Package uk.org.ogsadai.engine

Contains the core classes and interfaces of the engine component which is chiefly responsible for processing requests and building responses.

See:
Description

Interface Summary

Engine	The engine is one of the core components of OGSA-DAI.
EngineConfiguration	This interface through which a RequestEngine is configured.
Pipe	Utility interface to aggregate uk.org.ogsadai.common.BlockReader and uk.org.ogsadai.common.BlockWriter together
Request	This is the interface that the RequestEngine uses for processing requests without concerning itself with the implementation.
RequestFactory	An interface for creating requests suitable for processing by an OGSA-DAI RequestEngine from OGSA-DAI perform documents.
ResponseBuilder	Interface for building a response document.

Class Summary

ConcurrencySettings	Class holding the concurrency settings of an engine.
EngineConfigurationImpl	An EngineConfiguration object is used to construct an instance of ActivityEngine, the Engine implementation supplied with OGSA-DAI.
EngineConstants	Constants relating to the engine.
ObservableStatus	This is an Observable wrapper around a Status field.
ProcessingState	Class holding an enumeration of the possible states for a ProcessingStatus object.
ProcessingStatus	An Observable class encapsulating the state of processing of OGSA-DAI entities, such as Request or Activity objects.
ProcessingStatusObserver	This is an Observer that can be registered with a ProcessingStatus then used to wait until the status changes to a finished state.
RequestContext	This class encapsulates information describing the context of a request made to an Engine.
RequestEngine	This implementation of the Engine interface is designed to process perform documents containing sequences of activity elements that correspond to Activity implementations.
RequestEngineObserver	Oberver class for monitoring instances of RequestEngine for events relating to request processing (e.g.
SimplePipe	A simple implementation of a Pipe that can contain a single object.
Status	Class representing various status of a request as it is processed by the engine.
StatusObserver	This is an Observer that can be registered with an ObservableStatus then used to wait until the status changes to a finished state.
StatusToStatusObserver	An Observer that updates the state of a destination ProcessingStatus object to match that of a source ProcessingStatus object whenever the source state changes.
SynchronizedPipe	A simple fixed-sized synchronized pipe that uses a circular buffer to store blocks of data.

Exception Summary

IllegalConcurrencySettingException	Raised when there is a problem with a concurrency setting.
MaxRequestTimeoutException	A request timeout greater than the maximum has been specified.
RequestAuthorizationException	There was an authorization failure during the execution of the request.
RequestCreationException	There was an error during the creation of an internal representation of the request.
RequestExecutionException	There was an error during the execution of the request.
RequestMaximumReachedException	The maximum number of requests that can be processed and queued has been reached.
RequestSpecificationException	There was an error during the execution of the request that was caused by information in the request.

Package uk.org.ogsadai.engine Description

Contains the core classes and interfaces of the engine component which is chiefly responsible for processing requests and building responses.