*
 * @author mbechler
 */
public interface CommonServerMessageBlockResponse extends CommonServerMessageBlock, Response {

    /**
     * Checks if this is an asynchronous response.
     *
     * @return is an async response
     */
    boolean isAsync();

    /**
     *
     * @return the next response
     */
    @Override
    CommonServerMessageBlockResponse getNextResponse();

    /**

initial_fake_database = {"rick": "Rick Sanchez"}

fake_database = initial_fake_database.copy()

initial_state = {"except": False, "finally": False}

state = initial_state.copy()

app = FastAPI()


async def get_database():
    temp_database = fake_database.copy()
    try:
        yield temp_database
        fake_database.update(temp_database)
    except HTTPException:
        state["except"] = True
        raise

pkg runtime/pprof, type LabelSet struct
pkg sync, method (*Map) Delete(interface{})
pkg sync, method (*Map) Load(interface{}) (interface{}, bool)
pkg sync, method (*Map) LoadOrStore(interface{}, interface{}) (interface{}, bool)
pkg sync, method (*Map) Range(func(interface{}, interface{}) bool)
pkg sync, method (*Map) Store(interface{}, interface{})
pkg sync, type Map struct

	JetStream         struct {
		Enable bool `json:"enable"`
	} `json:"jetStream"`
	Streaming struct {
		Enable             bool   `json:"enable"`
		ClusterID          string `json:"clusterID"`
		Async              bool   `json:"async"`
		MaxPubAcksInflight int    `json:"maxPubAcksInflight"`
	} `json:"streaming"`

	RootCAs *x509.CertPool `json:"-"`
}

// Validate NATSArgs fields
func (n NATSArgs) Validate() error {

**FastAPI** 会创建一个 `BackgroundTasks` 类型的对象并作为该参数传入。

## 创建一个任务函数

创建要作为后台任务运行的函数。

它只是一个可以接收参数的标准函数。

它可以是 `async def` 或普通的 `def` 函数，**FastAPI** 知道如何正确处理。

在这种情况下，任务函数将写入一个文件（模拟发送电子邮件）。

由于写操作不使用 `async` 和 `await`，我们用普通的 `def` 定义函数：

{* ../../docs_src/background_tasks/tutorial001.py hl[6:9] *}

## 添加后台任务

在你的 *路径操作函数* 里，用 `.add_task()` 方法将任务函数传到 *后台任务* 对象中：

class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None
    tags: set[str] = set()


@app.post("/items/", response_model=Item, summary="Create an item")
async def create_item(item: Item):
    """
    Create an item with all the information:

    - **name**: each item must have a name
    - **description**: a long description
    - **price**: required

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package disk

import (
	"os"
	"syscall"

	"golang.org/x/sys/unix"
)

// Fdatasync - fdatasync() is similar to fsync(), but does not flush modified metadata
// unless that metadata is needed in order to allow a subsequent data retrieval
// to  be  correctly  handled.   For example, changes to st_atime or st_mtime

	eventsSkipped     atomic.Int64
	eventsErrorsTotal atomic.Int64

	sync.RWMutex
	targets map[TargetID]Target
	queue   chan asyncEvent
	ctx     context.Context

	statLock    sync.RWMutex
	targetStats map[TargetID]targetStat
}

type targetStat struct {
	// The number of concurrent async Send calls per targets
	currentSendCalls int64
	// The number of total events per target
	totalEvents int64

	"context"
	"errors"
	"fmt"
	"io"
	"math/rand"
	"net/http"
	"net/url"
	"runtime"
	"sync"
	"time"

	"github.com/cespare/xxhash/v2"
	"github.com/klauspost/compress/zip"
	"github.com/minio/madmin-go/v3"
	xioutil "github.com/minio/minio/internal/ioutil"
	xnet "github.com/minio/pkg/v3/net"
	"github.com/minio/pkg/v3/sync/errgroup"
	"github.com/minio/pkg/v3/workers"

	"github.com/minio/minio/internal/bucket/bandwidth"

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package pubsub

import (
	"bytes"
	"encoding/json"
	"fmt"
	"sync"
	"sync/atomic"
)

// GetByteBuffer returns a byte buffer from the pool.
var GetByteBuffer = func() []byte {
	return make([]byte, 0, 4096)
}

// Sub - subscriber entity.
type Sub[T Maskable] struct {