```

We make a couple calls:

```java
Request request = new Request.Builder()
    .url("https://publicobject.com/helloworld.txt")
    .build();

System.out.println("REQUEST 1 (new connection)");
try (Response response = client.newCall(request).execute()) {
  // Consume and discard the response body.
  response.body().source().readByteString();
}

System.out.println("REQUEST 2 (pooled connection)");

 *
 * <p>The size of the data structure used by {@link ArrayBasedCharEscaper} is proportional to the
 * highest valued character that requires escaping. For example a replacement map containing the
 * single character '{@code \}{@code u1000}' will require approximately 16K of memory. If you need
 * to create multiple escaper instances that have the same character replacement mapping consider
 * using {@link ArrayBasedEscaperMap}.

                try {
                    // Send SMB2 Change Notify request
                    Smb2ChangeNotifyRequest request = new Smb2ChangeNotifyRequest();
                    request.setFileId(handle.directoryFile.getFileId());
                    request.setCompletionFilter(getNotificationFilter());
                    request.setWatchTree(false);  // Non-recursive for now
                    

    flags: Int,
  ) {
    if (type != TYPE_WINDOW_UPDATE && logger.isLoggable(FINE)) {
      logger.fine(frameLog(false, streamId, length, type, flags))
    }
    require(length <= maxFrameSize) { "FRAME_SIZE_ERROR length > $maxFrameSize: $length" }
    require(streamId and 0x80000000.toInt() == 0) { "reserved bit set: $streamId" }
    sink.writeMedium(length)
    sink.writeByte(type and 0xff)
    sink.writeByte(flags and 0xff)

 * **PushPromise**: headers, method, path, response
 * **Request**: body, cacheControl, headers, method, url
 * **Response**: body, cacheControl, cacheResponse, code, handshake, headers, message,
   networkResponse, priorResponse, protocol, receivedResponseAtMillis, request, sentRequestAtMillis
 * **Route**: address, proxy, socketAddress
 * **TlsVersion**: javaName

The same models are shared among requests, so, it's not one model per request, or one per user or something similar.

Let's imagine that loading the model can **take quite some time**, because it has to read a lot of **data from disk**. So you don't want to do it for every request.

Якщо використовувати лише `BackgroundTasks` (а не `BackgroundTask`), то його можна передавати як параметр у *функції операції шляху*, і **FastAPI** подбає про все інше, так само як і про використання об'єкта `Request`.

Також можна використовувати `BackgroundTask` окремо в FastAPI, але для цього Вам доведеться створити об'єкт у коді та повернути Starlette `Response`, включаючи його.

    ```java
      private final OkHttpClient client = new OkHttpClient();

      public void run() throws Exception {
        Request request = new Request.Builder()
            .url("https://publicobject.com/helloworld.txt")
            .build();

        try (Response response = client.newCall(request).execute()) {
          if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

If not specified and the dependency has `yield`, it will have a `scope` of `"request"` by default.

### `scope` for sub-dependencies { #scope-for-sub-dependencies }

When you declare a dependency with a `scope="request"` (the default), any sub-dependency needs to also have a `scope` of `"request"`.

            try {
                principal = getAuthenticator().authenticate(request, spnegoResponse);
                if (logger.isDebugEnabled()) {
                    logger.debug("principal={}", principal);
                }
            } catch (final Exception e) {
                final String msg = "Failed to process Authorization Header: " + request.getHeader(Constants.AUTHZ_HEADER);
                if (logger.isDebugEnabled()) {