## The normal **FastAPI** app

Let's first see how the normal API app would look like before adding the callback.

It will have a *path operation* that will receive an `Invoice` body, and a query parameter `callback_url` that will contain the URL for the callback.

			if contextCanceled(ctx) {
				w.WriteHeader(499)
				return
			}
			f.ServeHTTP(w, r)
		case <-r.Context().Done():
			globalHTTPStats.addRequestsInQueue(-1)
			// When the client disconnects before getting the S3 handler
			// status code response, set the status code to 499 so this request
			// will be properly audited and traced.
			w.WriteHeader(499)
		default:
			globalHTTPStats.addRequestsInQueue(-1)

import org.junit.jupiter.api.extension.ReflectiveInvocationContext
import org.openjsse.net.ssl.OpenJSSE
import org.opentest4j.TestAbortedException

/**
 * Marks a test as Platform aware, before the test runs a consistent Platform will be
 * established e.g. SecurityProvider for Conscrypt installed.
 *
 * Also allows a test file to state general platform assumptions, or for individual test.
 */

     * StackOverflowError (from deep transform(..., directExecutor()) nesting), and calling
     * setException(stackOverflowError) would fail:
     *
     * - If the stack overflowed before set()/setValue() could even store the result in the output
     * Future, then a call setException() would likely also overflow.
     *
     * - If the stack overflowed after set()/setValue() stored its result, then a call to

        // padding is alwas binary 1 followed by binary 0s
        byte[] tail = new byte[padLen + 8];
        tail[0] = (byte)0x80;

        // append length before final transform:
        // save number of bits, casting the long to an array of 8 bytes
        // save low-order byte first.
        for (int i = 0; i < 8; i++)

    while (read(skipBuffer, 8192) != -1L) {
      skipBuffer.clear()
    }
    true // Success! The source has been exhausted.
  } catch (_: InterruptedIOException) {
    false // We ran out of time before exhausting the source.
  } finally {
    if (originalDurationNs == Long.MAX_VALUE) {
      timeout().clearDeadline()
    } else {
      timeout().deadlineNanoTime(nowNs + originalDurationNs)
    }
  }
}

   *
   * <p>Returns without doing anything if another thread is currently loading the value for {@code
   * key}. If the cache loader associated with this cache performs refresh asynchronously then this
   * method may return before refresh completes.
   *
   * @since 11.0
   */
  void refresh(K key);

  /**
   * {@inheritDoc}
   *

Claims ## ref: http://kubernetes.io/docs/user-guide/persistent-volumes/ ## persistence: enabled: true annotations: {} ## A manually managed Persistent Volume and Claim ## Requires persistence.enabled: true ## If defined, PVC must be created manually before volume will be bound existingClaim: "" ## minio data Persistent Volume Storage Class ## If defined, storageClassName: <storageClass> ## If set to "-", storageClassName: "", which disables dynamic provisioning ## If undefined (the default) or set to...

Claims ## ref: http://kubernetes.io/docs/user-guide/persistent-volumes/ ## persistence: enabled: true annotations: {} ## A manually managed Persistent Volume and Claim ## Requires persistence.enabled: true ## If defined, PVC must be created manually before volume will be bound existingClaim: "" ## minio data Persistent Volume Storage Class ## If defined, storageClassName: <storageClass> ## If set to "-", storageClassName: "", which disables dynamic provisioning ## If undefined (the default) or set to...

Claims ## ref: http://kubernetes.io/docs/user-guide/persistent-volumes/ ## persistence: enabled: true annotations: {} ## A manually managed Persistent Volume and Claim ## Requires persistence.enabled: true ## If defined, PVC must be created manually before volume will be bound existingClaim: "" ## minio data Persistent Volume Storage Class ## If defined, storageClassName: <storageClass> ## If set to "-", storageClassName: "", which disables dynamic provisioning ## If undefined (the default) or set to...