Some use servlet APIs directly, while many use additional frameworks that encapsulate servlet APIs, such as Apache Struts, Spring MVC, JavaServer Faces (JSF), and others. Web applications run inside a Servlet container. These services are packaged into multiple applications with the. Such services are frequently built with frameworks such as Spring Cloud. 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. These services are built around business capabilities and are independently deployable by fully automated deployment machinery. 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 applications are packaged into archives with the. Such applications are frequently built with frameworks such as Spring Boot, Dropwizard, Micronaut, MicroProfile, Vert.x, and others. These applications still handle web requests, but instead of relying on an application server to provide HTTP request handling, they incorporate HTTP communication and all other dependencies directly into the application package. Many newer applications are invoked directly from the command line. These types are described in the following sections. Most Java applications are one of the following types: Java migration questionnaire Identifying application typeīefore you select a cloud destination for your Java application, you'll need to identify its application type.

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