org.apache.catalina

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Java Source Code / Java Documentation » Sevlet Container » tomcat catalina » org.apache.catalina 
org.apache.catalina
Java Source File NameTypeComment
Authenticator.javaInterface An Authenticator is a component (usually a Valve or Container) that provides some sort of authentication service.
Cluster.javaInterface A Cluster works as a Cluster client/server for the local host Different Cluster implementations can be used to support different ways to communicate within the Cluster.
Connector.javaInterface A Connector is a component responsible receiving requests from, and returning responses to, a client application.
Contained.javaInterface

Decoupling interface which specifies that an implementing class is associated with at most one Container instance.


author:
   Craig R.
Container.javaInterface A Container is an object that can execute requests received from a client, and return responses based on those requests.
ContainerEvent.javaClass General event for notifying listeners of significant changes on a Container.
author:
   Craig R.
ContainerListener.javaInterface Interface defining a listener for significant Container generated events. Note that "container start" and "container stop" events are normally LifecycleEvents, not ContainerEvents.
author:
   Craig R.
ContainerServlet.javaInterface A ContainerServlet is a servlet that has access to Catalina internal functionality, and is loaded from the Catalina class loader instead of the web application class loader.
Context.javaInterface A Context is a Container that represents a servlet context, and therefore an individual web application, in the Catalina servlet engine. It is therefore useful in almost every deployment of Catalina (even if a Connector attached to a web server (such as Apache) uses the web server's facilities to identify the appropriate Wrapper to handle this request. It also provides a convenient mechanism to use Interceptors that see every request processed by this particular web application.

The parent Container attached to a Context is generally a Host, but may be some other implementation, or may be omitted if it is not necessary.

The child containers attached to a Context are generally implementations of Wrapper (representing individual servlet definitions).


author:
   Craig R.

DefaultContext.javaInterface Used to store the default configuration a Host will use when creating a Context.
Deployer.javaInterface A Deployer is a specialized Container into which web applications can be deployed and undeployed.
Engine.javaInterface An Engine is a Container that represents the entire Catalina servlet engine.
Globals.javaClass Global constants that are applicable to multiple packages within Catalina.
author:
   Craig R.
Group.javaInterface

Abstract representation of a group of User s in a UserDatabase .

Host.javaInterface A Host is a Container that represents a virtual host in the Catalina servlet engine.
HttpRequest.javaInterface An HttpRequest is the Catalina internal facade for an HttpServletRequest that is to be processed, in order to produce the corresponding HttpResponse.
author:
   Craig R.
HttpResponse.javaInterface An HttpResponse is the Catalina-internal facade for an HttpServletResponse that is to be produced, based on the processing of a corresponding HttpRequest.
author:
   Craig R.
InstanceEvent.javaClass General event for notifying listeners of significant events related to a specific instance of a Servlet, or a specific instance of a Filter, as opposed to the Wrapper component that manages it.
author:
   Craig R.
InstanceListener.javaInterface Interface defining a listener for significant events related to a specific servlet instance, rather than to the Wrapper component that is managing that instance.
author:
   Craig R.
Lifecycle.javaInterface Common interface for component life cycle methods.
LifecycleEvent.javaClass General event for notifying listeners of significant changes on a component that implements the Lifecycle interface.
LifecycleException.javaClass General purpose exception that is thrown to indicate a lifecycle related problem.
LifecycleListener.javaInterface Interface defining a listener for significant events (including "component start" and "component stop" generated by a component that implements the Lifecycle interface.
author:
   Craig R.
Loader.javaInterface A Loader represents a Java ClassLoader implementation that can be used by a Container to load class files (within a repository associated with the Loader) that are designed to be reloaded upon request, as well as a mechanism to detect whether changes have occurred in the underlying repository.

In order for a Loader implementation to successfully operate with a Context implementation that implements reloading, it must obey the following constraints:

  • Must implement Lifecycle so that the Context can indicate that a new class loader is required.
  • The start() method must unconditionally create a new ClassLoader implementation.
  • The stop() method must throw away its reference to the ClassLoader previously utilized, so that the class loader, all classes loaded by it, and all objects of those classes, can be garbage collected.
  • Must allow a call to stop() to be followed by a call to start() on the same Loader instance.
  • Based on a policy chosen by the implementation, must call the Context.reload() method on the owning Context when a change to one or more of the class files loaded by this class loader is detected.

author:
   Craig R.
Logger.javaInterface A Logger is a generic interface for the message and exception logging methods of the ServletContext interface.
Manager.javaInterface A Manager manages the pool of Sessions that are associated with a particular Container.
Pipeline.javaInterface

Interface describing a collection of Valves that should be executed in sequence when the invoke() method is invoked.

Realm.javaInterface A Realm is a read-only facade for an underlying security realm used to authenticate individual users, and identify the security roles associated with those users.
Request.javaInterface A Request is the Catalina-internal facade for a ServletRequest that is to be processed, in order to produce the corresponding Response.
author:
   Craig R.
Response.javaInterface A Response is the Catalina-internal facade for a ServletResponse that is to be produced, based on the processing of a corresponding Request.
author:
   Craig R.
Role.javaInterface

Abstract representation of a security role, suitable for use in environments like JAAS that want to deal with Principals.


author:
   Craig R.
Server.javaInterface A Server element represents the entire Catalina servlet container.
ServerFactory.javaClass

ServerFactory allows the registration of the (singleton) Server instance for this JVM, so that it can be accessed independently of any existing reference to the component hierarchy.

Service.javaInterface A Service is a group of one or more Connectors that share a single Container to process their incoming requests.
Session.javaInterface A Session is the Catalina-internal facade for an HttpSession that is used to maintain state information between requests for a particular user of a web application.
author:
   Craig R.
SessionEvent.javaClass General event for notifying listeners of significant changes on a Session.
author:
   Craig R.
SessionListener.javaInterface Interface defining a listener for significant Session generated events.
author:
   Craig R.
Store.javaInterface A Store is the abstraction of a Catalina component that provides persistent storage and loading of Sessions and their associated user data. Implementations are free to save and load the Sessions to any media they wish, but it is assumed that saved Sessions are persistent across server or context restarts.
author:
   Craig R.
User.javaInterface

Abstract representation of a user in a UserDatabase .

UserDatabase.javaInterface

Abstract representation of a database of User s and Group s that can be maintained by an application, along with definitions of corresponding Role s, and referenced by a Realm for authentication and access control.


author:
   Craig R.
Valve.javaInterface

A Valve is a request processing component associated with a particular Container.

ValveContext.javaInterface

A ValveContext is the mechanism by which a Valve can trigger the execution of the next Valve in a Pipeline, without having to know anything about the internal implementation mechanisms.

Wrapper.javaInterface A Wrapper is a Container that represents an individual servlet definition from the deployment descriptor of the web application.
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