So, you wrote your Quarkus application, and now you want to deploy it to a Kubernetes cluster. Good news: Deploying a Quarkus application to a Kubernetes cluster is easy. Before you do this, though, you need to straighten out your application’s properties. After all, your app probably has to connect with a database, call other services, and so on. These settings are already defined in your application.properties file, but the values match the ones for your local environment and won’t work once deployed onto your cluster.

So, how do you easily solve this problem? Let’s walk through an example.

Create the example Quarkus application

Instead of using a complex example, let’s take a simple use case that explains the concept well. Start by creating a new Quarkus app:

$ mvn io.quarkus:quarkus-maven-plugin:1.1.1.Final:create

You can keep all of the default values while creating the new application. In this example, the application is named hello-app. Now, open the HelloResource.java file and refactor it to look like this:

@Path("/hello") public class HelloResource { @ConfigProperty(name = "greeting.message") String message; @GET @Produces(MediaType.TEXT_PLAIN) public String hello() { return "hello " + message; } } 

In your application.properties file, now add greeting.message=localhost. The @ConfigProperty annotation is not in the scope of this article, but here we can see how easy it is to inject properties inside our code using this annotation.

Now, let’s start our application to see if it works as expected:

$ mvn compile quarkus:dev

Browse to http://localhost:8080/hello, which should output hello localhost. That’s it for the Quarkus app. It’s ready to go.

Deploy the application to the Kubernetes cluster

The idea here is to deploy this application to our Kubernetes cluster and replace the value of our greeting property with one that will work on the cluster. It is important to know here that all of the properties from application.properties are exposed, and thus can be overridden with environment variables. The convention is to convert the name of the property to uppercase and replace every dot (.) with an underscore (_). So, for instance, our greeting.message will become GREETING_MESSAGE.

At this point, we are almost ready to deploy our app to Kubernetes, but we need to do three more things:

1. Create a Docker image of your application and push it to a repository that your cluster can access.
2. Define a ConfgMap resource.
3. Generate the Kubernetes resources for our application.

To create the Docker image, simply execute this command:

$ docker build -f src/main/docker/Dockerfile.jvm -t quarkus/hello-app .

Be sure to set the right Docker username and to also push to an image registry, like docker-hub or quay. If you are not able to push an image, you can use sebi2706/hello-app:latest.

Next, create the file config-hello.yml:

apiVersion: v1 data: greeting: "Kubernetes" kind: ConfigMap metadata: name: hello-config 

Make sure that you are connected to a cluster and apply this file:

$ kubectl apply -f config-hello.yml

Quarkus comes with a useful extension, quarkus-kubernetes, that generates the Kubernetes resources for you. You can even tweak the generated resources by providing extra properties—for more details, check out this guide.

After installing the extension, add these properties to our application.properties file so it generates extra configuration arguments for our containers specification:

kubernetes.group=yourDockerUsername kubernetes.env-vars[0].name=GREETING_MESSAGE kubernetes.env-vars[0].value=greeting kubernetes.env-vars[0].configmap=hello-config

Run mvn package and view the generated resources in target/kubernetes. The interesting part is in spec.containers.env:

- name: "GREETING_MESSAGE"   valueFrom:   configMapKeyRef:     key: "greeting"    name: "hello-config"

Here, we see how to pass an environment variable to our container with a value coming from a ConfigMap. Now, simply apply the resources:

$ kubectl apply -f target/kubernetes/kubernetes.yml

Expose your service:

kubectl expose deployment hello --type=NodePort

Then, browse to the public URL or do a curl. For instance, with Minikube:

$ curl $(minikube service hello-app --url)/hello

This command should output: hello Kubernetes.

Conclusion

Now you know how to use a ConfigMap in combination with environment variables and your Quarkus’s application.properties. As we said in the introduction, this technique is particularly useful when defining a DB connection’s URL (like QUARKUS_DATASOURCE_URL) or when using the quarkus-rest-client (ORG_SEBI_OTHERSERVICE_MP_REST_URL).

The post Using Kubernetes ConfigMaps to define your Quarkus application’s properties appeared first on Red Hat Developer.

Launching on Nintendo Switch later this week is Pixboy, a retro-inspired platformer that’s sure to flood you with lovely ’90s-based nostalgia.

With a limited colour palette, groovy chiptune music and plenty of platforming to beat, Pixboy really is giving us the retro vibes in the trailer above. The game features 40 levels with nearly 30 different enemies to contend with, as well as four powerful bosses that stand between you and your goal.

The game’s world has more than 150 secret rooms to find, and you’ll also need to be on the lookout for special coins that can be swapped for new theme colours resembling your favourite retro consoles like the Game Boy.

We don’t have pricing for the game at the time of writing, but we do know that’s planned to launch on Switch this Thursday, 11th June.

Will you give this one a go if the price is right? Tell us below.

To intersect multiple sets, stored in a list l, use the Python one-liner l.pop().intersection(*l) that takes the first set from the list, calls the intersection() method on it, and passes the remaining sets as arguments by unpacking them from the list.

A set is a unique collection of unordered elements. The intersection operation creates a new set that consists of the elements that exist in all sets.

So, let’s dive into the formal problem formulation, shall we?

Problem: Given a list or a collection of sets. How to join those sets using the intersection operation?

Example: You’ve got a list of sets [{1, 2, 3}, {1, 4}, {2, 3, 5}] and you want to calculate the intersection {1}.

Solution: To intersect a list of sets, use the following strategy:

• Get the first element from the list as a starting point. This assumes the list has at least one element.
• Call the intersection() method on the first set object.
• Pass all sets as arguments into the intersection() method by unpacking the list with the asterisk operator *list.
• The result of the intersection() method is a new set containing all elements that are in all of the sets.

Code: Here’s the one-liner code that intersects a collection of sets.

# Create the list of sets

lst = [{1, 2, 3}, {1, 4}, {1, 2, 3}] # One-Liner to intersect a list of sets

print(lst[0].intersection(*lst))

The output of this code is the intersection of the three sets {1, 2, 3}, {1, 4}, and {2, 3, 5}. Only one element appears in all three sets:

{1}

If you love Python one-liners, check out my new book “Python One-Liners” (Amazon Link) that teaches you a thorough understanding of all single lines of Python code.

Try it yourself: Here’s the code in an interactive code shell that runs it in your browser:

Exercise: Change the code to calculate the union of the sets in the list!

Related video: A similar problem is to perform the union operation on a list of sets. In the following video, you can watch me explain how to union multiple sets in Python:

Where to Go From Here?

Enough theory, let’s get some practice!

To become successful in coding, you need to get out there and solve real problems for real people. That’s how you can become a six-figure earner easily. And that’s how you polish the skills you really need in practice. After all, what’s the use of learning theory that nobody ever needs?

Practice projects is how you sharpen your saw in coding!

Do you want to become a code master by focusing on practical code projects that actually earn you money and solve problems for people?

Then become a Python freelance developer! It’s the best way of approaching the task of improving your Python skills—even if you are a complete beginner.

Join my free webinar “How to Build Your High-Income Skill Python” and watch how I grew my coding business online and how you can, too—from the comfort of your own home.

Join the free webinar now!

Please join us in celebrating our creative and talented community with these limited edition collectible products. Each artist receives a revenue share of sales from their product design. The program is currently by invite only and we plan on adding more designs throughout the year.

My name is Jen Whaley. Online I’m known as Jennwhale! While I have experience working in various styles, my main focus is line-work; using both digital and traditional mediums. Bungie has wonderful artists that create incredibly gorgeous experiences that I love to celebrate with my own art. I love the Moon, Dreadnaught, and all things Hive! Creating fan art to spread the joy of Destiny was the goal, but in return, I got much more: a loving community and acknowledgment from the company who originally created the beautiful game I draw fan art for!

Drawing has always been my favorite hobby! Around five years ago, I discovered Prismacolor Premier Pencils, they are amazing at blending and I love working with them!

I really enjoy drawing characters and space, as I am super into astronomy. My style tries to reflect realism and I often choose to include gold in my artwork! Destiny is a huge source of inspiration for me as it is so aesthetically pleasing – I see it as an interactive masterpiece. Last year I graduated university with a Bachelor of Arts in Game Development. I am now a full-time freelance artist, pursuing a career in concept/illustration!

Hi! I’m Nathaniel and I started creating art at a young age with the work of the late Quinton Hoover (RIP) being my biggest inspiration. I love mixing genres and creating customized art from existing properties while trying not to illustrate what’s already been done. It’s both a fun challenge and my way of getting lost.

I love how Destiny combines styles from different cultures – I’m looking forward to an Oceanic theme! Making art is an extension of what I enjoy in Destiny and as long as there are good stories and characters, I’ll keep making art that the community can hopefully enjoy!

This latest Beta brings those playing closer to what you would see and expect on the Java Edition of Minecraft.  Overall a lot of fixes are the main focus on this beta.  If you find more please be sure to report them to Mojang Studios!

Remember that only those on Xbox One / Windows 10 / and Android may participate in the Beta builds.  You will not be able to join Realms or non-beta players worlds and you will not be able to open worlds opened in the Beta in earlier/current stable builds of Bedrock.

Crashes and Stability

• Fixed several crashes that could occur during gameplay
• Fixed a crash when auto crafting 64 honey blocks from recipe book in survival MCPE-68604
• Fixed an issue that could occur if the player equipped any piece of netherite armor, used a clear command to clear it, and then equipped another piece of netherite armor of the same type
• Fixed a crash that could happen when a mob’s state changed
• Fixed navigation.walk to handle the case where it is used on a flying entity, so that the flying entity will not cause lag while it is touching the ground

General

• Updated Mojang Studios loading screens
• Nether biome distribution now better matches that in Minecraft: Java Edition
• Fixed issue where players on Xbox One may have errors accessing the Marketplace
• Improved reliability of loading characters MCPE-55968
• Fixed an instance where a character can be lost when offline
• Fixed an issue that prevented achievements from being unlocked offline after reconnecting
• Fix issue of incorrect player hand animations when using fishing rod in third person MCPE-63088
• Fixed the Xbox main menu getting stuck forever after cancelling the sync popup box MCPE-53266
• Secondary players in a splitscreen game will now animate properly when you look at them
• Suspending and resuming the game will no longer make a player’s model disappear MCPE-63119
• The second player’s hands in a split screen game will no longer disappear when you look at them with the first player MCPE-58806
• Nether Bricks texture has been updated
• Chiseled Netherbrick and Quartz Bricks textures are updated
• Crimson Trap Door is now called Crimson Trapdoor
• Warped Forest are now more rare compared to other Nether biomes
• When players enter Warped Forest, the previous music track now plays until it’s finished
• Bedrock Credits have been updated
• Fixed issue where experimental mode was not being enabled for clients when the server level has it enabled
• Optimised sound loading – “load_on_low_memory” is now deprecated in sound_definitions.json, as all audio can now play on low memory devices
• Fixed a world conversion issue that was causing some items in chunks to convert to Bedrock incorrectly

Gameplay

• Dyeing shulker boxes no longer causes items to vanish MCPE-64164
• Fixed incorrect spawn position when set on top of a pressure plate MCPE-65487
• Fixed issue where taking Arrows, Fireworks, or Nautilus shells into the offhand will break the offhand UI slot MCPE-64227
• Fixed an issue where lava would drop uncooked food MCPE-74767
• Added fallback to world spawn if the Respawn Anchor spawn is obstructed
• “You home bed was missing or obstructed” message shows again
• “Respawn point set” message is now displayed for the Respawn Anchor in all cases MCPE-73159
• Respawn Anchors can be charged without setting respawn point and without exploding outside the Nether MCPE-69044
• The Respawn Anchor can now have blocks placed against if it contains no charge
• Villagers will now harvest crops regardless of what crop amounts they have in their inventory MCPE-67694
• XP orbs shoot in random directions once again MCPE-58715
• It’s now impossible to use beds if there is no room for the player to stand next to or on top of the bed when they wake up MCPE-42881
• It’s now impossible to interact with Piglins who are admiring golden items MCPE-69861
• Respawn anchors no longer destroy blocks when detonated underwater
• Respawn Anchor now plays an appropriate sound when it depletes MCPE-69265
• Lodestone Compass is now supported in commands  MCPE-68994
• Barrier blocks no longer generate in Bastion Remnants
• Chests in Bastion Remnants now always generate with loot  MCPE-69003
• Mobs no longer consume one of two Swords of the same material dropped in the same place
• Fixed Smithing table sound not playing while being used  MCPE-69066
• Respawn Anchor charging sound no longer plays in Basalt Delta biome  MCPE-69189
• Lodestone and compass now play an appropriate sound
• Twisting Vines Block is now called Twisting Vines
• ‘Oooh, shiny!’ achievement now unlock when distracting a Piglin with a Gold Ingot by right-clicking
• Twisting Vines and Weeping Vines are now destroyed, and popped as items, immediately when flooded
• Mined Nether Sprouts no longer produce an invalid item that could not be used MCPE-74339
• Moving blocks now have the correct collision box MCPE-62419
• Fire now properly converts to Soul Fire on Soul Sand and Soul Soil when Fire ticking is turned off  MCPE-69823
• Campfires can now be crafted with charcoal MCPE-70862
• Using Quartz Block in a stonecutter now produces Quartz Slabs instead of Smooth Quartz slabs MCPE-57925
• Dispenser now uses 1 glowstone when filling Respawn Anchor  MCPE-72686
• Silk touch enchant now works on Respawn Anchor
• Silk touch enchant and setBlock command now works on Crimson button, Warped button, Crimson hyphae, Stripped crimson hyphae, Warped hyphae, Stripped warped hyphae, Weeping vines, Twisting vines, Blackstone pressure plate, Polished blackstone button
• Chains can now be pushed by Pistons without breaking
• Soul Torches can now also be crafted with charcoal MCPE-70585
• Warped Fungus on a Stick can now be enchanted similar to Carrot on a Stick MCPE-70948
• Striders now take falling damage MCPE-70886
• Baby Strider sitting on an adult Strider now freeze when its parent is on land MCPE-71413
• Striders movement speed has been adjusted to closer match Minecraft Java Edition
• Netherite items will not catch fire because they are fire resistant
• Large Basalt Columns can no longer be over 10 blocks tall
• Basalt Deltas now have the correct blocks generating in the biome
• Blackstone Buttons, Pressure Plates, Slabs and Walls now have the right appearance on Maps
• Respawn Anchor can now only be mined by Diamond or Netherite Pickaxe MCPE-72102
• Mobs now prefer Stone Sword over Gold Sword (except for Piglins!)
• Twisting Vines and Weeping Vines now emit correct sounds when broken
• Chain now plays correct sound when placed
• Lodestone now requires a Pickaxe to be mined
• Many doors had their texture updated
• Warped Stem and Crimson Stem now have the same mining time as Oak Log
• Warped Planks or Crimson Plank slabs no longer appear as default in recipes for some items
• Player no longer spawns on a block after relaunching the world while falling
• Fixed an issue that could cause the player to respawn underwater
• Netherite shovel can now be used to extinguish campfires MCPE-65730
• Soul soul can be mined more quickly with shovels now MCPE-65382
• Crimson and Warped Hyphae (including stripped) can now be crafted into planks in Bedrock MCPE-73099
• Weeping Vines can now be grown using bone meal with dispensers MCPE-65660

Mobs

• Fixed an issue where chickens on slabs wouldn’t take damage from lava MCPE-74990
• Hoglins should now always be pacified after fleeing from Warped Fungus
• Mobs can now pathfind on Soul Sand blocks
• Piglins can now outrun Hoglins
• Hoglins will retaliate against crossbow wielding Piglins less frequently
• Villagers no longer drop items they pick up
• Using Pickblock on Zoglin now gives Zoglin spawn egg
• Netherite helmet now renders properly on Piglins
• Hoglins and Zoglins are now more resistant to knockback
• Piglins now make a retreating sound while fleeing from Soul Fire Torches, Soul Fire Lanterns and Soul Fire
• Piglins and Hoglins behavior while fleeing has been improved
• Zoglin and Zombified Piglin no longer drown in lava
• Changed many mobs’ behavior while drowning in lava
• Aggravated Piglins no longer barter
• Gold Ingot now always properly render in Piglins hand during bartering
• Mobs should no longer consume items they pick up
• Piglin now become angry when Trapped Chests are destroyed
• Hoglins no longer flee from Zoglins
• The Zombified Piglin texture has been updated
• Mobs that can equip helmet armor can now also equip Turtle Shell
• Fixed an issue where tamed pets would occasionally disappear after transferring to or from the nether
• Angry Bees are now slower MCPE-53689

Blocks

• Iron Bars and Glass Panes now connect to Walls MCPE-73989
• Hyphae blocks can now be crafted into their respective planks MCPE-73099
• Moving blocks now have the correct collision box  MCPE-62419

Graphical

• Fixed low light emitting block items not matching the placed blocks brightness
• Fixed mobs in mob spawners not being visible MCPE-56879
• Maps in item frames no longer have lines through them MCPE-46154
• Fixed maps missing textures after reloading world MCPE-54228
• Fixed issue where lighting wasn’t refreshed when going through portals back into overworld MCPE-338144
• Fixed the excessive hand bob motion caused by playing an animation on the hand and camera together MCPE-54072
• Items held by mobs should now render correctly
• Lodestone Compass now renders properly in the inventory

User Interface

• Tweaked Server Tab navigation
• Creative Recipe Books show item groupings again
• Added a background to title and subtitle text with adjustable opacity Opacity can be changed in the “Accessibility” tab in the Settings menu
• Added a background to the actionbar text used in the /title command The same background is also applied to the item text above the hotbar
• Smithing Table UI has been updated

Commands

• Fixed a bug where bees and other new mobs were missing a non-“minecraft:” version for /summon commands. You should be able to spawn vanilla mobs without it! MCPE-58557
• Added new overload for /replaceitem with an option for destroy (the old behavior) or keep (the command will return an error if an item occupies that slot)
• Fixed issue where the clear command would not clear damaged tools
• /setblock command fails on the new blocks if attempted with non-default state MCPE-65395
• /setblock command now works for more block states

Add-Ons and Scripting

• Fixed knockback issue that stopped crates in “Rescue Mission Lava Town” Marketplace pack from moving when hit
• Added a new loop mode to animations: now instead of omitting “loop” to have it stop playing when finished, or setting “loop”: true to have it loop when finished, you can now say “loop”: “hold_on_last_frame” to keep applying the last frame of animation
• A content error will now show up if a Range json node is defined as an array with a single value
• A content error will now show up if you use more than one Move Control Component, Jump Control Component, or Navigation Component
• Functions with a mix of invalid and valid commands will only execute the valid ones with command version 1.15 and below In these cases, the function name will not show up in the auto-suggestion list but can still be executed if typed out
• Starting on 1.16, functions with any invalid commands (for example incorrect selector syntax) will no longer register and cannot be called
• When setting the json variables “attack_interval_min” and “attack_interval_max”, the component will now correctly throw a content error if the max is less than the min MCPE-63542
• Fixed issue where sounds would sometimes have incorrect settings applied to them leading to 2D sounds to play as 3D and vice versa
• Fixed issue that was cutting off playing sound incorrectly, though can still easily occur if audio is loaded up that takes up a lot of memory
• Comments in JSON arrays no longer cause an error MCPE-40873

Update (Mon 8th Jun, 2020 15:30 BST): Team17’s run ‘n’ gun roguelike Neon Abyss has now received a solid release date for Nintendo Switch and other platforms. Confirmed in the new trailer above, the game is set to launch on 14th July.

You can find more details on this one in our original article below.

Original Article (Mon 30th Mar, 2020 14:00 BST): Team17 and Veewo Games have revealed that Neon Abyss, a fast-paced action-platformer previously announced for Steam, will also come to Nintendo Switch this year.

The game has players fighting their way through procedurally generated dungeons, tasked by Hades with dispatching the New Gods in a “colourful and fast-paced blend of run ‘n’ gun gameplay and roguelite mechanics”.

We have a list of key features for you if you’d like to know more, as well as a brand new trailer which you should have hopefully spotted already above.

Key Features:
– Roguelite: Death is not the end. When players die, they come back more powerful than before, lasting longer with each incarnation
– Pets: Hatch and evolve pets along your journey to give you additional firepower and perks
– Unlimited item synergies: Random item drops throughout the levels will give players the chance to stack passive effects to devastating effect, and with an almost limitless number of combinations, every run will be unique
– Mini-games: In-between slaying gods, mini-games such as piano performances, meditation challenges, dance competitions and more will give players the chance to not only kick back and relax for a second, but provide extra loot too

If you’re keen, a time-limited demo is currently available on Steam – interestingly, the harder the difficulty you select, the longer the demo lets you play.

Liking the look of this one? Let us know if you’ll be adding Neon Abyss to your Switch wishlist with a comment below.