afifmohammed

Asynchronous Command Dispatch

Scenario

Imagine a Checkout Service (producer) asking an Order Fulfilment Service (consumer) to ship an order.
It does not need to wait for the Order to be shipped; only assurance the fulfilment service will process the request.

Here producer means “producer of the async request”
And consumer as "consumer of the async request".

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afifmohammed

AzureServiceBus vs. EventHub

ASB has been around for a while and is a familiar tool for inter service eventing using publish subscribe. This document outlines

1. Where ASB is good at.
2. What are the primary constraints it introduces.
3. How EH addresses this by design and how to address the trade-offs with EH.

And draws the conclusion to what scenarios are best suited to EH vs ASB.

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afifmohammed

create schema infra;

-- @formatter:off
drop function if exists infra.restore_dependencies(
  p_view_schema name,
  p_view_name name,
  p_options jsonb
);

drop function if exists infra.save_and_drop_dependencies(

afifmohammed

using System;

namespace Juliet
{
    class Program
    {
        static void Main(string[] args)
        {
            Union3<int, char, string>[] unions = new Union3<int,char,string>[]
                {

afifmohammed

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program

afifmohammed

/*
Modified from the original https://gist.github.com/louthy/524fbe8965d3a2aae1b576cdd8e971e4

- removed dependency on [language-ext](https://github.com/louthy/language-ext)
- separated monadic boilerplate, so you may concentrate on describing the operations and interpretation of the program
- removed `IO<A>.Faulted` to simplify the examples. It can be added back in straightforward manner.
 
Useful links:
- [John DeGoes: Beyond Free Monads - λC Winter Retreat 2017](https://www.youtube.com/watch?v=A-lmrvsUi2Y)
- [Free and tagless compared - how not to commit to a monad too early](https://softwaremill.com/free-tagless-compared-how-not-to-commit-to-monad-too-early)

afifmohammed

//
// See https://github.com/louthy/language-ext
// 

using System;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using LanguageExt;
using static LanguageExt.Prelude;

afifmohammed

void Main()
{
  var events = new Event[] 
  {
    new ItemAddedToCart(lead:"1", cart:"2", product:"44", title:"products/44/title/iphone-6s", when:DateTimeOffset.Now),
    new ItemAddedToCart(lead:"1", cart:"2", product:"4", title:"products/4/title/iphone-5-SE", when:DateTimeOffset.Now),    
    new ItemRemovedFromCart(lead:"1", cart:"2", product:"44", when:DateTimeOffset.Now),
    new OrderPlaced(customer:"1", order:"2", when:DateTimeOffset.Now.AddSeconds(123)),  
    new ItemShipped(order:"2", sku:"4", trackingid:"orders/2/skus/4/track/12", when:DateTimeOffset.Now.AddMinutes(33)),
    new ItemAddedToCart(lead:"12", cart:"22", product:"42", title:"products/42/title/iphone-6s-plus", when:DateTimeOffset.Now.AddSeconds(12)),

afifmohammed

void Main()
{
	var id = new Id();
	Func<Id, Customer> customerById = x => new Customer();
	Func<Criteria, CreditHistory> creditHistoryByCriteria = x => new CreditHistory();
	Func<Report, Unit> print = x => new Unit();
	
	var history = GetCustomer(id)
		.Map(GetCustomerCreditHistory)
		.Uncurry()

afifmohammed

Some Tips for Raising Muslim Children by Mufti Ismail Menk

1. Praise your child, even if they get 4/10 in an exam, praise your child in front of others.

2. Never make your child feel that he or she is useless. Never favour one child over the other.

3. Every time you speak with your children, speak with respect, say “Jazakallahu khair ”, etc. Don’t use slang such as ‘gimme’, instead say ‘please give me’; use clear words, be polite and never swear.

4. You need to bear in mind when your child is young that he or she is just a child, don’t take away their playing time by treating them like adults. If you do this, they will rebel in life.