Multipurpose Application Server for Node.JS. All decisions are made. Solutions are scaled. Tools are provided and optimized for high load. Ready for applied development and production.

1. Multipurpose Application Server for Node.JS
All decisions are made. Solutions are scaled
Tools are provided and optimized for high load
Ready for applied development and production

2. Scaling
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
1
Multiple applications
• at single server
• at single node.js process
• at single tcp/ip port
• at one domain (different path)
One application
• multiple processes at single server
• multiple processes at multiple servers
• at multiple domains (virtualhosts)
• at multiple network interfaces
• at multiple ports
• over multiple protocols

3. Scaling
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
2
Deployment strategies:
• All in one process (for development):
cluster.strategy: "single"
• Separate process for each host/port pair:
cluster.strategy: "specialization"
• Single server cluster, master + multiple workers
cluster: { strategy: "multiple", workers: N }
• Single server cluster with IP-sticky
cluster.strategy: "sticky"
• Multiple servers with multiple workers on each:
strategy: "specialization", + nginx
provides balancing and sticky
• Applied cloud: hardware balancer,
multiple servers with multiple workers,
strategy: "multiple", ØMQ, impress controller

4. Scaling
Load Balancer
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
Impress
Application
Server
HTTP
С2
С1
С3
IPC
C1N1
C1N2
C1N3
C2N1
C2N2
C2N3
C3N1
ØMQ
pub/sub + req/rep
3
С0
Impress Cloud Controller
C3N2

5. Filesystem Structure
Installation:
npm install impress
After that we have:
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
4
Processing steps:
• access.js
• request.js
• get.js, post.js...
• html.template

6. URL Routing
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
5
Features:
• folders are URL-handlers
• handlers and templates inheritance/overriding
• handlers by result type (html, json, csv, xml…)
• serving handlers and templates from memory
• filesystem monitoring and cache refreshing
• files changes consolidation
• multiple handler instances in memory
• URL-rewriting (using regular expressions)
• routing and reverse-proxy

7. Configuration
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
6
• file: config.js
• file system monitoring
• config.js soft reloading
• configuration preprocessing

8. Configuration
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
7

9. Configuration
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
8

10. API Development
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
9

11. API Development
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
10
• RPC API (Stateful, state will store in RAM
between request/response pairs)
• REST API (Stateless, each request/responce
is independent, order is not important,
state is not stored in RAM)
State classification:
• system global state
• session (or connection) state
• user state
• data-object (subject domain) state

12. API Development
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
11

13. Templating
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
12

14. Templating
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
13

15. Static Resources
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
14
• Serves static files directly from RAM
(memory cache)
• File system monitoring and cache refreshing
when file changes
• Cache garbage collection (multiple file buffers)
removes items when deleting files or folders
• Gzip compresion (except small files)
storing gzipped files in RAM
• Implemented HTTP if-modified-since
and HTTP error 304 (Not modified)
• Client JavaScript minification
(using plugin "uglify-js")

16. Events (SSE)
Client1
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
15
Client2
Client3
С1
IPC
C1N1
C1N2
C1N3
…
ClientN

17. Events (SSE)
Client1
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
Client2
Client3
…
ClientN
HTTP/SSE
С2
С1
С3
IPC
C1N1
C1N2
C1N3
C2N1
C2N2
C2N3
C3N1
ØMQ
pub/sub + req/rep
16
С0
Impress Cloud Controller
C3N2

18. DB Access
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
17
• Database drivers are plugins /lib/db.*.js
• Utilities for SQL-compatible DBMS
• Database schema compilation from JSON
• DBMI Web-interface for database management
• MongoDB
• MySQL

19. DB Access / DBMI
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
18

20. Plugins
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
19
• mail plugin (using nodemailer, multiparty)
• geoip plugin (using geoip-lite, optional installation)
• CMS plugin (in development)
• authentication, authorisation and accounting plugin
• npm plugin (optional installation)

21. Contacts and links
Scaling
Filesystem Structure
URL Routing
Configuration
API Development
Templating
Static Resources
Events (SSE)
DB Access
Plugins
20
https://npmjs.org/package/impress
https://github.com/tshemsedinov/impress
http://blog.aumcode.com
http://bit.ly/1cSdTF3 (NFX, AUM, UNISTACK)
mailto:timur.shemsedinov@gmail.com
skype:timur.shemsedinov
npm install impress