Thang Chung thangchung

Some of the Redis best practices content has moved

This content from this markdown file has moved a new, happier home where it can serve more people. Please check it out : https://docs.microsoft.com/azure/azure-cache-for-redis/cache-best-practices.

NOTE: Client specific guidance listed below is still valid and should still be considered. I will update this document once all content has been moved.

JAVA : 1-4 MB
C++ : 1 MB
Python : 64 KB
Golang : 2-4 KB
Node.js : Single threaded and event driven

In this gist I would like to describe an idea for GraphQL subscriptions. It was inspired by conversations about subscriptions in the GraphQL slack channel and different GH issues, like #89 and #411.

Conceptual Model

At the moment GraphQL allows 2 types of queries:

query
mutation

Reference implementation also adds the third type: subscription. It does not have any semantics yet, so here I would like to propose one possible semantics interpretation and the reasoning behind it.

From You're not actually building microservices

So, are you building microservices? Take a look at a few of these symptoms, and decide for yourself:

❌ A change to one microservice often requires changes to other microservices
✅ Deploying one microservice requires other microservices to be deployed at the same time
❓ Your microservices are overly chatty
❌ The same developers work across a large number of microservices
✅ Many of your microservices share a datastore
✅ Your microservices share a lot of the same code or models

Used M1 Mac mini 2020 with macOS Big Sur Version 11.5.2.

1. Install Patched QEMU

According to the GitHub issue comment in Lima's GitHub repository, Lima requires a patched QEMU on M1 Macs.

Note that the followings are customized steps by @toricls based on the original steps and the script. Be sure to check the original files when you try it on your own.

Install QEMU on Silicon based Apple Macs

How to create an HTTPS certificate for localhost domains

This focuses on generating the certificates for loading local virtual hosts hosted on your computer, for development only.

Do not use self-signed certificates in production ! For online certificates, use Let's Encrypt instead (tutorial).

Hexagonal Architecture

Conceptualized by Alistair Cockburn. Also known as "Ports and Adapters".

In a nutshell:

Application Driver -> Primary Adapter -> Primary Port -> Use Case -> Secondary Port -> Secondary Adapter -> External System/Side Effect

Information in this Gist originally from this github issue, which is outdated.

As @RomanMinkin mentioned, you can also consider Casbin (https://github.com/casbin/casbin). It is the most starred authorization library in Golang. There are several differences between Casbin and OPA.

Feature	Casbin	OPA
Library or service?	Library/Service	Library/Service
How to write policy?	Two parts: model and policy. Model is general authorization logic. Policy is concrete policy rule.	A single part: Rego
RBAC hierarchy	Casbin supports role hierarchy (a role can have a sub-role)	Role hierarchies can be encoded in data. Also with the new `graph.reachable()` built-in function queries over those hierarchies are much more feasible now.
RBAC separation of duties	Not supported	Supported: two roles cannot be assigned together

How to update the Go version

System: Debian/Ubuntu/Fedora. Might work for others as well.

1. Uninstall the exisiting version

As mentioned here, to update a go version you will first need to uninstall the original version.

To uninstall, delete the /usr/local/go directory by:

	public class CachePipelineBehavior<TRequest, TResponse> : IPipelineBehavior<TRequest, TResponse>
	{
	private readonly IDistributedCache cache;
	private readonly ILogger<SGUKAspNetCore> logger;

	public CachePipelineBehavior(
	IDistributedCache cache,
	ILogger<SGUKAspNetCore> logger)
	{
	Ensure.Argument.NotNull(cache, nameof(cache));