jetty

Jetty is a term with two common meanings. In coastal engineering, a jetty is a man-made structure that projects into a sea, river, or lake to influence currents, protect harbors, and aid navigation. Jetties extend from the shoreline and are designed to interrupt longshore sediment transport, reduce shoaling at harbor entrances, and provide mooring or access channels for ships. They are typically long, narrow works built from rock, concrete, or rubble-mound fill, and may be used singly or in pairs as part of a broader breakwater system.

Design and maintenance considerations include local wave climate, tidal range, sediment supply, scour around foundations, and ongoing dredging needs. Jetties must withstand marine conditions and can require regular inspection and reinforcement. Variants include rock jetties and rubble-mound jetties, as well as structures connected to causeways.

In computing, Jetty is an open-source Java-based HTTP server, servlet container, and web server developed under the Eclipse Foundation. Jetty is designed to be lightweight, fast, and highly embeddable within Java applications. It provides a modular architecture with components for HTTP connectors, servlet handling, WebSocket support, and asynchronous I/O. Jetty can run as a standalone server or be embedded in other programs, and is widely used in enterprise, cloud, and development environments.

Jetty is released under the Apache License 2.0. It emphasizes small footprint, easy integration, and support for modern web standards, including HTTP/2. It has been adopted by numerous projects and frameworks as an alternative to heavier servlet containers.

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