The World is a Network (and We Are Just Nodes)

Slides for my Gig City Elixir 2024 talk.

Transcript

2. ANDREALEOPARDI.COM @WHATYOUHIDE
4. @ITALIANCOMMENTS ITALIANS MAD AT FOOD
12. NETWORK PROGRAMMING
14. BANANA 1 BANANA 2 A = TRUE YO, A IS TRUE GOTCHA
15. BANANA 1 BANANA 2 A = TRUE YO, A IS TRUE GOTCHA X
16. PERSON 1 PERSON 2 A = TRUE YO, A IS TRUE GOTCHA X
17. PROCESS 1 PERSON 2 A = TRUE YO, A IS TRUE GOTCHA X
18. PROCESS 1 PERSON 2 A = TRUE YO, A IS TRUE GOTCHA X
20. CLIENT SERVER
21. DISTSYS 101
22. CABLES WAVES
23. BEAM
24. MSG1 MSG2
25. MSG1 MSG2
26. NODE NODE
27. NODE NODE
28. MSG ACK
29. ref = make_ref() send(dest_pid, {ref, self(), msg}) receive do {^ref, response} -> # ... end receive do {ref, sender_pid, msg} -> response = act_on_message(msg) send(sender_pid, {ref, response}) end
30. ref = make_ref() send(dest_pid, {ref, self(), msg}) receive do {^ref, response} -> # ... after 1000 -> :timeout end receive do {ref, sender_pid, msg} -> response = act_on_message(msg) send(sender_pid, {ref, response}) end
32. :gen_tcp.send(socket, "Hello world") {:ok, data} = :gen_tcp.recv(socket, 0, _timeout = 1000) {:ok, data} = :gen_tcp.recv(socket, 0) response = process_request(data) :gen_tcp.send(socket, response)
33. :gen_tcp.send(socket, "Hello world") receive do {:tcp, ^socket, response} -> # ... after 1000 -> :timeout end receive do {:tcp, socket, data} -> response = process_request(data) :gen_tcp.send(socket, response) end
34. GENSERVER.CALL/3
36. SERVERS
37. CLIENT CLIENT
38. REACTIVE
41. SUPERVISORS
44. CLIENTS
45. GEN_STATEM
47. IT'S ABOUT THE GUARANTEES
48. RESTARTING A PROCESS IS ABOUT BRINGING IT BACK TO A STABLE, KNOWN STATE. FROM THERE, THINGS CAN BE RETRIED. WHEN THE INITIALIZATION ISN'T STABLE, SUPERVISION IS WORTH VERY LITTLE.
49. LET IT CRASH™? ...NO
50. PATTERN MATCHING BINARIES
51. <<message_id::binary-size(2), qr::1, opcode::4, flag_aa::1, flag_tc::1, flag_rd::1, flag_ra::1, _reserved::3, rcode::4, qd_count::16, an_count::16, ns_count::16, ar_count::16, answer::binary>> = dns_packet
52. WHY IS THE BEAM SUCH A GREAT FIT?
54. - ERLANG BLOG POST ABOUT MESSAGE PASSING - MY BLOG POST ON TCP CONNECTIONS IN ELIXIR - MY BLOG POST ON GEN_STATEM CONNECTIONS - "IT'S ALL ABOUT THE GUARANTEES" BY FRED HEBERT - THOUSAND ISLANDS ELIXIR LIBRARY - END-TO-END ARGUMENTS IN SYSTEM DESIGN PAPER - BINARY PATTERN MATCHING REFERENCE
55. @WHATYOUHIDE THANK YOU!