View source for Commons Daemon

{{more citations needed|date=June 2023}}
{{Infobox software
| name = Commons Daemon
| logo = 
| screenshot = 
| caption = 
| developer = [[Apache Software Foundation]]
| latest release version = 1.3.4<ref>{{cite web | url=https://commons.apache.org/proper/commons-daemon/changes-report.html | title=Daemon – Apache Commons Daemon Release Notes }}</ref>
| latest release date = {{Start date and age|2023|05|10}}
| operating system = [[Cross-platform]]
| programming language = [[Java (programming language)|Java]], [[C (programming language)|C]]
| genre = [[Library (computing)|Library]]
| license = [[Apache License 2.0]]
| website = {{URL|http://commons.apache.org/daemon}}
}}
'''Commons Daemon''', formerly known as '''JSVC''', is a [[Java (Sun)|Java]] [[Library (computer science)|software library]] belonging to the [[Apache Software Foundation|Apache]] [[Apache Commons|Commons Project]].

Daemon provides a portable means of starting and stopping a [[Java Virtual Machine]] (JVM) that is running server-side applications.  Such applications often have additional requirements compared to client-side applications.  For example, the servlet container [[Apache Tomcat|Tomcat 4]] would need to serialize sessions and shutdown web applications before the JVM process terminates.

Daemon comprises 2 parts: a native library written in  [[C (programming language)|C]] that interfaces with the operating system, and the library that provides the Daemon API, written in Java.

There are two ways to use Commons Daemon: by implementing the daemon interface or by calling a class that provides the required methods for daemon. For example, Tomcat-4.1.x uses the daemon interface and Tomcat-5.0.x provides a class whose methods are called by JSVC directly.

{{Apache Software Foundation}}

== References ==
{{reflist}}

[[Category:Java (programming language) libraries]]
[[Category:Apache Software Foundation|Commons Daemon]]
[[Category:Apache Commons|Daemon]]