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What Is Mulesoft Esb? Why To Choose Esb Platform?
What is an ESB?
An enterprise service bus (ESB) is basically architecture. It is a set of rules and principles for integrating many applications into a bus-like infrastructure. ESB products allow users to build this type of architecture, but the way they work and the features they offer vary. The fundamental concept of the ESB architecture is to integrate different applications by intercalating a communication bus and then allowing each application to communicate with the bus. This separates systems from each other, allowing them to communicate without dependency or knowledge of other systems on the bus.
Why use an ESB?
Increasing organizational agility by reducing time-to-market for new initiatives is one of the most common reasons why companies implement BSE as the backbone of their IT infrastructure. An ESB architecture facilitates this by providing a simple, well-defined, "plug-in" and scalable system. In addition, an ESB enables you to leverage your existing systems and expose them to new applications through its communication and transformation capabilities.
The ESB architecture is based on some key principles for professional agility and scale. The main goal is to separate the systems from each other while allowing them to communicate in a consistent and manageable way. The concept of "bus" decouples applications from each other. This is usually done using a mail server such as JMS or AMQP.
The data that travels on the bus is in canonical format and almost always in XML format. There is an "adapter" between the application and the bus that gathers the data between the two parties.The adapter is responsible for communicating with the back-end application and transforming the data from the application format to the bus format. The adapter can perform other activities such as message routing transaction management, security, monitoring, error handling, and many more.
Integration core principles:
The following are the five core integration principles:
1. Orchestration: Composition of several existing fine-grained components into a single higher order composite service. This can be done to achieve appropriate "granularity" of services and to promote the reuse and manageability of the underlying components.
2. Transformation: Transformation of data between canonical data formats and the specific data formats required by each ESB connector. An example of this would be conversion between CSV, Cobol or EDI formats in SOAP / XML or JSON format.
3. Transportation: Negotiation of the transport protocol between several formats (such as HTTP, JMS, JDBC). Mule treats databases as another "service" by making JDBC another means of transport (or endpoint) where data can be accessed.
4. Mediation: Provide multiple interfaces for the purpose of supporting multiple versions of a service for backward compatibility, or allowing multiple channels for the same underlying component implementation. This second requirement may involve providing multiple interfaces to the same component, a legacy interface (flat file), and a standards compliant interface (SOAP / XML).
5. Non-Functional Consistency: For a typical BSE initiative, this may include consistency in how security and surveillance strategies are applied and implemented. Scalability and availability goals can be achieved by using multiple instances of an ESB to increase throughput (scalability) and eliminate single points of failure (SPOF), a key goal of high-throughput systems availability.
Choosing an ESB platform
Here are some things to consider when making an ESB selection.
Lightweight: Mule is the lightest integration platform available, with a fully loaded distribution weighing 40 MB. Modular design, you can remove unwanted modules if you want to reduce clutter. We do not consider the term "light" as a size either; it's also the cost of changes to existing integrations and the heavy workload you need to do to make changes.
Not just mediation: Most vendors view a BSE as just a mediation between systems and have separate products for hosting business logic and publishing services. We see this as unnecessary complexity. Mule provides a lightweight and scalable service container for publishing REST and SOAP services.
Most companies want to increase agility by reducing time to market for new initiatives. BSE defends this goal by implementing a simple, well-defined and "plug-in" system that is evolving very well. At MuleSoft, we understand that an ESB architecture is exactly that: an architecture and not just a product you can buy on the market. This includes not only the infrastructure, but also the design of applications.
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