// It's definitely safe to multiply into numerator and denominator.
              numerator *= n;
              denominator *= i;
              numeratorBits += nBits;
            } else {
              // It might not be safe to multiply into numerator and denominator,
              // so multiply (numerator / denominator) into result.

  }

  /**
   * Returns the number of times {@link Cache} lookup methods have returned an uncached (newly
   * loaded) value, or null. Multiple concurrent calls to {@link Cache} lookup methods on an absent
   * value can result in multiple misses, all returning the results of a single cache load
   * operation.
   */
  public long missCount() {
    return missCount;
  }

  /**

<div class="screenshot">
<img src="/img/tutorial/sql-databases/image01.png">
</div>

## Update the App with Multiple Models { #update-the-app-with-multiple-models }

Now let's **refactor** this app a bit to increase **security** and **versatility**.

The client (browser) will know that the response comes from the correct server because it is using the cryptography they agreed using the **HTTPS certificate** before.

### Multiple Applications { #multiple-applications }

In the same server (or servers), there could be **multiple applications**, for example, other API programs or a database.

## Dependencies for groups of *path operations* { #dependencies-for-groups-of-path-operations }

        assertEquals("NTLM", request.getAuthType());
        verify(mockPrincipal, times(1)).getName();
    }

    @ParameterizedTest
    @ValueSource(strings = { "", "   ", "unknown" })
    @DisplayName("supports multiple principal name variants")
    void testPrincipalNameVariants(String name, @Mock HttpServletRequest mockRequest, @Mock Principal mockPrincipal) {
        when(mockPrincipal.getName()).thenReturn(name);

They tend to require more complex configurations, a message/job queue manager, like RabbitMQ or Redis, but they allow you to run background tasks in multiple processes, and especially, in multiple servers.

But if you need to access variables and objects from the same **FastAPI** app, or you need to perform small background tasks (like sending an email notification), you can simply just use `BackgroundTasks`.

### Phase 3: Multi-Channel Support
**Priority: MEDIUM** | **Estimated Effort: 5-6 weeks**

Multi-channel enables using multiple network connections for improved performance and reliability.

#### 3.1 Core Multi-Channel Infrastructure
```
Package: jcifs.internal.smb2.multichannel
├── ChannelManager.java           - Manage multiple channels per session
├── ChannelBinding.java           - Channel binding and security

Por exemplo (dependendo de sua configuração), você poderia ter alguma ferramenta como um exportador do Prometheus no mesmo contêiner que deve ter acesso a **cada uma das solicitações** que chegam.

            assertEquals(0, init.getContextFlags());
        }

        @Test
        @DisplayName("Multiple flags can be combined correctly")
        void testMultipleFlagsCombination() {
            NegTokenInit init = new NegTokenInit();

            // Set multiple flags
            init.setContextFlag(NegTokenInit.DELEGATION, true);
            init.setContextFlag(NegTokenInit.INTEGRITY, true);