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Anurag Agarwal 31f27a720b Resolves checkstyle errors for callback, chain, circuit-breaker (#1060) 
* Reduces checkstyle errors in callback

* Reduces checkstyle errors in chain

* Reduces checkstyle errors in circuit-breaker
2019-11-09 21:27:14 +02:00
..
etc
#190 Remove urm plugin
2017-11-28 20:55:52 +02:00
src
Resolves checkstyle errors for callback, chain, circuit-breaker (#1060)
2019-11-09 21:27:14 +02:00
pom.xml
Update license headers
2019-10-12 20:05:54 +03:00
README.md
#190 Remove pumlids from readmes
2017-11-28 21:28:53 +02:00

README.md

layout, title, folder, permalink, categories, tags
layout title folder permalink categories tags
pattern Callback callback /patterns/callback/ Other
Java
Difficulty-Beginner
Functional
Idiom

Intent

Callback is a piece of executable code that is passed as an argument to other code, which is expected to call back (execute) the argument at some convenient time.

alt text

Applicability

Use the Callback pattern when

  • when some arbitrary synchronous or asynchronous action must be performed after execution of some defined activity.

Real world examples

  • CyclicBarrier constructor can accept callback that will be triggered every time when barrier is tripped.