• Task Scheduler:

• Specialized task scheduler that helps ensure the user has a chance to add all required exception handlers to a future before the future is completed

• Futures:

• Objects representing a delayed computation

• Custom futures that implement the EsFuture interface may be integrated into the framework (@see @EsFuture-Interface category)

• Turn any synchronous activity into an asynchronous activity (i.e. EsFuture on: [self doSyncActivity])

• (Chainable) Create async call chains (i.e ((future then: [:result1 | self doSomething(result1)]) then: [:result2 | ...))

• @see <EsFuture> class comments for more details

• Promises:

• Objects that provide a future and is used to programmatically complete the future.

• Can be used to convert callback style to async style

• @see <EsPromise> class comments for more details

• Zones:

• Asynchronous dynamic extent of a call

• Handle errors for asynchronous code

• Provides zone-local values

• Various ways to customize how an asynchronous task is scheduled and executed

• Stream of asynchronous events

• Single-subscription streams with events in order and all are received.

• Broadcast streams can have multiple listeners at any time

• Async equivalents of #on:do: and ensure: are provided

• Can signal arbitrary objects, in addition to other exceptions

• All unhandled exceptions make their way to the <EsAsyncUncaughtErrorHandler> (logged to tty console by default)