SOA, ESB, Nservicebus and cloud computing

Soa

SOA is the main goal of implementing system integration and resolving information islands through functional component and service. A further step is to achieve faster response to business changes and faster rollout of new application systems. At the same time, SOA also implements consolidated resources and resource reuse.

The design criteria for SOA services are coarse-grained, highly reusable, flexible, and standard. Performance is not the primary consideration.

The two major functions of SOA are integration, service orchestration (BPEL, BPM). WF plays the role of service orchestration in the SOA architecture.

Reference Architecture:

Related resources:

Ten Principles of SOA design

Further discussion on the necessity of building SOA integration platform

On the design and development of application system based on SOA

On the consumer publishing subscription based on SOA

A further discussion on service design

Esb

An ESB is an important means of implementation of SOA. When an ESB implements SOA, it acts as a hub, a medium, and the integrated system will only interact with it. The ESB implements protocol conversion, data conversion, and transparent dynamic routing (content-based) between the various systems.

When designing an ESB, a centralized distribution module can affect performance, scalability, and fault tolerance, so the ESB has a good scalability to support clustering.

IBM summarizes the capabilities of the ESB, and the more complete features are as follows: