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daniel-bryla 0a427710bb Merge branch 'master' of https://github.com/iluwatar/java-design-patterns 
* 'master' of https://github.com/iluwatar/java-design-patterns: (27 commits)
  Remove use of coveralls-maven-plugin (sonarqube.com covers this)
  Add SonarQube.com badge
  Fix environment variable
  Add Travis instructions for SonarQube.com analysis
  Adds more criticism to Singleton pattern.
  Event Based Asynchronous pattern: Add missing license header and puml diagram
  Changed config to non-interactive
  Moved config into a separate dir
  Unused import removed.
  End process logic clause has been corrected.
  Caching pattern: Documentation and diagram
  Fixes #437. Adds criticism to Singleton pattern.
  Alter JUnit tests to run in lesser time.
  Updated version snapshot to 1.14.0
  Changes based on review feedback.
  Closes #436. Adds criticism to service locator pattern.
  Caching pattern: Implementation of Cache-Aside pattern
  Caching pattern: Style fix for null check
  Caching pattern: Refactor LRU cache to avoid NPE and unnecessary cache lookup
  Caching pattern: Refactor shutdown hook to use method reference
  ...
2016-11-04 11:51:45 +01:00
..
etc
UML generation: Mark the urm-maven-plugin execution to be ignored in Eclipse and recreate all .puml files
2016-09-18 17:51:09 +03:00
src
Merge branch 'master' of https://github.com/iluwatar/java-design-patterns
2016-11-04 11:51:45 +01:00
pom.xml
Set version number for next development iteration
2016-09-30 19:40:28 +03:00
README.md
Work on #190: Commit initial pumlId's added by the script
2016-08-30 15:10:34 +02:00

README.md

layout, title, folder, permalink, pumlid, categories, tags
layout title folder permalink pumlid categories tags
pattern Async Method Invocation async-method-invocation /patterns/async-method-invocation/ TSdB3SCW303GLTe1mFTkunWhk0A3_4dKxTi5UdlIUuhIoCPfuz4Zjhy03EzwIlGyqjbeQR16fJL1HjuOQF362qjZbrFBnWWsTPZeFm3wHwbCZhvQ4RqMOSXIuA1_LzDctJd75m00 Concurrency
Java
Difficulty-Intermediate
Functional
Reactive

Intent

Asynchronous method invocation is pattern where the calling thread is not blocked while waiting results of tasks. The pattern provides parallel processing of multiple independent tasks and retrieving the results via callbacks or waiting until everything is done.

alt text

Applicability

Use async method invocation pattern when

  • you have multiple independent tasks that can run in parallel
  • you need to improve the performance of a group of sequential tasks
  • you have limited amount of processing capacity or long running tasks and the caller should not wait the tasks to be ready

Real world examples