A NodeJS Server for LokiJS
Sloki is a nodejs server which embed LokiJS, a blazing fast in-memory documents database. Sloki help to make LokiJS scalable : you can now have multiple processes speaking with LokiJS through Sloki.
A possible architecture using sloki :
+----------------------------+ TCP / Binary +-----------------------------------+
| NodeJS app worker #1 |<------------------->| |
+----------------------------+ | Sloki |
| |
+----------------------------+ TCP / Binary | +-------------------------+ |
| NodeJS app worker #2 |<------------------->| | | |
+----------------------------+ | | | |
| | LokiJS | |
+----------------------------+ TCP / JSONRPC | | fast in-memory database | |
| go/php/python/C/whatever |<------------------->| | | |
+----------------------------+ | | | |
| | | |
+----------------------------+ TCP / Binary | +-------------------------+ |
| sloki-cli |<------------------->| |
+----------------------------+ +-----------------------------------+
For moment, only TCP transport is supported. The advantage of TCP vs HTTP API is that the connection is persistent.
By default, Sloki listens on the following ports:
| Port | Transport | TLS | Protocol | ops/sec/client |
|---|---|---|---|---|
| 6370 | TCP | NO | Binary (fastest) | avg 18K ops/sec |
| 6371 | TCP | YES | Binary (fastest) | avg 25K ops/sec (??) |
| 6372 | TCP | NO | JSONRPC | avg 17K ops/sec |
| 6373 | TCP | YES | JSONRPC | avg 24K ops/sec (??) |
If somebody have an idea why TLS is fastest than TCP, i'd like to know .. :)
You will need a client to speak with sloki.
The binary protocol has been made with performance in mind. Payloads looks like JSONRPC, but it's not.
REQUEST | RESPONSE
------------------------------------------- | --------------------------------------
{ | {
"m":"myMethod", | "r":true,
"p":["foo","bar"], | "id":"operation-uniq-id"
"id":"operation-uniq-id" | }
} |
jsonrpc version attribute, method become m, params become p, result become r)The JSONRPC protocol has been chosen for interoperability.
REQUEST | RESPONSE
------------------------------------------- | --------------------------------------
{ | {
"jsonrpc":"2.0", | "jsonrpc":"2.0"
"method":"myMethod", | "result":true,
"params":["foo","bar"], | "id":"operation-uniq-id"
"id":"operation-uniq-id" | }
} |
npm install -g slokislokisloki --helpSee https://github.com/sloki-project/sloki-node-client
The client will load every methods that sloki server have, so, the client documentation is not really usefull
See https://github.com/sloki-project/sloki-benchs
| Icon | Description |
|---|---|
| :heavy_check_mark: | implemented |
| :heavy_plus_sign: | in progress/MUST be implemented |
| :red_circle: | does NOT make sens in sloki, will NOT be implemented |
| :question: | MAY be implemented |
| Status | Transport | Notes |
|---|---|---|
| :heavy_check_mark: | TCP | Persistant connection |
| :heavy_plus_sign: | TLS | Persistant connection |
| :question: | HTTP | |
| :question: | HTTPS |
| Status | Method | Parameter | Description |
|---|---|---|---|
| :heavy_check_mark: | clients | return TCP/TLS connected clients | |
| :heavy_check_mark: | gc | invoke gc(), for testing purpose | |
| :heavy_check_mark: | maxClients | return TCP/TLS maxClients | |
| :heavy_check_mark: | maxClients | maxClients | set TCP/TLS maxClients |
| :heavy_check_mark: | memory | return sloki memory usage | |
| :heavy_check_mark: | methods | return sloki methods | |
| :heavy_check_mark: | quit | disconnect (TCP/TLS clients only) | |
| :heavy_check_mark: | shutdown | shutdown sloki | |
| :heavy_check_mark: | version | return versions (sloki, lokijs, sloki-node-client) | |
| :heavy_check_mark: | wait | wait for one second, for testing purpose |
Loki Class (Database) documentation
| Status | Command | Parameter(s) | Description |
|---|---|---|---|
| :heavy_check_mark: | loadDatabase | databaseName,[options] | select (and load if needed) a database |
| :heavy_check_mark: | db | return current database name (sloki specific) | |
| :heavy_check_mark: | listDatabases | return available databases | |
| :heavy_check_mark: | saveDatabase | trigger manual saving of the selected database | |
| :heavy_check_mark: | listCollections | return available collections in selected database | |
| :heavy_check_mark: | addCollection | options | add a collection in selected database |
| :heavy_check_mark: | getCollection | collectionName | return collection properties in selected database |
| :heavy_plus_sign: | removeCollection | collectionName | removes a collection from the selected database |
| :heavy_plus_sign: | renameCollection | oldName, newName | renames an existing collection in the selected database |
| :question: | clearChanges | clears all the changes in all collections of selected database | |
| :question: | close | close selected database | |
| :question: | configureOptions | options | reconfigure selected database options |
| :question: | copy | options | copy selected database into a new Loky instance |
| :question: | deleteDatabase | delete selected database | |
| :question: | getCollection | collectionName | Retrieves reference to a collection by name |
| :red_circle: | deserializeCollection | see LokiJS Class documentation | |
| :red_circle: | deserializeDestructured | see LokiJS Class documentation | |
| :red_circle: | generateChangesNotification | see LokiJS Class documentation | |
| :red_circle: | loadDatabase | see "use" command | |
| :red_circle: | loadJSON | see LokiJS Class documentation | |
| :red_circle: | loadJSONObject | see LokiJS Class documentation | |
| :red_circle: | serialize | see LokiJS Class documentation | |
| :red_circle: | serializeChanges | see LokiJS Class documentation | |
| :red_circle: | serializeCollection | options | see LokiJS Class documentation |
| :red_circle: | serializeDestructured | options | see LokiJS Class documentation |
| :red_circle: | throttledSaveDrain | see LokiJS Class documentation |
| Status | Command | Parameter(s) | Description |
|---|---|---|---|
| :heavy_check_mark: | find | collectionName, filter | find document(s) |
| :heavy_check_mark: | get | collectionName, lokiId | return a document by his id |
| :heavy_check_mark: | insert | collectionName, document | insert one or more document(s) |
| :heavy_check_mark: | remove | collectionName, document or id | remove one or more document(s) |
| :heavy_check_mark: | update | collectionName, document | update a document |
| Status | Transport | Notes |
|---|---|---|
| :heavy_plus_sign: | TCP | Persistant connection |
| :heavy_plus_sign: | TLS | Persistant connection |
| :question: | HTTP | |
| :question: | HTTPS |
| Status | Tool | Notes |
|---|---|---|
| :heavy_plus_sign: | CLI | CLI using TCP transport |
| Status | Improvement | Notes |
|---|---|---|
| :heavy_plus_sign: | Authentication | Optional authentication layer (all transports) |
$ sloki --help
=======================================================================
Sloki - a NodeJS Server for LokyJS
=======================================================================
Environnement variable Default
SLOKI_TCP_BINARY_ENABLE true
SLOKI_TCP_BINARY_PORT 6370
SLOKI_TCP_BINARY_HOST localhost
SLOKI_TCP_BINARY_MAX_CLIENTS 64
SLOKI_TLS_BINARY_ENABLE true
SLOKI_TLS_BINARY_PORT 6371
SLOKI_TLS_BINARY_HOST localhost
SLOKI_TLS_BINARY_MAX_CLIENTS 64
SLOKI_TCP_JSONRPC_ENABLE true
SLOKI_TCP_JSONRPC_PORT 6372
SLOKI_TCP_JSONRPC_HOST localhost
SLOKI_TCP_JSONRPC_MAX_CLIENTS 64
SLOKI_TLS_JSONRPC_ENABLE true
SLOKI_TLS_JSONRPC_PORT 6373
SLOKI_TLS_JSONRPC_HOST localhost
SLOKI_TLS_JSONRPC_MAX_CLIENTS 64
SLOKI_DIR /home/franck/.sloki
SLOKI_SHOW_OPS_INTERVAL 0
SLOKI_GC_INTERVAL 3600000
SLOKI_MEM_LIMIT 26094 Mb
-----------------------------------------------------------------------
Command Line Options Default
--tcp-binary-enable true
--tcp-binary-port 6370
--tcp-binary-host localhost
--tcp-binary-max-clients 64
--tls-binary-enable true
--tls-binary-port 6371
--tls-binary-host localhost
--tls-binary-max-clients 64
--tcp-jsonrpc-enable true
--tcp-jsonrpc-port 6372
--tcp-jsonrpc-host localhost
--tcp-jsonrpc-max-clients 64
--tls-jsonrpc-enable true
--tls-jsonrpc-port 6373
--tls-jsonrpc-host localhost
--tls-jsonrpc-max-clients 64
--dir /home/franck/.sloki
--show-ops-interval 0
--gc-interval 3600000
--mem-limit 26094 Mb
-----------------------------------------------------------------------
Examples:
$ sloki # will use defaults
$ sloki --tcp-binary-port=6370 --tcp-binary-host=localhost
The default values can be overridden first with those of the environment variables, and then those of the command line options.
SLOKI_DIR /path/to/sloki
dbs contains lokijs databasescerts contains SSL Certificates for TLSSLOKI_MEM_LIMIT
SLOKI_GC_INTERVAL
FAQs
A NodeJS server for LokiJS
The npm package sloki receives a total of 1 weekly downloads. As such, sloki popularity was classified as not popular.
We found that sloki demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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