* **Asynchronous Code**
* **`async` and `await`**
* **Coroutines**

## Asynchronous Code { #asynchronous-code }

Asynchronous code just means that the language 💬 has a way to tell the computer / program 🤖 that at some point in the code, it 🤖 will have to wait for *something else* to finish somewhere else. Let's say that *something else* is called "slow-file" 📝.

            this.next.setTreeId(treeId);
        }
    }

    /**
     * Gets the asynchronous identifier for this message.
     *
     * @return the asyncId
     */
    public final long getAsyncId() {
        return this.asyncId;
    }

    /**
     * Sets the asynchronous identifier for this message.
     *
     * @param asyncId
     *            the asyncId to set
     */

        }

        /**
         * Gets the future for asynchronous notification completion
         * @return the notification future
         */
        public CompletableFuture<Void> getNotificationFuture() {
            return notificationFuture;
        }

        /**
         * Sets the future for asynchronous notification completion
         * @param future the notification future to set

   * was run [asynchronously][Call.enqueue] or [synchronously][Call.execute]. Asynchronous calls
   * become idle after the [onResponse][Callback.onResponse] or [onFailure][Callback.onFailure]
   * callback has returned. Synchronous calls become idle once [execute()][Call.execute] returns.
   * This means that if you are doing synchronous calls the network layer will not truly be idle

        log.info("Minimum log level set to {}", level);
    }

    /**
     * Enable or disable asynchronous logging
     *
     * @param enable true to enable async logging
     */
    public void setAsyncLogging(boolean enable) {
        this.asyncLogging = enable;
        log.info("Asynchronous logging {}", enable ? "enabled" : "disabled");
    }

    /**
     * Configure rate limiting
     *

- **Flexible Text Processing**: Configurable converters and normalizers for text transformation
- **OpenSearch Integration**: Seamless integration with OpenSearch/Elasticsearch clusters
- **Asynchronous Operations**: Non-blocking suggestion requests with callback support
- **Index Management**: Automatic index creation, switching, and maintenance

        // Shutdown scheduler
        scheduler.shutdown();

        // Close RPC client
        if (rpcClient != null) {
            rpcClient.close();
        }
    }

    /**
     * Starts asynchronous notification monitoring for a registration.
     *
     * @param registration the witness registration
     */
    private void startAsyncNotificationMonitoring(WitnessRegistration registration) {

要讓 `await` 運作，它必須位於支持非同步功能的函式內。為此，只需使用 `async def` 宣告函式：

```Python hl_lines="1"
async def get_burgers(number: int):
    # Do some asynchronous stuff to create the burgers
    return burgers
```

...而不是 `def`:

```Python hl_lines="2"
# This is not asynchronous
def get_sequential_burgers(number: int):
    # Do some sequential stuff to create the burgers
    return burgers
```

    /** The time manager for handling time-related operations. */
    @Resource
    private TimeManager timeManager;

    /** The async manager for handling asynchronous operations. */
    @Resource
    private AsyncManager asyncManager;

    /** The session manager for handling user sessions. */
    @Resource
    private SessionManager sessionManager;

            }

            return response;

        } catch (Exception e) {
            throw new IOException("Witness heartbeat RPC failed", e);
        }
    }

    /**
     * Requests asynchronous notifications from the witness service.
     *
     * @param contextHandle the context handle from registration
     * @return the async notify response containing notifications