iluwatar / java-design-patterns Goto Github PK

https://en.wikipedia.org/wiki/Proactor_pattern

https://en.wikipedia.org/wiki/Active_object

hello iluwatar

when I read the Singleton pattern ,the ThreadSafeLazyLoadedIvoryTower class use the default constructor method ,you don't specify it ，should it right ?
I think must add a private constructor as the IvoryTower class.
is it right?

https://en.wikipedia.org/wiki/Multilayered_architecture

Can you tell me the UML diagram is used what software to draw?

hey,I see a file ends with ucls in some package,I open it and find it is an xml format file
and my question is what kind of soft you draw it
Thanks!

Add the "real" project(or link to good project) where the most of patterns will be represented.And fully documented.To see how they used in real life.For example text editor.Or something else.

https://en.wikipedia.org/wiki/Guarded_suspension

http://www.hillside.net/plop/plop2002/final/plop2002_ecrahen0_0.pdf

https://en.wikipedia.org/wiki/Reactor_pattern

• FilterChain executes the filters sequentially using an array. This should be changed so that the filters form a chain and call each other instead. Like in Chain of Responsibility.
• At the same time the feedback mechanism from the filters should be improved. This should be implemented with Collecting Parameter idiom. It should be possible to return multiple errors from the filter chain. The current implementation can handle only one.
• The data passed to the filters should be transformed into value object from string array. This way we can get rid of magic numbers (array index) in filters.

Hello, may I ask you what software tool to draw a class diagram?

I want to get it.

Can you send it to my email ? Or tell me what its name . Thank you very much!

My email : [email protected]

http://blog.8thlight.com/uncle-bob/2012/08/13/the-clean-architecture.html

Hi @iluwatar ,

First of all, thank you for this comprehensive repo! I haven't seen the dao design pattern among the rest. So, I am just wondering whether it is actually part of the design solutions or not.

https://en.wikipedia.org/wiki/Front_Controller_pattern

It is recommended to implement null object as a singleton.

In the example, NullNode (https://github.com/iluwatar/java-design-patterns/blob/master/null-object/src/main/java/com/iluwatar/NullNode.java) is not a singleton.

We could use this: https://github.com/trautonen/coveralls-maven-plugin

http://www.dossier-andreas.net/software_architecture/ports_and_adapters.html

https://en.wikipedia.org/wiki/Balking_pattern

https://en.wikipedia.org/wiki/Join-pattern

Removed a redundant word and added an Acronym.

@llitfkitfk You made ALL the diagrams link to files from your FORK. The BASE readme is pointing to files from a FORK.

commit hash is 97431a62af9881fa046b69b690e72d4fb4777209

https://en.wikipedia.org/wiki/Lock_(computer_science)

https://en.wikipedia.org/wiki/Thread-local_storage

How about making startMemento an inner class of Start class?

Is it possible that we add web application and database patterns here as well? By web application patterns, I mean

1. Single Thread pattern
2. Synchronization pattern in MVC
3. Double checked locking
4. Service locator
5. Facade
   ..... (any more that we can think of)

and the database patterns I had the data access (DAO) pattern in mind.

http://www.objectmentor.com/resources/articles/SingletonAndMonostate.pdf
http://c2.com/cgi/wiki?MonostatePattern

https://en.wikipedia.org/wiki/Asynchronous_method_invocation

https://code.google.com/p/pipelinepattern/

https://en.wikipedia.org/wiki/Monitor_(synchronization)

https://en.wikipedia.org/wiki/Readers%E2%80%93writer_lock

First, I'd like to thank you for providing the examples, really great job! However, I'd like more practical explanations since currently they are rather theoretical and hard to understand, don't you think?

For example the Builder pattern, I've read the explanation and honestly do not know when to use in my daily work. Wouldn't it be better just to write that you use it if you have few required and many optional construction parameters?

http://www.oracle.com/technetwork/java/businessdelegate-137562.html

http://download.microsoft.com/download/B/B/6/BB69622C-AB5D-4D5F-9A12-B81B952C1169/CloudDesignPatternsBook-PDF.pdf

Great job.
How about repository?
Reference: http://martinfowler.com/eaaCatalog/repository.html

https://en.wikipedia.org/wiki/Scheduler_pattern

http://microservices.io/patterns/index.html

http://martinfowler.com/bliki/ParallelChange.html

https://en.wikipedia.org/wiki/Module_pattern

https://en.wikipedia.org/wiki/Messaging_pattern

Hi, I'm a new user to github and I would like to help to this project. I've been researching about a few patterns and the work you've done and I think it's so cool.

In my college I've developed an application which comunicates with a MySQL Database and I had to build a pattern to make that communication work. I'm talking about the Abstract Mapper.

I have an example here: https://github.com/jesusvazquez/java_examples/tree/master/AdvancedDatabaseSystems/src/modelo/DBMapper

I'm wondering if it would be a good idea to add this pattern to your project.

Best Regards.

https://en.wikipedia.org/wiki/Model_View_ViewModel

https://en.wikipedia.org/wiki/Active_record_pattern

http://www.ssw.uni-linz.ac.at/Research/Papers/Moe99/Paper.pdf

There's a new (I think) pattern called the Virtual field pattern, introduced in Java 8. https://kerflyn.wordpress.com/2012/07/09/java-8-now-you-have-mixins/ Scroll half way through till you find "Another Approach".

http://c2.com/cgi/wiki?BindingProperties

I was reading the code and then I wondered why was used the NullPointerException in that case, won't be more readable throw a custom exception? I mean create something like BuilderException and then this can be treated in the caller method ...
*Line 97,98 from HeroBuilder.java for reference

Heya there,
first of all, i love this resource and use it quite often. the only thing slightly annoying is the layout. Would be really awesome to view this resource in bootstrap with categories or something like that.

If something like that is done "hardcoded" the project will probably loose on contributions, so a converter of sorts should be used.

One last point, i found this Site that looks pretty good, but i dont know if it would be suitable. I also have no idea if it even works, because here everything is one single markdown document, while those at the site are multiple.
http://phpmyadmin.readthedocs.org/en/QA_4_4/
(topic is not important)

Just an idea C:

~Markus