impress application server for node.js (en)

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

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

Scaling

ScalingFilesystem StructureURL RoutingConfigurationAPI DevelopmentTemplatingStatic ResourcesEvents (SSE)DB AccessPlugins

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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

Scaling


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Scaling


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Load Balancer

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Impress Cloud Controller

Impress Application Server

IPC

HTTP

ØMQpub/sub + req/rep

Installation:npm install impressAfter that we have:

Filesystem Structure


4Processing steps:• access.js• request.js• get.js, post.js...• html.template

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

URL Routing


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Configuration


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• file: config.js• file system monitoring• config.js soft reloading• configuration preprocessing

Configuration


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Configuration


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API Development


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API Development


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• 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

API Development


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Templating


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Templating

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Static Resources

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• 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")

Events (SSE)

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IPC

Client1 Client2 Client3 ClientN…

Events (SSE)

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Impress Cloud Controller

IPC

HTTP/SSE

ØMQpub/sub + req/rep

Client1 Client2 Client3 ClientN…

DB Access

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• 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

DB Access / DBMI

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Plugins

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• 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)

Contacts and links

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https://npmjs.org/package/impresshttps://github.com/tshemsedinov/impresshttp://blog.aumcode.comhttp://bit.ly/1cSdTF3 (NFX, AUM, UNISTACK)

mailto:[email protected]:timur.shemsedinov

npm install impress С3

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impress application server for node.js (en)

Education

static files

applied development

urlhandlers handlers

multiple workers cluster

multiple ports

multiple protocols

memory filesystem monitoring

memory urlrewriting