Chain of Responsibility Bundle
A simple bundle that helps to integrate a chain of responsibility pattern
through Symfony (3.3 and onwards supported). PHP 7.1 is required., (*1)
To install it through composer, you just need to require the
taluu/chain-of-responsibility-bundle package. Other methods (zip, ... and so
on) are supported but you're on your own. :P, (*2)
Howto
To declare a chain of responsibility, each items must implement the
ChainOfResponsibility\LinkInterface interface, declaring a successor (if there
is one). How the object is executed is your concern. :}, (*3)
An AbstractLink is given if you want to just implement a simple Chain of
Responsibility pattern. Just extend it, and just implement the doHandle method., (*4)
Once you have your chained services, all you have to do is specify them in the
bundle's configuration :, (*5)
chain_of_responsibility:
my_first_chain:
- foo_service
- Bar\Baz
# - ...
my_second_chain:
- Bar\Baz
- baz_service
# - ...
# ... and so on
The items are services identifiers, so these should be declared., (*6)
Injecting Chains
In the case you would want to inject the chains, the tip of each chain is
aliased to a chain_of_responsibility.chains.{{ name }} (e.g
chain_of_responsibility.chains.my_first_chain). So use that identifier to
inject the correct chain., (*7)
Tests
Tested through PHPUnit 6. So just run the tests and it should be all green. :}, (*8)
Looking for more ?
Checks out more information on this design pattern ;
- https://en.wikipedia.org/wiki/Chain-of-responsibility_pattern
- https://github.com/domnikl/DesignPatternsPHP/tree/master/Behavioral/ChainOfResponsibilities, (*9)