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What is Service Oriented Architecture (SOA)?

  • Ashesh Anand
  • Jan 27, 2023
What is Service Oriented Architecture (SOA)? title banner

Early in the twenty-first century, service-oriented architecture (SOA) appeared as a development of distributed computing. Services were viewed as the product of the application development process before SOA. The application itself in SOA is made up of services. Services can be provided separately or as parts of a bigger, composite service.

 

 

Service-oriented architecture: What is it?

 

Software components can be made reusable by using service interfaces, according to the definition of SOA, or service-oriented architecture. These interfaces make use of widespread communication protocols so they can be quickly added to new applications without requiring significant integration each time. Its tenets are unaffected by suppliers and other technologies. 

 

Numerous services interact with one another in a service-oriented architecture in one of two ways: by exchanging data or by jointly coordinating action between multiple services. This is but one example of a definition of an SOA.

 

A complete, discrete business function, such as checking a customer's credit, figuring out a loan payment each month, or processing a mortgage application, is executed by each service in an SOA. Because of the loose coupling provided by the service interfaces, they can be called with little to no understanding of how the integration is put into practice. 

 

To send requests to read or modify data, the services are offered using common network protocols like SOAP (simple object access protocol)/ HTTP or JSON/HTTP. The services are made available in a form that makes it simple for programmers to locate and reuse them when building new apps.

 

Although these services can be developed from scratch, they are frequently made by making old systems of record functions available as service interfaces. In this way, SOA symbolizes a significant period in the growth of application development and integration over the past few decades. 

 

Before the advent of SOA in the late 1990s, developers had to completely or partially construct sophisticated point-to-point integration for every new development project to connect an application to data or functionality stored in another system. There is no longer a need to constantly recreate the deep integration when such functions are exposed through SOA.

 

Be aware that even though the more current microservices design and SOA use many of the same terms, they are only tangentially connected and have separate scopes of operation.

 

Also Read | How is AI revolutionizing Architecture?

 

 

What is Service?

 

A service is a clearly defined, stand-alone function that symbolizes a functional unit. Information from one service may be exchanged with another service. It is independent of how well another service is performing. With applications and other services, it communicates via a loosely connected, message-based paradigm.

 

 

Service Connections: What are they?

 

The service consumer contacts the service provider with a service request, and the service provider replies with the service response. Both the service customer and the service provider can understand the link.

 

 

Implementing Service-Oriented Architecture:

 

Depending on your ultimate goal and what you're attempting to achieve, there are a variety of technologies that can be utilized to create service-oriented architecture (SOA). Web services are typically used to develop service-oriented architecture, making the "functional building blocks accessible across conventional internet protocols."

 

The SOAP, or Simple Object Access Protocol, the standard is an illustration of a web service standard. The gist of SOAP is that it "is a message protocol standard for exchanging structured information in the deployment of web services in computer networks. 

 

Although SOAP was initially not well embraced, since 2003 it has grown in popularity and is being utilized and accepted by a wider range of people. Jini, COBRA, or REST are further choices for putting a service-oriented architecture into practice.

 

Being able to "work independently of specific technologies" means that designs can be implemented in a variety of methods, including messaging with ActiveMQ, Apache Thrift, and SORCER, to name a few.

 

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Importance of Service-Oriented Architecture:

 

Particularly in a web service-based firm, service-oriented design has many advantages. Here, we'll briefly go over a number of those advantages:


Importance of Service-Oriented Architecture

Importance of Service-Oriented Architecture


 

 

  1. Create reusable code using service-oriented architecture: 

 

Not only does this reduce the amount of time spent on the development process, but it also eliminates the need to redo the coding process each time a new service or process is required. Because everything is controlled by a single interface, employing several coding languages is also possible with service-oriented architecture.

 

 

  1. Promote interaction by using service-oriented architecture:

 

The service-oriented architecture establishes a common form of communication that enables disparate systems and platforms to operate independently of one another. Service-Oriented Architecture can circumvent barriers through this contact, enabling "businesses to exchange services that are critical to operations."

 

 

  1. Use SOA for scalability: 

 

A company must be able to scale to meet the needs of its customers, but certain dependencies may prevent this from happening. The contact between the client and the service is reduced when using a service-oriented architecture, increasing scalability.

 

 

  1. Reduce costs by using service-oriented architecture: 

 

The service-oriented architecture allows for cost reduction while "maintaining a desirable level of production." Business organizations can reduce the amount of analysis needed when creating unique solutions by utilizing service-oriented architecture.

 

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What is Service-Oriented Architecture Testing?

 

A testing phase is included in a service-oriented architecture to ensure that the final result meets quality standards. Testing for service-oriented architecture encompasses the entire architecture as a whole, not just the layers and web services. Service Consumers, Process Layers, and Service Layers are the three architectural layers in which the testing process is located. Four categories can be used to categorize testing:

 

  • Tier 1 – Service level testing, functional testing, security testing, and performance testing are all included in Tier 1. The initial step in service-level testing is to evaluate individual services based on request and response. Business requirements are translated into test cases, and then requests are produced. 

 

The forms of the answer scenarios, both positive and negative, must be executed. Functional testing is done for services on their business needs to determine if the response they receive is accurate. Authenticating gateways, ensuring that data is encrypted as it is decoded, and checking for XML, CSRF, and SQL injection vulnerabilities are all important aspects of security testing.

 

 

  • Tier 2 –  Numerous business processes, including integration scenarios and applications that address business requirements, are tested as part of the testing process. You can create sample input data and validate corresponding outputs using stimulators. You test the data flow from various layers during this procedure to ensure smooth operation after integration.

 

 

  • Tier 3 –Testing verifies both functional and non-functional business requirements, as well as the application's user interface, end-to-end data flow, and integration of all services.

 

 

  • Tier 4 –   Testing includes both manual and automated tests to determine the stability of the system.

 

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Guiding Principles of SOA:

 

  1. Standardized service contract: One or more service description documents serve as the basis for a standard service contract.

 

  1. Loose coupling: Services maintain connections that reduce reliance on other services and are created as independent units.

 

  1. Abstraction: Service contracts and description documents completely define a service. They conceal their implementation, which contains its logic.

 

  1. Reusability: By being designed as components, services can be reused more successfully, cutting down on the amount of time and money needed for development.

 

  1. Autonomy: Services have autonomy over the logic they contain, and from the perspective of the service user, it is not necessary to understand how they were implemented.

 

  1. Discoverability: Services are described in description documents, which act as extra metadata that make it possible to find them. An efficient way to make use of external resources is through service discovery.

 

  1. Composability: Complex and sophisticated operations can be created by using services as building pieces. Service composition and business objectives are strongly supported by service orchestration and choreography.

 

Also Read | How is AI used in Revenue Cycle Management?

 

 

Advantages of SOA:

 

  1. Shorter time to market and more flexibility: Since services can be reused, developers may create applications much more quickly and easily than they would be able to with monolithic apps, which would require them to start from scratch each time.

 

  1. Apply legacy infrastructure to new markets: SOA makes it simpler for programmers to scale and expand the functionality of one platform or environment to another.

 

  1. Cost savings from more agile and effective development

 

  1. Simple maintenance: All services can be updated and changed as needed without affecting other services because they are autonomous and self-contained.

 

  1. Scalability: Scalability is significantly improved by SOA, which enables services to function across many services, platforms, and programming languages. Additionally, SOA uses a standardized communication protocol, enabling businesses to reduce the amount of time that clients and services communicate. This amount of engagement can be decreased to make scaling programs easier and less disruptive.

 

  1. Greater reliability is a result of SOA since smaller services are simpler to debug than huge pieces of code.

 

  1. The convenience of accessibility: Anyone can use SOA facilities.

 

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Disadvantages of SOA:

 

  1. SOA demands significant financial outlays (which means large investments in technology, development, and human resource).

 

  1. When a service communicates with another service, there is more overhead, which lengthens the response time and places more demands on the machine while validating the input parameters.

 

  1. Because SOA demands extensive data interchange, GUI (graphical user interface) applications are not appropriate for SOA.

 

Also Read | What is SAAS? Services, Advantages & Challenges

 

 

Difference between SaaS and service-oriented architecture:

 

We've covered a lot of ground in terms of explaining what SOA is and how it may help your company grow. However, SaaS (Software as a Service) is another option that you might use to grow your company. What SaaS is and how it differs from service-oriented architecture may be on your mind. 

 

Software applications are the resources made available through SaaS, in short. The SaaS infrastructure is "accessible to but concealed from users," which is a crucial element. SaaS users benefit from not having to install and maintain software, which gets rid of any complicated needs. SaaS reduces expenses because providers are only maintaining one application and the consumer doesn't need any upfront licensing.

 

Also Read | A Step Towards Artificial Super Intelligence (ASI)

 

 

Final Thoughts On Service-Oriented Architecture:

 

More rigorous and formal service definitions are needed for SOAP-based web services than for RESTful web services or microservices when implementing a service-oriented architecture. Some larger businesses, though, still prefer the SOAP-enforced formality. 

 

The SOAP protocol is also used to build many large-scale legacy systems, and some internal and B2B systems prefer SOAP-based web services because of their more explicitly specified API contracts. Understanding the SOA pattern and being able to weigh your options for applying it will be helpful to you in your programming career, whether you are creating or maintaining a large-scale corporate system.

 

As you might expect, service-oriented architecture can be a bit of a challenge to grasp, but once you do, you'll be glad you did because of the advantages it can provide your business. While lowering the costs that are frequently experienced while implementing business service solutions, SOA helps ensure that applications can be easily scaled.

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