Bridging Rails to Legacy

A brief introduction to Junctn, an on-premises embedded system provided to 3Bees users, that enables the bridging of the 3Bees web applications to legacy systems running inside the clinic and speaking very disparate protocols.

Transcript

1. Tokyo%Rails%Meetup,%2015510527 Bridging'Rails'to'Legacy Yves%Eric*Mar-n CTO,*MediWeb,*Inc. ©"2015"MediWeb,"Inc. 1
2. ©"2015"MediWeb,"Inc. 2
3. ©"2015"MediWeb,"Inc. 3
4. ©"2015"MediWeb,"Inc. 4
5. 3Bees%in%Numbers ©"2015"MediWeb,"Inc. 5
6. 11"Web"Apps 3"Na%ve"Mobile"Apps 2"On%Premises"Systems ©"2015"MediWeb,"Inc. 6
7. 13#AWS#Instances and$some$Heroku$dynos ©"2015"MediWeb,"Inc. 7
8. 35#Git#Repos (SOA%architecture) ©"2015"MediWeb,"Inc. 8
9. Over%4,000%Clinics 1.3$Million$Pa,ent$Events ©"2015"MediWeb,"Inc. 9
10. ©"2015"MediWeb,"Inc. 10
11. 5.2 $Developers ©"2015"MediWeb,"Inc. 11
12. This%is%one%of%the%smallest%teams,%yet% the%largest%codebase%I%have%ever% worked%with! —"Ma%"Gillingham ©"2015"MediWeb,"Inc. 12
13. December'2014,'Tokyo'Rubyists'Meetup: Ruby%in%a%Suit on#the#Service,Oriented#Architecture#(SOA)# used#in#the#3Bees#backends. ©"2015"MediWeb,"Inc. 13
14. ©"2015"MediWeb,"Inc. 14
15. ©"2015"MediWeb,"Inc. 15
16. ©"2015"MediWeb,"Inc. 16
17. A"big"problem"for"Medical"IT"in"Japan ©"2015"MediWeb,"Inc. 17
18. Rest%of%the%World:%Standards • HL7,&HIPAA,&DICOM,&OpenEHR, • CDA,&CCD,&CCR,&ISO13485, • HISA,&EN13606,&ISBT128,&SNOMED, • ... ©"2015"MediWeb,"Inc. 18
19. Meanwhile,*in*Japan... • ZERO,'ZILCH,'ZIP, • NADA,'NIL,'NOTHING, • (or'pre7y'much) ©"2015"MediWeb,"Inc. 19
20. Let$the$Industry sort$it$out! —"Japanese"government"stance ©"2015"MediWeb,"Inc. 20
21. We#all#know#how#well#that#works... ©"2015"MediWeb,"Inc. 21
22. ©"2015"MediWeb,"Inc. 22
23. ©"2015"MediWeb,"Inc. 23
24. Many%EMR%Vendors%in%Japan • Big%IT:%Panasonic,%Fujitsu,%Hitachi,%Toshiba,%IBM... • More%unexpected:%Secom,%Wacom,%NTT(s) • And%a%plethora%of%small%vendors • Literally%hundreds%of%vendors... ©"2015"MediWeb,"Inc. 24
25. Everybody)and)their)brothers,)making)EMRs)9 9"Source:"m3"h-p:/ /clinic.m3.com/showSpecialSlot.htm?slotId=3960 ©"2015"MediWeb,"Inc. 25
26. Everybody)and)their)brothers,)making)EMRs AND$NO$STANDARDS$to$keep$them$in$check ©"2015"MediWeb,"Inc. 26
27. A"Mess"of"Protocols"and"Data"Schemas • HTTP%(when%lucky),%but%crappy%API • XML%or%CSV%files%on%SMB%shares • Proprietary%raw%TCP%socket%protocol • RSE232%proprietary%serial%protocol ©"2015"MediWeb,"Inc. 27
28. How$do$we$integrate$our Rails$apps$with$this$mess? ©"2015"MediWeb,"Inc. 28
29. Introducing+Junctn ©"2015"MediWeb,"Inc. 29
30. Embedded&System • BeagleBone)Black)/)Raspberry)Pi2 • Custom)Linux)(built)using)Buildroot1) • Runs)a)Sinatra)/)Ruby)stack • DeBstupidifies)the)interoperability)mess • No)power)buGon 1"Buildroot,"Making"Embedded"Linux"Easy"h:p:/ /buildroot.uclibc.org. ©"2015"MediWeb,"Inc. 30
31. De#stupidifying.the.Interoperability.Mess • Presents(a(simple,(sane(API • Standardized(data(schema • Accessible(directly(from(the(browser(using(Javascript ©"2015"MediWeb,"Inc. 31
32. Simple'Opera+ons • Search(pa*ents • Get(pa*ent(details • Check(in(pa*ent ©"2015"MediWeb,"Inc. 32
33. How$We$Use$It ©"2015"MediWeb,"Inc. 33
34. ©"2015"MediWeb,"Inc. 34
35. Challenges • Data%adapta(on • HTTPS%in%a%LAN%without%local%DNS • Making%it%unbreakable • Remote%updates,%to%avoid%the%QA%nightmare%of%having%mul(ple% versions%in%the%field ©"2015"MediWeb,"Inc. 35
36. Making'it'Unbreakable • Journaled+Filesystem+(ext4):+NG • Read:only:+GOOD+(but+can+remounted+R/W) • SquashFS+2+++in+memory:+BEST+(filesystem+immutable;+parLLon+ never+mounted,+enabling+remote+updates) 2"A"compressed"read-only"file"system"for"Linux,"h:p:/ /squashfs.sourceforge.net ©"2015"MediWeb,"Inc. 36
37. Unbreakable)Remote)Updates ©"2015"MediWeb,"Inc. 37
38. How$the$BBB$/$RPi2$boot • Gleefully(ignore(the(Active(par22on(flag! • Find(first(par22on(with(a(FAT(table • Load(binary(blob(bootloader(from(there ©"2015"MediWeb,"Inc. 38
39. The$MBR$Par++on$Table • Par%%on(1:(AAAA(,(BBBB • Par%%on(2:(CCCC(,(DDDD • Par%%on(3:(EEEE(,(FFFF • Par%%on(4:(GGGG(,(HHHH Ranges'do'not'have'to'be'con/nuous, or#even#in#order'(key'point'here) as'long'as'there'is'no'overlap. ©"2015"MediWeb,"Inc. 39
40. Three%Par((ons%Round/Robin%Rota(on ©"2015"MediWeb,"Inc. 40
41. The$Code$3 dd if=/dev/mmcblk0 of=/tmp/rotated_partitions.bin \ count=1 skip=462 bs=32 iflag=skip_bytes && \ dd if=/dev/mmcblk0 of=/tmp/rotated_partitions.bin \ count=1 skip=446 bs=16 seek=32 iflag=skip_bytes \ oflag=seek_bytes,append conv=notrunc && \ dd if=/tmp/rotated_partitions.bin of=/dev/mmcblk0 \ count=1 seek=446 bs=48 oflag=seek_bytes conv=fsync 3"(c)"2015"MediWeb,"Inc.,"Open"Source,"WTFNMFPL?v1"License ©"2015"MediWeb,"Inc. 41
42. Advantages*of*This*Solu3on • No$need$to$keep$state • the$current$boot$par22on$is$always$P1 • the$next$boot$par22on:$P2 • the$last<known<good$par22on:$P3 ©"2015"MediWeb,"Inc. 42
43. Advantages*of*This*Solu3on • Un$l&the&final&write&of&the&rotated&par$$on&table,&the&current& boot&par$$on&is&never&touched.&It&is&not&even&mounted.&So&the& update&process&can&be&interrupted&any&$me&without&bricking&the& device. • The&final&write&of&the&rotated&par$$on&table&happens&aAer&the& next&boot&par$$on&has&been&validated&and&cleanly&unmounted. • The&final&write&is&made&atomic&(count=1)&and&bypasses&the&disk& write&cache&(conv=fsync)&to&reduce&exposure&to&the&minimum. ©"2015"MediWeb,"Inc. 43
44. We#are#always#looking#for#talented#developers Contact'me: +'Yves+Eric'Mar3n +'@yemar3n +'yemar3n@mediweb.jp ©"2015"MediWeb,"Inc. 44
45. Thank&You ©"2015"MediWeb,"Inc. 45