On Wed, 13 Nov 2024 12:06:58 GMT, Alan Bateman <al...@openjdk.org> wrote:
>> Changes for [JEP draft: Structured Concurrency (Fifth >> Preview)](https://openjdk.org/jeps/8340343). The JEP isn't on the technical >> roadmap yet. The proposal is to re-preview the API with some changes, >> specifically: >> >> - A >> [StructuredTaskScope](https://download.java.net/java/early_access/loom/docs/api/java.base/java/util/concurrent/StructuredTaskScope.html) >> is now opened with a static factory method instead of a constructor. Once >> opened, the API usage is unchanged: fork subtasks individually, join them as >> a unit, process outcome, and close. >> - In conjunction with moving to using a static open method, policy and >> desired outcome is now selected by specifying a Joiner to the open method >> rather than extending STS. A Joiner handles subtask completion and produces >> the result for join to return. Joiner.onComplete is the equivalent of >> overriding handleComplete previously. This change means that the subclasses >> ShutdownOnFailure and ShutdownOnSuccess are removed, replaced by factory >> methods on Joiner to get an equivalent Joiner. >> - The join method is changed to return the result or throw >> STS.FailedException, replacing the need for an API in subclasses to obtain >> the outcome. This removes the hazard that was forgetting to call >> throwIfFailed to propagate exceptions. >> - Configuration that was provided with parameters for the constructor is >> changed so that can be provided by a configuration function. >> - joinUntil is replaced by allowing a timeout be configured by the >> configuration function. This allows the timeout to apply the scope rather >> than the join method. >> >> The underlying implementation is unchanged except that ThreadFlock.shutdown >> and wakeup methods are no longer confined. The STS API implementation moves >> to non-public StructuedTaskScopeImpl because STS is now an interface. A >> non-public Joiners class is added with the built-in Joiner implementations. > > Alan Bateman has updated the pull request with a new target base due to a > merge or a rebase. The pull request now contains four commits: > > - Pull latest API docs + impl from loom repo > - Merge branch 'master' into JDK-8342486 > - Sync up from loom repo > - Initial commit src/java.base/share/classes/java/util/concurrent/StructuredTaskScope.java line 386: > 384: * method can be used to get the result. This is a terminal > state. > 385: */ > 386: SUCCESS, We should use all adjectives or all nouns for the enum constants. Since `UNAVAILABLE` is too hard to convert to a noun, we can consider renaming `SUCCESS` to `SUCCESSFUL`. https://mail.openjdk.org/pipermail/loom-dev/2024-December/007361.html ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/21934#discussion_r1866555358
