Beam and Gleam - Looking beyond the JVM

Transcript

1. Gleam and BEAM Looking beyond the JVM
2. John Mikael Lindbakk - Writer of code - Speaks - Architects - Sometimes writes stuff that isn’t code Consultant @ bspoke bspoke.no
3. surtoget.no
4. BEAM
5. Our code Spring JVM Container Kernel/OS/Drivers Hardware
6. Our code Spring JVM Container Kernel/OS/Drivers Hardware 40+ million lines of code*
7. Our code Spring JVM Our code Framework Container Container Kernel/OS/Drivers Kernel/OS/Drivers Hardware Hardware
8. Cool-VM
9. Cool-VM Process 1 Process 2
10. Cool-VM Process 1 Process 2
11. Cool-VM Supervisor Process 2 Process 1
12. Server 1 Cool-VM Server 2 Cool-VM
13. Server 1 Server 2 Cool-VM Cluster Cool-VM Cool-VM
14. Server 1 Server 2 Cool-VM Cluster Cool-VM Cool-VM
15. Server 1 Server 2 Cool-VM Cluster Cool-VM Service discovery (Process registration) Cool-VM Cache Database
16. Our code Spring JVM Our code Framework Container Container Kernel/OS/Drivers Kernel/OS/Drivers Hardware Hardware
17. Our code Spring JVM Our code Framework Our code Framework Container Container Language VM Kernel/OS/Drivers Kernel/OS/Drivers Kernel/OS/Drivers Hardware Hardware Hardware
18. Our code Spring JVM Our code Framework Framework Container Container BEAM Kernel/OS/Drivers Kernel/OS/Drivers Kernel/OS/Drivers Hardware Hardware Hardware Our code
19. pen O Telecom P latform
20. Distributed database O In-memory cache T Message passing P (And much more) Graphical debugger
21. Transaction Service
22. Account Service Transaction Service Reporting Service Anti-fraud Service
23. Account Service Transaction Service Reporting Service Anti-fraud Service
24. Account Service Transaction Service Reporting Service Anti-fraud Service
28. Try to see what you can do on the JVM before reaching for external tools
29. Gleam
31. Imports Variables Main function Passing parameters Parameters and type Returns Return types
32. Pattern matching > If-statements
37. Enforce correctness through types
46. Errors as values > Exceptions
50. Method Fragile Method
51. Method Fragile Method
52. Method Method Fragile Method
53. Main Method Method Fragile Method
54. VM crash Main Method Method Fragile Method
55. VM crash Main Is the exception caught? Method Method Fragile Method
56. VM crash Main Main Method Function Method Function Fragile Method Fragile Function
57. Main Decision Function Decision Function Decision Fragile Function
58. Process Main Decision Function Decision Function Decision Fragile Function
59. Process Supervisor Main Decision Function Decision Function Decision Fragile Function
64. Size matters
65. Size matters
66. 60+ keywords 70+ keywords ~80 keywords
67. Source: Image from ”Gleam and the value of small | Ubuntu Summit 26.04” By Giacomo Cavalieri Link: https://www.youtube.com/watch?v=E6_JqYMeNqs
68. Takeaways - Consider local tools before expensive adoptions.
69. Takeaways - Consider local tools before expensive adoptions. - Use the type system to enforce correctness.
70. Takeaways - Consider local tools before expensive adoptions. - Use the type system to enforce correctness. - Avoid using exceptions for things that are not exceptional.
71. Takeaways - Consider local tools before expensive adoptions. - Use the type system to enforce correctness. - Avoid using exceptions for things that are not exceptional. - Have a clear vision for what language features you actually need and stick to them. Drive simplicity through restriction.
72. Takeaways - Consider local tools before expensive adoptions. - Use the type system to enforce correctness. - Avoid using exceptions for things that are not exceptional. - Have a clear vision for what language features you actually need and stick to them. Drive simplicity through restriction. - Give Gleam a try
73. Thank you! Slides on lindbakk.com (When I find time to upload them...) Try Gleam out over at gleam.run If you try Gleam, consider supporting