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Timeout connection requests when in a deadlock. - 2020-06-30 07:56:08

This patch was authored and released by @MrLotU.

Fixes a bug when requesting n+1 connections from a connection pool with limit n where each new connection waited on the previous one.

Previously, this would create a deadlock. Now, a timeout can be added to EventLoopConnectionPool, that will return a failed future if the timeout is reached. Timeout defaults to 10 seconds but can be configured. Fixes #63

Fix bug related to swift change in error string conversion - 2020-06-04 21:38:41

This patch was authored and released by @MrLotU.
  • Due to a change in Swift, all Errors became CustomStringConvertible by virtue of implicit bridging with NSError. The check for CustomStringConvertible conformance has been removed. This restores the previous behavior and makes the tests pass again.

  • Unblocks #67

New and better-behaved shutdown methods for `EventLoopGroupConnectionPool` - 2020-05-18 16:57:53

This patch was authored and released by @gwynne.
  • Soft-deprecate (documentation only, no warnings from the compiler) EventLoopGroupConnectionPool.shutdown() for being unnecessarily synchronous (among other things).
  • Add EventLoopGroupConnectionPool.shutdownGracefully(_:), modeled loosely after EventLoopGroup.shutdownGracefully(queue:_:). Shutdown takes place asynchronously, and a callback is invoked on a "safe" Dispatch queue to notify of completion and any errors.
  • Add EventLoopGroupConnectionPool.syncShutdownGracefully(), modeled rather closely after EventLoopGroup.syncShutdownGracefully(). Shutdown is synchronous from the point of view of calling code. As with any such method, it must not be invoked on any of the EventLoops in the pool's EventLoopGroup, otherwise deadlock will result. Any error that occurs is thrown.
  • Clean up how NIO.Lock is used; now both safer and spends less time with the lock held.
  • EventLoopGroupConnectionPool.requestConnection(logger:on:) and EventLoopGroupConnectionPool.withConnection(logger:on:_:) now check for an "pool was already shut down" condition and fail early.
  • Add EventLoopGroup.future(result:), a convenience method for using the corresponding version of EventLoopPromise.completeWith(_:). Useful when working with both futures and Results.
  • All AsyncKIt unit tests now bootstrap logging and respect the LOG_LEVEL environment variable.
  • The EventLoopFutureQueue unit tests now run 4 seconds faster.
  • A round of CI improvements, including improvements to the code coverage reporting.

Care has been taken not to break any existing API, despite this resulting in the confusing but for-now unavoidable presence of three distinct methods for shutting down pools. Especial care in particular has been taken to ensure that code using the legacy .shutdown() method will correctly and safely interoperate with code using the new .shutdownGracefully(_:) and .syncShutdownGracefully() methods in all cases.

Conform EventLoopFutureQueue.ContinueError to CustomStringConvertible - 2020-04-07 13:00:50

This patch was authored and released by @calebkleveter.

The EventLoopFutureQueue.ContinueError.previousError case will now be flattened when printed.

AsyncKit 1.0.0 - 2020-03-25 20:49:58

Docs: https://docs.vapor.codes/4.0/async/

More information on Vapor 4 official release: https://forums.swift.org/t/vapor-4-official-release-begins/34802

Release Candidate 1 - 2020-02-28 17:06:03

Updates to Swift 5.2 and macOS 10.15 requirements.

Release candidates represent the final shift toward focusing on bug fixes and documentation. Breaking changes will only be accepted for critical issues. We expect a final release of this package shortly after Swift 5.2's release date.

Return correct future when appending empty sequence - 2020-02-24 22:48:11

Title says it all.

Finish fixing sequence append for ELFQueue - 2020-02-24 22:21:23

Previous PR (#54) did not fully fix the problem with appending sequences to EventLoopFutureQueue. This PR covers the missing bits.

Fix sequence-append in EventLoopFutureQueue - 2020-02-24 20:50:57

The default behavior of appending to ELFQ is to run the next item on completion of the previous, but the APIs for appending sequences incorrectly assumed the next item is only run on successful completion of the previous.

Don't assert when a future in a queued sequence fails - 2020-02-11 21:13:37

Currently, if one of the futures appended by EventLoopFutureQueue.append(each:generator:) fails, we fire an incorrect assertion instead of failing the chain correctly. This PR fixes the issue and adds unit tests.

AsyncKit 1.0.0-beta.2.2 - 2020-01-31 14:20:55

Features:

  • Adds a futureTry method to EventLoop that takes in a throwing closure and produces a future with the closure's result.
  • Adds a .append(each:_:) method to the EventLoopFutureQueue type, which maps each element of the sequence passed in into a future result and then queues the future.

Fixes:

  • EventLoopFutureQueue is thread safe now.

AsyncKit 1.0.0-beta.2.1 - 2020-01-27 14:09:30

  • Adds an EventLoopFutureQueue type (https://github.com/vapor/async-kit/pull/48).

This type can be used to queue closures that emit EventLoopFutures. This allows you to ensure that a given future will not be run until the previous ones complete, succeed, or fail, depending on the condition you set.

AsyncKit 1.0.0 Beta 2 - 2019-12-09 13:57:55

  • Separated ConnectionPool into two components: EventLoopGroupConnectionPool and EventLoopConnectionPool (#42)

This change greatly reduces code complexity by breaking out the old ConnectionPool's behavior into distinct components. It also increases usability, allowing developers to choose which functionality they want to use.

EventLoopGroupConnectionPool: Maintains one EventLoopConnectionPool per EventLoop on the supplied EventLoopGroup. Use this if you are in a global, thread-safe context. This is great for application's that use wait(), classes that do EL-synchronization internally, or shared pools that want each event loop to have its own collection of pools. This class is thread-safe.

EventLoopConnectionPool: A pool of connections that is tied to a single event loop. If you have an EventLoopGroupConnectionPool, you can get an individual EventLoop's pool by doing groupPool.pool(for: eventLoop). This class is not thread-safe and must always be used from the associated EventLoop.

  • Custom Loggers are now passable anywhere logging occurs.

  • Enabled test discovery on Linux (#46)

AsyncKit 1.0.0 Beta 1 - 2019-10-24 18:49:05

  • ConnectionPool can now be shared across an EventLoopGroup. (#40)

Notes: ConnectionPool is now based on an EventLoopGroup and has a ConnectionPoolEventLoopPreference enum for informing the pool which EventLoop you would like to be called back on. ConnectionPool can still be used on a single EventLoop, this change just expands its applicability to more use cases.

  • ConnectionPool can now prune old, closed connections when resource demand is low. (#41)

AsyncKit 1.0.0 Alpha 1 - 2019-06-06 16:30:14

More information on Vapor 4 alpha releases:

https://medium.com/@codevapor/vapor-4-alpha-1-releases-begin-94a4bc79dd9a

API Docs:

https://api.vapor.codes/async-kit/master/AsyncKit/index.html

v0.1.0 - 2018-11-10 17:42:38

EventLoopFuture Operators

Adds standard operators to future types, so if you have for example, two EventLoopFuture<Int>, you can add them together:

let future1 = eventLoop.future(1)
let future2 = eventLoop.future(2)
let future3 = future1 + future2

Here's a list of all the operators:

+
+=
-
-=
*
*=
%
%=
&
&=
/
/=
>
>=
<
<=
<<
<<=
>>
>>=
^
^=
|
|=
~