# Package org.apache.coyote.http11.upgrade

Interface Summary
InternalHttpUpgradeHandler: This Tomcat specific interface is implemented by handlers that require direct access to Tomcat's I/O layer rather than going through the Servlet API.

Class Summary
UpgradeApplicationBufferHandler: Trivial implementation of `ApplicationBufferHandler` to support saving of HTTP request bodies during an HTTP/1.1 upgrade.
UpgradeGroupInfo: This aggregates the data collected from each UpgradeInfo instance.
UpgradeInfo: Structure to hold statistical information about connections that have been established using the HTTP/1.1 upgrade mechanism.
UpgradeProcessorBase
UpgradeProcessorExternal
UpgradeProcessorInternal
UpgradeServletInputStream
UpgradeServletOutputStream