Circular Arrows Diagrams

"Web container (also known as a Servlet container) is the component of a web server that interacts with Java servlets. A web container is responsible for managing the lifecycle of servlets, mapping a URL to a particular servlet and ensuring that the URL requester has the correct access rights. A web container implements the web component contract of the Java EE architecture, specifying a runtime environment for web components that includes security, concurrency, lifecycle management, transaction, deployment, and other services. A web container provides the same services as a JSP container as well as a federated view of the Java EE platform APIs." [Web container. Wikipedia]
The UML activity diagram example "Servlet container" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Rapid UML solution from the Software Development area of ConceptDraw Solution Park.

This circular arrows diagram sample shows advanced persistent threat lifecycle.
It was designed on the base of the Wikimedia Commons file: Advanced persistent threat lifecycle.jpg.
[commons.wikimedia.org/ wiki/ File:Advanced_ persistent_ threat_ lifecycle.jpg]
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. [creativecommons.org/ licenses/ by-sa/ 3.0/ deed.en]
"Advanced Persistent Threat (APT) APT is a set of stealthy and continuous hacking processes often orchestrated by human targeting a specific entity. APT usually targets organizations and or nations for business or political motives. APT processes require high degree of covertness over a long period of time. As the name implies, APT consists of three major components/ processes: advanced, persistent, and threat. The advanced process signifies sophisticated techniques using malware to exploit vulnerabilities in systems. The persistent process suggests that an external command and control is continuously monitoring and extracting data off a specific target. The threat process indicates human involvement in orchestrating the attack.
APT usually refers to a group, such as a government, with both the capability and the intent to persistently and effectively target a specific entity. The term is commonly used to refer to cyber threats, in particular that of Internet-enabled espionage using a variety of intelligence gathering techniques to access sensitive information, but applies equally to other threats such as that of traditional espionage or attack. Other recognized attack vectors include infected media, supply chain compromise, and social engineering. Individuals, such as an individual hacker, are not usually referred to as an APT as they rarely have the resources to be both advanced and persistent even if they are intent on gaining access to, or attacking, a specific target." [Advanced persistent threat. Wikipedia]
The arrow donut chart example
"Advanced persistent threat lifecycle" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Circular Arrows Diagrams solution from the area "What is a Diagram" of ConceptDraw Solution Park.