* backend

* GitHub discussion
* GitHub issue

* performance
* performance optimization

* return type
* return value

* security
* security scheme

* task
* background task
* task function

* template
* template engine

* type annotation
* type hint

* server worker
* Uvicorn worker
* Gunicorn Worker
* worker process
* worker class
* workload

---
name: Question
about: Use Stack Overflow instead
title: "\U0001F649"
labels: ''
assignees: ''

---

🛑 𝙎𝙏𝙊𝙋

This issue tracker is not the place for questions!

If you want to ask how to do something, or to understand why something isn't working the way you expect it to, use Stack Overflow. https://stackoverflow.com/questions/tagged/okhttp

import java.nio.file.Files;
import java.util.List;
import java.util.function.Consumer;

import static org.objectweb.asm.Opcodes.ACC_PRIVATE;
import static org.objectweb.asm.Opcodes.ACC_PUBLIC;

/**
 * A task to manipulate an existing class file.
 */
public class JavaClassPublicifier extends DefaultTask {

    private List<String> classFiles;
    private DirectoryProperty inputDir;
    private DirectoryProperty outputDir;

  // name is
  // 'main'. Work around this by creating a 'main' source set that forwards to 'jvmMain'.
  //
  // The forwarding SourceSet also needs to fake out some task names to prevent them from
  // being
  // registered twice.
  //
  // https://github.com/bndtools/bnd/issues/6590
  val mainSourceSet = BndBuildAction.installWorkaround(project)

{* ../../docs_src/background_tasks/tutorial001_py310.py hl[1,13] *}

**FastAPI** は、`BackgroundTasks` 型のオブジェクトを作成し、そのパラメーターに渡します。

## タスク関数の作成 { #create-a-task-function }

バックグラウンドタスクとして実行される関数を作成します。

これは、パラメーターを受け取ることができる単なる標準的な関数です。

これは `async def` または通常の `def` 関数であり、**FastAPI** はこれを正しく処理します。

ここで、タスク関数はファイル書き込みを実行します (メール送信のシミュレーション)。

HSPLokhttp3/internal/concurrent/TaskQueue;->schedule$default(Lokhttp3/internal/concurrent/TaskQueue;Lokhttp3/internal/concurrent/Task;JI)V
HSPLokhttp3/internal/concurrent/TaskQueue;->schedule(Lokhttp3/internal/concurrent/Task;J)V
HSPLokhttp3/internal/concurrent/TaskQueue;->scheduleAndDecide$okhttp(Lokhttp3/internal/concurrent/Task;JZ)Z
HSPLokhttp3/internal/concurrent/TaskQueue;->shutdown()V

blank_issues_enabled: false

contact_links:

  - name: Project Mailing Lists
    url: https://maven.apache.org/mailing-lists.html

          }
        });
  }

  private long doMultithreadedLoop(Callable<Long> task)
      throws InterruptedException, ExecutionException {

    List<Future<Long>> futures = Lists.newArrayListWithCapacity(threads);
    for (int i = 0; i < threads; i++) {
      futures.add(threadPool.submit(task));
    }
    long total = 0;
    for (Future<Long> future : futures) {
      total += future.get();

import java.util.concurrent.TimeUnit
import okhttp3.Address
import okhttp3.ConnectionPool
import okhttp3.Route
import okhttp3.internal.closeQuietly
import okhttp3.internal.concurrent.Task
import okhttp3.internal.concurrent.TaskQueue
import okhttp3.internal.concurrent.TaskRunner
import okhttp3.internal.concurrent.assertLockHeld
import okhttp3.internal.concurrent.withLock

        } catch (IOException e) {
            throw new IllegalStateException("unable to read the file " + file + " attributes", e);
        }
    }

    /**
     * Returns the files this task will check
     */
    @InputFiles
    @SkipWhenEmpty
    public FileCollection getFiles() {
        return getSources().get()
            .stream()
            .map(sourceTree -> sourceTree.matching(filesFilter))