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Synchronous calls considered harmful "Microservices" - yet another new term on the crowded streets of software architecture. Although our natural inclination is to pass such things by with a contemptuous glance, this bit of terminology describes a style of software systems that we are finding more and more appealing.
In short, the microservice architectural style  is an approach to developing a single application as a suite of small services, each running in its own process and communicating with lightweight mechanisms, often an HTTP resource API. These services are built around business capabilities and independently deployable by fully automated deployment machinery.
There is a bare minimum of centralized management of these services, which may be written in different programming languages and use different data storage technologies. My Microservices Resource Guide provides links to the best articles, videos, books, and podcasts about microservices.
Enterprise Applications are often built in three main parts: The server-side application will handle HTTP requests, execute domain logic, retrieve and update data from the database, and select and populate HTML views to be sent to the browser. This server-side application is a monolith - a single logical executable .
Any changes to the system involve building and deploying a new version of the server-side application. Such a monolithic server is a natural way to approach building such a system.
All your logic for handling a request runs in a single process, allowing you to use the basic features of your language to divide up the application into classes, functions, and namespaces.
You can horizontally scale the monolith by running many instances behind a load-balancer. Monolithic applications can be successful, but increasingly people are feeling frustrations with them - especially as more applications are being deployed to the cloud.
Change cycles are tied together - a change made to a small part of the application, requires the entire monolith to be rebuilt and deployed. Scaling requires scaling of the entire application rather than parts of it that require greater resource.
Monoliths and Microservices These frustrations have led to the microservice architectural style: As well as the fact that services are independently deployable and scalable, each service also provides a firm module boundary, even allowing for different services to be written in different programming languages.
They can also be managed by different teams. We do not claim that the microservice style is novel or innovative, its roots go back at least to the design principles of Unix. But we do think that not enough people consider a microservice architecture and that many software developments would be better off if they used it.
Characteristics of a Microservice Architecture We cannot say there is a formal definition of the microservices architectural style, but we can attempt to describe what we see as common characteristics for architectures that fit the label.
As with any definition that outlines common characteristics, not all microservice architectures have all the characteristics, but we do expect that most microservice architectures exhibit most characteristics.
While we authors have been active members of this rather loose community, our intention is to attempt a description of what we see in our own work and in similar efforts by teams we know of.
In particular we are not laying down some definition to conform to.Research is a great way to write original, unique and trendy content. You might have enough knowledge on the subject but research will give you latest knowledge that can improve the effectiveness of .
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