¿Qué es la implementación de la lógica de negocios?

What is business logic implementation?

Business logic is the custom rules or algorithms that handle the exchange of information between a database and user interface. Business logic is essentially the part of a computer program that contains the information (in the form of business rules) that defines or constrains how a business operates.

The business logic should be placed in the model, and we should be aiming for fat models and skinny controllers. As a start point, we should start from the controller logic. For example: on update, your controller should direct your code to the method/service that delivers your changes to the model.

This requires your business layer to look like 1) UI views of the data 2) business views of the data and 3) the database representation of the data. That and/or you need a lot of mapping in-between layers. All of which dilutes business layer’s actual purpose of representing business logic.

The layer which holds business logic can be called Business Service and in this case layer hierarchy may be the following: Each Entity (or table in database) has its individual Repository with simple methods like Get, Delete etc. Service serves a scope and holds all Repositories which are relevant to a scope.

If we’re talking about multi-tier applications, it seems pretty clear that business logic, the kind of intelligence that runs a particular enterprise, belongs in the Business Logic Layer, not in the Data Access Layer. They provide performance optimizations.

Therefore Business Layer methods adds/inserts new data into the in-memory data classes or simply changes any loaded data from the database. However the Business Layer never calls EF’s SaveChanges. That is done in the Service Layer that called it.

Designing Business Logic Layer: Some Guidelines

1. We try to mix business rules of different modules wishfully.
2. Writing methods with abundant codes.
3. Not clearly separating responsibilities of presentation and data access layers.
4. Creating code duplicity, i.e.; writing same set of code or methods at various places.

Business logic should live in the data model. And, what’s more, it should live in the graph data model because that’s the right abstraction for the next twenty years.

The API is the facade. It should not contain the actual business logic of the task at hand. Instead, the real behavior should remain within the underlying Service class. An API Layer is the best place for cross-cutting concerns.

Business logic is that portion of an enterprise system which determines how data is: Transformed and/or calculated. For example, business logic determines how a tax total is calculated from invoice line items. Routed to people or software systems, aka workflow.

For example, a business rule might state that no credit check is to be performed on return customers. Other examples of business rules include requiring a rental agent to disallow a rental tenant if their credit rating is too low, or requiring company agents to use a list of preferred suppliers and supply schedules.

Sitting at the core of the service is the business logic, which is typically the most complex part of the service and it’s invoked by the inbound adapters. The business logic invokes the outbound adapters to access the database and publish messages.

Business logic is basically rules of the system according to functional specifications. For example Object A of type B must have attributed C and D, but not E. Application Logic is more of a technical specification, like using Java servlets and OJB to persist to an Oracle database.

Business logic vs business rules Business rules are a formal expression of business policy, while business logic determines how this policy is implemented as a process. For example, the application of VAT on invoices is a business rule but the calculations involved in applying it are implemented as business logic.

A1: Business Logic goes to Model part in MVC . Role of Model is to contain data and business logic. Controller on the other hand is responsible to receive user input and decide what to do. A2: A Business Rule is part of Business Logic .

There you have it: an API is an interface that allows you to build on the data and functionality of another application, while a web service is a network-based resource that fulfills a specific task. Yes, there’s overlap between the two: all web services are APIs, but not all APIs are web services.

A REST or Web services API layer offers a decoupled interface to data and/or functionality of one or more applications. It provides a common, language-agnostic way of interacting with an application.

The key decision you must make when developing business logic is whether to use an object-oriented approach or a procedural approach. The two main patterns for organizing business logic are the procedural Transaction Script pattern, and the object-oriented Domain Model pattern.

Keep your data locality in mind, think about performance but try to keep business logic out of stored procedures. Where you cannot avoid business logic in stored procedures use tools and processes to help. We were unable to load Disqus.

The pros of implementing business logic in the DB I can think of are: No rework on application technology migration (e.g.: .NET to Java, Perl to Python, etc). SQL is less productive and more complex for business logic programming, due to the lack of libraries and language constructs the most application-oriented languages offer;