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Questions tagged [chain-of-responsibility]

Design pattern consisting of a source of command objects and a series of processing objects. One of the Gang of Four's behavioral design patterns.

Design pattern consisting of a source of command objects and a series of processing objects. Each processing object contains logic that defines the types of command objects that it can handle; the rest are passed to the next processing object in the chain. A mechanism also exists for adding new processing objects to the end of this chain.

This is one of the Gang of Four's behavioral , first published in Gamma et al.'s book "Design Patterns: Elements of Reusable Object-Oriented Software".

More information is available on Wikipedia.

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Java Generics: chaining together generic function object

I've been struggling with the following problem. I have a series of function objects, each with it's own input and output types defined via generic type arguments in java. I would like to arrange these in a chain so that raw data is input to the…
downer
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Design pattern for replacing nested if statements (arrow anti-pattern)

I noticed my code looks really ugly, and is hard to maintain. Basically I need do to some person check. Pseudo code is like this (BTW I can't "cut" anything in query, and it's not really the point of my question): List persons =…
Nikola
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Would this be a pipeline, a chain of responsibility, or something else?

I'm building a multiprocess architecture that seems to be a strange meld of a pipeline and a chain of responsibility. Essentially, I have a chain of handlers linked up by queues. Each handler will receive an object that represents the input data,…
Jason Baker
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The Chain of Responsibility Pattern

Could somebody provide a simple explanation of the chain of responsibility pattern? I found the wiki article a bit confusing.
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Chain of Responsibility - pass the request through all the chains

I browsed the web but I couldn't find an answer to my question... Lets say I have 3 chains. I want the request to pass all 3 chains (it doesn't matter if the chain can handle the request or not). Is it possible to use CoR pattern for this problem?…
mirta
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How to implement Chain of Responsibility in a testable fashion?

I'd like to implement a Chain of Responsibility pattern, taking care of the 'broken link' problem as follows: public abstract class Handler{ private Handler m_successor; public void setSuccessor(Handler successor) { m_successor =…
FatLlama
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Chain of responsibility using Func

I'm creating a chain of responsibility pipeline using System.Func where each function in the pipeline holds a reference to the next. When building the pipeline, I'm unable to pass the inner function by reference as it throws a…
Ben Foster
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Implementing Chain of responsibility pattern in python using coroutines

I am exploring different concepts in python and I happened to read upon an example of coroutines which can be used for the chain of responsibility design pattern. I wrote the following code: from functools import wraps def coroutine(function): …
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C# Chain-of-responsibility with delegates

For my understanding purpose i have implemented Chain-Of-Responsibility pattern. //Abstract Base Type public abstract class CustomerServiceDesk { protected CustomerServiceDesk _nextHandler; public abstract void ServeCustomers(Customer…
user274364
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Executing Chain of Responsibility variation

I have got a pipeline of tasks which basically is a variation of chain of responsibility pattern. A task in my pipeline looks as below internal interface IPTask { bool CanExecute(T instance); T Process(T instance); } ..and my processor…
Mike
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How do I declare a chain of responsibility using decorators in Ninject?

I'd like to declare a chain of responsibility using decorators in Ninject. Has anyone done that before? Thanks.
Adriano Machado
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Is the Chain of Responsibility pattern a good replacement for a sequence of conditions?

When you need to execute a sequence of actions in a particular order, is the Chain of Responsibility pattern a good replacement for a sequence of conditions? Is it a good idea to replace a simple method with conditions like this: public class…
Ondrej Sotolar
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Kotlin chain of responsibility pattern with generics

Using the chain of responsibility pattern I ran into a problem where next chain element was expected to have the same generic type of the first element. I know why this happens: The first handler expects the second handler to use the generic type…
keyboardsamurai
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How do I generalize calling a list of functions in C++?

I have the following code which allows me to instantiate and then call a list of void() functions. (I am using https://github.com/philsquared/Catch for unit testing if you wish to compile and run this code). #include "catch.hpp" #include…
spierepf
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Chain of Responsibility vs Commands in a queue or stack

Why I need to use Chain of responsibility, if I could load all commands into some container and just execute commands one by one. This will make a chain of processing a request in a row. BTW I feel that it is better than CoR because you can remove…
Narek
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