assertHasErrors("Method com.example.Task.getFailOnError(): Is not annotated with @since 2.0.")
            assertHasAccepted(
                "Method com.example.Task.getFailOnError(): Is not annotated with @Incubating. Reason for accepting this: Upgraded property" to listOf("Method added to public class", "Abstract method has been added to this class"),

  /** How many times a new task has been started. Guarded by [TaskRunner.lock]. */
  private var contextSwitchCount = 0

  /** Guarded by [TaskRunner.lock]. */
  private var activeThreads = 0

  /** A task runner that posts tasks to this fake. Tasks won't be executed until requested. */
  val taskRunner: TaskRunner =
    TaskRunner(
      object : TaskRunner.Backend {
        override fun execute(
          taskRunner: TaskRunner,

      startAnotherThread()
    }
  }

  private fun beforeRun(task: Task) {
    lock.assertHeld()

    task.nextExecuteNanoTime = -1L
    val queue = task.queue!!
    queue.futureTasks.remove(task)
    readyQueues.remove(queue)
    queue.activeTask = task
    busyQueues.add(queue)
  }

  private fun runTask(task: Task) {
    val currentThread = Thread.currentThread()

      "FINE: Q10000 scheduled after 100 µs: task",
      "FINE: Q10000 starting              : task",
      "FINE: Q10000 run again after  50 µs: task",
      "FINE: Q10000 finished run in   0 µs: task",
      "FINE: Q10000 starting              : task",
      "FINE: Q10000 run again after 150 µs: task",
      "FINE: Q10000 finished run in   0 µs: task",
      "FINE: Q10000 starting              : task",

import org.gradle.tooling.events.FinishEvent
import org.gradle.tooling.events.OperationCompletionListener
import org.gradle.tooling.events.task.TaskFailureResult
import org.gradle.tooling.events.task.TaskFinishEvent
import org.gradle.tooling.events.task.TaskSuccessResult
import java.io.File
import java.io.FileOutputStream
import java.io.IOException
import java.nio.charset.StandardCharsets
import java.nio.file.Files

It's called "asynchronous" because the computer / program doesn't have to be "synchronized" with the slow task, waiting for the exact moment that the task finishes, while doing nothing, to be able to take the task result and continue the work.

            "--continue",
            "--no-watch-fs"
        ).buildAndFail()
        assertEquals(TaskOutcome.SUCCESS, result.task(":successful-report:test")!!.outcome)
        assertEquals(TaskOutcome.FAILED, result.task(":failed-report-with-leftover:test")!!.outcome)
        assertEquals(TaskOutcome.FAILED, result.task(":failed-test-with-leftover:test")!!.outcome)

  private val cleanupQueue: TaskQueue = taskRunner.newQueue()
  private val cleanupTask =
    object : Task("$okHttpName ConnectionPool connection closer") {
      override fun runOnce(): Long = closeConnections(System.nanoTime())
    }

  private fun AddressState.scheduleOpener() {
    queue.schedule(
      object : Task("$okHttpName ConnectionPool connection opener") {

3. Make sure the file with accepted changes is sorted.\
Use the `./gradlew :architecture-test:sortAcceptedApiChanges` task to sort the file.

4. Validate your changes before committing.\
Run the `./gradlew sanityCheck` task again to make sure there are no more errors.

#### Filtering changes by severity

    operation ->> client: Return response to client
    Note over client,operation: Response is already sent, can't change it anymore
    opt Tasks
        operation -->> tasks: Send background tasks
    end
    opt Raise other exception
        tasks -->> tasks: Handle exceptions in the background task code
    end
```

!!! info