coc concept notes

 

what is COC?

ANS:

-> COC stands for chain of command.

-> CoC allows us to customize standard classes without using event handlers.

-> COC allows us to add custom logic that will run before and/or after the standard code runs.

-> We can only extend the logic of public and protected methods.

-> It is important to understand this concept, as base code cannot be changed in Dynamics           365 finance and operations apps development.

-> When no more methods exist in the chain, the original (in other words, extended) method       is called.

[ExtensionOf(classStr(BusinessLogic1))]  //name of the base class

final class BusinessLogic1_Extension  //final keyword followed by class followed by baseobjectname _Extension

{ 

    str doSomething(int arg) 

    {

        // Part 1  // the logic which we write before next method will get execute first

       //We are required to use the next keyword to create a CoC. The next command will call the next method in the Chain of Command

        // Custom logic before standard code.

             var s = next doSomething(arg);

// Custom logic after standard code.

       

        return s;

    }

}


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