* entries may be counted in {@link Cache#size}, but will never be visible to read or write
 * operations.
 *
 * <p>Certain cache configurations will result in the accrual of periodic maintenance tasks which
 * will be performed during write operations, or during occasional read operations in the absence of
 * writes. The {@link Cache#cleanUp} method of the returned cache will also perform maintenance, but

servers:
  - url: http://localhost:8080/api/v1
tags:
  - name: search
    description: Search operations
  - name: popularword
    description: Popular word operations
  - name: monitor
    description: Monitoring operations
  - name: suggest
    description: Suggest operations
  - name: favorite
    description: Favorite operations
paths:
  /documents:
    get:
      tags:
        - search

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)。

また、書き込み操作では `async` と `await` を使用しないため、通常の `def` で関数を定義します。

```Python hl_lines="6-9"
{!../../docs_src/background_tasks/tutorial001.py!}
```

## バックグラウンドタスクの追加

*path operations 関数* 内で、`.add_task()` メソッドを使用してタスク関数を *background tasks* オブジェクトに渡します。

```Python hl_lines="14"
{!../../docs_src/background_tasks/tutorial001.py!}
```

`.add_task()` は以下の引数を受け取ります:

  optional string scope = 4;
}

// RuleWithOperations is a tuple of Operations and Resources. It is recommended to make
// sure that all the tuple expansions are valid.
message RuleWithOperations {
  // Operations is the operations the admission hook cares about - CREATE, UPDATE, DELETE, CONNECT or *
  // for all of those operations and any future admission operations that are added.
  // If '*' is present, the length of the slice must be one.

    implements Multiset<E> {
  // Query Operations

  @Override
  public boolean isEmpty() {
    return entrySet().isEmpty();
  }

  @Override
  public boolean contains(@CheckForNull Object element) {
    return count(element) > 0;
  }

  // Modification Operations
  @CanIgnoreReturnValue
  @Override
  public final boolean add(@ParametricNullness E element) {

### Top-level application

First, create the main, top-level, **FastAPI** application, and its *path operations*:

```Python hl_lines="3  6-8"
{!../../docs_src/sub_applications/tutorial001.py!}
```

### Sub-application

Then, create your sub-application, and its *path operations*.

This sub-application is just another standard FastAPI application, but this is the one that will be "mounted":

<img src="/img/tutorial/path-operation-configuration/image04.png">

Check how deprecated and non-deprecated *path operations* look like:

<img src="/img/tutorial/path-operation-configuration/image05.png">

## Recap

 *      <code>WriteFile</code>, and <code>CloseFile</code> A byte-type pipe can
 *      be opened, written to, read from and closed using the standard Win32
 *      file operations.
 * </ul>
 *
 * <p>The jCIFS API maps all of these operations into the standard Java
 * <code>XxxputStream</code> interface. A special <code>PIPE_TYPE</code>
 * flags is necessary to distinguish which type of Named Pipe behavior
 * is desired.
 *

    "crossVersionTests": false
  },
  {
    "name": "build-operations",
    "path": "platforms/core-runtime/build-operations",
    "unitTests": true,
    "functionalTests": false,
    "crossVersionTests": false
  },
  {
    "name": "build-operations-trace",
    "path": "platforms/core-runtime/build-operations-trace",
    "unitTests": false,
    "functionalTests": false,

			Optional:    true,
			Type:        "duration",
		},
		config.HelpKV{
			Key:         apiListQuorum,
			Description: `set the acceptable quorum expected for list operations e.g. "optimal", "reduced", "disk", "strict", "auto"` + defaultHelpPostfix(apiListQuorum),
			Optional:    true,
			Type:        "string",
		},
		config.HelpKV{
			Key:         apiReplicationPriority,