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Jetty provides an XML-based configuration. It is grounded in Java's Reflection API. Classes in the java.lang.reflect represent Java methods and classes, such that you can instantiate objects and invoke their methods based on their names and argument types. Behind the scenes, Jetty's XML config parser translates the XML elements and attributes into Reflection calls.
To use jetty.xml, specify it as a configuration
file when running Jetty.
java -jar start.jar etc/jetty.xml
If you start Jetty without specifying a configuration file, Jetty
automatically locates and uses the default installation
jetty.xml file. Therefore java -jar
start.jar is equivalent to java -jar start.jar
etc/jetty.xml .
You are not limited to one configuration file; you can use multiple
configuration files when running Jetty, and Jetty will configure the
appropriate server instance. The ID of the server in the
<Configure> tag specifies the instance you want to configure.
Each server ID in a configuration file creates a new server instance
within the same JVM. If you use the same ID across multiple configuration
files, those configurations are all applied to the same server.
You can set parameters in configuration files either with system
properties (using <SystemProperty>) or properties
files (using <Property>) passed via the command line.
For example, this code in jetty.xml allows the port to be
defined on the command line, falling back onto 8080if
the port is not specified:
<Set name="port"><SystemProperty name="jetty.port" default="8080"/></Set>
Then you modify the port while running Jetty by using this command:
java -Djetty.port=8888 -jar start.jar etc/jetty.xml An example of defining both system properties and properties files from the command line:
java -Djetty.port=8888 -jar start.jar myjetty.properties etc/jetty.xml etc/other.xml See an error or something missing? Contribute to this documentation at Github!