Dinache

Dinache is an open source RESTFUL light weight in-memory cache server built on top of node.js and dinoloop.

Why Dinache?

You can quickly setup a cache server via HTTP endpoint by installing a npm package. HTTP and JSON format are supported across variety of programming languages. Nodejs is known for handling millions of concurrent requests with less memory and Javascript objects are key-value pairs which makes Nodejs a perfect choice to build light weight in-memory cache server.

Prerequisites

• Node 8.10.x or higher

Install

npm install dinache

Quickstart

Step 1: Add app.ts (file: app.ts)

import { Dinache } from 'dinache';

// Checks for process.env.PORT and if not found, starts in-memory cache server on default 8080 port.
new Dinache().start();

// Checks for process.env.PORT and if not found, starts in-memory cache server on provided 4200 port.
new Dinache(4200).start();

Step 2: Open your Postman (make a POST request to http://localhost:8080/query")

• GET key

// GET key
{
    query: {
        op: 'GET',
        key: 'key1'
    }
}
// result
{
    query: {
        value: 'YOU_WILL_GET_VALUE'
    }
}

• PUT key

// PUT key
{
    query: {
        op: 'PUT',
        key: 'key1',
        value: 'value1'
    }
}
// result
{
    query: { }
}
// or you receive the following error when you try to put a key which already exists.
{
    query: {
        error: 'KEY_EXISTS'
    }
}

• DELETE key

// DELETE key
{
    query: {
        op: 'DELETE',
        key: 'key1'
    }
}
// result is similar when you try to delete a key that exists or not.
{
    query: { }
}

• UPSERT key

// UPSERT key
{
    query: {
        op: 'UPSERT',
        key: 'key1',
        value: 'value1'
    }
}
// result is similar when you try to upsert a key that exists or not.
{
    query: { }
}

• UPDATE key

// UPDATE key
{
    query: {
        op: 'UPDATE',
        key: 'key1',
        value: 'value1'
    }
}
// result
{
    query: { }
}
// or you receive the following error when you try to update a key which dont exists.
{
    query: {
        error: 'KEY_NOT_EXISTS'
    }
}

• Possible values for op are GET | PUT | UPDATE | UPSERT | DELETE.
• Use UPSERT if you want to update or create.
• Use PUT if you want to create when key not exists.

Batch queries (make a POST request to http://localhost:8080/query")

You can also execute batch queries instead of making subsequent calls to server and reduce round-trips.

// batch-queries
{
    batch: [{
        op: 'GET',
        key: 'key1'
    }, {
        op: 'PUT'
        key: 'key2',
        value: 'value2
    }, {
        op: 'PUT'
        key: 'key2',
        value: 'value2
    }]
}
// result
{
    batch: [{
        value: 'value1'
    }, {

    },{
        error: 'KEY_EXISTS'
    }]
}

License

MIT Licensed.