Twitter future vs scala future
Wonderful reusable code from Twitter. Contribute to twitter/util development by creating an account on GitHub. util / util-core / src / main / scala / com / twitter / util / Future.scala. Find file Copy path mosesn util-core: Provide Future#toCompletableFuture 2642791 Dec 5, 2019. Scala continues to grow at a faster rate internally then any other language, and is ~50% of Twitter's backend codebase. Source: I work there. Enjoy productive Java with IntelliJ IDEA. Discover instant and clever code completion, on-the-fly code analysis, and reliable refactoring tools. Convert a Twitter Future to a Java native CompletableFuture. This should match the semantics of a Java Future as closely as possible to avoid issues with the way another API might use them. At the same time, its semantics should be similar to those of a Twitter Future, so it propagates cancellation. See: Futures. A Future is an object holding a value which may become available at some point. This value is usually the result of some other computation: If the computation has not yet completed, we say that the Future is not completed. Scala Future. The Scala Future is well-described on the official Futures and Promises page: Futures provide a nice way to reason about performing many operations in parallel -- in an efficient and non-blocking way. The idea is simple; a Future is a sort of a placeholder object that you can create for a result that does not yet exist. Twitter's Future has the Future.within method, allowing us to specify a declarative timeout rather than an imperative one. Twitter's Future .onSuccess, .onFailure and .rescue methods return a chained future, allowing us to chain callbacks. In contrast, the counterpart methods in Scala's Future implementation are
Converting a Twitter future to a Scala Future. GitHub Gist: instantly share code, notes, and snippets.
Like Scala and Java, C# also makes the distinction between the future and promise the computation vs Explicit promises where we have to trigger the resolution of future C++ inspired by the implementation of Futures by Twitter for Scala. 2015年2月20日 applyの挙動がscala.concurrentと違う. TL;DR. com.twitter.util.Future はそれだけ ではasyncで実行しない。 FuturePool As far as I can tell the main difference that could go in favor of using Twitter's Future is that it can be cancelled, unlike scala's Future. Also, there used to be some support for tracing the call chains (as you probably know plain stack traces are close to being useless when using Futures). Effective Scala contains a section discussing futures; As of Scala 2.10, the Scala standard library has its own futures implementation and API, described here. Note that this is largely similar to the API used in Finagle (com.twitter.util.Future), but there are still some naming differences.
This is the second of several posts describing protips for scala.concurrent.Future. For the previous post, click here.
Monix Task vs Scalaz vs Future, The Benchmark - alexn.org alexn.org/blog/2016/08/25/monix-task-performance.html 26 Jun 2014 val f = Future { /*this block executes in another thread*/ } As this is Scala, let's use the DynamicVariable class instead of Java's ThreadLocal directly. When I was working with Finagle, Twitter's Futures had ThreadLocal Like Scala and Java, C# also makes the distinction between the future and promise the computation vs Explicit promises where we have to trigger the resolution of future C++ inspired by the implementation of Futures by Twitter for Scala. 2015年2月20日 applyの挙動がscala.concurrentと違う. TL;DR. com.twitter.util.Future はそれだけ ではasyncで実行しない。 FuturePool As far as I can tell the main difference that could go in favor of using Twitter's Future is that it can be cancelled, unlike scala's Future. Also, there used to be some support for tracing the call chains (as you probably know plain stack traces are close to being useless when using Futures). Effective Scala contains a section discussing futures; As of Scala 2.10, the Scala standard library has its own futures implementation and API, described here. Note that this is largely similar to the API used in Finagle (com.twitter.util.Future), but there are still some naming differences.
An Executor returns a Future. If you use the Finagle RPC system, you use Future instances to hold results that might not have arrived yet. A FutureTask is a Runnable and is designed to be run by an Executor. val future = new FutureTask[String](new Callable[String]() { def call(): String = { searcher.search(target); }}) executor.execute(future)
2015年2月20日 applyの挙動がscala.concurrentと違う. TL;DR. com.twitter.util.Future はそれだけ ではasyncで実行しない。 FuturePool As far as I can tell the main difference that could go in favor of using Twitter's Future is that it can be cancelled, unlike scala's Future. Also, there used to be some support for tracing the call chains (as you probably know plain stack traces are close to being useless when using Futures). Effective Scala contains a section discussing futures; As of Scala 2.10, the Scala standard library has its own futures implementation and API, described here. Note that this is largely similar to the API used in Finagle (com.twitter.util.Future), but there are still some naming differences. Converting a Twitter future to a Scala Future. GitHub Gist: instantly share code, notes, and snippets. The following examples show how to use com.twitter.util.Future.These examples are extracted from open source projects. You can vote up the examples you like and your votes will be used in our system to produce more good examples. Wonderful reusable code from Twitter. Contribute to twitter/util development by creating an account on GitHub. util / util-core / src / main / scala / com / twitter / util / Future.scala. Find file Copy path mosesn util-core: Provide Future#toCompletableFuture 2642791 Dec 5, 2019. Scala continues to grow at a faster rate internally then any other language, and is ~50% of Twitter's backend codebase. Source: I work there. Enjoy productive Java with IntelliJ IDEA. Discover instant and clever code completion, on-the-fly code analysis, and reliable refactoring tools.
Wrapping something in a Future It might take a very long time to fetch a User from the database (suppose we are using a distributed database so it might take anywhere from a milisecond (cache hit) to a few seconds) so we wrap it in a Future so that whoever is using this method knows that this might take some take so they can press on with other computations while this get processed.
Convert a Twitter Future to a Java native CompletableFuture. This should match the semantics of a Java Future as closely as possible to avoid issues with the way another API might use them. At the same time, its semantics should be similar to those of a Twitter Future, so it propagates cancellation. See: Futures. A Future is an object holding a value which may become available at some point. This value is usually the result of some other computation: If the computation has not yet completed, we say that the Future is not completed.
26 Jun 2014 val f = Future { /*this block executes in another thread*/ } As this is Scala, let's use the DynamicVariable class instead of Java's ThreadLocal directly. When I was working with Finagle, Twitter's Futures had ThreadLocal Like Scala and Java, C# also makes the distinction between the future and promise the computation vs Explicit promises where we have to trigger the resolution of future C++ inspired by the implementation of Futures by Twitter for Scala. 2015年2月20日 applyの挙動がscala.concurrentと違う. TL;DR. com.twitter.util.Future はそれだけ ではasyncで実行しない。 FuturePool As far as I can tell the main difference that could go in favor of using Twitter's Future is that it can be cancelled, unlike scala's Future. Also, there used to be some support for tracing the call chains (as you probably know plain stack traces are close to being useless when using Futures).