handlers thereby breaking the potential ownership cycle Service objects are owned by an ExecutionContext ExecutionContext destroys all services (and therefore completion handlers) as its lifetime ends struct ion::executor> Outstanding Work ExecutionContext provides an environment in which nullary-invocable objects are invoked If there are pending objects ExecutionContext still has work to do When there initiated by basic_async_event::async_wait does not immediately submit work to any ExecutionContext ExecutionContext may therefore run out of work and stop before asynchronous operation completes outstanding_work

Fields - Query Types - Database and its subclasses - Transaction, Savepoint and ExecutionContext - Metadata Types - Misc - Hacks - Optimistic Locking - Top object per group is desirable, but if you would like to manually manage multiple connections you can create an ExecutionContext. Execution contexts allow finer-grained control over managing multiple connections to the database returns. If you are using the peewee connection pool, then the new connections used by the ExecutionContext will be pulled from the pool of available connections and recycled appropriately. ## Using

is desirable, but if you would like to manually manage multiple connections you can create an ExecutionContext. Execution contexts allow finer-grained control over managing multiple connections to the database returns. If you are using the peewee connection pool, then the new connections used by the ExecutionContext will be pulled from the pool of available connections and recycled appropriately. #### 1.6 execution_context ( $ [with_transaction=True] $ ) Create an ExecutionContext context manager or decorator. Blocks wrapped with an ExecutionContext will run using their own connection. By default, the wrapped

object ExampleBlockingScala extends App { //所有并发任务在这个拥有10个线程的线程池中执行 implicit val ec = ExecutionContext.fromExecutorService(Executors.newFixedThreadPool(10)) //创建100个并发任务，每个任务都会阻塞5秒 (1 to c/f/6/8cf6a2ee9e212c6a8409afd0a26b9bd4/p21_2.jpg) ## 创建异步任务就是这么简洁 import scala.concurrent.ExecutionContext.Implicits.global import scala.concurrent.Future import scala.io.StdIn import scala.util.Random to exit <<") StdIn.readLine() } ## 异步任务之间的连续处理也是这么简洁 import scala.concurrent.ExecutionContext.Implicits.global import scala.concurrent.Future import scala.io.StdIn import scala.util.Random

top-level [`execute`](crate::core::execute) and `[`dispatch`](crate::core::dispatch) pub trait ExecutionContext: ValidationContext { /// Called upon successful client creation and update fn store_client_state(