EWD.js on FHIR. Rob Tweed M/Gateway Developments Ltd. Wednesday, 12 March 14

Transcription

1 on FHIR Rob Tweed M/Gateway Developments Ltd

2 Architecture Caché Or GT.M

3 Architecture Mumps: - Language - Database Caché Or GT.M

4 Architecture Mumps: - Language - Database Caché Or GT.M

5 Architecture Mumps: - Language - Database Caché Or GT.M

6 Architecture Mumps: - Language - Database Caché Or GT.M Exceptional NoSQL Database - high performance - highly scalable - hierachical - projectable in many ways - key/value - graph - object - relational - document

7 Architecture Mumps: - Language - Database Caché Or GT.M

8 Architecture Mumps: - Language - Database Caché Or GT.M What language as a replacement? - popular - similar good parts to Mumps language - quick & easy to develop in - natural fit with database

9 Architecture Mumps: - Language - Database Caché Or GT.M JavaScript - hugely popular and still growing - interpreted - dynamic - un-typed - perfect fit with database - JSON = document database

10 Architecture interfaces Node.js (server-side JavaScript) Caché Or GT.M

11 Architecture HTTP(S) (Interactive Applications) interfaces Node.js (server-side JavaScript) Caché Or GT.M

12 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) interfaces Node.js (server-side JavaScript) Caché Or GT.M

13 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) HTTP(S) (Web Services) interfaces Node.js (server-side JavaScript) Caché Or GT.M

14 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) HTTP(S) (Web Services) Security interfaces Node.js (server-side JavaScript) Caché Or GT.M

15 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) HTTP(S) (Web Services) Security interfaces Node.js (server-side JavaScript) Official InterSystems Interface Module Caché

16 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) HTTP(S) (Web Services) Security interfaces Node.js (server-side JavaScript) NodeM: Open Source reverse-engineer GT.M

17 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) HTTP(S) (Web Services) Security interfaces Node.js (server-side JavaScript) ewdglobals: JSON abstraction of Mumps Globals Official InterSystems Interface Module Caché

18 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) HTTP(S) (Web Services) Security interfaces Node.js (server-side JavaScript) ewdglobals: JSON abstraction of Mumps Globals Official InterSystems Interface Module Mumps Globals Caché

19 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) HTTP(S) (Web Services) Security interfaces Node.js (server-side JavaScript) ewdglobals: JSON abstraction of Mumps Globals Official InterSystems Interface Module Mumps Globals Caché Mumps Functions

20 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) HTTP(S) (Web Services) Security interfaces Node.js (server-side JavaScript) ewdglobals: JSON abstraction of Mumps Globals Official InterSystems Interface Module Mumps Globals Caché FileMan APIs Mumps Functions

21 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) HTTP(S) (Web Services) Security interfaces Node.js (server-side JavaScript) ewdglobals: JSON abstraction of Mumps Globals Official InterSystems Interface Module Mumps Globals Caché FileMan APIs Mumps Functions

22 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) HTTP(S) (Web Services) Security interfaces Node.js (server-side JavaScript) User Back-end Application logic (JavaScript) ewdglobals: JSON abstraction of Mumps Globals Official InterSystems Interface Module Mumps Globals Caché FileMan APIs Mumps Functions

23 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) HTTP(S) (Web Services) Security interfaces Node.js (server-side JavaScript) User Back-end Application logic (JavaScript) ewdglobals: JSON abstraction of Mumps Globals Official InterSystems Interface Module Mumps Globals Caché FileMan APIs Mumps Functions

24 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) HTTP(S) (Web Services) Security interfaces Node.js (server-side JavaScript) User Back-end Application logic (JavaScript) ewdglobals: JSON abstraction of Mumps Globals Official InterSystems Interface Module Mumps Globals Caché FileMan APIs Mumps Functions

25 Architecture HTTP(S) (Interactive Applications) WebSockets (Interactive Applications) HTTP(S) (Web Services) Security interfaces Node.js (server-side JavaScript) User Back-end Application logic (JavaScript) ewdglobals: JSON abstraction of Mumps Globals NodeM: Open Source reverse-engineer Mumps Globals GT.M FileMan APIs Mumps Functions

26 Architecture Pre-forked, constantly-running 26

27 Architecture Pre-forked, constantly-running 100% Stateless All activity handled by a small number of processes 27

28 Development 100% JavaScript 28

29 Secured Web Services HTTP(S) Web Services built-in Need to prevent a free-for-all Uses same security as Amazon Web Services eg for SimpleDB 29

30 Secured Web Services Server Registered users/ clients

31 Secured Web Services Server Access Id + Secure Key Registered users/ clients

32 Secured Web Services Sent to User / client Server Access Id + Secure Key Registered users/ clients

33 Secured Web Services HTTP Request User/ Client &timestamp=xxxxxxxx &accessid=rob12345 Server Registered users/ clients

34 Secured Web Services HTTP Request User/ Client Normalised Create HMAC-SHA-256 digest using secret key Add: &signature=xxxxxxxxxxxxxxxx Server Registered users/ clients

35 Secured Web Services Signed HTTP Request User/ Client Web Service Interface Server Registered users/ clients

36 Secured Web Services User/ Client HTTP Request Processing Remove &signature=xxxx Normalise request Extract accessid from request Web Service Interface Server Registered users/ clients

37 Secured Web Services User/ Client HTTP Request Processing Remove &signature=xxxx Normalise request Extract accessid from request Get secret key for Access Id Web Service Interface Server Registered users/ clients

38 Secured Web Services User/ Client HTTP Request Processing Remove &signature=xxxx Normalise request Extract accessid from request Get secret key for Access Id Generate HMAC-SHA256 digest Web Service Interface Server Registered users/ clients

39 Secured Web Services User/ Client HTTP Request Processing Remove &signature=xxxx Normalise request Extract accessid from request Get secret key for Access Id Generate HMAC-SHA256 digest Web Service Interface Server - Match? Registered users/ clients

40 Secured Web Services User/ Client HTTP Request Processing Remove &signature=xxxx Normalise request Extract accessid from request Get secret key for Access Id Generate HMAC-SHA256 digest Web Service Interface Server - Match? - Don't Match? Registered users/ clients

41 Secured Web Services Server Access Id + Secure Key + Allowed Applications/ Modules Registered users/ clients

42 REST Growing requirement in healthcare many projects/initiatives in VA based on REST-ful interfaces to HL7 FHIR REST is a key part of the standard 42

43 REST Growing requirement in healthcare many projects/initiatives in VA based on REST-ful interfaces to HL7 FHIR REST is a key part of the standard doesn t support REST implement REST interface? 43

44 REST Growing requirement in healthcare many projects/initiatives in VA based on REST-ful interfaces to HL7 FHIR REST is a key part of the standard doesn t support REST implement REST interface? instead, separate EWD REST Server Node.js module: Restify» de facto standard REST implementation for Node.js» tried, tested, stable, fast» customisable! 44

45 FHIR REST Requests EWD REST Server (Node.js restify) Web Service Interface Server

46 FHIR REST Requests EWD REST Server (Node.js restify) Web Service Interface Server Access Id + Secret Key + Application List Registered users/clients

47 URL Re-writing: REST requests rewritten As HTTP Web Service Requests FHIR REST Requests EWD REST Server (Node.js restify) Web Service Interface Server

48 URL Re-writing: REST requests rewritten As HTTP Web Service Requests FHIR REST Requests EWD REST Server (Node.js restify) Then Digitally-signed before transmission Web Service Interface Server

49 FHIR REST Requests EWD REST Server (Node.js restify) Web Service Interface Server No Change required To

50 URL Re-Router Get Observations for patient 1234 from EC2 server Get Observations for patient 1234 from Oroville server 50

51 Server FHIR REST Requests Message Router & URL Rewriter REST Server (Node.js restify) Secure Web Service Request Server or other Mumps system

52 / Node.js Patient CCDA (JSON) _setdocument() Stored in Mumps DB Patient CCDA (XML) File George Lilly s work

53 Forwarded to FHIR REST Server Back-end FHIR Module getobservation(): HL7 FHIR JSON-format getvitals(): JSON-format getvitals(): HL7 FHIR JSON-format Josh Mandel s Blue-button logic Adapted for JSON-formatted CCDA Stored in Mumps Or MongoDB Mumps function API wrapper

54 George Lilly s Rackspace Server Server GT.M FHIR Module Server GT.M: CCDA Database Blood-pressure Application Secure Web Service Requests FHIR REST Requests REST Server (Node.js restify) FHIR Module Server GlobalsDB Rob s EC2 Server

55 You USA? Server GT.M George Lilly s Rackspace Server FHIR Module Server GT.M: CCDA Database Blood-pressure Application My House S.E England Rackspace Cloud USA FHIR REST Requests REST Server (Node.js restify) Secure Web Service Requests FHIR Module Server Amazon Cloud USA GlobalsDB My House S.E England Rob s EC2 Server

56 Try it FHIRDemo/index.html Username: rob Password: secret Note: not designed for use with IE! use Chrome, Firefox or Safari 56

57 George Lilly s Rackspace Server FHIR Module Server GT.M: CCDA Database HL7 FHIR Observation FHIR REST Requests REST Server (Node.js restify) FHIR Module Server GlobalsDB Rob s EC2 Server

58 George Lilly s Rackspace Server FHIR Module Server GT.M: CCDA Database FHIR REST Requests REST Server (Node.js restify) HL7 FHIR Observation FHIR Module Server GlobalsDB Rob s EC2 Server

59 in relation to: Novo VSA 59

60 VSA Adapter (VMRCA) Web Service Interface VSA Calling Service (VMRCS) Regional SOA Federating Services Platform (Java) VSA Adapter (VMRCA) VSA Adapter (VMRCA) Web Service Interface VSA Calling Service (VMRCS) Web Service Interface VSA Calling Service (VMRCS) Regional SOA Federating Services Platform (Java) ESB VSA Architecture as currently proposed

61 Web Service Interface Novo VSA Adapter (VMRCA) VSA Calling Service (VMRCS) Service Invocation Data Storage Cache FHIR Services VSA Adapter (VMRCA) Web Service Interface VSA Calling Service (VMRCS) FHIR Requests/ Responses Web Service Interface VSA Adapter (VMRCA) VSA Calling Service (VMRCS) VSA / Novo potential integration (1)

62 Web Service Interface Novo VSA Adapter (VMRCA) VSA Calling Service (VMRCS) Regional SOA Federating Services Platform (Java) Service Invocation Data Storage Cache FHIR Services VSA Adapter (VMRCA) Web Service Interface VSA Calling Service (VMRCS) FHIR Requests/ Responses Web Service Interface Regional SOA Federating Services Platform (Java) VSA Adapter (VMRCA) VSA Calling Service (VMRCS) VSA / Novo potential integration (2)

63 Web Service Interface Novo VSA Adapter (VMRCA) VSA Calling Service (VMRCS) Regional SOA Federating Services Platform (Java) Service Invocation Data Storage Cache FHIR Services VSA Adapter (VMRCA) Web Service Interface VSA Calling Service (VMRCS) ESB FHIR Requests/ Responses Web Service Interface Regional SOA Federating Services Platform (Java) VSA Adapter (VMRCA) VSA Calling Service (VMRCS) VSA / Novo potential integration (3)

64 / VSA Integration step 1 VSA Wizard -compatible VSA Interface (Mumps wrapper function) Add new output option from wizard that creates a Mumps wrapper function that conforms with approach

65 /VSA Adapter FHIR parser (Node.js) HTTP Web Service Interface Signed HTTPS Requests EWD REST Server (Node.js) FHIR Requests/ Responses /VSA Adapter FHIR parser (Node.js) HTTP Web Service Interface /VSA Adapter FHIR parser (Node.js) HTTP Web Service Interface / VSA Novo Equivalent (1)

66 /VSA Adapter FHIR parser (Node.js) HTTP Web Service Interface EWD REST Server (Node.js) FHIR Requests/ Responses /VSA Adapter FHIR parser (Node.js) Signed HTTPS Requests /VSA Adapter HTTP Web Service Interface FHIR parser (Node.js) HTTP Web Service Interface EWD REST Server (Node.js) FHIR Requests/ Responses / VSA Novo Equivalent (2) Regionalised

67 /VSA Adapter FHIR parser (Node.js) HTTP Web Service Interface EWD REST Server (Node.js) FHIR Requests/ Responses /VSA Adapter FHIR parser (Node.js) Signed HTTPS Requests /VSA Adapter HTTP Web Service Interface FHIR parser (Node.js) HTTP Web Service Interface EWD REST Server (Node.js) FHIR Requests/ Responses / VSA Novo Equivalent (3) Redundant

68 /VSA Adapter FHIR parser (Node.js) HTTP Web Service Interface EWD REST Server (Node.js) FHIR Requests/ Responses /VSA Adapter FHIR parser (Node.js) HTTP Web Service Interface ESB /VSA Adapter FHIR parser (Node.js) HTTP Web Service Interface / VSA Novo Equivalent (4) Using ESB

69 /VSA Adapter FHIR parser (Node.js) HTTP Web Service Interface /VSA Adapter FHIR parser (Node.js) EWD REST Server (Node.js) ESB FHIR Requests/ Responses HTTP Web Service Interface /VSA Adapter FHIR parser (Node.js) HTTP Web Service Interface / VSA Novo Equivalent (5) Using ESB

70 Try it all out Christopher Edwards (OSEHRA) Installer Full details: up and running in 30 minutes includes and EWD REST Server fully installed, configured and running example applications example REST services 70

71 More security details Detailed summary of security for: interactive (WebSocket) applications; HTTP-based Web Services REST Read: 71

72 on FHIR Copy of slides: Rob Tweed M/Gateway Developments Ltd