Hi I would like to learn spring data rest, but It is very confused. Which dependencies I have to add to the pom, as the default (spring-data-rest) How I structure the xml files or the configuration classes. It' s very heavy.
How I create an connection to database, and so on.
SDR documentation needs to be improved and I am sure Spring team are working on that. Having said that the best way to understand most of the SDR is through API docs. Also team lead is maintaining a Restbucks sample app that helps you understand/use various features of SDR
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I've done some research into the subject of response serialization for NestJS/GraphQL. There's some helpful information to be found here, but the documentation seems to be completely focused on a code first approach. My project happens to be taking schema first approach, and from what I've read across a few sources, the option available for a schema-first project would be to implement interceptors for the resolvers, and carry out the serialization there.
Before I run off and start writing these interceptors, my question is this; is there any better options provided by nestjs to implement serialization for a schema first approach?
If it's just transformation of values then an interceptor is a great tool for that. Everything shown for "code-first" should work for "schema-first" in terms of high level ideas of the framework (interceptors, pipes, filters, etc). In fact, once the server is running, there shouldn't be a distinguishable difference between the two approaches, and how they operate. The big thing you'd need to be concerned with is that you won't be easily able to take advantage of class-transformer and class-validator because the original class definitions are created via the gql-codegen, but you can still extend those types and add on the decorators necessary if you choose.
I have some experience with NHibernate and I'm trying to get started with Castle Nhibernate Facilities OR Castle NhibernateIntegration. I'd like to know, where I can find a demonstration project of how to configure and perform transactional control (with attributes) in a service layer (business, class library project)? There is no documentation, and I have a really difficult to find some content to getting started.
I found some samples on the web but only with pieces of code and not the demonstration project... I would like to download something to study. I'm not finding to a complete solution, just the configuration and transactional control in business classes (class library).
Sorry for this kind of thread here, but I do know how to start.
Thank you!
If you want to see an full example of Castle Windsor integrating with nHibernate then I would check out Sharp Architecture
Sharp is an attempt at a 'best practice' template project and utilises a number of tech's (Castle and nHibernate included). While some of the things it does may not be to your taste it will clearly show you one of the ways that it can all fit together.
You may need to go hunting into the source repository on GitHub if you want to see what is going on at a low level as Sharp uses it's own base classes in the template project that are pre-compiled (tho its still open source so you can see what is going on if you want).
It was an invaluable help to me when I was putting my architecture together and I can honestly say that Castle and nHibernate are the way to go, so you are very much on the right track.
EDIT FOR COMMENT 1: Perhaps I am a little confused here. According to the Castle notes
Facilities are main way of extending the container. Using facilities
you can integrate container with external framework, like WCF or
NHibernate, add new capabilities to the container like event wiring,
transaction support... or to components (synchronization, startable
semantics...).
To the best of my knowledge both Castle Nhibernate Facilities and Castle NhibernateIntegration are Facilities and must be based on a container.
If you want to work without a container then you need to use some form of Singleton Factory to manage the SessionFactory. There is an example of this here.
In terms of attributes controlling Transactions then this is how Sharp does it (see here). You may get away with reusing this code and replacing NHibernateSession with your own Singleton like theirs.
You don't need to implement UnitOfWork as nHibernate is effectively doing this for you. What you really need is an architecture that allows you to manage a transaction at a single point of control (Singleton) and is available in every repository.
Looking into Meteor to create a collaborative document editing app, because it’s great that Meteor synchronizes data between multiple clients by default.
But when using a text-area, like in Sameer Kalburgi’s example
http://www.skalb.com/2012/04/16/creating-a-document-sharing-site-with-meteor-js/
http://docshare-tutorial.meteor.com/
the experience is sub-optimal.
I tried to type at the same time with a colleague and my changes would be overwritten when she typed and vice versa. So in the conflict resolution there is no merge algorithm yet, I think?
Is this planned for the feature? Are there ways to implement this currently? Etherpad seems to handle this problem rather well. Having this in Meteor would make creating collaborative document editing apps way more accessible.
So I looked into it some more, the algorithm used in Etherpad is known as Operational Transformation:
The solution is Operational Transformation (OT). If you haven’t heard of it, OT is a class of algorithms that do multi-site realtime concurrency. OT is like realtime git. It works with any amount of lag (from zero to an extended holiday). It lets users make live, concurrent edits with low bandwidth. OT gives you eventual consistency between multiple users without retries, without errors and without any data being overwritten.
Unfortunately, implementing OT sucks. There's a million algorithms with different tradeoffs, mostly trapped in academic papers. The algorithms are really hard and time consuming to implement correctly. We need some good libraries, so any project can just plug in OT if they need it.
Thats’s from the site of sharejs. A node.js based ot server-client that you can hook into your existing client.
OT is also implemented in the Racer model synchronization engine for Node.js, that forms the underpinnings for Derby. At the moment, derby.js doesn’t transparently provide it yet, but they plan too, from the Derby docs:
Currently, Racer defaults to applying all transactions in the order received, i.e. last-writer-wins. (…) Racer [also] supports conflict resolution via a combination of Software Transactional Memory (STM), Operational Transformation (OT), and Diff-match-patch techniques.
These features are not fully implemented yet, but the Racer demos show preliminary examples of STM and OT.
Coincidentally, both the sharejs and derbyjs teams have an ex Google-waver on board. Meteor has an ex etherpad/Google Waver in their core team. Since Etherpad is one of the best known implementations of OT I was imagining Meteor would surely want to support it at some point as well…
I've created a Meteor smart package that integrates ShareJS:
https://github.com/mizzao/meteor-sharejs
It's quite preliminary right now, but you can import it into your app, drop in textareas, and it "just works". Please try it out and submit some new features via pull requests :)
Check out a demo here:
http://documents.meteor.com
What you describe seems out of Meteors scope for me. Its not a tool to set up collaboration possibilities!
What it provides is a way to transparently work against a subset of a servers database. But the implementation of use-case specific merging functionality is the job of the application, not the framework.
Is there anything out there that will generate an mvc rest api easily from existing classes or an existing database? Seems like it wouldn't be that difficult to scaffold out various standard operations.
Have a look at spring roo. It allows you to reverse engineer from a database or even generate the database from entities. You should take into account a somewhat steep learning curve if haven't had any use of spring before.
Is OpenSwing a good framework for developing professional desktop application?
I was recently using the OpenSwing Framework. I can say only the best for the functionalities which are provided with the framework. It is a multitier concept with excelent data binding possibilities. My App uses a small Derby DB in background and I’m managing it with hibernate.
I’m sure, you will be able to advance very fast and provide a working prototype very quick. I would advice you to read the available doc first and to run the provided examples (http://oswing.sourceforge.net/).
However, it has another side which you should be aware of and you will probably notice by yourself if you run the examples. The GridFrame, GridFrameControler, DetailFrame, DetailFrameControler etc classes are not really generic. There are a lot of dependencies bult in and you will have to customize them again and again for every single implementation (can be seen in the demos).
I had another approach, I invested some time in building my own classes which are generic and using the unchanged OpenSwing classes in the background first. Now I’m only setting the properties file where all details are pre-defined. The rest is generic and I don’t have to re-code again and again for every single frame.
I hope this will help.
Regards
I used the openswing in team for more than two years.
It's a pretty nice swing framework for the enterprise development used in the Internal.
It provide great component based by MVP pattern ,such as grid , document ...
If you try it , It's a good article for you about Model-View-Presenter
And try the demo in the source,It's quite good.
The JAllInOne is also a good demo for the framework also made by the mcarniel
and It's a personal project only developed by mcarniel. Thanks mcarniel's great work.