Package org.apache.twill.api

Classes in this package provides core functionality of the Twill library.

See: Description

Interface Summary

Interface	Description
Command	Represents command objects.
ElectionHandler	Handles events of election/un-election of leader.
EventHandlerContext	Represents runtime context for EventHandler.
EventHandlerSpecification	Specification for EventHandler.
LocalFile	This interface represents a local file that will be available for the container running a TwillRunnable.
ResourceReport	This interface provides a snapshot of the resources an application is using broken down by each runnable.
ResourceSpecification	This interface provides specifications for resource requirements including set and get methods for number of cores, amount of memory, and number of instances.
RunId	Represents the unique ID of a particular execution.
RuntimeSpecification	Specifications for runtime requirements.
SecureStore	Represents storage of secure tokens.
SecureStoreUpdater	Deprecated This class doesn't handle user correctly, use SecureStoreRenewer instead
ServiceAnnouncer	This interface provides a way to announce the availability of a service.
ServiceController	This interface is for controlling a remote running service.
TwillApplication	Represents a application that can be launched by Twill.
TwillContext	Represents the runtime context of a TwillRunnable.
TwillController	For controlling a running application.
TwillPreparer	This interface exposes methods to set up the Twill runtime environment and start a Twill application.
TwillRunnable	The TwillRunnable interface should be implemented by any class whose instances are intended to be executed in a Twill cluster.
TwillRunnableSpecification	Represents a specification of a TwillRunnable.
TwillRunner	This interface prepares execution of TwillRunnable and TwillApplication.
TwillRunner.LiveInfo	Interface to represents information of a live application.
TwillRunnerService	A TwillRunner that provides lifecycle management functions.
TwillRunResources	Information about the container the TwillRunnable is running in.
TwillSpecification	Represents specification of a TwillApplication.
TwillSpecification.Builder.AfterOrder
TwillSpecification.Builder.AfterPlacementPolicy	Interface to define execution order after adding placement policies.
TwillSpecification.Builder.AfterRunnable
TwillSpecification.Builder.FirstOrder
TwillSpecification.Builder.LocalFileAdder
TwillSpecification.Builder.MorePlacementPolicies	Interface to add placement policies to the application.
TwillSpecification.Builder.MoreRunnable
TwillSpecification.Builder.NextOrder
TwillSpecification.Order	Defines execution order.
TwillSpecification.PlacementPolicy	Defines a container placement policy.

Class Summary

Class	Description
AbstractTwillRunnable	This abstract class provides default implementation of the TwillRunnable.
ClassAcceptor	Class that can be used to determine if class can be accepted.
Command.Builder	Builder for creating Command object.
Configs	Defines keys and default values constants being used for configuration.
Configs.Defaults	Defines default configuration values.
Configs.Keys	Defines keys being used in configuration.
EventHandler	A callback handler for acting on application events related to TwillRunnable lifecycle events.
EventHandler.TimeoutAction	Represents action to act upon runnable launch timeout.
EventHandler.TimeoutEvent	This class holds information about a launch timeout event.
Hosts	Represents a list of hosts.
Racks	Represents a list of Racks.
ResourceSpecification.Builder	Builder for creating ResourceSpecification.
TwillRunnableSpecification.Builder	Builder for constructing TwillRunnableSpecification.
TwillSpecification.Builder	Builder for constructing instance of TwillSpecification.

Enum Summary

Enum	Description
ResourceSpecification.SizeUnit	Unit for specifying memory size.
ServiceController.TerminationStatus	Enum to represent termination status of the application when it completed.
TwillSpecification.Order.Type
TwillSpecification.PlacementPolicy.Type	Lists different types of Placement Policies available.

Package org.apache.twill.api Description

Classes in this package provides core functionality of the Twill library.