Version: 9.4.5.v20170502
Version: 9.4.5.v20170502 |
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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.xmlNote
If you start Jetty without specifying a configuration file, Jetty automatically locates and uses the default installation
jetty.xmlfile. Thereforejava -jar start.jaris equivalent tojava -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 `8080`if the port is not specified:
<Set name="port"><SystemProperty name="jetty.http.port" default="8080"/></Set>Then you modify the port while running Jetty by using this command:
java -Djetty.http.port=8888 -jar start.jar etc/jetty.xmlAn example of defining both system properties and properties files from the command line:
java -Djetty.http.port=8888 -jar start.jar myjetty.properties etc/jetty.xml etc/other.xml