StandardHost

The following diagram highlights key aspects of the Host component. A virtual host in Tomcat is represented by an instance of the org.apache.catalina.core.StandardHost class. This class extends ContainerBase, thereby inheriting all the features and abilities of a standard container. In addition, it implements org.apache.catalina.Host to qualify as a standard Host component.

The properties exposed by the<Host> element are represented as data members of the StandardHost.

In addition, a String array of aliases holds the set of aliases that may be used to refer to a given host. As we saw earlier, aliases are defined for a<Host> element by nesting<Alias> elements within it.

At startup, the StandardHost instantiates a host configurator and registers it as a lifecycle listener. This configurator is an org.apache.catalina.startup.HostConfig instance and contains the functionality required to deploy and reload the host's web applications.

As a lifecycle listener, this...