The high level design and description of software systems frequently characterized by having large quantities of persistent data that is accessed concurrently.

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936 views

have we come full circle with microservices, back to very old school approaches?

In terms of software architecture and design, how do microservices "stack up" (pun intended) against middleware? I'm coming from Java, and it seems like as you move away from straight REST as an API, ...
3
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3answers
2k views

storing and retrieving millions of documents using c#

I am working on an integration project, where my “app/web service” will sit in the middle serving documents. Basically, a request is sent with the document id as part of the query string, I check if ...
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2answers
1k views

Handling multiple clients using single application

We are developing an ERP web application using Vaadin framework where each of the potential client companies will have their own data and file storage. Current implementation only allows having one ...
3
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1answer
466 views

What is one correct architecture when using a DB with multiple clients?

We have a legacy system with data stored in a SQL database. Several clients connects to this database using a web service. The web service expose a lot of "commands" to query the database and to "do" ...
3
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1answer
3k views

What are the most commonly used enterprise Java technologies, and what would you want a non technical audience to understand about them?

I have been asked to give a presentation to a non-technical audience on what Java technologies are currently being used in the enterprise world. The goal is to give this non-technical audience the ...
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1answer
110 views

Handling ground-breaking changes in a production system - Insert intermediate level Management object

As our client request, we are proceeding to change the base of our system. We already have the following structure: A class has many students. (simple typical one - to - many) Now we must change ...
3
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1answer
329 views

Single source of truth within an enterprise distributed system

Within an enterprise distributed system I have many services - an ecommerce service, a CRM, support desk, finance, billing. Many of these services share common data, such as Customer data. These ...
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2answers
313 views

Does DDD make sense for apps which mostly present data?

I'm responsible for designing a dashboard and data manipulation front-end for a sale transaction database and am not quite sure what type of architecture to use. The database is populated by an ...
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2answers
608 views

Design Pattern for enterprise application

I read few articles about composite pattern and I want to know whether its applicable in following situation, I found that "A Composite Entity object can represent a coarse-grained object and all its ...
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1answer
1k views

When using Java Persistence API (JPA), which layer owns the entities?

When working with annotations on entities in JPA, do these entities belong to the model layer or the persistence layer? Does there have to be some kind of clone of the entities (simple JavaBeans) in ...
3
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2answers
64 views

How do you address the problem of dealing with an external service that stores your data and you want to keep in sync?

I'm integrating an enterprise application with an existing pattern. The main problem is how to synchronize data between my system and an external system through RPC (HTTP API calls to be precise). ...
3
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1answer
63 views

How do you properly test a complete software replacement

We have System A (an application and a database) that is built for a specific business department and therefore has business aligned data model and table structure. System A is a mission critical ...
3
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1answer
177 views

What are modern develop-deploy-test techniques for non-interpreted languages?

I have strong web-developer background, where in order to show client a demo I've uploaded a solution to demo environment and sent over a link. If case client asked to make changes, I did them in ...
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2answers
1k views

Best practice refactor n-tier into vertical slices architecture

What work path do there exist to identify reasonable vertical slices of a classic n-tier platform code base and infrastructure (enterprise size)? Regardles of refactor or a new solution I think there ...
3
votes
1answer
354 views

Should I use a single platform for common services or modularize them?

I am designing a suite of web applications that have the same base functionality. That is, they all will know how to create and operate on widgets. The differences will be in their target audience and ...
3
votes
1answer
82 views

Simple messaging pattern to replace shared DB? [closed]

There are two modules A and B using the same DB. A imports B as a JAR. I read that messaging patterns can replace the tightly coupled solution of using a shared DB but I am not sure which message ...
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4answers
2k views

Switch interface implementation using configuration [closed]

We want to allow the same core service to be either fully implemented or, as other option, to be a proxy toward a client legacy system (via a WSDL for example). In that way, we have both ...
2
votes
3answers
92 views

What should be primary guideline when defining a bounded context?

When defining bounded contexts of a Domain, what should be a primary guideline: departments (Sales/Manufacturing/Warehousing), where each department has a common context (http://programmers....
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2answers
60 views

How to ensure the success of processes after a deadlock exception occurs?

No matter the programming language is and whatever the database is, the concept should be the same: I have 2 threads, each locking some database entities and inserting new data in database. Let's ...
2
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2answers
312 views

Using ESB for database synchronisation / replication

We're starting to look at implementing an ESB / Microservices architecture. I (think) I know about the concepts, but there's one thing I don't seem to be able to get a good idea about: data ...
2
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4answers
390 views

How to optimize the application with huge number of database requests per minute

I have to provide free demo of some service to end users in my application. Free demo could be of 30 mins, 1 hours, 5 hours etc. (predefined time) for a new user for one time only. User can also ...
2
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1answer
1k views

Communication between Multiple Presenters in MVP

I'm designing an application using the MVP pattern, but a few of the edge cases for the system rely on communication between multiple presenters. View 1 calls Presenter 1 which does Operation A ...
2
votes
1answer
4k views

Should I use a workflow engine?

I need to add some new features to a PHP application. It is to follow the steps of a order. A process create some orders, the order goes to confirmation, then if approved is sent to a provider, later ...
2
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1answer
287 views

How to approach legacy code? Desperate case [duplicate]

I have a methodological question. I am faced with a reasonably large legacy system (Java Enterprise). I am new to its codebase -as everybody in the team- since it's a product we had in outsourcing ...
2
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1answer
493 views

How to manage security of these self hosted web apis, to ensure that the request coming for accessing data is authenticated?

Let's pretend I am going to work on an enterprise application. Say I have 11 modules in the application and I would have to develop Dashboards for every role in the organization for whom I are going ...
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1answer
298 views

Data Transformation Pipeline

I have create some kind of data pipeline to transform coordinate data into more useful information. Here is the shell of pipeline: public class PositionPipeline { protected List<...
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2answers
192 views

Principles of an extensible data proxy

There is a growing industry now with more than 30 companies playing in the Backend-As-A-Service (BaaS) market. The principle is simple: give companies a secure way of exposing data housed on premises ...
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2answers
4k views

What is a best practice tier structure of a Java EE 6/7 application?

I was attempting to find a best practice for modeling the tiers in a Java EE application yesterday and couldn't come up with anything current. In the past, say java 1.4, it was four tiers: ...
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1answer
347 views

Silverlight - modularity. Best way to physically separate binaries?

We are working on LoB app with lot's of content. XAP download will be rather large I think for one time download. I'm planning to break solution into separate projects. Not sure why - but I DO NOT ...
2
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1answer
191 views

Benefits of integration platform

We are looking at introducing an integration platform. In the begining it is an extra layer and an extra cost. But after a while the service that a new system needs will be available on the ...
2
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1answer
165 views

Enterprise Architecture: Where to put persistence/dbContext management? [closed]

I'm working on architecting a somewhat enterprise-level solution and have a question about how to best handle the persistence details. My overall setup is that there's a core set of business logic/...
2
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3answers
158 views

Performing data operations that involve separate applications and data sources

I'm designing an enterprise application that produces output based on some input data from another application. In this case, I happen to have also built and thus do control the source application ...
2
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3answers
234 views

Enterprise application object oriented modeling for user and role

Generally in the Enterprise Applications like ERP or ERM, CRM, BP etc. we see two things a lot, one of them is Role and the other one is User. What happens is that in the real world we have some ...
2
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1answer
1k views

How to design extension mechanism for java app

I have an application where I have a set of core features. The application itself HAS to work in core only mode. I would also want to make the application extensible such that, when certain jar/...
2
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1answer
187 views

DDD: How to reconcile a BoundedContext with REST/WebService DTO's?

I'm just starting to learn about DDD, and I'm trying to understand how Bounded Contexts can be reconciled with client facing API's like REST/WebServices that use DTO's. For example: your system ...
2
votes
1answer
6k views

Layered architecture using Entity Framework with different class libraries

Our business requirements required to create a layered and modular architecture. So I designed an architecture to make it as decoupled and as modular as possible. I will list my layers below ASP ....
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0answers
19 views

Implementing workflow to an enterprise application

We are a few developers develoing an enterprise project includes several modules and approximately 200 UI resources for our company. Project will be written/programmed in Asp.NET MVC, WCF services for ...
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4answers
560 views

Database design for objects with multiple states

Context I'm designing a database which, simplified, should be able to handle users sending job requests to each other, and after that a job can be started, finished, and reviewed. The design should ...
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1answer
291 views

Why are JOINS deprecated for a in-memory database?

Correct me if I'm misunderstanding. Refer to the following sentence: Stack Overflow copied a key part of the Wikipedia database design. This turned out to be a mistake which will need massive ...
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3answers
80 views

Alternatives on how to deal with data fetched from external API

We are planning to build a web application which will consume data from an internal REST API that centralizes all of our "core" business data. For matter of demonstration, let's say this API exposes ...
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3answers
322 views

How to authenticate against an API?

In a enterprise distributed system, a user of a web portal can sign into one site, be redirected to a federation provider. Once they log in with, for example, a facebook account, that user is ...
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2answers
98 views

Decoupling external dependencies

We have a simple REST webapp which is dependent on multiple external services, mostly Kafka messages. An attempt was made to isolate external dependencies by encapsulating all external interactions in ...
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4answers
2k views

Use JSON objects or POJOs in back end service?

I'm building a back end service for mobile clients. The requirement is that the mobile clients will pass me a token, I'll use that token to talk to other systems (behind the company firewall) in my ...
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2answers
182 views

Architecture advice for converting biz app from old school to new school?

I've got a WinForms business application that evolved over the past few years. It's forms over data with a number custom UI experiences taylored to the business, so I don't think it's a candidate to ...
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2answers
950 views

What is the Enterprise Architecture Pattern called for a web service wrapping a web service?

As part of a service orientated architecture (SOA) I've been asked to create a web service which itself acquires data from a third party web service. I'm to hide any implementation specific details ...
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1answer
483 views

The problem of dependencies management

Let's consider the next situation: We have a module A which has a class Crt570 intended to interact with a device. We have a module B which uses Crt570 in the class called M100Communicator. We have ...
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1answer
780 views

Entity framework and Eager loading and enterprise application with DDD aproach

We are trying to create an ASP.NET MVC 4 application using entity framework with domain driven development style pattern approach. As you can see in our part of domain layer, we have a complex design. ...
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2answers
2k views

Audit trails and recording actions

Background A discussion that has come up at work recently is how we handle audit logging and the recording of events. We are integrating with a 3rd party app so triggers are a no no from the off so ...
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2answers
224 views

Building workflow driven applications [closed]

Quick primer: I am a happy developer on the Microsoft platform. Up to now I never had to design any applications which contained long running processes (with or without human interaction).In the past ...
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1answer
164 views

How many Topics (queues) to practically use in an ESB

In all the Service Bus examples and tutorials I've seen, they cover publishing a single message to a single Topic that is picked up by a single listening Subscriber. Whilst this is good for a simple ...