Package uk.org.ogsadai.activity.extension

Activity extension interfaces and their corresponding initialiser classes.

See:
Description

Interface Summary

ActivityInitialiser	An activity initialiser handles a specific kind of initialisation task for activities.
ActivityInitialisers	Provides a collection of activity initialisers.
ConfigurableActivity	Activity extesion interface for activities that may have server-side configuration properties.
EventfulActivity	Initialisation interface for activities that dispatch their own specific events.
InputAttributesActivity	Interface used to specify that the activity can provide input attributes that can be used to configure the pipes that provide input to this activity.
RequestActivity	Activity extension interface for activities that access request resources.
RequestContextActivity	Activities that execute sub-workflows.
RequestEventActivity	Activity extension interface for activities concerned with the completion of the workflow they are part of.
RequestStatusBuildingActivity	Initialisation interface for activities that can write to the request status.
ResourceActivity	Activity extestion interface for activities that access and interact with a target resource.
ResourceFactoryActivity	Activity extension that allows activities to create new resources.
ResourceManagerActivity	Activity extension interface for activities that need to interact with a resource manager, for example for resource creation or destruction.
SecureActivity	Activity extestion interface for activities concerned with the security context of the user processing the activity.
ServiceAddresses	Gives access to the addresses (URIs) of all the OGSA-DAI services.
ServiceAddressesActivity	Extension interface used to pass details of service addresses to activities.
SessionActivity	Activity extension interface for activities that access and interact with session resources.
TaskProcessingActivity	Extension for activities that wish to process callable tasks.

Class Summary

ConfigurableActivityInitialiser	Initialises configurable activities.
DefaultActivityInitialisers	Provides the activity initialisers for use with any extension interfaces supported by OGSA-DAI.
EventfulActivityInitialiser	Initialises eventful activities.
InitialisingActivityFactory	Decorates an activity factory adding functionality to initialise the activities.
InputsAndOutputsActivityInitialiser	Initialises the inputs and outputs of an activity.
RequestActivityInitialiser	Initialises session activities by passing the session resource to the activity.
RequestContextActivityInitialiser	Initialises a pipeline spawning activity.
RequestEventActivityInitialiser	Initializes a request event activity by registering the activity as a listener to events related with the termination or completion of a certain request ID.
RequestStatusBuildingActivityInitialiser	Initialises a request status building activity.
ResourceActivityInitialiser	Initialises resource activities by passing the target resource to the activity.
ResourceFactoryActivityInitialiser	Initialises resource factory activities.
ResourceManagerActivityInitialiser	Initialises activities that need access to a resource manager.
SecureActivityInitialiser	Initialises the context of an activity.
ServiceAddressesActivityInitialiser	Activity initialiser that tells activities the addresses of the OGSA-DAI services.
SessionActivityInitialiser	Initialises session activities by passing the session resource to the activity.
SimpleServiceAddresses	Simple class that gives access to the addresses (URIs) of the OGSA-DAI services.
TaskProcessingActivityInitialiser	Initialises a pipeline spawning activity.

Exception Summary

ActivityInitialisationException	Raised if a problem occurs during activity initialisation.
IncompatibleTargetResourceException	Raised when an activity is targeted at the wrong kind of resource.
NoSessionException	Raised when an session activity could not be initialised because the request that contains the activity is not executed within a session.
NoSessionResourceException	Raised when an session activity could not be initialised because the request that contains the activity is not executed within a session.
UnknownTargetResourceException	Raised when an activity is targeted at a resource that is unknown.

Package uk.org.ogsadai.activity.extension Description

Activity extension interfaces and their corresponding initialiser classes. An activity extension interface is an optional interface implemented by activities with specific requirements. For example, activities that require access to the security context and user credentials implement the SecureActivity extension interface.

Each activity extension interface has a corresponding ActivityInitialiser class responsible for performing any specific initialisation relevant to the activity extension. Activity initialisers are also used for performing standard initialisation duties applicable to all activities, such as setting their inputs and outputs.