## Catalina API

Packages
org.apache.catalina
org.apache.catalina.authenticator: This package contains `Authenticator` implementations for the various supported authentication methods (BASIC, DIGEST, and FORM).

org.apache.catalina.cluster

This package contains code for Clustering, the base class of a Cluster is `org.apache.catalina.Cluster` implementations of this class is done when implementing a new Cluster protocol The only Cluster protocol currently implemented is a MulticastProtocol
StandardCluster.java In addition to the `Cluster` implementation `StandardCluster` there's a listener and a sender implemented using multicasting.

org.apache.catalina.connector
org.apache.catalina.connector.http
org.apache.catalina.connector.http10
org.apache.catalina.connector.warp
org.apache.catalina.core
org.apache.catalina.deploy: This package contains Java objects that represent complex data structures from the web application deployment descriptor file (`web.xml`).
org.apache.catalina.loader
org.apache.catalina.logger
org.apache.catalina.net
org.apache.catalina.realm: This package contains `Realm` implementations for the various supported realm technologies for authenticating users and identifying their associated roles.
org.apache.catalina.servlets: This package contains `Servlets` that implement some of the standard functionality provided by the Catalina servlet container.
org.apache.catalina.session: This package contains the standard `Manager` and `Session` implementations that represent the collection of active sessions and the individual sessions themselves, respectively, that are associated with a `Context`.
org.apache.catalina.startup
org.apache.catalina.util
org.apache.catalina.util.ssi: This package contains code that is used by the SsiInvoker.
org.apache.catalina.util.xml
org.apache.catalina.valves: This package contains a variety of small Valve implementations that do not warrant being packaged separately.
org.apache.naming: This package contains a memory based naming service provider.
org.apache.naming.factory: This package contains object factories used by the naming service.
org.apache.naming.java: This package contains the URL context factory for the "java" namespace.
org.apache.naming.resources: This package contains the resources directory context implemetation.
org.apache.naming.resources.jndi

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