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Six things we learned
implementing
Rockstar on Quarkus
Hanno Embregts
Holly Cummins
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@holly_cummins @hannotify #RedHat #InfoSupport
Wanted: Rockstar developer
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@holly_cummins @hannotify #RedHat #InfoSupport
Wanted: Rockstar developer
Rockstar developer for PHP,
Bootstrap, HTML 5, CS3
Hello Everyone, We’re looking for a world-class
developer to join up with our growing team, located
across the world. We are growing fast in terms of
revenue and projects, and need some help with
development chops to take and run with things. About
Us - We’re just a big ol’ smorgasbord of fun. We have
a variety of client and in-house projects / companies
that mostly run in the 6 to 7
fi
gure per year range, so
you’ll always be working on something new, exciting,
and mostly in spaces that are making a meaningful
di
ff
erence in the world. Top Notch Ability to Figure
Stu
ff
Out Above all else, you’ll need to be a problem
solver. I don’t expect you to be a master at everything,
but you will need to be able to
fi
gure out how to do
something you don’t know how.
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@holly_cummins @hannotify #RedHat #InfoSupport
Wanted: Rockstar developer
Are you a rockstar developer?
Are you an experienced developer looking for a new challenge and an opportunity to advance your skills and
career in a great working environment?
If you are an ambitious, self-starter able to thrive in a startup environment, we have the perfect job for you!
We are looking for a competent programmer with PHP expertise who will be our
fi
rst in-house technology
expert and play an integral role in setting the company’s overall development strategy.
You will work directly under the founding team and will act as both a technology expert and consultant, making
decisions that will impact the current and future state of our product.
The perfect candidate will be familiar with PHP, Laravel, SQL, CSS, and have a general understanding of
martech solutions.
Who you are
• By nature, a friendly, helpful human being
• Must be comfortable with working in an existing code base
• Able to read and understand existing code
• Able to use good judgment when evaluating trade-o
ff
s between speed, quality, and cost
• Able to debug and work backwards through code
• Speaks and writes clearly and articulately
• Must be end-user centric
• Has a knack for thinking and developing in a future-proof manner
• This is a full-time position
Rockstar developer for PHP,
Bootstrap, HTML 5, CS3
Hello Everyone, We’re looking for a world-class
developer to join up with our growing team, located
across the world. We are growing fast in terms of
revenue and projects, and need some help with
development chops to take and run with things. About
Us - We’re just a big ol’ smorgasbord of fun. We have
a variety of client and in-house projects / companies
that mostly run in the 6 to 7
fi
gure per year range, so
you’ll always be working on something new, exciting,
and mostly in spaces that are making a meaningful
di
ff
erence in the world. Top Notch Ability to Figure
Stu
ff
Out Above all else, you’ll need to be a problem
solver. I don’t expect you to be a master at everything,
but you will need to be able to
fi
gure out how to do
something you don’t know how.
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@holly_cummins @hannotify #RedHat #InfoSupport
Wanted: Rockstar developer
Are you a rockstar developer?
Are you an experienced developer looking for a new challenge and an opportunity to advance your skills and
career in a great working environment?
If you are an ambitious, self-starter able to thrive in a startup environment, we have the perfect job for you!
We are looking for a competent programmer with PHP expertise who will be our
fi
rst in-house technology
expert and play an integral role in setting the company’s overall development strategy.
You will work directly under the founding team and will act as both a technology expert and consultant, making
decisions that will impact the current and future state of our product.
The perfect candidate will be familiar with PHP, Laravel, SQL, CSS, and have a general understanding of
martech solutions.
Who you are
• By nature, a friendly, helpful human being
• Must be comfortable with working in an existing code base
• Able to read and understand existing code
• Able to use good judgment when evaluating trade-o
ff
s between speed, quality, and cost
• Able to debug and work backwards through code
• Speaks and writes clearly and articulately
• Must be end-user centric
• Has a knack for thinking and developing in a future-proof manner
• This is a full-time position
Rockstar developer for PHP,
Bootstrap, HTML 5, CS3
Hello Everyone, We’re looking for a world-class
developer to join up with our growing team, located
across the world. We are growing fast in terms of
revenue and projects, and need some help with
development chops to take and run with things. About
Us - We’re just a big ol’ smorgasbord of fun. We have
a variety of client and in-house projects / companies
that mostly run in the 6 to 7
fi
gure per year range, so
you’ll always be working on something new, exciting,
and mostly in spaces that are making a meaningful
di
ff
erence in the world. Top Notch Ability to Figure
Stu
ff
Out Above all else, you’ll need to be a problem
solver. I don’t expect you to be a master at everything,
but you will need to be able to
fi
gure out how to do
something you don’t know how.
Hiring: Rockstar developer
We are looking for a rockstar developer to join us, starting towards the
end of this month (Jul 2023).
We are a software startup, and currently taking on agency-type work,
building websites and web applications for other companies. We also
have several products / services that we want to build. The developer
will start out by helping with some of the client work, and then based
on performance, may get to work on a product.
We work primarily with Python, Django, DRF, Javascript, HTML, CSS,
React, NextJS, Celery, Postgres, Redis, AWS, Git, Github, and more.
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@holly_cummins @hannotify #RedHat #InfoSupport
Wanted: Rockstar developer
Are you a rockstar developer?
Are you an experienced developer looking for a new challenge and an opportunity to advance your skills and
career in a great working environment?
If you are an ambitious, self-starter able to thrive in a startup environment, we have the perfect job for you!
We are looking for a competent programmer with PHP expertise who will be our
fi
rst in-house technology
expert and play an integral role in setting the company’s overall development strategy.
You will work directly under the founding team and will act as both a technology expert and consultant, making
decisions that will impact the current and future state of our product.
The perfect candidate will be familiar with PHP, Laravel, SQL, CSS, and have a general understanding of
martech solutions.
Who you are
• By nature, a friendly, helpful human being
• Must be comfortable with working in an existing code base
• Able to read and understand existing code
• Able to use good judgment when evaluating trade-o
ff
s between speed, quality, and cost
• Able to debug and work backwards through code
• Speaks and writes clearly and articulately
• Must be end-user centric
• Has a knack for thinking and developing in a future-proof manner
• This is a full-time position
Rockstar developer for PHP,
Bootstrap, HTML 5, CS3
Hello Everyone, We’re looking for a world-class
developer to join up with our growing team, located
across the world. We are growing fast in terms of
revenue and projects, and need some help with
development chops to take and run with things. About
Us - We’re just a big ol’ smorgasbord of fun. We have
a variety of client and in-house projects / companies
that mostly run in the 6 to 7
fi
gure per year range, so
you’ll always be working on something new, exciting,
and mostly in spaces that are making a meaningful
di
ff
erence in the world. Top Notch Ability to Figure
Stu
ff
Out Above all else, you’ll need to be a problem
solver. I don’t expect you to be a master at everything,
but you will need to be able to
fi
gure out how to do
something you don’t know how.
Hiring: Rockstar developer
We are looking for a rockstar developer to join us, starting towards the
end of this month (Jul 2023).
We are a software startup, and currently taking on agency-type work,
building websites and web applications for other companies. We also
have several products / services that we want to build. The developer
will start out by helping with some of the client work, and then based
on performance, may get to work on a product.
We work primarily with Python, Django, DRF, Javascript, HTML, CSS,
React, NextJS, Celery, Postgres, Redis, AWS, Git, Github, and more.
Looking for a rockstar developer
I'm looking for a rockstar developer to join me, starting maybe
towards the end of this month (Jul 2023).
I run a software startup, and currently we're taking on agency-
type work, building websites and web applications for other
companies. I also have several products / services that I want
to build. The developer will be working with me personally,
and will start out by helping me with some of the client work.
We work primarily with Python, Django, DRF, Javascript,
HTML, CSS, React, NextJS, Celery, Postgres, Redis, AWS,
Git, Github, and more.
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@holly_cummins @hannotify #RedHat #InfoSupport
Wanted: Rockstar developer
Are you a rockstar developer?
Are you an experienced developer looking for a new challenge and an opportunity to advance your skills and
career in a great working environment?
If you are an ambitious, self-starter able to thrive in a startup environment, we have the perfect job for you!
We are looking for a competent programmer with PHP expertise who will be our
fi
rst in-house technology
expert and play an integral role in setting the company’s overall development strategy.
You will work directly under the founding team and will act as both a technology expert and consultant, making
decisions that will impact the current and future state of our product.
The perfect candidate will be familiar with PHP, Laravel, SQL, CSS, and have a general understanding of
martech solutions.
Who you are
• By nature, a friendly, helpful human being
• Must be comfortable with working in an existing code base
• Able to read and understand existing code
• Able to use good judgment when evaluating trade-o
ff
s between speed, quality, and cost
• Able to debug and work backwards through code
• Speaks and writes clearly and articulately
• Must be end-user centric
• Has a knack for thinking and developing in a future-proof manner
• This is a full-time position
Rockstar developer for PHP,
Bootstrap, HTML 5, CS3
Hello Everyone, We’re looking for a world-class
developer to join up with our growing team, located
across the world. We are growing fast in terms of
revenue and projects, and need some help with
development chops to take and run with things. About
Us - We’re just a big ol’ smorgasbord of fun. We have
a variety of client and in-house projects / companies
that mostly run in the 6 to 7
fi
gure per year range, so
you’ll always be working on something new, exciting,
and mostly in spaces that are making a meaningful
di
ff
erence in the world. Top Notch Ability to Figure
Stu
ff
Out Above all else, you’ll need to be a problem
solver. I don’t expect you to be a master at everything,
but you will need to be able to
fi
gure out how to do
something you don’t know how.
Hiring: Rockstar developer
We are looking for a rockstar developer to join us, starting towards the
end of this month (Jul 2023).
We are a software startup, and currently taking on agency-type work,
building websites and web applications for other companies. We also
have several products / services that we want to build. The developer
will start out by helping with some of the client work, and then based
on performance, may get to work on a product.
We work primarily with Python, Django, DRF, Javascript, HTML, CSS,
React, NextJS, Celery, Postgres, Redis, AWS, Git, Github, and more.
Looking for a rockstar developer
I'm looking for a rockstar developer to join me, starting maybe
towards the end of this month (Jul 2023).
I run a software startup, and currently we're taking on agency-
type work, building websites and web applications for other
companies. I also have several products / services that I want
to build. The developer will be working with me personally,
and will start out by helping me with some of the client work.
We work primarily with Python, Django, DRF, Javascript,
HTML, CSS, React, NextJS, Celery, Postgres, Redis, AWS,
Git, Github, and more.
Wanted: A rockstar developer for [redacted]
Agencies often have a hard time competing with private-sector
employers for top-notch IT talent, but this job might hold special
appeal for the open-data crowd: The [redacted] team is hiring its
own developer. This "IT specialist (applications software)" will join
the small crew of dataphiles in the [redacted] department, where he
or she will serve as an in-house software engineer, collaborate with
outside developers, and serve as web architect for [redacted]. The
technical underpinnings of [redacted], which launched in May 2009,
have been largely built by contractors, but [redacted] has now
decided to bring some coding capacity onto the permanent sta
ff
.
Details of the job are posted on [redacted]. But would-be applicants
had better hurry -- the application window closes on June 11.
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
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the creation story
of Rockstar
Images: DALL-E
Dylan Beattie
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the creation story
of Rockstar
Images: DALL-E
Wouldn’t it be fun
to write a spec for a
language called
Rockstar?
Dylan Beattie
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the creation story
of Rockstar
Images: DALL-E
I have beer, so I
now see the language
should work like this,
and …
Wouldn’t it be fun
to write a spec for a
language called
Rockstar?
Dylan Beattie
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the creation story
of Rockstar
Images: DALL-E
I have beer, so I
now see the language
should work like this,
and …
Wouldn’t it be fun
to write a spec for a
language called
Rockstar?
Dylan Beattie
in Australia
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the creation story
of Rockstar
Images: DALL-E
I have beer, so I
now see the language
should work like this,
and …
Wouldn’t it be fun
to write a spec for a
language called
Rockstar?
Dylan Beattie
in Australia
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No content
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Developers turn coffee into code …
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Developers turn coffee into code …
and beer into ridiculous language specs.
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@holly_cummins @hannotify #RedHat #InfoSupport
Thanks to Dylan,
you can become a
certified rockstar developer
Image: Dylan Beattie
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@holly_cummins @hannotify #RedHat #InfoSupport
Rockstar is an “esoteric language”
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@holly_cummins @hannotify #RedHat #InfoSupport
Brainfuck
++++++++++[>+++++++>+++++++++
+>+++<<<-]>++.>+.+++++++
..+++.>++.<<++++++++++++++
+.>.+++.------.--------.>+.
Hello World:
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@holly_cummins @hannotify #RedHat #InfoSupport
Chicken
chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken
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chicken chicken
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chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken
chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken
chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken
chicken chicken chicken
chicken chicken chicken chicken chicken chicken chicken chicken
chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken chicken
chicken chicken chicken chicken chicken chicken
Hello World:
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@holly_cummins @hannotify #RedHat #InfoSupport
Existing Rockstar implementations
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@holly_cummins @hannotify #RedHat #InfoSupport
Existing Rockstar implementations
Satriani (interpreter written in JavaScript, and the official reference implementation)
Rocky (interpreter written in Java)
RockstarJava (interpreter written in Java)
KaiserRuby (transpiler written in Ruby)
Maiden (interpreter written in Rust)
…and many more in different languages
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
None of these are JVM languages.
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@holly_cummins @hannotify #RedHat #InfoSupport
None of these are JVM languages.
This is obviously a terrible gap.
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@holly_cummins @hannotify #RedHat #InfoSupport
Why did we need another implementation?
Because we could.
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@holly_cummins @hannotify #RedHat #InfoSupport
Developers love reinventing things.
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@holly_cummins @hannotify #RedHat #InfoSupport
What shall we call it?
Naming things is the hardest problem in computer science.
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
1. The Brew Fighters (The Foo Fighters)
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
1. The Brew Fighters (The Foo Fighters)
2. Cream Roasters (Cream)
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
1. The Brew Fighters (The Foo Fighters)
2. Cream Roasters (Cream)
3. Java Leppard (Def Leppard)
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
1. The Brew Fighters (The Foo Fighters)
2. Cream Roasters (Cream)
3. Java Leppard (Def Leppard)
4. Guns 'N' Coffees (Guns N' Roses)
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
1. The Brew Fighters (The Foo Fighters)
2. Cream Roasters (Cream)
3. Java Leppard (Def Leppard)
4. Guns 'N' Coffees (Guns N' Roses)
5. Black Sabbath Blend (Black Sabbath)
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
1. The Brew Fighters (The Foo Fighters)
2. Cream Roasters (Cream)
3. Java Leppard (Def Leppard)
4. Guns 'N' Coffees (Guns N' Roses)
5. Black Sabbath Blend (Black Sabbath)
6. The Mocha Crüe (Mötley Crüe)
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
1. The Brew Fighters (The Foo Fighters)
2. Cream Roasters (Cream)
3. Java Leppard (Def Leppard)
4. Guns 'N' Coffees (Guns N' Roses)
5. Black Sabbath Blend (Black Sabbath)
6. The Mocha Crüe (Mötley Crüe)
7. Van Halentino (Van Halen)
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
1. The Brew Fighters (The Foo Fighters)
2. Cream Roasters (Cream)
3. Java Leppard (Def Leppard)
4. Guns 'N' Coffees (Guns N' Roses)
5. Black Sabbath Blend (Black Sabbath)
6. The Mocha Crüe (Mötley Crüe)
7. Van Halentino (Van Halen)
8. The Rolling Scones (The Rolling
Stones)
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
1. The Brew Fighters (The Foo Fighters)
2. Cream Roasters (Cream)
3. Java Leppard (Def Leppard)
4. Guns 'N' Coffees (Guns N' Roses)
5. Black Sabbath Blend (Black Sabbath)
6. The Mocha Crüe (Mötley Crüe)
7. Van Halentino (Van Halen)
8. The Rolling Scones (The Rolling
Stones)
9. Grind Maiden (Iron Maiden)
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
1. The Brew Fighters (The Foo Fighters)
2. Cream Roasters (Cream)
3. Java Leppard (Def Leppard)
4. Guns 'N' Coffees (Guns N' Roses)
5. Black Sabbath Blend (Black Sabbath)
6. The Mocha Crüe (Mötley Crüe)
7. Van Halentino (Van Halen)
8. The Rolling Scones (The Rolling
Stones)
9. Grind Maiden (Iron Maiden)
10. AC/Decaf (AC/DC)
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
1. The Brew Fighters (The Foo Fighters)
2. Cream Roasters (Cream)
3. Java Leppard (Def Leppard)
4. Guns 'N' Coffees (Guns N' Roses)
5. Black Sabbath Blend (Black Sabbath)
6. The Mocha Crüe (Mötley Crüe)
7. Van Halentino (Van Halen)
8. The Rolling Scones (The Rolling
Stones)
9. Grind Maiden (Iron Maiden)
10. AC/Decaf (AC/DC)
11. Dire Coffee-straits (Dire Straits)
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
1. The Brew Fighters (The Foo Fighters)
2. Cream Roasters (Cream)
3. Java Leppard (Def Leppard)
4. Guns 'N' Coffees (Guns N' Roses)
5. Black Sabbath Blend (Black Sabbath)
6. The Mocha Crüe (Mötley Crüe)
7. Van Halentino (Van Halen)
8. The Rolling Scones (The Rolling
Stones)
9. Grind Maiden (Iron Maiden)
10. AC/Decaf (AC/DC)
11. Dire Coffee-straits (Dire Straits)
12. …
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@holly_cummins @hannotify #RedHat #InfoSupport
RockStarBucks?
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@holly_cummins @hannotify #RedHat #InfoSupport
JEP Leppard?
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@holly_cummins @hannotify #RedHat #InfoSupport
Bon Jova.
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@holly_cummins @hannotify #RedHat #InfoSupport
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demo
@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Hello World
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Christine says hello world
Say Christine
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@holly_cummins @hannotify #RedHat #InfoSupport
School of Rock(star)
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@holly_cummins @hannotify #RedHat #InfoSupport
Rule 1. If you can’t sing it, you can’t have it.
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@holly_cummins @hannotify #RedHat #InfoSupport
syntax
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demo
@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Let’s Learn ROCKSTAR
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
(This program prints "42")
Comments
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
(This program prints "42")
…but comments are for the weak.
(See Rule 1.)
Comments
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Say "Hello world!"
Output
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Say "Hello world!"
…or ‘shout’, ‘whisper’
Output
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Poetic string literals
Christine says hello world
Initialises Christine with “hello world”, no quotes needed
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
(This program prints “42")
The answer is sing it
Shout the answer
Poetic number literals
Initialises the answer with 42, no quotes needed
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Many ways to say the same thing
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
My dreams were ice. A life unfulfilled;
wakin' everybody up, taking booze and pills
Many ways to say the same thing
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
My dreams were ice. A life unfulfilled;
wakin' everybody up, taking booze and pills
Many ways to say the same thing
The tide is low. A ball flung-about, beach
abandoned, no soiree beats the shore
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
My dreams were ice. A life unfulfilled;
wakin' everybody up, taking booze and pills
Many ways to say the same thing
(3.1415926535)
The tide is low. A ball flung-about, beach
abandoned, no soiree beats the shore
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Input
Listen to your heart
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Input
Initialises your heart with input from stdin
Listen to your heart
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Conditionals
If your heart is open
Say “Love will find a way”
Else say “Livin' on my own”
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Conditionals
If your heart is equal to open…
If your heart is open
Say “Love will find a way”
Else say “Livin' on my own”
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Loops
The walls are high and mighty
While the walls are nothing
Knock the walls down
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Loops
Decrement the walls from 436 until 0.
The walls are high and mighty
While the walls are nothing
Knock the walls down
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Functions
Mama wants power
Send power times power
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Functions
wants defines parameter(s), send returns a result.
Mama wants power
Send power times power
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Arrays
Rock bands with 0, 1, 2
While bands
Let charge be pop bands
Shout Mama taking charge
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Arrays
Rock initialises an array; pop removes an element;
taking separates function name from params
Rock bands with 0, 1, 2
While bands
Let charge be pop bands
Shout Mama taking charge
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@holly_cummins @hannotify #RedHat #InfoSupport
Launching these is annoying.
We can do better, right?
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@holly_cummins @hannotify #RedHat #InfoSupport
We can use Quarkus.
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
Why Quarkus?
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@holly_cummins @hannotify #RedHat #InfoSupport
Why Quarkus?
Quarkus rocks.
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@holly_cummins @hannotify #RedHat #InfoSupport
Why Quarkus?
Quarkus rocks.
No, really. Quarkus rocks.
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@holly_cummins @hannotify #RedHat #InfoSupport
Quarkus rocks.
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@holly_cummins @hannotify #RedHat #InfoSupport
Quarkus rocks.
2022
Hanno
(somewhere under there)
Holly
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
come see us for
these stickers
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@holly_cummins @hannotify #RedHat #InfoSupport
Quarkus rocks
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@holly_cummins @hannotify #RedHat #InfoSupport
Live-coding
Quarkus rocks
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@holly_cummins @hannotify #RedHat #InfoSupport
Live-coding
Native compilation
Quarkus rocks
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@holly_cummins @hannotify #RedHat #InfoSupport
Live-coding
Native compilation
Less boilerplate, more action
Quarkus rocks
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@holly_cummins @hannotify #RedHat #InfoSupport
Live-coding
Native compilation
Less boilerplate, more action
Rockstar developers are not
into that whole brevity thing.
Quarkus rocks
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@holly_cummins @hannotify #RedHat #InfoSupport
Live-coding
Native compilation
Less boilerplate, more action
Dev UI
Rockstar developers are not
into that whole brevity thing.
Quarkus rocks
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@holly_cummins @hannotify #RedHat #InfoSupport
Live-coding
Native compilation
Less boilerplate, more action
Dev UI
Integration with Java libraries
Rockstar developers are not
into that whole brevity thing.
Quarkus rocks
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@holly_cummins @hannotify #RedHat #InfoSupport
Live-coding
Native compilation
Less boilerplate, more action
Dev UI
Integration with Java libraries
Marketplace of extensions
Rockstar developers are not
into that whole brevity thing.
Quarkus rocks
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@holly_cummins @hannotify #RedHat #InfoSupport
Step 1. Write a JVM language.
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@holly_cummins @hannotify #RedHat #InfoSupport
Step 1a. Write a parser.
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@holly_cummins @hannotify #RedHat #InfoSupport
Step 1a. Don’t write a parser. Use Antlr.
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@holly_cummins @hannotify #RedHat #InfoSupport
Generating a grammar
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
THERE ARE NO PARENTHESES IN EXPRESSIONS IN
ROCKSTAR
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@holly_cummins @hannotify #RedHat #InfoSupport
Can the internet help?
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@holly_cummins @hannotify #RedHat #InfoSupport
Can the internet help?
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learning
@holly_cummins @hannotify #RedHat #InfoSupport
Antlr is really useful (once you grok it)
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@holly_cummins @hannotify #RedHat #InfoSupport
How does Antlr work?
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
document
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@holly_cummins @hannotify #RedHat #InfoSupport
document
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@holly_cummins @hannotify #RedHat #InfoSupport
document
output or actions
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@holly_cummins @hannotify #RedHat #InfoSupport
document
rockstar program
output or actions
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@holly_cummins @hannotify #RedHat #InfoSupport
document
rockstar program
output or actions
bytecode
generation
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
document
abstract syntax tree
(AST)
rockstar program
output or actions
bytecode
generation
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
document
abstract syntax tree
(AST)
rockstar program
output or actions
bytecode
generation
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
tokens
document
abstract syntax tree
(AST)
rockstar program
lexing
output or actions
tokens
bytecode
generation
tokens tokens
tokens tokens tokens
tokens
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
tokens
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
bytecode
generation
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
tokens
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
prep work
tokens
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
antlr grammar
prep work
tokens
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
antlr grammar
prep work
defines
tokens
fragment de
fi
nitions
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
antlr grammar token de
fi
nitions
prep work
defines
tokens
fragment de
fi
nitions
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
antlr grammar token de
fi
nitions
prep work
rule de
fi
nitions
defines
tokens
fragment de
fi
nitions
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
antlr grammar token de
fi
nitions
prep work
rule de
fi
nitions
defines
generates
tokens
fragment de
fi
nitions
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
antlr grammar token de
fi
nitions
Java types
prep work
rule de
fi
nitions
defines
generates
tokens
fragment de
fi
nitions
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
antlr grammar token de
fi
nitions
Java types
AST listener
interface
prep work
rule de
fi
nitions
defines
generates
tokens
fragment de
fi
nitions
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
antlr grammar token de
fi
nitions
antlr
Java types
AST listener
interface
prep work
rule de
fi
nitions
defines
generates
tokens
fragment de
fi
nitions
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
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@holly_cummins @hannotify #RedHat #InfoSupport
antlr grammar token de
fi
nitions
antlr
Java types
AST listener
interface
prep work
rule de
fi
nitions
defines
generates
tokens
fragment de
fi
nitions
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
your code
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@holly_cummins @hannotify #RedHat #InfoSupport
antlr grammar token de
fi
nitions
antlr
Java types
AST listener
interface
prep work
type safe accessor
to the result of
parsing
rule de
fi
nitions
defines
generates
tokens
fragment de
fi
nitions
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
your code
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@holly_cummins @hannotify #RedHat #InfoSupport
antlr grammar token de
fi
nitions
antlr
Java types
AST listener
interface
prep work
type safe accessor
to the result of
parsing
rule de
fi
nitions
defines
generates
tokens
fragment de
fi
nitions
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
your code
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
your code
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@holly_cummins @hannotify #RedHat #InfoSupport
antlr grammar token de
fi
nitions
antlr
Java types
AST listener
interface
listener
implementation
prep work
type safe accessor
to the result of
parsing
rule de
fi
nitions
defines
generates
tokens
fragment de
fi
nitions
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
your code
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
uses
your code
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@holly_cummins @hannotify #RedHat #InfoSupport
it took me a while to understand
this bit was needed and what it
might look like
antlr grammar token de
fi
nitions
antlr
Java types
AST listener
interface
listener
implementation
prep work
type safe accessor
to the result of
parsing
rule de
fi
nitions
defines
generates
tokens
fragment de
fi
nitions
document
abstract syntax tree
(AST)
rockstar program
reassemble (“parsing”)
lexing
output or actions
tokens
your code
bytecode
generation
parse-time
tokens tokens
tokens tokens tokens
tokens
rules rules rules
bytecode
uses
your code
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
If the document is a story…
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@holly_cummins @hannotify #RedHat #InfoSupport
If the document is a story…
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@holly_cummins @hannotify #RedHat #InfoSupport
If the document is a story…
Fragments are like letters.
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@holly_cummins @hannotify #RedHat #InfoSupport
If the document is a story…
Fragments are like letters.
Tokens are like words.
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@holly_cummins @hannotify #RedHat #InfoSupport
If the document is a story…
Fragments are like letters.
Tokens are like words.
Rules are like sentences and paragraphs.
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@holly_cummins @hannotify #RedHat #InfoSupport
If the document is a story…
Fragments are like letters.
Tokens are like words.
Rules are like sentences and paragraphs.
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@holly_cummins @hannotify #RedHat #InfoSupport
fragment S: [Ss];
CONSTANT_EMPTY: E M P T Y
| | S I L E N T
| | S I L E N C E;
constant: CONSTANT_UNDEFINED
| | CONSTANT_NULL
| | CONSTANT_TRUE
| | CONSTANT_FALSE
| | CONSTANT_EMPTY;
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@holly_cummins @hannotify #RedHat #InfoSupport
fragment S: [Ss];
CONSTANT_EMPTY: E M P T Y
| | S I L E N T
| | S I L E N C E;
constant: CONSTANT_UNDEFINED
| | CONSTANT_NULL
| | CONSTANT_TRUE
| | CONSTANT_FALSE
| | CONSTANT_EMPTY;
fragment
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@holly_cummins @hannotify #RedHat #InfoSupport
fragment S: [Ss];
CONSTANT_EMPTY: E M P T Y
| | S I L E N T
| | S I L E N C E;
constant: CONSTANT_UNDEFINED
| | CONSTANT_NULL
| | CONSTANT_TRUE
| | CONSTANT_FALSE
| | CONSTANT_EMPTY;
fragment
token
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@holly_cummins @hannotify #RedHat #InfoSupport
fragment S: [Ss];
CONSTANT_EMPTY: E M P T Y
| | S I L E N T
| | S I L E N C E;
constant: CONSTANT_UNDEFINED
| | CONSTANT_NULL
| | CONSTANT_TRUE
| | CONSTANT_FALSE
| | CONSTANT_EMPTY;
fragment
token
simple rule
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@holly_cummins @hannotify #RedHat #InfoSupport
fragment S: [Ss];
CONSTANT_EMPTY: E M P T Y
| | S I L E N T
| | S I L E N C E;
constant: CONSTANT_UNDEFINED
| | CONSTANT_NULL
| | CONSTANT_TRUE
| | CONSTANT_FALSE
| | CONSTANT_EMPTY;
fragment
token
simple rule
regex-like syntax
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@holly_cummins @hannotify #RedHat #InfoSupport
You’re going to need a debugger.
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
public class BytecodeGenerator extends RockstarBaseListener
{
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@holly_cummins @hannotify #RedHat #InfoSupport
public class BytecodeGenerator extends RockstarBaseListener
{
Antlr generates this interface
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@holly_cummins @hannotify #RedHat #InfoSupport
@Override
public void enterProgram(Rockstar.ProgramContext ctx) {
public class BytecodeGenerator extends RockstarBaseListener
{
Antlr generates this interface
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@holly_cummins @hannotify #RedHat #InfoSupport
@Override
public void enterProgram(Rockstar.ProgramContext ctx) {
public class BytecodeGenerator extends RockstarBaseListener
{
one method for each rule
Antlr generates this interface
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@holly_cummins @hannotify #RedHat #InfoSupport
@Override
public void enterProgram(Rockstar.ProgramContext ctx) {
public class BytecodeGenerator extends RockstarBaseListener
{
one method for each rule
Antlr generates this interface
Antlr generates this type
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@holly_cummins @hannotify #RedHat #InfoSupport
@Override
public void enterProgram(Rockstar.ProgramContext ctx) {
public class BytecodeGenerator extends RockstarBaseListener
{
one method for each rule
Antlr generates this interface
Antlr generates this type
@Override
public void enterStatement(Rockstar.StatementContext ctx) {
Rules can nest
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@holly_cummins @hannotify #RedHat #InfoSupport
Step 1b. Generate bytecode.
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learning
@holly_cummins @hannotify #RedHat #InfoSupport
Don’t be afraid to manipulate bytecode;
maybe do be afraid of doing it
with ASM.
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@holly_cummins @hannotify #RedHat #InfoSupport
public class BytecodeGenerator implements Opcodes {
public byte[] generateBytecode(String name) {
ClassWriter cw = new ClassWriter(0);
FieldVisitor fv;
MethodVisitor mv;
AnnotationVisitor av0;
cw.visit(49,
ACC_PUBLIC + ACC_SUPER,
name,
null,
"java/lang/Object",
null);
cw.visitSource("Hello.java", null);
{
mv = cw.visitMethod(ACC_PUBLIC, "", "()V", null, null);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL,
"java/lang/Object",
"",
"()V");
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
{
…
Hello World in ASM
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@holly_cummins @hannotify #RedHat #InfoSupport
package org.example;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
public class BytecodeGenerator implements Opcodes {
public byte[] generateBytecode(String name) {
ClassWriter cw = new ClassWriter(0);
FieldVisitor fv;
MethodVisitor mv;
AnnotationVisitor av0;
cw.visit(49,
ACC_PUBLIC + ACC_SUPER,
name,
null,
"java/lang/Object",
null);
cw.visitSource("Hello.java", null);
{
mv = cw.visitMethod(ACC_PUBLIC, "", "()V", null, null);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL,
"java/lang/Object",
"",
"()V");
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC,
"main",
"([Ljava/lang/String;)V",
null,
null);
mv.visitFieldInsn(GETSTATIC,
"java/lang/System",
"out",
"Ljava/io/PrintStream;");
mv.visitLdcInsn("Hello World");
mv.visitMethodInsn(INVOKEVIRTUAL,
"java/io/PrintStream",
"println",
"(Ljava/lang/String;)V");
mv.visitInsn(RETURN);
mv.visitMaxs(2, 1);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
}
Hello World in ASM
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@holly_cummins @hannotify #RedHat #InfoSupport
mv.visitInsn(ICONST_1)
ASM has never made sense to me -
here “visit” means “create” (obviously?)
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@holly_cummins @hannotify #RedHat #InfoSupport
Gizmo
a humanising layer on top of ASM
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@holly_cummins @hannotify #RedHat #InfoSupport
Step 2. Write a Quarkus extension.
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
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demo
@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
Compiling with Quarkus
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@holly_cummins @hannotify #RedHat #InfoSupport
Yes, we did TDD with Rockstar.
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@holly_cummins @hannotify #RedHat #InfoSupport
How do you write a Rockstar program?
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@holly_cummins @hannotify #RedHat #InfoSupport
How do you write a Rockstar program?
Red, Green, Refactor
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learning
@holly_cummins @hannotify #RedHat #InfoSupport
Quarkus extensions can be
created easily, but adding
support for an alternate
language seems to be
a rare use case
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@holly_cummins @hannotify #RedHat #InfoSupport
Quarkus is a different way of building Java
https://matheuscruz.dev/2024/01/12/developing-a-quarkus-extension/
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@holly_cummins @hannotify #RedHat #InfoSupport
Quarkus is a different way of building Java
It is both a framework and a build time augmentation toolkit.
https://matheuscruz.dev/2024/01/12/developing-a-quarkus-extension/
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@holly_cummins @hannotify #RedHat #InfoSupport
Quarkus is a different way of building Java
It is both a framework and a build time augmentation toolkit.
https://matheuscruz.dev/2024/01/12/developing-a-quarkus-extension/
It focuses on developer experience and extensibility.
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Extensions exist to seamlessly integrate libraries into
Quarkus’ architecture
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@holly_cummins @hannotify #RedHat #InfoSupport
Extensions exist to seamlessly integrate libraries into
Quarkus’ architecture
Which basically means “do more things at build time”.
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@holly_cummins @hannotify #RedHat #InfoSupport
Extensions exist to seamlessly integrate libraries into
Quarkus’ architecture
Which basically means “do more things at build time”.
And there’s more!
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@holly_cummins @hannotify #RedHat #InfoSupport
Writing a Quarkus extension is fairly
straightforward
https://quarkus.io/guides/building-my-first-extension
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@holly_cummins @hannotify #RedHat #InfoSupport
Writing a Quarkus extension is fairly
straightforward
You can follow the “Building my first extension” guide.
https://quarkus.io/guides/building-my-first-extension
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@holly_cummins @hannotify #RedHat #InfoSupport
A Quarkus extension consists of two parts
https://quarkus.io/guides/building-my-first-extension
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@holly_cummins @hannotify #RedHat #InfoSupport
A Quarkus extension consists of two parts
The runtime module, representing the capabilities
that are exposed to the application’s developer.
https://quarkus.io/guides/building-my-first-extension
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@holly_cummins @hannotify #RedHat #InfoSupport
A Quarkus extension consists of two parts
The runtime module, representing the capabilities
that are exposed to the application’s developer.
https://quarkus.io/guides/building-my-first-extension
The deployment module, applying all Quarkus optimisations
during the build, by describing capabilities as build items.
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@holly_cummins @hannotify #RedHat #InfoSupport
So, let’s write an extension that compiles Rockstar programs to
bytecode. Sounds easy enough, right?
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@holly_cummins @hannotify #RedHat #InfoSupport
Let’s stand on the shoulders of giants.
And draw inspiration from the existing support for Kotlin, Groovy & Scala.
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@holly_cummins @hannotify #RedHat #InfoSupport
Let’s stand on the shoulders of giants.
https://quarkus.io/extensions/io.quarkus/quarkus-kotlin
And draw inspiration from the existing support for Kotlin, Groovy & Scala.
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@holly_cummins @hannotify #RedHat #InfoSupport
Let’s stand on the shoulders of giants.
https://quarkus.io/extensions/io.quarkus/quarkus-kotlin
And draw inspiration from the existing support for Kotlin, Groovy & Scala.
https://quarkus.io/extensions/io.quarkus/quarkus-groovy
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@holly_cummins @hannotify #RedHat #InfoSupport
Let’s stand on the shoulders of giants.
https://quarkus.io/extensions/io.quarkus/quarkus-kotlin
And draw inspiration from the existing support for Kotlin, Groovy & Scala.
https://quarkus.io/extensions/io.quarkus/quarkus-groovy
https://quarkus.io/extensions/io.quarkus/quarkus-scala
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@holly_cummins @hannotify #RedHat #InfoSupport
public interface CompilationProvider extends
Closeable {
Set handledExtensions();
void compile(Set files, Context context);
}
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demo
@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
DEV UI
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@holly_cummins @hannotify #RedHat #InfoSupport
Step 3. Solve problems with Rockstar.
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learning
@holly_cummins @hannotify #RedHat #InfoSupport
Programming is hard;
trying to rhyme makes
it harder
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
Hanno:
Hi, can you create a Rockstar program that demonstrates conditionals? And can you make it rhyme?
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
Hanno:
Hi, can you create a Rockstar program that demonstrates conditionals? And can you make it rhyme?
ChatGPT:
Sure, I can help you create a Rockstar program that rhymes and uses conditionals. Here it is.
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
Hanno:
Hi, can you create a Rockstar program that demonstrates conditionals? And can you make it rhyme?
ChatGPT:
Sure, I can help you create a Rockstar program that rhymes and uses conditionals. Here it is.
Hanno:
That program doesn’t rhyme.
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
Hanno:
Hi, can you create a Rockstar program that demonstrates conditionals? And can you make it rhyme?
ChatGPT:
Sure, I can help you create a Rockstar program that rhymes and uses conditionals. Here it is.
Hanno:
That program doesn’t rhyme.
ChatGPT:
My apologies for that oversight. Let me provide you with a corrected Rockstar program.
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
Hanno:
Hi, can you create a Rockstar program that demonstrates conditionals? And can you make it rhyme?
ChatGPT:
Sure, I can help you create a Rockstar program that rhymes and uses conditionals. Here it is.
Hanno:
That program doesn’t rhyme.
ChatGPT:
My apologies for that oversight. Let me provide you with a corrected Rockstar program.
Hanno:
Nice rhyming, but that program doesn’t compile!
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
Hanno:
Hi, can you create a Rockstar program that demonstrates conditionals? And can you make it rhyme?
ChatGPT:
Sure, I can help you create a Rockstar program that rhymes and uses conditionals. Here it is.
Hanno:
That program doesn’t rhyme.
ChatGPT:
My apologies for that oversight. Let me provide you with a corrected Rockstar program.
Hanno:
Nice rhyming, but that program doesn’t compile!
ChatGPT:
I appreciate your patience, apologies. Let me provide you with a corrected Rockstar program.
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learning
@holly_cummins @hannotify #RedHat #InfoSupport
AI isn’t taking our jobs just yet.
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@holly_cummins @hannotify #RedHat #InfoSupport
Can AI help?
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@holly_cummins @hannotify #RedHat #InfoSupport
AI is not very good at inventing interesting esoteric languages.
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@holly_cummins @hannotify #RedHat #InfoSupport
AI is not very good at writing Antlr
grammars for complex things.
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
Step 4. Debugging.
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@holly_cummins @hannotify #RedHat #InfoSupport
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demo
@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
1 Billion Row Challenge
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@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
(Steps: parse the file into rows, aggregate into towns, go through each town and aggregate, print output)
(Utility function for rounding to one decimal place)
doRound takes num
let num be num * 10
turn round num
let num be num / 10
return num
(Step 1: Read lines from stdin and put them into a lines array)
push lines (initialise the array)
listen to stdin (listen to the input, which we choose to call stdin)
while stdin
push stdin into lines
listen to stdin
(Step 2: Sort the lines into an array of results for each station)
push stations (initialise the array)
push stationList (initialise the array outside the while scope)
delimiter is ";"
let line be pop lines
while line
split line into segments with delimiter
let stationName be segments at 0
let stationResults be stations at stationName
if not stationResults
push stationName into stationList (we only do this if first time we have seen this station)
let temperature be segments at 1
push temperature into stationResults (this always leaves us with a mysterious at element 0, and I don't know why)
let stations at stationName be stationResults
pop lines into line
(Now sort the station names, using a bubble sort)
i is 0
let length be stationList (using an array in a scalar context gives its length)
while i is less than length
j is 0
let maxj be length minus i
while j is less than maxj
let aa be stationList at j
let bb be stationList at j + 1
if aa is greater than bb
let stationList at j be bb
let stationList at j + 1 be aa
build j up
build i up
(Now go through each station and aggregate the array; we cannot use a function very easily to iterate because pop removes elements)
let name be pop stationList (we cannot iterate over the array of results since it is most like a map, with non-numeric indexes, so we iterate over the array of names)
let results be "{"
while name
let readings be stations at name
total is 0
min is 300000
max is -300000
pop readings into temperature
pop readings into temperature (do it again because there is a leading mysterious)
count is 0
while temperature
cast temperature
build count up
if temperature is less than min
let min be temperature
if temperature is greater than max
let max be temperature
let total be total + temperature
pop readings into temperature
if count is greater than 0
let mean be total over count
let roundedMean be doRound taking mean
let formatted be min + "/" + roundedMean + "/" + max
let results be results plus name, "=" plus formatted
if stationList at 0 (if this is not the last entry)
let results be results plus ", "
let name be pop stationList
let results be results plus "}"
#1BRC
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@holly_cummins @hannotify #RedHat #InfoSupport
“We’re halfway there!
[with billion row challenge]”
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@holly_cummins @hannotify #RedHat #InfoSupport
“We’re halfway there!
[with billion row challenge]”
“I’m really-really halfway there!
Working real soon now!
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learning
@holly_cummins @hannotify #RedHat #InfoSupport
Engineers are terrible at estimation.
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
“Holly, this happens every time.
Why didn’t you learn from the last
demo you took on?”
-Holly’s husband
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@holly_cummins @hannotify #RedHat #InfoSupport
“Hanno, ben je nou nog
steeds bezig? Je zou toch niet
meer werken in het weekend?”
-Hanno’s wife
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demo
@holly_cummins @hannotify #RedHat #InfoSupport
((Livin’ on A Prayer)
the final demo
Implementation based on one by Martijn Zuidweg
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@holly_cummins @hannotify #RedHat #InfoSupport
What good was any of this?
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@holly_cummins @hannotify #RedHat #InfoSupport
• Interoperability with other JVM languages
• Leverage existing JVM libraries, such as
Apache utils and lang4j
• Your code can be set to music
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Play is valuable.
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@holly_cummins @hannotify #RedHat #InfoSupport
Happiness
increases
productivity
https:/
/hbr.org/2012/01/positive-intelligence
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@holly_cummins @hannotify #RedHat #InfoSupport
Happiness
increases
productivity
“Your brain at positive is
31% more productive than
your brain at negative,
neutral or stressed. "
https:/
/hbr.org/2012/01/positive-intelligence
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@holly_cummins @hannotify #RedHat #InfoSupport
Play increases productivity
https://www2.warwick.ac.uk/fac/soc/economics/staff/eproto/
workingpapers/happinessproductivity.pdf
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@holly_cummins @hannotify #RedHat #InfoSupport
Play increases productivity
"Individuals [who just watched a
comedy video] have approximately
12%
greater productivity."
https://www2.warwick.ac.uk/fac/soc/economics/staff/eproto/
workingpapers/happinessproductivity.pdf
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@holly_cummins @hannotify #RedHat #InfoSupport
Play turns into practicality.
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@holly_cummins @hannotify #RedHat #InfoSupport
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@holly_cummins @hannotify #RedHat #InfoSupport
Recap:
How to run anything
on Quarkus
1. Write a JVM Language
1. Write an Antlr grammar
2. Generate bytecode
2. Write a Quarkus extension
3. Write your programs
4. Find all the coding mistakes you
made
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@holly_cummins @hannotify #RedHat #InfoSupport
… and what
you’ll learn
1. Antlr is really useful
2. Friends don’t let friends use ASM
3. Holly should work harder on the
Quarkus extension documentation
4. Making code rhyme is hard
5. LLMs cannot answer all questions.
6. Engineers are terrible at estimation
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@holly_cummins @hannotify #RedHat #InfoSupport
🤘
slides
https://hollycummins.com/rockstar-jfokus/
We got there!