah. Okay and the message is going to be injected from from there and it could be overridden if you're running on Cuban. It is, for instance, by DC.

B

This is this: is the standard setup deployment country and the pink resource itself is not scoped, so I couldn't make it DGP or or city I mean right now, what is even not necessary and it just returns. A pink string. Beads are what we get from that is, hopefully, if it works now, a little bit nervous is for the following: local host and port is ninety eighty, because it's opelu Bertie, so it started, and then we had speakers.

B

Resources is the default and T and we have the micro profile pink, and this comes from that because we have a jacks or s configuration extends applications. We don't have to register any resources, they are automatically registered by it by all run, I'll run times, I know and the entry is resources convention of a configuration lead speakers. So there is no need for configuration by the way. I have.

C

To say that and.

B

Speaker, so what it means is the URI comprises local host speakers, resources, P, okay, so far, so good, so what we get from them. So, first of all, this is configurable, so if I will change thank enjoy, it will change here so um and I don't use that that much, but I get lots of questions how to configure Jakarta or micro profile applications. We include this in the profile. What we usually do we expect OpenShift of cuban.

B

It is to configure that so we don't ship properties what it it don't make a lot of sense to ship properties. If, if you expect, for instance, I've called config meant to to exist in your on your environment, okay, now we have that so what we could do, of course, I could add now another class and call the class a speaker and and the speaker, as probably hey.

A

And increase your font a little bit really.

B

Fun, eighteen.

A

But uh yeah I think we will all be happy perfect. Thank you.

B

So, uh namely, and it doesn't make- but let's say title of my presentation should be session, but you know we are a job. So just do that so and what I could do. I could just become the speaker here. So if I do that, it's a new speaker speaker and there's no constructor, because I forgot that so I would like to create a convenience constructor and with with them, and the speaker has a name and it's a Kevin and the talk was dummies.

B

Jakarta ad for Thomas that guy, so um it almost works. What I have to do is to tell the server hey. What is it and it's media type.

B

Jason so now the server knows it Jason. So what I? What should happen right now? So if I return, if I do this, I get the Jason so they're all dated was when Jason and what I also get, which is more interesting. I get an end point phone open, API. So what happens? It was so called swagger, swagger, schema or sway. Connotations are configured or generated for free and with this is a nice extension for mobile Liberty with that, I can even test that so I can say. I would like to try it out.

B

Execute and I will see this here. So this is a nice little feature. We use this particular at Starbucks all the times, because it is it's very productive and by the way of course, I can I can customize that so I could say API response and let's just do the description and what I see in projects is in. What somehow will do is get four returns, a speaker right. This is the enterprise way of programming and you would have today returned a speaker. So now we are Enterprise ready.

B

So, let's do that, and so what happens now is if I will wait. A second do the open, API thing open a open API, so there should be some more description. The air returns of speaker. So you can absolutely you know at your scheme our schema references and tweak that with microphone annotations. So for me, it's big deal because sometimes we are forced to generate a swagger API without obvious reasons, but some companies would like, like that, and tonight's story with that is I, don't need any external swagger dependencies.

B

So if you take a look at my war, you see it is 4k, so it's still 4k. So there was no difference in size. Okay, so now happen in the chat I. So previously you know how to get rid of ETD. So let's say I don't have to do this right now, because I just configured open, Liberty to just support micro, perfect 3 and it didn't activate in Java 8. So let's say in this particular environment.

B

What I could do I could, of course, use rely on request, scoped and transactional, which doesn't make a lot of sense here, but this this would behave somehow like eg. This is JTA, and this is request code and both are somehow similar to each of these without cooling, so cooling is still lacking, but we could introduce pulling with bulkheads, for instance, somehow behavior. So what I've just would like to have is one single annotation in future, like a Stewart type, which you know, a groups both so I, don't like to write transaction request code.

B

Every time I would like know the Jakarta. Your microphone will ship a single, convenient notation as stateless is for me. So this would be. The replacement of each of east is a little slower, not important, but on all service, because request code will will create to hold instance, trees on every request and stateless is pulled.

A

B

Everything just watch so okay, so we have that. But of course what I would like to have this, we eat a conference or Jakarta one Jakarta, one can't allow and Jakarta one catalog will return just the speakers speakers and this is Kevin and IRA. So let's do that and this pink resource injects the speaker and, oh sorry, Jakarta Wong, Jakarta, one catalog catalog, and here do this: that's it yeah Kevin what Kevin, rather than this sorry, this catalog, god speaker 3. So um this could already Bertrand see this was speakers.

B

Resources pink and Kevin Ivar, it already works so and our deployment is now 5k because of a little bit of code, but as you can see no problem at all, so now why it works. The reason for that is what I usually do is I activate a dependency injection everywhere, so I don't have to use dependent, annotations or defaults cover, whatever it just works out of the box, and so far it was passing out. So there were no optimizations needed, so we have that and what I could do right now is I could add.

B

For instance, what I mean? What would not advise in boolean in word, projects like just add, for instance, deleted annotations just for fun so and this activates the meatrix, and why would why? I don't advise to do that, because what I see in projects there's? No all methods are metered, so you get, you know millions of pots without any meaning. So what I will propose is rather have a few business-driven annotations, which say exactly what happens in the system and not just not exposed to performance level methods. But let's say this is useful.

B

Now, if, if I will switch here to my matrix matrix and then the most interesting application matrix own application, what's wrong with my matrix and we Cajun.

C

B

Work, but these are the metrics we saw before and interesting, so the metrics are available with from except application, slash Jason with with that, and they are available as the Prometheus format, which is actually a bit standardized, and this is the usual format. You know you know the ASCII written format, but someone in the chat asked before and now this is only promises. What about the other monitors? The truth is Prometheus does not matter a lot because there's open matrix specification. So what happens right now is the Prometheus output gets standardized and called open metrics.

B

So in one point of time all the other vendors are supposed to support the open, metrics, the Prometheus format, and there will be even a protocol buffer based protocol. So so what we see right now is it was started by Prometheus, but would be available to all monitoring tools so or even now, and the trick was again.

B

If you have the Jason style with the Jason style, what you get is you will be able with the Jason style, you know to very easily to access that from our web application and and parse the JSON object, because they because the Jason objects is good, easy, easy to use okay. So we have a mid-term annotation and we kind of first say you are now requesting or not so what I usually will do is, for instance, you could could request.

B

Sculpt ya require code here, and this scope is going to be the rift derived from the from the other one. So what I usually do is we have one boundary and it's fast transactions and then it it is responsible for serialization. So this jz this will be Jason specification if I mentioned earlier, and with that we don't really need videos anymore. You can just create a Java class with public at reviews and they are exposed as Jason and the Jakarta one catalog.

B

This is where I would implement a true business logic which accesses are the services of thus whatever they like. So ok. So we have the new term allocations. String stickers and what we could do right now is, for instance, another trick is I, could just throw an exception just for fun, so throw new.

A

B

A low state exception, state exception or connection problems exception for a more exciting connection, problems, exception and power outage what I really had to today morning. So there was no power, so create class, so I would create the extent exception, let's say extends runtime exception, and- and this is the message- and this would be super no power or message.

B

Okay, now this is not thrown. This can be commented out. So if I try it again and to the thing with speakers, resources and think I see, nothing and I should actually see.

B

I should actually actually see 500 and they signify founded, and you see connection problems. Power outage so am over. Liberty is nice. The recent pyre is organized, but order service will show you here. No Specter is from hell, so you know everything they can show you the whole stack trace, which is not realized. All.

C

B

C

I see in projects.

B

Is in Jakarta or Java eat projects is they invent exceptions first and they catch the exceptions here, which is actually too much it actually just personally beautiful code and Jakarta code. So what you can do very easily is just use the feature from Java email, micro profile and I could just use web application exception. Is that and here I can say response status.

B

Status, let's say 400 head up and in for message and I think build so looks good. So now what I, what I, what I created now a self met exception would civilize him itself into 400, lose additional. If or is your decision, if you need a header or not, and let's see what happens so if I will keep that, I should see perfect, so I see 400 info power outage I could even tell I don't like from it. Why not just one and just missus anticipators but could be fun so where is it?

B

I have to save it? So saving is very important, even in Jakarta world. So so doesn't work Oh planet. So now we got regenerated status. 200 will just for you and with an exception which is not usual so, but what you can also do I could say. Ok, this is nice, but let's do that and what I could do, I could say. Retry and I would like to retry 2 times.

B

3 is default and 3 times and now there's a different specifications, no more make up of a matrix rather than full tolerance and and we try. So we just will try twice and then fail. So if I will do that, then.

B

You will see here, hopefully somewhere it does so to set the dots, because you tried to retry so and now I can say string speaker with power and a speaker with power is hopefully James. G of secret person and I can say: yeah fall back and the fallback is fallback method is going to be weaker, with power and I hope, Michael.

B

So no speaker with power. So now, if I repeat that I.

B

Get James after 2d tries and he still see wanted, but not without exception, so it refight for me twice and the nice thing is wait. A second I already deployed during the session 22 times we standard the largest possible oppa, Liberty and and and my silver stealth 6k. By the way, the venue here is from a different machine.

C

B

Use what machine for screen sharing and then my other machine is pretty quiet, so I show you something incredible. The first time now I think the internet should break Felicity and have a notebook so now cool, so so what it basically means most of my micro services are tiny and I performed already a few interviews with with projects wanted. You know to reveal that truth and the and the micro services were way below 1 Meg. Why it's important? If you push that to the cloud or to private cloud, that the smaller.

C

B

Faster deployment also Java II, was stable for years and I hope after Java X stabilization Jakarta, you will also stable. So what it means is. If you have to rely on external dependencies like for instance histories, then then you don't have to migrate. You are not you're not forced to migrate your project just because I'm external dependency broke- and this is actually a very usual case in my projects, where a faculty dependency causes an trouble okay.

B

So now we had that so what we did so far, so we implemented a Jack's or service with it with a open.

A

B

Far and what's about what's about health checks, so I don't use handshakes a lot, and but what I would like to do is to show you the UN has checks. Hopefully they will work for this purpose. I would like to switch to 3-0 where the second- yes, never try that so, let's see whether it actually works and now I can say.

B

I would like to have readiness, though, so there are readiness probe and it will expand the health check and open house shank not implements where the second aim amends house checked is one of the youth specifications and don't I, don't use a lot and why I tell you in a second and this could be applications coped, and this is readiness perfectly, and what I would like to do is to say and return return.

B

Health check response, I think I can do the names exactly speaker is ready and then good done. I hope is enough. So now what happens now is if I switch to here and do the health and house readiness. Oh.

B

The health check should work for the puzzle and the cookie and arrow the problem with that. Why I'm not using this a lot is the following: if you, if you think about that, so if I just returned here, health rather than think no.

C

B

You, if I do the health and- and this is the health from the applications of a first. So if you deployed and if you deploy and lean health check, what happens then is probably, let's speaker.

C

B

The problem is, if you are, if you have to set up tripping, it is readiness probes. You would like to differentiate between the application service going to be ready or your application is going to be ready. So what we usually do is we expose our own readiness and lightness probes. It's just like a resource with two methods, and then you can use it directly from from communities. So this is Sam and I never tried it before. So, of course, it has failed, but Anna's.

B

What's what's what's new, we have readiness and lightness probe and both can can be use at the same time to add a new probe school to a JSON object. Basically so, okay I hope the application server stood or the applications to the running. So on. Let's do speakers again. Speakers resources, pink resources and pink. So now.

C

B

Still burns just the health checks do not work problem so now what about full-service? So what I can do is first I can just reinstall just for fun, hi, Anna and what it does is. This is a small script and what it does is it it just unzips until it's a payara and creates a new one, so um before I project I, do it sometimes so just do that. So now the largest possible payara is is installed and then I can say, start payara and I'm, not sure whether it supports travel ed.

B

No, not yet so I'll start I and it will start and it's already set up so that the what will deploy the application to both at the same time. So what means right now is, if I switch to what and do it again twenty-seven deployments, then I could use a payara because PI RI uses another port 1818, and this is now respond from payara. So this was 1918 was open about here.

B

This is PI era and we should get similar output, so we can use open, API and I'm just cookies about health, so open API 8080. Let's do the matrix, so the matrix you see you get the same output and with application, and this is the application matrix I wanted to show you earlier. So you see the Jakarta in Qatar speakers was involved once and you see also what's really nice is that default bags were are exposed as matrix as well. So you see how often we try it happen, which is really useful.

B

So all the micro profiles effects are, are integrated, so you don't have you know to register matrix to or fault or arrangement, so with that, and and also cou you just about a half so and it's up so this is the house trick, and this is a generic one. Not this specific one, and this is what I meant is so not the services I'm I'm, ready.

C

B

I think so there.

A

Are no reading it?

A

The question here: why do you eat green stall para? What are you trying to demo with that? Oh.

B

But this is, this is just as straight payara. So there are, you know there are no plugins nothing and the script is not for presentations. What I do it before my projects and why it's sometimes they could be a dirty cash or whatever and I know some forgotten dependencies JDBC drivers, so what I usually do is I restore all my service before my project or before my proof of concept and sometimes before the talks.

B

Even so, um I just had the script here, so I just demonstrated that so there's nothing specific with it and why I showed you this right now to show you how easy it is to install a server. So what you only have to do is all service I know you have to have to unzip them, so you just no unzipped and and after few seconds you have to hold on that, and it's actually a very good question. So for me, what's really important?

B

Is you know, time to hit a world or time to first commit so the shorter it is or the shorter the time to be productive? The more acceptance we get in projects and and what's funny is I mean some projects. Young projects were the developers and never had the attentional to learn about the old j2ee, with diploma descriptors and it's doclets and so forth, and if I show them this, they are really delighted to say this is great productive technology.

B

Now, what's the name of it and say, okay, we call it a Java EE, as I okay cool perfect. So, and this is why why I did it, but it yeah? You can just do this because you know immutable infrastructure. You.

C

Should be able to destroy.

B

Your environment and set it up again and it's a best practice in projects. What I don't like you know if it takes a lot of effort to set up the environment set up, you know whatever it should be automated. So this is the point. Okay, any other questions. Yes,.

A

Since we are starting with the questions, there is a question: if you are going to share the examples post session, it.

C

Came for sure, but they are not really valuable, but I can get of course, okay and.

A

Then there is also people are asking if you can do some comparison, comparison between torrent, a or open liberty or your opinion on other implementations. So maybe at the end of the session there at some point you can give your input. If you will yes.

B

So I'm doing right now, because those are great questions. I have to say all the application servers are great, so I would say Tommy over that in total Liberty are the smallest payara whitefly I mean you see right now, I'm just deploying right now on payara and open Liberty at the same time, and the deployments are usually in a few seconds. So the question is not what to choose. The question is what my clients already have know. If you have a it, is a record company just go with white right, you know.

B

If the company used blasters before I will rather suggest payara. Some companies were forced to go with comm cat, then probably is the perfect choice, so um I would be actually fairly open, which would run them to choose thumb. Tail I think is an end-of-life, so I wouldn't use. You know hotel or whitefly swarm in modern projects, and the reason being is because of Quercus and I wanted actually to short workbook. But I won't do this, because our session after me will show you Porco's.

B

So I was corpus, a lot so purposes the success of fantail and yeah and I prefer to use in all the stock application service and the reason is and how to call it stack overflow factor they, no more general environment. You are using the highest the chance that on arrow, you will find a solution on stack overflow, but the more your new, unique snowflake project. You are the lesser the chance that you will find a solution to your problem, cool any other questions.

B

Tanja, everyone is happy.

A

Everyone's happy Thank, You, Adam, okay,.

B

So if we have a few minutes left so what I saw in or if the PDF suggestions are suggest, we program about testing. So what I do in project is actually trivial. So I will just explain you wait for a Christian water and there is a jax-rs client and I used a client for testing, and if there are no tests and no the questions, I will show you what I mean by that. So I would use these occurs. Speakers esky and with the speaker's ASCII. This is now with 1:8.

B

Still most of my friends are using 1:8 and jax-rs that so I would use the this is a standard dependency from GlassFish or from payara and why I need that is because I'm using now I'm going to to create a system test which accesses the micro service from outside and what I would like to do is to create a David class and for that I need a dependency and the dependency injected and I would like to use the old one. So Jamie Jamie not Dean, exactly 4, that's 2 to 4.

B

So this is good enough and then I can just create new Jamie test and it's called speakers resource ID, and this was in IE Jakarta one. This is a nice package, so we have that and now what I could do I can say now in it and before and client filled new client- and this is my target and the target was: let's do the glass which localhost:8080 speakers, resources and pink.

B

It should be, of course, speakers, but I was too lazy to rename that this target under test and and this is equal target so now in.

C

B

Test and the test is a crutch. Let's call it crack for first and test. So now, I can say this request and the request needs media type, media type, Jason and I would like to have a Jason object. This is good because Jason objects for different specification, already introduced by a Ivar, and this is- and this is Jason T. So this is what was it speaker hope so and now, of course, in unit test there should be no asserts, otherwise they could break. So what he can do is this is, of course, a joke.

B

So this and now with a little bit of luck and I, would like to switch to Java 8, because I think there's some trouble with JDK 11 so and Johnson wanna stop if I run the test and was a little block, it works. So this was my test named James T Titans are cutting for dummies, so this was my test and because we are a Jakarta show, so what we can do now, I can show you not enterprise javabeans rather than enterprise Jakarta means. So what we can do for sure now I can say.

B

Instead of request, code I will use stateless and it should prefer, because now we are using each of these specification, which is another part of micro profile, and so just we run the test to save time. So we run the test and it's now with a jimmies, and so now we have one typical EGP specification. Everything else is micro profile or you know you can argue. Jax or Isis exists in both in micro profile in Jakarta and and word is my what, as you can see, the the thin war is still six caves.

B

There was no difference in size which is really good, and the department is fairly fast, so I'm worried opponent, so it was yeah. It is like 200 milliseconds or something yeah, so any questions Daniel. So we even have system tests so now why it is so valuable to have that, because with them, what you can do I could do. The following. I would like to create setup, Java project attendees and this project by the way I was already busy as IMC github.

A

There are more questions, yeah.

B

What happened was during the presentation, I said: I've already repository free, Jakarta essentials archetype, so the next session. Hopefully it was three hours ago. I will use the new Jakarta archetype instead of the Java 8 1, so the Kevin and his team were too fast. Last night or I, don't know what, when they they shipped Jakarta. So now we can ever check out the archetype. This was run soon, so.

A

Ok, go with the questions.

B

What's the question.

A

We do the questions so hold on why the application server size doesn't matter to you is the idea applicable to applications deployed on the cloud in terms of cost, particularly.

B

Applicable for the couch, what I didn't show you right now, this? Oh my god, funny! Okay! So it's the following.

B

What I told you I deploy with docker and if you consider zai, AI, X GlassFish and let's go with a hex white fly so on now? What I can do now is I'm in the speakers project? Yes, now I can go here. Go to speakers, see these speakers and do mainland clean, install, don't get built key and the name. Let's see a Jakarta speakers dot and what happened right now. It built the microservice with the entire white line.

B

So this is the cloud experience you get if you use the full application service and if I go to doctor history, Jakarta slash speakers, you will see. The reason is because of immutable layering in docker. What you can see is 20 seconds ago, I created a cloud ready. Doctor image contain a mix which is 6 K and everything else is half year-old our three years old, even because the first layer is the record operating system and the other layers is are the Java and hopefully, why try?

B

Six month ago there isn't Mac, might five Wi-Fi and what we do in the couch. We push this this layers no every three month and daily. We just have to push 6k and it means we have to push it. It happens automatically behind you seeds. So if I would say, doctor push it, we just push 6k, not everything, not 500, mix or whatever this and with for cause a similar idea, which Quercus is like a super jar.

B

But if you look inside the jar, the jar refers to already existing divers and for me, the separation between the business logic and infrastructure is crucial for cloud native code natively and recent application servers are doing this as well as even the the you know: the Cooper jars micro profile, for instance, the my my try swarm, did so-called college our approach and payara micro as well. They both supported, follow corrode meters, the jar from the application service and my war or jobs. They are separated, cool, great question. We could even try to run it D.

B

Other question.

A

Yeah, let's go for the other questions, so what is your opinion on what should be done with Jakarta EE in the future? What is the good road map for you.

B

Have the absolute power I would try to put as much as possible so all specifications or create you know a full profile with everything included and then, like, let's say the mainstream profile, whatever you call it with truth, everything because you know the the last page you have to look at the the easier it is to learn. So I will try to stressed eclis simplify everything is possible. Then, if you ask my personal opinion, I would not end for the big bank migration. So we have a clear-cut, Jakarta. Ii know new.

B

It has nothing to do with j2ee. Just just go straight. I know it would be painful, but I mean if I had the power and the time to do it and and yeah and would I am what I really like is the separation right now between the Jakarta and micro prevent of separation. They were two distinct project, because there are two distinct will be cycle to know. We get micro profile four times a year, which is really exciting and I would expect jakarta ii to move a little bit slower. I didn't expect.

B

You know to shift for releases of Jakarta a year, so yeah, okay,.

A

Thank you. Let's move on with other questions. What is the current state of Quercus? Is it production-ready? Does it support all the features that open Liberty or some other MP implementation like a profile implementations, do.

B

Corpus cannot be and I think never will the micro profile fully compliant and the reason is because core Coast is built for optimizations and Quercus is not very good. With reflection.

B

Having said that, we already successfully ported some Java EE and micro prophet projects to Coco's without any major issues. So what will be different because it aims to compilation to a native library which is tiny so with workers you can you can compile you know the micro profile into into a tech, go like library, so, as and recently in a project wait. Surely you sleeping purpose of the web service of shift one finally corpus jar of jar. It was binary file which, which contained the static files, for instance.

B

So and, and is it production ready, I, would say and not redhead, but for my for my observations is the hot spot version. Yes and the girl the end version I will test a little bit more because it's very new.

A

Ok, so there is a need for clarification when you say Wi-Fi, do you mean tortilla now, Wi-Fi I mean.

B

What I use here is the white line. Full image I always use the largest available service, so whitefly 70-foot payara fool, oppa liberty. I use the largest available open liberty. So what I don't know that is today is no I. Oh I think.

B

What I downloaded is all J features, so this is a diversion you see right now, so I never used micro or swarm and I the other. Ok.

A

There's also question and I think you already touched on it. What do you think about torn tail are comparing to other implementations, fountain.

C

Is end-of-life zone.

C

A

Would you recommend migrating the business object from ejbs to CDI no.

B

Because it would only recommend that, if it should be is duplicated will die right now, it's fine and on common application servers right now. The jeebies are faster than a CDI, even except corpus or four, because Corker generates lots of bytecode at Build time and application servers are working, goes reflection and if you really have to migrate that it will be kind easy, so you will have to replace it. Stateless with a request go from transactional or your own stereotypes. There's not a big deal.

A

If I have a default micro profile, config file with my local configuration and then for my different environment, set up the variables well, the environment variable override the file values exactly.

B

This is the beauty of micro profile conflict. So what we really do is the following, so we I have to make up of a config here, and this is going to be overridden by environment entries. So it means system get n, so the operating system, environment, variables and you can override that with system properties. So we used for testing, for instance, so we can override the environment entries with system properties, because it's easier to test.

A

Ok, I'll keep going don't.

C

B

I would like to do is to create here a class called speaker, speaker access door and this peak accessed on it's basically my test, and this is the whole thing there is me why I write system tests with Jack's response. So if I do this and.

B

Before there is no before in what we have post construct- and this is not necessary at all- so we can say this returns, a JSON object and this returns to speak M.

B

So they're in pink resource, what I could do I can just inject the a speaker access or access. Oh, this is not needed and then say access or dodge for hours exactly and to speak, to shrink and plus just from another service.

B

So I know with a little bit of luck. It could work. So I will just launch what here and this should deploy the application to all service as well. So if I go now to localhost, localhost 8080.

B

Attendees resources and pink.

B

Looks good but it does work so uh a second attendees.

B

Resources pink and 1980.

B

So something wrong with pink resource a pink resource. This looks good, so we have speakers resources feed this bracket, so you can just try that again.

B

So this rest, so this is good. We have attendees resources, pink cat, sprinting accessor to scream from other service. Interestingly, so have to work and should work and I'll just do it request code.

B

It's not necessary, but the reinitialize itself and.

B

2080 also, that's not what's a pity all service, so I did actually.

C

B

Speaker, speaker speakers.

B

It should work, it would work, but it doesn't so. This is the funny speakers. What wait a second? No one tells me that I'm in the wrong in the front, folder so I have to start it here.

B

So now it should be better now it works. So no one told me this I, just try to ship or I forgot to deploy the service in Jakarta in micro profile is very important that you never forget to deploy these services, but what.

C

You see right now the.

B

Service attendees communicate to the service speakers and what I was able to do the copy and paste we use the entire the entire unit test for system tests and in on honest CI, CD pipeline. This is what happens. Usually, we have a dedicated module which accesses the micro service from outside exactly and what to make it a little bit more useful. What I could do right now, I could actually say: I would like to inject I think it is registry type and.

B

Application and metric registry- hopefully yes, registry, so what I could do right now is just rewrite it a bit. So let's do this. I can just read that and what I would like to do is to show you my business metric and now I would say: read entity and Jason object, so just rewrite it a bit and then say: registry.

B

Counter and the name is speakers underscore plus.

B

Speaker get status, you see where I'm going with that in so and with a little bit of luck.

B

Let's do this and now watch that so I go here and do matrix, matrix, slash application, and what you can see is that I created that I counter on the fly where I had two hundred three times, so what it does is. It creates counters on the fly with all my HTTP status codes and the number of invocations.

B

So this is actually a very useful technique to create dynamic matrix, and this is a far more useful that just put you know, meter on it and hope that someone is interested in know how fast the method was and by the way this method could be, could be annotated with bowed heads and whatever give a shot earlier with bowed, heads or or the other notations time out and so forth. Any other questions.

B

What I hope I do I will push the code yeah thanks. So my this is kids.com Adam being an X and then being an ax should be empty, and if it isn't, it would be empty in a second and I will push the code here.

B

Okay, so thank you and enjoy Jakarta it together with micro profile, okay,.

A

So we're just a few mates short of the next session and I will. Thank you for the questions for the questions that weren't answered. We will get to them a little bit later. Adam. Thank you so very much and thank you for M, seeing the whole event, so everyone you will have the opportunity to ask questions to Adam throughout the day and at this point, I will ask you to move on to the next session. Yes,.

B

See you there use the speaker right.

A