Compound

Let's do tasks asynchronously and sequentially

A problem what I want to solve

To be honest, sometimes I had written codes like this.

task1.doTask = {
    
    task2.doTask = {
        
        task3.doTask = {
        
        }
    }
}

As you can see, this code have some problems.

• It's messy. This code can be longer and the indentions are so complicated.
• Not maintainable and hard to reuse blocks.

The Goal

• Write codes for asynchronous and sequential tasks easily
• Easy to reuse and maintainable
• Easy to test a task

Examples

let queue = RequestQueue { (queue, error) in
    //  All tasks completed
}
        
let requestA = Request()
let requestB = Request()
let requestC = Request()

requestA.task = {
    //  Write your first task code.
    $0.finish()
}

requestB.task = {
    //  Write your second task code.
    $0.finish()
}

requestC.task = {
    //  Write your third task code.
    $0.finish()
}

queue.addOperations([requestA, requestB, requestC])

Technologies

• Operation
• OperationQueue