# All Classes and Interfaces

Class
Description
AbstractServiceReferenceConfig
Deprecated.
EngineConstants
The `CoreConstants` interface provides some symbolic constants for well known constant strings in Sling.
ErrorHandler
Deprecated.
Please use `ErrorHandler` instead.
FilterProcessorMBean
This is the management interface for the Filter.
RequestInfo
Information about a single request.
RequestInfoProvider
This service can be used to gather information about requests processed by the engine.
RequestLog
Deprecated.
Use the request progress tracker instead.
RequestProcessorMBean
This is the management interface for the SlingRequestProcessor.
RequestUtil
Deprecated.
Use `RequestUtil`
ResponseUtil
Deprecated.
Use `ResponseUtil`
SlingRequestProcessor
The `SlingRequestProcessor` interface defines the service which may be called to handle HTTP requests.
SlingSettingsService
Deprecated.
Use the `SlingSettingsService`