Web services utilizes a standardized medium to propagate communication between a client and server application on the world wide web. Web services are software modules designed to perform a certain task. Web services provides common platform that allows applications built with different programming languages to communicate with each other. There are 2 types of web services including SOAP web services and RESTFul web service.

SOAP web services, is also known as a transport-independent messaging protocol where each message is an XML document. It uses WSDL to communicate between consumer and provider. It invokes services by calling the RPC method; and doesn’t return human readable result. Transfer is mainly over HTTP , the standard web protocol as well as SMTP/FTP protocols SOAP performance is not as great as REST.

RESTFul web services, is an architectural style protocol that is used to build Web services that are lightweight, maintainable, and scalable in nature. It uses XML or JSON to send and receive data. It returns human readable results in plain XML and JSON. Transfer is over HTTP.. RESTY is much less CPU intensive, it uses URL paths and is easy to call using Javascript. Its architecture is stateless and supports caching.

Microservices is a service-oriented architecture construct where applications are built as a collection of independent service units. It is a software engineering approach that uses decomposing to bring an application in to a single functional module. There are several tools that can be used to provide Microservices such as Docker, Hystrix, and Wiremock. A distributed system, it is inherently complex model that requires effective management and teamwork to deliver a perfect result.

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