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QEWD.js, JSON Web Tokens & MicroServices

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Rob Tweed

The document discusses the architecture and functionality of qewd.js, a framework built on Node.js, which handles incoming requests through a master process and worker processes. It describes how requests are queued, processed, and the role of various databases like GT.M, YottaDB, and Redis in providing session storage and caching. Additionally, it outlines the use of JSON Web Tokens (JWT) for secure claims representation between clients and servers.

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Copyright © 2017 M/Gateway Developments Ltd QEWD.js, JSON Web Tokens & MicroServices Rob Tweed M/Gateway Developments Ltd Twitter: @rtweed http://www.mgateway.com
Copyright © 2017 M/Gateway Developments Ltd QEWD.js
Copyright © 2017 M/Gateway Developments Ltd Read all about it on the Node.js Foundation's Collection Site
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture Node.js
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Master Process •Outward-facing interfaces •Queue
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io HTTP / HTTPS
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io HTTP / HTTPS REST
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io WebSockets
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Pool of Worker Processes •Do the work •Connect to databases
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture Database, abstracted as: •Persistent JavaScript Objects •Fine-grained Document Database Node.js Worker Process
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture Database, abstracted as: •Persistent JavaScript Objects •Fine-grained Document Database Node.js Worker Process • Cache • GT.M • YottaDB • Redis "Global Storage" Databases
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture Database, abstracted as: •Persistent JavaScript Objects •Fine-grained Document Database Node.js Worker Process Closely-coupled In-process connection •Cache •GT.M •YottaDB
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture Database, abstracted as: •Persistent JavaScript Objects •Fine-grained Document Database Node.js Worker Process Loosely-coupled Networked connection •Cache •GT.M •YottaDB •Redis
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture Database, abstracted as: •Persistent JavaScript Objects •Fine-grained Document Database Node.js Worker Process Used by QEWD.js itself As Session Storage Database uuid-formatted token used for session Identification Built-in to QEWD.js
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client HTTP / HTTPS REST
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client WebSockets
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client HTTP / HTTPS
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client WebSocket
Copyright © 2017 M/Gateway Developments Ltd Master Node.js Process Queue Queue processor/ dispatcher Incoming Request QEWD Architecture Every incoming request is passed from Express or socket.io and placed in a queue No further processing of requests occurs in the master process
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Queue dispatcher is invoked whenever a request is added to the queue
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Node.js Worker Process Master Node.js Process Queue Queue processor/ dispatcher Worker process started if none available
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Node.js Worker Process Master Node.js Process Queue Queue processor/ dispatcher application Handler module Database QEWD & application-specific Modules loaded and connected to database: Cache, GT.M YottaDB or Redis
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Node.js Worker Process Master Node.js Process Queue Queue processor/ dispatcher Node.js Worker Process Request passed to worker application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Node.js Worker Process Master Node.js Process Queue Queue processor/ dispatcher Worker flagged as Unavailable Node.js Worker Process Begin processing message application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Unavailable / processing Another incoming request Node.js Worker ProcessNode.js Worker Process application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Node.js Worker Process Master Node.js Process Queue Queue processor/ dispatcher Unavailable / processing Node.js Worker ProcessNode.js Worker Process Node.js Worker Process If worker pool size not exceeded, another worker is started and request passed to it application Handler module Database application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Unavailable / processing Node.js Worker ProcessNode.js Worker Process If entire Worker Pool is busy: Unavailable / processing Node.js Worker ProcessNode.js Worker Process Unavailable / processing Node.js Worker ProcessNode.js Worker Process application Handler module Database application Handler module Database application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Unavailable / processing Node.js Worker ProcessNode.js Worker Process If entire Worker Pool is busy: Unavailable / processing Node.js Worker ProcessNode.js Worker Process Unavailable / processing Node.js Worker ProcessNode.js Worker Process New requests remain in queue application Handler module Database application Handler module Database application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Unavailable / processing Node.js Worker ProcessNode.js Worker Process As soon as a worker is available again, a queued message can be passed to it Unavailable / processing Node.js Worker ProcessNode.js Worker Process Available Node.js Worker Process application Handler module Database application Handler module Database application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Finished Node.js Worker ProcessNode.js Worker ProcessNode.js Worker Process A user's handler function signals completion using the function: finished(responseObject); This returns the response object to the master process application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Finished Node.js Worker ProcessNode.js Worker ProcessNode.js Worker Process And the response is passed to Express or socket.io, which returns it to the client that sent the original request application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Available Node.js Worker Process The finished() function also automatically returns the worker process back to the available pool So it can now handle the next queued request application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Available Node.js Worker Process Worker processes, once started, are persistent No start-up / tear-down cost Workers will automatically close themselves down if they are inactive for more than a pre-set threshold time period application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Available Node.js Worker Process Worker processes only handle a single request at a time application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Available Node.js Worker Process Worker processes only handle a single request at a time Completely isolated run-time environment for handler functions No need for concerns about Node.js concurrency, so synchronous APIs can be used application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Available Node.js Worker Process Long-running or CPU-intensive logic has no direct impact on other worker processes or the master process application Handler module Database
Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Node.js concurrency is handled by the master process. 100% asynchronous logic The master process does almost nothing No CPU-intensive or long- running tasks, so very high-performance All the work happens in the isolated worker processes Multiple Concurrent Incoming requests
Copyright © 2017 M/Gateway Developments Ltd Scaling out QEWD.js
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Allows all available CPU cores to be fully utilised, eg •One for master process •One for each worker process
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Beyond a single instance?
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Load Balancer Or Proxy (eg nginx)
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Load Balancer Or Proxy (eg nginx) Database Database Database
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Load Balancer Or Proxy (eg nginx) Database Database Database Session resides on a specific QEWD instance Session
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Database
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Database Eg shared access to QEWD Sessions Session
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Database eg Cache ECP Database Actual Session Mapped Session Database Mapped Session Database Mapped Session
Copyright © 2017 M/Gateway Developments Ltd Beyond a single site/LAN?
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Distributed Architecture? ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Sharing the same database becomes a problem Performance? Scalability? Database
Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens
Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens • an open, industry standard RFC 7519 method for representing claims securely between two parties. • https://jwt.io/
Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens Three Base64-encoded parts, separated by "."
Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens
Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens
Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens
Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Secret key
Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Initial request to server Secret key
Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Create initial JWT using secret key
Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Return JWT with response
Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Save JWT in client •Cookie •Local storage
Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client JWT sent with every subsequent request
Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Verify JWT's signature using secret key
Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Error if JWT is invalid
Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Response if JWT is OK ✔️
Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client And optionally include updated JWT ✔️ • Updated values • New claims
Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Replace JWT in client •Cookie •Local storage
Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Server has secret key
Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Client doesn't
Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Server can verify JWT Server can read JWT Server can modify JWT
Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Client can only read JWT's contents Can't change them – signature would no longer match
Copyright © 2017 M/Gateway Developments Ltd JWT Purposes • Authentication • Holding session data
Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens
Copyright © 2017 M/Gateway Developments Ltd JWT Purposes • Authentication • Holding session data – But in client (eg browser) – Not on server
Copyright © 2017 M/Gateway Developments Ltd JWT Purposes • Authentication • Holding session data – But in client (eg browser) – Not on server • Allows for very long session retention – That would otherwise result in huge amounts of session data in database
Copyright © 2017 M/Gateway Developments Ltd JWT Purposes • Authentication • Holding session data – But in client (eg browser) – Not on server • Allows a completely stateless architecture – Server only needs a secret key
Copyright © 2017 M/Gateway Developments Ltd JWT Purposes • Authentication • Holding session data – But in client (eg browser) – Not on server • Allows a distributed architecture – Servers need only share a common secret
Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Both servers share same secret key Server
Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Server Create initial JWT
Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Server Validate and use JWT
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Load Balancer Or Proxy (eg nginx)
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Distributed Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client
Copyright © 2017 M/Gateway Developments Ltd Monolithic QEWD Applications ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process All aspects of the application's functionality is handled by the one suite of software •User authentication •Demographics •Clinical data •Pharmacy data •etc
Copyright © 2017 M/Gateway Developments Ltd MicroServices
Copyright © 2017 M/Gateway Developments Ltd MicroService Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy
Copyright © 2017 M/Gateway Developments Ltd MicroService Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration
Copyright © 2017 M/Gateway Developments Ltd MicroService QEWD Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Master server •Integration •Orchestration
Copyright © 2017 M/Gateway Developments Ltd MicroService Overhead ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration HTTP
Copyright © 2017 M/Gateway Developments Ltd MicroService Overhead ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration HTTPS
Copyright © 2017 M/Gateway Developments Ltd HTTPS Handshake Overhead Server Client
Copyright © 2017 M/Gateway Developments Ltd HTTPS Handshake Overhead Server Client Request sent over secured connection
Copyright © 2017 M/Gateway Developments Ltd HTTPS Handshake Overhead Server Client Response returned over secured connection
Copyright © 2017 M/Gateway Developments Ltd HTTPS Handshake Overhead Server Client Connection torn down
Copyright © 2017 M/Gateway Developments Ltd HTTPS Handshake Overhead Server Client Repeat all over again for next request
Copyright © 2017 M/Gateway Developments Ltd MicroService Overhead ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration HTTPS
Copyright © 2017 M/Gateway Developments Ltd MicroService Chain ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration HTTPS
Copyright © 2017 M/Gateway Developments Ltd MicroService Chain ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration HTTPS Latency can build up
Copyright © 2017 M/Gateway Developments Ltd Industry Solutions, eg nginx
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io WebSockets
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io WebSockets Browser ewd-client socket.io-client
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Persistent Bi-directional WebSocket connection Browser ewd-client socket.io-client Secured over HTTPS
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Browser ewd-client socket.io-client
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Browser ewd-client socket.io-client socket.io will automatically re-connect
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Browser ewd-client socket.io-client QEWD automatically re-registers application
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client What if we added into QEWD's master process the equivalent to ewd-client?
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Persistent Bi-directional WebSocket connection Secured over HTTPS ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Persistent Bi-directional WebSocket connection Secured over HTTPS ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client No difference to requests from browser
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Same Re-connection and re- registration mechanism ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client No difference to requests from browser
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client Incoming REST request
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client Incoming WebSocket request
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client Incoming WebSocket request Process Locally?
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client Incoming WebSocket request Handled by remote MicroService?
Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Persistent Bi-directional WebSocket connection Secured over HTTPS ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client Remote QEWD MicroService
Copyright © 2017 M/Gateway Developments Ltd QEWD MicroService Fabric ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration HTTPS WebSocket Connections
Copyright © 2017 M/Gateway Developments Ltd QEWD JWT & MicroService Support • JWT & MicroService support already released for QEWD WebSocket applications • Support for REST-based QEWD MicroServices currently in development – Includes template-based routing definitions – Includes integration of federation functionality • cf ewd-feder8
Copyright © 2017 M/Gateway Developments Ltd How to find out more? • http://qewdjs.com • https://github.com/robtweed/qewd • https://github.com/robtweed/ewd-qoper8 • https://medium.com/the-node-js-collection/hav

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QEWD.js, JSON Web Tokens & MicroServices

  • 1. Copyright © 2017 M/Gateway Developments Ltd QEWD.js, JSON Web Tokens & MicroServices Rob Tweed M/Gateway Developments Ltd Twitter: @rtweed http://www.mgateway.com
  • 2. Copyright © 2017 M/Gateway Developments Ltd QEWD.js
  • 3. Copyright © 2017 M/Gateway Developments Ltd Read all about it on the Node.js Foundation's Collection Site
  • 4. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture Node.js
  • 5. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Master Process •Outward-facing interfaces •Queue
  • 6. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io HTTP / HTTPS
  • 7. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io HTTP / HTTPS REST
  • 8. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io WebSockets
  • 9. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Pool of Worker Processes •Do the work •Connect to databases
  • 10. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture Database, abstracted as: •Persistent JavaScript Objects •Fine-grained Document Database Node.js Worker Process
  • 11. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture Database, abstracted as: •Persistent JavaScript Objects •Fine-grained Document Database Node.js Worker Process • Cache • GT.M • YottaDB • Redis "Global Storage" Databases
  • 12. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture Database, abstracted as: •Persistent JavaScript Objects •Fine-grained Document Database Node.js Worker Process Closely-coupled In-process connection •Cache •GT.M •YottaDB
  • 13. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture Database, abstracted as: •Persistent JavaScript Objects •Fine-grained Document Database Node.js Worker Process Loosely-coupled Networked connection •Cache •GT.M •YottaDB •Redis
  • 14. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture Database, abstracted as: •Persistent JavaScript Objects •Fine-grained Document Database Node.js Worker Process Used by QEWD.js itself As Session Storage Database uuid-formatted token used for session Identification Built-in to QEWD.js
  • 15. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client HTTP / HTTPS REST
  • 16. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client WebSockets
  • 17. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client
  • 18. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client
  • 19. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client
  • 20. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client HTTP / HTTPS
  • 21. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Browser Or Client WebSocket
  • 22. Copyright © 2017 M/Gateway Developments Ltd Master Node.js Process Queue Queue processor/ dispatcher Incoming Request QEWD Architecture Every incoming request is passed from Express or socket.io and placed in a queue No further processing of requests occurs in the master process
  • 23. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Queue dispatcher is invoked whenever a request is added to the queue
  • 24. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Node.js Worker Process Master Node.js Process Queue Queue processor/ dispatcher Worker process started if none available
  • 25. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Node.js Worker Process Master Node.js Process Queue Queue processor/ dispatcher application Handler module Database QEWD & application-specific Modules loaded and connected to database: Cache, GT.M YottaDB or Redis
  • 26. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Node.js Worker Process Master Node.js Process Queue Queue processor/ dispatcher Node.js Worker Process Request passed to worker application Handler module Database
  • 27. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Node.js Worker Process Master Node.js Process Queue Queue processor/ dispatcher Worker flagged as Unavailable Node.js Worker Process Begin processing message application Handler module Database
  • 28. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Unavailable / processing Another incoming request Node.js Worker ProcessNode.js Worker Process application Handler module Database
  • 29. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Node.js Worker Process Master Node.js Process Queue Queue processor/ dispatcher Unavailable / processing Node.js Worker ProcessNode.js Worker Process Node.js Worker Process If worker pool size not exceeded, another worker is started and request passed to it application Handler module Database application Handler module Database
  • 30. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Unavailable / processing Node.js Worker ProcessNode.js Worker Process If entire Worker Pool is busy: Unavailable / processing Node.js Worker ProcessNode.js Worker Process Unavailable / processing Node.js Worker ProcessNode.js Worker Process application Handler module Database application Handler module Database application Handler module Database
  • 31. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Unavailable / processing Node.js Worker ProcessNode.js Worker Process If entire Worker Pool is busy: Unavailable / processing Node.js Worker ProcessNode.js Worker Process Unavailable / processing Node.js Worker ProcessNode.js Worker Process New requests remain in queue application Handler module Database application Handler module Database application Handler module Database
  • 32. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Unavailable / processing Node.js Worker ProcessNode.js Worker Process As soon as a worker is available again, a queued message can be passed to it Unavailable / processing Node.js Worker ProcessNode.js Worker Process Available Node.js Worker Process application Handler module Database application Handler module Database application Handler module Database
  • 33. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Finished Node.js Worker ProcessNode.js Worker ProcessNode.js Worker Process A user's handler function signals completion using the function: finished(responseObject); This returns the response object to the master process application Handler module Database
  • 34. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Finished Node.js Worker ProcessNode.js Worker ProcessNode.js Worker Process And the response is passed to Express or socket.io, which returns it to the client that sent the original request application Handler module Database
  • 35. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Available Node.js Worker Process The finished() function also automatically returns the worker process back to the available pool So it can now handle the next queued request application Handler module Database
  • 36. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Available Node.js Worker Process Worker processes, once started, are persistent No start-up / tear-down cost Workers will automatically close themselves down if they are inactive for more than a pre-set threshold time period application Handler module Database
  • 37. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Available Node.js Worker Process Worker processes only handle a single request at a time application Handler module Database
  • 38. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Available Node.js Worker Process Worker processes only handle a single request at a time Completely isolated run-time environment for handler functions No need for concerns about Node.js concurrency, so synchronous APIs can be used application Handler module Database
  • 39. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Available Node.js Worker Process Long-running or CPU-intensive logic has no direct impact on other worker processes or the master process application Handler module Database
  • 40. Copyright © 2017 M/Gateway Developments Ltd QEWD Architecture Master Node.js Process Queue Queue processor/ dispatcher Node.js concurrency is handled by the master process. 100% asynchronous logic The master process does almost nothing No CPU-intensive or long- running tasks, so very high-performance All the work happens in the isolated worker processes Multiple Concurrent Incoming requests
  • 41. Copyright © 2017 M/Gateway Developments Ltd Scaling out QEWD.js
  • 42. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Allows all available CPU cores to be fully utilised, eg •One for master process •One for each worker process
  • 43. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Beyond a single instance?
  • 44. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Load Balancer Or Proxy (eg nginx)
  • 45. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Load Balancer Or Proxy (eg nginx) Database Database Database
  • 46. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Load Balancer Or Proxy (eg nginx) Database Database Database Session resides on a specific QEWD instance Session
  • 47. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Database
  • 48. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Database Eg shared access to QEWD Sessions Session
  • 49. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Database eg Cache ECP Database Actual Session Mapped Session Database Mapped Session Database Mapped Session
  • 50. Copyright © 2017 M/Gateway Developments Ltd Beyond a single site/LAN?
  • 51. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Distributed Architecture? ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Sharing the same database becomes a problem Performance? Scalability? Database
  • 52. Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens
  • 53. Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens • an open, industry standard RFC 7519 method for representing claims securely between two parties. • https://jwt.io/
  • 54. Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens Three Base64-encoded parts, separated by "."
  • 55. Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens
  • 56. Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens
  • 57. Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens
  • 58. Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Secret key
  • 59. Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Initial request to server Secret key
  • 60. Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Create initial JWT using secret key
  • 61. Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Return JWT with response
  • 62. Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Save JWT in client •Cookie •Local storage
  • 63. Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client JWT sent with every subsequent request
  • 64. Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Verify JWT's signature using secret key
  • 65. Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Error if JWT is invalid
  • 66. Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Response if JWT is OK ✔️
  • 67. Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client And optionally include updated JWT ✔️ • Updated values • New claims
  • 68. Copyright © 2017 M/Gateway Developments Ltd Basic use of JWTs Server Client Replace JWT in client •Cookie •Local storage
  • 69. Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Server has secret key
  • 70. Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Client doesn't
  • 71. Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Server can verify JWT Server can read JWT Server can modify JWT
  • 72. Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Client can only read JWT's contents Can't change them – signature would no longer match
  • 73. Copyright © 2017 M/Gateway Developments Ltd JWT Purposes • Authentication • Holding session data
  • 74. Copyright © 2017 M/Gateway Developments Ltd JSON Web Tokens
  • 75. Copyright © 2017 M/Gateway Developments Ltd JWT Purposes • Authentication • Holding session data – But in client (eg browser) – Not on server
  • 76. Copyright © 2017 M/Gateway Developments Ltd JWT Purposes • Authentication • Holding session data – But in client (eg browser) – Not on server • Allows for very long session retention – That would otherwise result in huge amounts of session data in database
  • 77. Copyright © 2017 M/Gateway Developments Ltd JWT Purposes • Authentication • Holding session data – But in client (eg browser) – Not on server • Allows a completely stateless architecture – Server only needs a secret key
  • 78. Copyright © 2017 M/Gateway Developments Ltd JWT Purposes • Authentication • Holding session data – But in client (eg browser) – Not on server • Allows a distributed architecture – Servers need only share a common secret
  • 79. Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Both servers share same secret key Server
  • 80. Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Server Create initial JWT
  • 81. Copyright © 2017 M/Gateway Developments Ltd JWT security Server Client Server Validate and use JWT
  • 82. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Load Balancer Or Proxy (eg nginx)
  • 83. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Distributed Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client
  • 84. Copyright © 2017 M/Gateway Developments Ltd Monolithic QEWD Applications ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process All aspects of the application's functionality is handled by the one suite of software •User authentication •Demographics •Clinical data •Pharmacy data •etc
  • 85. Copyright © 2017 M/Gateway Developments Ltd MicroServices
  • 86. Copyright © 2017 M/Gateway Developments Ltd MicroService Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy
  • 87. Copyright © 2017 M/Gateway Developments Ltd MicroService Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration
  • 88. Copyright © 2017 M/Gateway Developments Ltd MicroService QEWD Architecture ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Master server •Integration •Orchestration
  • 89. Copyright © 2017 M/Gateway Developments Ltd MicroService Overhead ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration HTTP
  • 90. Copyright © 2017 M/Gateway Developments Ltd MicroService Overhead ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration HTTPS
  • 91. Copyright © 2017 M/Gateway Developments Ltd HTTPS Handshake Overhead Server Client
  • 92. Copyright © 2017 M/Gateway Developments Ltd HTTPS Handshake Overhead Server Client Request sent over secured connection
  • 93. Copyright © 2017 M/Gateway Developments Ltd HTTPS Handshake Overhead Server Client Response returned over secured connection
  • 94. Copyright © 2017 M/Gateway Developments Ltd HTTPS Handshake Overhead Server Client Connection torn down
  • 95. Copyright © 2017 M/Gateway Developments Ltd HTTPS Handshake Overhead Server Client Repeat all over again for next request
  • 96. Copyright © 2017 M/Gateway Developments Ltd MicroService Overhead ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration HTTPS
  • 97. Copyright © 2017 M/Gateway Developments Ltd MicroService Chain ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration HTTPS
  • 98. Copyright © 2017 M/Gateway Developments Ltd MicroService Chain ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration HTTPS Latency can build up
  • 99. Copyright © 2017 M/Gateway Developments Ltd Industry Solutions, eg nginx
  • 100. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io WebSockets
  • 101. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io WebSockets Browser ewd-client socket.io-client
  • 102. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Persistent Bi-directional WebSocket connection Browser ewd-client socket.io-client Secured over HTTPS
  • 103. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Browser ewd-client socket.io-client
  • 104. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Browser ewd-client socket.io-client socket.io will automatically re-connect
  • 105. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Browser ewd-client socket.io-client QEWD automatically re-registers application
  • 106. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client What if we added into QEWD's master process the equivalent to ewd-client?
  • 107. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Persistent Bi-directional WebSocket connection Secured over HTTPS ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client
  • 108. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Persistent Bi-directional WebSocket connection Secured over HTTPS ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client No difference to requests from browser
  • 109. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Same Re-connection and re- registration mechanism ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client No difference to requests from browser
  • 110. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client Incoming REST request
  • 111. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client Incoming WebSocket request
  • 112. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client Incoming WebSocket request Process Locally?
  • 113. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client Incoming WebSocket request Handled by remote MicroService?
  • 114. Copyright © 2017 M/Gateway Developments Ltd QEWD.js Solution ewd-qoper8 queue Express Node.js socket.io Persistent Bi-directional WebSocket connection Secured over HTTPS ewd-qoper8 queue Express Node.js socket.io Equivalent to ewd-client socket.io-client Remote QEWD MicroService
  • 115. Copyright © 2017 M/Gateway Developments Ltd QEWD MicroService Fabric ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process User authentication Demographics Pharmacy ewd-qoper8 queue Express Node.js socket.io Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Cache GT.M, YottaDB Redis Node.js Worker Process Client Orchestration HTTPS WebSocket Connections
  • 116. Copyright © 2017 M/Gateway Developments Ltd QEWD JWT & MicroService Support • JWT & MicroService support already released for QEWD WebSocket applications • Support for REST-based QEWD MicroServices currently in development – Includes template-based routing definitions – Includes integration of federation functionality • cf ewd-feder8
  • 117. Copyright © 2017 M/Gateway Developments Ltd How to find out more? • http://qewdjs.com • https://github.com/robtweed/qewd • https://github.com/robtweed/ewd-qoper8 • https://medium.com/the-node-js-collection/hav