Sunday, October 15, 2017

Θυμάμαι...

Χάζευα κάτι στο twitter, σχετικό με agile, scrum και λοιπές μεθοδολογίες και θεωρίες. Θυμήθηκα πριν πολλά χρόνια, στην Ελλάδα σε μια εταιρία που δούλευα, ειχα βρεθεί κάτι σαν lead μιας μικρή ομάδας για ένα project, τότε ήταν οι εποχές του agile manifesto, και του scrum all the things.

Τα διάβαζα τότε στο internet και έλεγα , κοίτα ρε φίλε φοβερά πράγματα. Μιας και είχα αυτή την ελευθερία, λέω παιδιά απο αύριο να πειραματιστούμε να κάνουμε μερικά από όσα έλεγε το scrum guide ή το agile manifesto, να πειραματιστούμε ρε παίδι μου, να κάνουμε και daily scrum ή stand-up έτσι informal.

Και το κάναμε 1-2 φορές και μετά σταματήσαμε. Θα μου πεις φυσικά ρε φίλε αφού δεν είχατε την κατάλληλη εκπαιδευση, διαβάσατε εκεί σαν βλαχαδερά 5 άρθρα και νομίζατε ότι θα το κάνετε. Για κάποιο καιρό το είχα πιστέψει, και έλεγα να πάω να κάνω official training δεν μπορεί να είμαστε έτσι πρόχεροι. Να γίνουμε scrum master. Γιατί πάντα έχω αυτό το ενοχικό μέσα μου, μήπως δεν το έκανα σωστά...

Μετα τα χρόνια πέρασαν και τώρα γελάω. Γελάω και με αυτά που πίστευα, γιατί μετά από εμάς ήρθα οι 'expert' να μας διδάξουν ή να εφαρμόσουν agile, και απέτυχαν. Φυσικά γιατί δεν υπάρχει κανένα λόγος να έχεις μεθολογία όταν έχεις προ-συμφωνήσει με τον πελάτη functionality με το κιλό - με την ώρα και με έναν στρατό από micro-managers δίπλα σου (ΓΕΙΑ ΣΟΥ ΚΛΑΣΙΚΕ ΕΛΛΗΝΑ ΜΑΝΑΤΖΕΡ).

Για να μην αναθεματίζω βέβαια την μικρή και ανώριμη ελληνική αγορά εξάλλου τόσα χρόνια εκεί έβγαζα το ψωμί μου, και τώρα σε πιο οργανωμένες εταιρίες έξω, γελάω ακόμα με όλες αυτές τις μεθοδολογίες που τελικά στην καλύτερη των περιπτώσεων θα βρεθείς να δουλεύεις με έξυπνους ανθρώπους που έχουν πιάσει το νόημα και θα σου πουν `κοιτα μεγάλε τα μισά είναι απλά να έχουμε να λέμε, θα οργανωθούμε έτσι απλά και πρακτικά θα εφαρμόσουμε όσα πραγματικά εχουν να προσφέρουν και να λύσουν προβλήματα και τα άλλα θα τα ξεχάσουμε`. Στην χερότερη ή μάλλον συνήθως θα βρεθείς να δουλεύεις με παπαγάλους ή πλασιέ του συστήματος που δεν εχουν την παραμικρή ιδεά για το πως θα φτάσουν από το σημείο Α στο σημείο Β. Θα σέρνουν εσένα και την ομάδα σου σε μια ατέρμονη γραφειοκρατία που διαλύει την παραγωγικότητα και δεν βοηθάει σε τίποτα.

Το μόνο που μετράει τελικά και ίσως μεγάλωσα για να το καταλάβω είναι πως φτάσεις από το σημείο Α στο Β και συνήθως αυτό το λένε 'get shit done' όλα τα άλλα είναι .... απλά θεωρίες. 



Sunday, September 10, 2017

Μια non politically correct απόψη για το 'Adults in the room' του Γ.Βαρουφάκη


Στο γυρισμό από τις διακοπές μας στην Ελλάδα, αγόρασα στο αεροδρόμιο το πιο πρόσφατο βιβλίο του Γ.Φαρουφάκη με τίτλο 'Adults in the room'. Δεν θα το κρύψω, το αγόρασα από νεύρο, ίσως μια παράξενη, άρρωστη ανάγκη να διαβάσω με λεπτομέρειες όλα έζησα κι εγώ μαζί με τους υπόλοιπους Έλληνες εκείνη την περίοδο. Ίσως ο όρος έζησα να είναι μην τόσο σωστός, μάλλον πρέπει να γράψω,  όλα όσα έπραττε η τότε κυβέρνηση ΣΥΡΙΖΑ και εμείς ως πολίτες είχαμε μια κάποια ενημέρωση από τα Μ.Μ.Ε και φυσικά τα λουστήκαμε στην πορεία.

Disclaimer: (για σου γλιτώσω χρόνο και μην ανεβάσεις πίεση χωρίς λόγο). Θεωρώ την κυβέρνηση ΣΥΡΙΖΑ την χειρότερη των τελευταίων δεκαετιών, τόσο για τα αποτελέσματα της ως κυβέρνηση αλλά πιο πολύ για την ποιότητα και το επίπεδo των στελεχών κυβερνώντων, με πρώτο και καλύτερο των πρωθυπουργό. Μια αστεία φιγούρα που εν έτη 2017 δεν μπορεί ακόμα να μιλήσει Αγγλικά. Λυπάμαι πολύ που αρκετός κόσμος που ξέρω στιγμιαία πίστεψε όλα τα αλλοπρόσαλλα που έταζε η κυβέρνηση αυτή και λυπάμαι πιο πολύ που ακόμα υπάρχουν συμπατριώτες μου που τους υποστηρίζουν.

Μου πήρε 2 πήγαινε έλα στην Ελλάδα για να το ολοκληρώσω, εκμεταλλευόμενος τις 3ωρες πτήσεις. Μετανάστης πια, πήγαινε έλα στην Ελλάδα, στο αεροπλάνο τι καλύτερο απ' το να διαβάζεις τι έγινε όσο ήσουν στην Ελλάδα λίγο πριν πάρεις την βαλίτσα σου και αποχαιρετήσεις. Δεν ήταν το πρώτο βιβλίο του Γ. Φαρουφάκη που διαβάζω, άρα δεν μου είναι άγνωστος, ούτε και οι απόψεις του περί παγκόσμιας οικονομίας ή περί του ευρώ-μηχανισμού. Θα τολμήσω να πω ότι 'θεωρητικά' βρίσκω κάποιες θέσεις του εύστοχες και ρεαλιστικές.

Το βιβλίο μου άρεσε, ταπεινή μου άποψη μου είναι ότι, τα πράγματα έγιναν ακριβώς όπως τα γράφει, με άλλα λόγια τον πιστεύω. Νομίζω ότι και η εξέλιξη των πραγμάτων έδειξε ότι δεν υπήρξαν πολλές ενστάσεις για την εξιστόρηση των γεγονότων αλλά και των πραγματικών διαλόγων. Έπιασα τον εαυτό μου 2-3 φορές να γελάει με αυτά που διάβαζε και μετά να αναρωτιέμαι αν τελικά έπρεπε να γελάω η να κλαίω για όλα εκείνα μετά από τα γεγονότα που διάβαζα εκείνη την στιγμή.

Για να μην σε κουράσω αυτά που μου έκαναν εντύπωση.
  1. Είναι φανερό ότι ο Βαρουφάκης ήταν ο πιο 'γνωστικός' και μάλλον ο μόνος άνθρωπος με κάποιο επίπεδο σε σχέση με τους αριστερούς κατα- φαντασία,  ΠΑΣΟΚΟΥΣ ..τρίτου επιπέδου, και μισότρελους  του ΣΥΡΙΖΑ.
  2. Δεν μπόρεσα να καταλάβω πως αφού δείχνει σημάδια λογικής, δεν μπορούσε να καταλάβει ότι όλα όσα πρότεινε για παράλληλα συστήματα και πίεση προς τους Ευρωπαίους ήταν 100% άτοπα εκείνη την περίοδο. Με άλλα λόγια, οι τακτικές και ιδέες που είχε θα μπορούσαν ίσως να χρησιμοποιηθούν την περίοδο (με το ανάλογο ρίσκο φυσικά) που ο Γ.Παπανδρέου υπέγραψε το πρώτο μνημόνιο - και όχι μετά από 2. Άρα καταλαβαίνω ότι δεν μπορούσε να αντιληφθεί την ωμή και δύσκολη πολιτική και οικονομική θέση της χώρας. Ή για να το πω πιο απλά, το παιχνίδι είχε ήδη χαθεί για την χώρα μας γιατί έμπλεξε;
  3. Δεν μπορώ να κατανοήσω αν ήταν ενθουσιασμός, αθωότητα ή απλά βλακεία αυτό το αίσθημα που κατέβαλε τον ίδιο και πολλούς ΄ήρωες' του βιβλιου, περί εθνική υποχρέωσης, να σώσουμε την χώρα, αυτός ο πατριωτισμός. Θα ομολογήσω από μια persona σαν τον Βαρουφάκη ως αναγνώστης θα το πίστευα (με καλή διάθεση) αλλά για πολλούς πολιτικάντηδες ήρωες του, με έκανε να γελάω! Μουρμούριζα καθώς διάβαζα, ' ρε αυτοί οι..μ..κες το είχαν πιστέψει ότι  ήταν εθνοσωτήρες'...ποιοι αυτοί!   
  4. Στα πρώτα κεφάλαια γράφει σε ένα σημείο, ότι η αρχική του ιδέα ήταν να πολιτευτεί με το Ποτάμι. Θεωρώ ότι έπρεπε να μείνει σε αυτή την αρχική πρόθεση, η ιστορία έδειξε ότι έγινε ένα εξιλαστήριο θύμα ενός πολύ κακού επιπέδου πολιτικού θιάσου.
  5. Σχεδόν - πήγα να πετάξω βιβλίο, στην σελίδα 457 αν δεν κάνω λάθος. Ο τρόπος που ο Βαρουφάκης μιλάει για τον πρωθυπουργό είναι ανεξήγητος ακόμα και όταν τον έχει αδειάσει πολλές φορές. Σε εκείνο το σημείο χάνει μεγάλο ποσοστό από την σχετική κατανόηση που έδειχνα στον ίδιο! Μουρμούρισα ' μα δεν μπορεί να είσαι τόσο τυφλός ή είσαι μ..ας!' Σαν εκείνες τις στιγμές που η γιαγιά στο χωριό βλέπει την αγαπημένη της σαπουνόπερα και μιλάει στους ηθοποιούς σαν παρατηρητής, 'μην τον πιστεύεις κόρη μου σε απατάει με την Τζίνα, μην το κάνεις παιδί μου'.
  6. Θεωρώ ότι ο Βαρουφάκης και ο θίασος την τωρινής κυβέρνησης ήταν ένας ο χειρότερος συνδυασμός, το χειρότερο κοκτέιλ ανθρώπων που έμελε να διαχειριστούν μια από τις πολλές κρίσεις την σύγχρονης ιστορίας -και μαζί απέτυχαν παταγωδώς. 
  7. Νομίζω ότι απλά εκμεταλλεύτηκαν, τον όποιο ενθουσιασμό του και πραγματική θέληση του να βοηθήσει ακόμα και αν ο ίδιος δεν είχε αντιληφθεί το πολιτικό τοπίο. Αυτό ήταν και το μεγαλύτερο του λάθος - δεν είχε αντίληψη της κατάστασης.
  8. Το βιβλίο τελειώνει ...λίγους μήνες πριν αποφασίσουμε να φύγουμε από την Ελλάδα και τώρα με λύπη  διαβάζω σε πτήσεις πέρα δώθε, αλλά και ανακούφιση ότι πια δεν με ακουμπούν (τόσο), επιλογές και αποφάσεις αυτού το θιάσου.
Αξίζει να το διαβάσει κανείς το βιβλίο; Θα τολμήσω να πω ΝΑΙ! Μάλιστα προτείνω  σε όσους το διαβάσουν και μένουν ακόμα στην Ελλάδα, να το πάρουν μαζί τους όταν θα ξαναμπούν στο παραβάν των εκλογών όταν και όποτε γίνουν!







Sunday, June 25, 2017

my day to day Kubernetes command line tools & apps #kubernetes

The other day, I was chatting with my friend Stathis about command line tools that I use every day, extra to kubectl, operating on different kube clusters in production.

 

Command line tools

 

1. kubetail
Allows you to tail logs from one or more pods simultaneously. It is really handy since you only have to specify the pod name, and then it will automatically tail all the different instances you may have already deployed.

kubetail backend-api -n aNamespace

2. kubectx
If you do have access to more than one Kubernetes clusters (like me) then switching from one cluster to the other, especially when you do it very often, can be a bit boring or error prone. Kubectx, will actually parse your 'kube_config` and it will help you make the switch faster.

kubectx
kubectx kube1_uk_prod
kubectx kube1_us_prod
kubectx -> lists all the available contexts

3. kubens
It is on the same bundle as kubectx and helps you switch easily through different namespaces that you may have within a cluster

kubens
kubens prod_uk
kubeks qa_us


Apps

 

1. kube-state-metrics
Kubernetes already uses `heapster` to gather stats and info about the state of the cluster, which is later fed to some of kubernetes components like autoscalers, to determine if the they need to initiate a pod up or down scale. Kube-state-metrics is an addition to what `heapster` provides, and it actually exposes additional (prometheus) metrics that can prove very handy if you are operating kube clusters in production. What I really like, is that once you spin the pod (one would suffice) then you can extract the provided metrics, through its Prometheus Endpoint. So if you are already using prometheus to scrape metrics from you deployments, kube-state-metrics is ready for business. You can check the various metrics provided by the app here.

 

Deployment

 

1. Helm
This needs a separate blog post most probably, but I have slowly started moving away from vanilla kubernetes deployment descriptors and 80% of my deployments are now, packaged and configured as Helm charts. The main reason adopting helm was our need, to parameterize the deplooyments, and relying on bash based hacks (sed, or envsubst) was ok to start, but as soon as the number of deployments grew along with their complexity, the parameterization of all of them was really pain. I will come back with a separate post for sure about Helm and why I think is vey good idea, to start adopting it as soon as possible.

Saturday, May 20, 2017

Voxxed Days - Athens 2017 - short review #vdathens



Yesterday I had the pleasure to attend the very first Voxxed Days Athens. As I have written 6 months ago while attending Voxxed Days Thesalloniki, this was the day I've waiting for too many years, a  proper conference, with top class speakers on the main IT hub of Greece, Athens. Once again, congrats to Patroklos Papapetrou and the team around Voxxed Athens, at least for me they made a dream come true!

There is a always a catch for me, when I do attend conferences in Greece. Since I am away now, I don't get to see or get in touch with old colleagues and friends from the very first days of the Java Hellenic Use Group.  So when I am back and I get to see lots of them at once, I kind of spend most of time socializing rather than attending all the talks. This is exactly what happened, but I am very very happy, I got to see so many familiar faces, talk about past jobs, laugh about it , talk about our current state either abroad or in Greece and last but not least debate around the prospects of our country which continues it's spiral into economic recession.

Definitely things like VoxxedAthens, validate the the small IT sector in Greece, is still alive so there is hope. Of course many other things need to change until we can conclude that we have a shift on a better course. 

I am very pleased to see, that our small user group, (JHUG) is more active than ever, Markos, Thomas and Kostis are doing a great job and JHUG managed to organize 6 meetups within a year, this is crazy compared to the past. It seems that Greek companies  are nowadays more open to the idea of a ' meetup', they do indeed  want to attract talent (or whatever talent is left behind, since lots of people are now out of the country). I hope this support to dev communities to continue and get stronger rather than being an one off side effect of companies just trying to recruit for a certain period of time. A strong software development market, needs active and vibrant communities, software companies in the local market need to embrace on a regular base all them. Software developers are like flowers, the more incentives, opportunities or support you provide them, the more they grow and  they become better, they add skills and in the end they contribute to the business cause of the company they work for .

If you are really looking for a detailed review of most of the talks, (meaning more specifics, please head here and here . Markos and Spyros  provide a very comprehensive review of the event.

The venue was nice, but I do hope next year for a more tech talk friendly place. The rooms were large but the projector and screens a bit small to actually see the slides or the code presented from the back. Also lot's of noice occasionally from overlapping talks & people coming in and out. Latetly I have been addicted to the Devoxx way ,which means I expect that all the conferences will be on cinemas, where I can sit confortably, enjoy a huge screen where I can see the code and slides.

I am not going to go through the talks I attended, since I managed to save time for 4 of them. My 2 favorite though were :
  • You can do better with Kotlin
    • I am currently half way on reading 'Kotlin in Action' and I was really happen that I had the chance to meet and talk with one of co-authors, Svetlana Isakova. I am very positive towards Kotlin and i will continue to investigate way on eventually adopting or mixing it with Java, in any of my personal projects or maybe at work.
  • Taming the Dragon: Conquering non blocking code with RxJava
    RxJava is coming, through Java9, through Spring Reactive or other Reactor based frameworks. I really enjoyed this talk by Frank Lyarru. We need to make sure that we get our heads around the new concepts since I bet they will become mainstream soon enough.
Overall I am very happy, we need to support Voxxed Athens, and make sure it becomes a place we meet once every year!

Back to London :) after getting some sun and enjoying some nice cold freddo espresso!

Saturday, May 13, 2017

Some sort of confusion? Or uncessary noise ...on my Kotlin journey



Lately I try to level up my skills with Kotlin, mostly from the view point of a JVM backend developer. 

I really feel very motivated and enthusiastic, I think the language has the right balance to make me feel like home (I am a hardcore Java developer after all) but at the same time give me new skills. 

As I've said many times, when I first tried to Kotlin I thought it was like Java from the Future, with idioms or syntactic sugar of Java libraries like Lombok & Javaslang (vavr) etc.

Part of the learning process is to  to engage with the community, so I've already attended one Kotlin meetup, or try to talk with people that have adopted Kotlin in production.

There is one thing that frustrates me thought. I don't understand this kind of hate towards Java, more or less not justified, with statements like 'If you use Lombok you are not doing Java'. I am really confused what is happening here.

So I kind of reply, 'so if you use Lombok or if you use Spring, or any framework that does byte code manipulation or byte code infusion is not Java? '

Yes typically we have Java the language, as a set of keywords and principles but the actual internals of the JVM and the way you can leverage bytecode through the use of Java or any other language (Kotlin generates bytecode after all) is part of the game. If you are an application developer, you use libraries that provide more or less some kind of abstraction.

I consider myself a pragmatic application  (business) developer. I don't want to re-invent the wheel when I want to implement something simple, and in business software (more or less what the majority of people do) you don't want to do that. 

When I rely or use any framework, or any language, I should be aware of what I am using and what are the pros & cons of using. You should be aware on what Lombok is doing / generating for you behind the scenes, or how Spring or Hibernate, or EJB implementations, enhance your your POJO's so that get  for example transactional or  other context awareness. This is not something we don't know and suddenly we want to jump out of the ship because someone revealed a secret.

Is this 'dynamic' nature of these libraries not the right thing for you? You don't like the fact that all these libraries leverage the bytecode and mechanics of the JVM? This is just fine, and in some cases yes you better re-invent the wheel or do your custom thing.

But please people lets all relax a bit, and stop stating things that eventually don't add anything to the picture. Everyone has an opinion towards different programming languages and I respect that but at least when we want to push forward for a new thing, lets focus on all the nice things that are offered rather than doing completely unrelated bashing on stuff that I consider technicalities.

If you ask me, I am really excited with Kotlin, but I still enjoy Java8, and Lombok , javaslang, Spring Boot, JBoss Weld, Guava  or Wildfly Swarm, or LogBack, or AsyncHttpClient etc etc.

It is always better when you show case the power of Kotlin rather than talking about how Java sucks, which in many cases yes Java does not do well compared to other stuff, but is not that is the worst language on earth or its so outdated. When you try to sell something new- focus on it's strengths and less on the weaknesses of the thing that wants to replace!



DevoxxUK 2017 - day2 #devoxxuk #devoxx

With one day delay here is my second day review of Devoxx UK 2017.


  • Front End for Back End developers, Matt Raible
    •  I personally don't fancy front-end development mostly because of my dislike towards JavaScript, but I do like to stay in touch with the technology trends, understand the basics of the frameworks. Most of the time eventually all the API and backend systems that I help develop, have to power a Single Page Application or some sort of JS front-end. On this talk M.Raible went through the current trends on Javascript / Frameworks, tooling for front-end developers and ways for a back-end minded dev to start coding on the other side. Not bad at all. 
  • The diabolical developer's guide to performance tuning, Martijn Verburg
    •  I could not miss a talk from Martijn, by far one of my favorite conference speakers of all time. Very nice and pragmatic presentation regarding performance tuning and the mind set behind discovering or tackling such problems.
      • Some worth taking notes like 'Every developer should spend some time and learn about the underlying hardware that powers his application'
      • Don't try to outsmart javac neither the JIT compiler, most of the times they are smarter than you, and will produce or inline code better than your attempts on the source code. 
      • Code first for maintainability and simplicity, then measure..and then you can code for performance (if you have such problems)
      • Try JITWatch
  • Real world Java 9, Trisha Gee
    • Always enjoy the java talks of Trisha Gee, she went through live coding and upgrading an older project she has showed off in previous conferences and talks to Java9. You can find here a full blog post with the slide and the code for her talk. What I will keep from this talk is that currently adopting Java9 on production code is not a walk in the path, especially if you want to fully adopt Java modules. I am not saying that is rocket science but I am really confused by small things like, source code layout that needs to change (by the way WHY PEOPLE!!!! i still remember the days of Ant where every developer kind of imposed his own structure), or repackaging or restructuring of existing code bases. Jigsaw aside, the talk featured some other hot features of Java9, like the introduction of ReactiveStreams aka Flow API.
  • An introduction to Kotlin by Example
    • Another Kotlin related talk which i really enjoyed. As I have previously elaborated Kotlin has a place in my developer heart and I try to learn it in my spare time and think of ways that I could use it in some of my projects. Very nice talk.
      • Slides of the talk and the examples can be found here
      • I really liked the 99 problems with Kotlin challenge. Try some of the examples even if your solution is not 100% aligned with the author, because you did not leverage recursion or tail recursion, its a nice way to get used of the Kotlin standard API. 
Overall it was a great, conference. I am really looking forward to the next one. My conference time is not over though, next week I am flying back to my home country Greece to attend Voxxed Athens. I am very proud to be member of the program committee. So see you in Athens next week , of course related blog posts will follow. 

Thursday, May 11, 2017

DevoxxUK 2017 - day1- 10 years of JavaPolis / Devoxx for me #devoxxuk #devoxx

So, Devoxx Uk 2017. For me its  a 10 year anniversary for one of the best European and now global developer conferences. I still remember my first 2007 Javapolis at Antwrep, its the conference I got to meet and get in touch with the broader Java community and people like Stephan J. The conference that I managed to meet the father of Java and many other Java Rock stars. The conference that I got to meet my wife (yes true story!)- a java developer as well :). So today as a Java family, living in London, we attended Devoxx UK 2017 for the very first time.

First of all you can judge the quality of the conference, from the amount of t-shirts and gadgets you managed to collect by your first day. As you can see, Devoxx UK was a great success : ) .

The event takes place at the Design Business center in Angel , we got so lucky because we live just around the corner so it was an easy morning walk. Really impressive place, even though, I still prefer the cinema's. Some of the rooms (not all of them) were not sound proofed and in some cases when you are seating in the back you could not see the speaker. Also if you are used to cinema like chairs and auditoriums going back to conventional conference centers feels a bit weird. But anyway it was not that bad, maybe we are just spoiled by Devoxx :). I hope Devoxx-UK grows more and then they can 'rent' cinema rooms next year : ).

Talks 
  •  Opening KeyNote - Constructing a practical quantum computer
    • Impressive stuff, but at some point I got lost, maybe not so easy to or too early to full grasp the magic of quantum physics.  
  • Opening KeyNote- Video games: The quest for smart dumbness 
  • Opening Keynote - Ask the Architect
    • A short session with M. Reihnold, defending project Jigsaw. I have made my mind about Jigsaw and I kind of agree with the emerged skepticism and arguments from the community, which has materialized to the infamous EC down vote. I did not get any extra points from the session apart from what we already know from both sides.
  • Reactive Spring - by Josh Long
    • Well I admit I am more into Spring lately, not completely sold but I do follow some stuff that I consider nice. This was a typical code Spring :allthethings: session by J.Long. I am interested on the upcoming Spring Web Functions- programming model + the RxJava Spring abstractions that are coming over. 
  • Serveless, not so FaaS!
    •  Interesting talk about the current state of the serveless movement and the available offerings. Personally i am not sold on the overall idea. I still consider the whole ecosystem and the solutions are a nice to have for ad hoc or nice to have or dont care functionality. Maybe I am wrong. The talk gave some nice points on what you can and can not do if you consider going 'serveless'. I still don't understand the term - its just someone spinning containers that spin other containers containers..for you.
  • A Pragmatist's Guide to functional Geekery
    •  Really enjoyed this one. A Scala developer showing functional programming idioms in Java using one of my favorite libraries JavaSlang (aka vavr.io). I really like vavr, and i do try to use as much as I can (or learn to use it). At the same time I do try to keep a balance especially in older code bases that are not functional at all, not ending up with hybrid - ugly procedural-O.O and some functions in the mix code. Something that makes me sad. The examples from the talk can be found here. Very nice worth checking out.
  •  Microservices for the Masses with Spring Boot, JHipster, and JWT
    • I really like M.Raible his talk was around Spring and JHipster. I am amazed on how much this project has evolved. I mean seriously now it even spits kubernetes deployment descriptors! I am not a huge fan of the Spring Cloud initiative that was also featured during the work- mostly the Okta architecture, but the latest JHipster, seems powerful enough to do the scaffolding for you as long as you like the core techs behind it, Spring +Angular 4.
  • Gang of Four Patterns 
    • Huge fun of Mario Fusco. One of the best Java Twitter accounts and great speaker - with the right amount of black humor. Mario went through the behavioral design patterns from the GoF book, and re-implemented then using functional programming paradigms. You can find the code here.
  •  The case for Kotlin & Ceylon
    • I think that was my favorite talk of the day. Russel Winder is a very charismatic speaker with lots of experience on his shoulder and lots of strong opinions - which infuses lots of energy to his talks. I happen to invest in my free time in Kotlin (this must be a separate blog post). I was kind of tired with Scala, tried a couple of times and I still consider it unnecessarily complex for my taste of needs, at the same time I was feeling that Java is cool but it is not the answer to everything. So while searching and trying other stuff, I got a small push - like yes try it you will really like it from my ex-manager and great colleague at Ticketmaster (thanks Joel) which I trust a lot on his tech views. It was a love at first code, in the beginning I felt that I am coding in some sort of Java with Lombok and Javaslang - of course the more you go through the lang the more you discover new and interesting stuff. I am still learning but Kotlin is in my heart now and I can easily find my self in the future coding Java and Kotlin in parallel / professionally!
That's all for today!!! Greetings from London : ) .