LocDB

LocDB is a local in-memory database module for NodeJS. It stores data in json files. LocDB is more reliable than you would think, since it does not constantly read from the json files, it only does that once you initialize the module, after that it is stored in memory and only written to the json files when updated.

Installation

Use the package manager npm to install LocDB.

npm i locdb

Usage

initialize the module

var Locdb = require('locdb');
var database = new LocDB('/path/to/directory');

retrieve, define or update and remove data.

//Your data is stored as an Object or Array (based on what you stored in your json file.), so you can treat it just like any javascript Array or Object.
//All databases are stored within .db

console.log(database.db.databaseName.someKey); //undefined

database.db.databaseName.someKey = 'value';
console.log(database.db.databaseName.someKey); //'value'

database.db.databaseName.someKey = 'otherValue';
console.log(database.db.databaseName.someKey); //'otherValue'

remove database.db.databaseName.someKey;
console.log(database.db.databaseName.someKey); //undefined

setUpdateInterval(Number: interval): Change the interval (milliseconds) in which the json files are update for changes. Default is 500ms. (half a second)

database.setUpdateInterval(500);

exists(String: db, [OPTIONAL] Boolean: file): Check if a database is registered or if the JSON file for the database exists.

//db is registered and file exists.
database.exists('databaseName') //true
database.exists('databaseName', true) //true

//db is registered but file is missing.
database.exists('databaseName') //true
database.exists('databaseName', true) //false

//db is note registered but file exists.
database.exists('databaseName') //false
database.exists('databaseName', true) //true

//db is not registered and file is missing.
database.exists('databaseName') //false
database.exists('databaseName', true) //false

register(String: db): Register a new database. If a JSON file for the database already exists, it won't be overwritten.

database.register('otherDatabase'); //won't return anything.

purge(String: db): Removes a database, you will have to make a backup yourself.

database.purge('otherDatabase'); //won't return anything.

log(String: msg): system function, puts out a message in the console and log file.

database.log('Log message');

config.json: stores configuration and a list of databases.

{
    "updateInterval": 500,
    "list": [
        "example"
    ]
}

Directory structure:

database_directory/
├───files
│   └───example.json
├───logs
│   └───date.locdb.log
└───config.json

Contributing

If you want to make an addition to the project, please make a pull request or for major changes, open an issue.

License

MPL-2.0