buf.append(URLEncoder.encode(String.valueOf(c), Constants.UTF_8));
                } catch (final UnsupportedEncodingException e) {
                    // UTF-8 should always be supported, but log if it somehow isn't
                    logger.warn("UTF-8 encoding not supported - this should not happen: char={}", c, e);
                }
            }
        }

import static com.google.common.base.Preconditions.checkPositionIndexes;
import static com.google.common.base.Preconditions.checkState;
import static com.google.common.math.IntMath.divide;
import static com.google.common.math.IntMath.log2;
import static java.lang.Math.max;
import static java.lang.Math.min;
import static java.math.RoundingMode.CEILING;
import static java.math.RoundingMode.FLOOR;
import static java.math.RoundingMode.UNNECESSARY;

        return UUID.randomUUID().toString().replace("-", StringUtil.EMPTY);
    }

    /**
     * Updates the user session with the provided user code.
     * This method registers the user info with the search log helper and updates the cookie.
     *
     * @param userCode the user code to associate with the session
     */
    protected void updateUserSessionId(final String userCode) {

    the mojo to the lifecycle.

    In this case, the client is <<online>>, and the mojo either requires
    <<online>> status, or else doesn't care.

  * Otherwise, don't bind the mojo. Log a debug message to indicate that it is
    sensitive the online state of the application, and that this state is
    currently wrong for execution.

    <<NOTE:>> Do we want to fail when we cannot bind a mojo to the lifecycle

pkg image/gif, type GIF struct, Config image.Config
pkg image/gif, type GIF struct, Disposal []uint8
pkg io, func CopyBuffer(Writer, Reader, []uint8) (int64, error)
pkg log, const LUTC = 32
pkg log, const LUTC ideal-int
pkg log, func Output(int, string) error
pkg log, method (*Logger) SetOutput(io.Writer)
pkg math/big, const Above = 1
pkg math/big, const Above Accuracy
pkg math/big, const AwayFromZero = 3

### `shutdown` 이벤트

애플리케이션이 종료될 때 실행되어야 하는 함수를 추가하려면, `"shutdown"` 이벤트로 선언합니다:

{* ../../docs_src/events/tutorial002.py hl[6] *}

여기서, `shutdown` 이벤트 핸들러 함수는 `"Application shutdown"`이라는 텍스트를 `log.txt` 파일에 기록합니다.

/// info | 정보

`open()` 함수에서 `mode="a"`는 "추가"를 의미하므로, 파일에 있는 기존 내용은 덮어쓰지 않고 새로운 줄이 추가됩니다.

///

/// tip | 팁

이 경우, 우리는 표준 파이썬 `open()` 함수를 사용하여 파일과 상호작용하고 있습니다.

				o.pool, o.set = 0, 0
			}
		}
		if IsErr(err, []error{
			nil,
			context.Canceled,
			context.DeadlineExceeded,
			// io.EOF is expected and should be returned but no need to log it.
			io.EOF,
		}...) {
			// Expected good errors we don't need to return error.
			return entries, err
		}
		entries.truncate(0)
		go func() {

    taskRunner.newQueue().execute(toString(), cancelable = false) {
      try {
        logger.fine("$this starting to accept connections")
        acceptConnections()
      } catch (e: Throwable) {
        logger.log(Level.WARNING, "$this failed unexpectedly", e)
      }

      // Release all sockets and all threads, even if any close fails.
      serverSocket?.closeQuietly()

import org.codelibs.fess.app.web.admin.keymatch.AdminKeymatchAction;
import org.codelibs.fess.app.web.admin.labeltype.AdminLabeltypeAction;
import org.codelibs.fess.app.web.admin.log.AdminLogAction;
import org.codelibs.fess.app.web.admin.maintenance.AdminMaintenanceAction;
import org.codelibs.fess.app.web.admin.pathmap.AdminPathmapAction;
import org.codelibs.fess.app.web.admin.plugin.AdminPluginAction;

**FastAPI** 支持多个事件处理器函数。

只有所有 `startup` 事件处理器运行完毕，**FastAPI** 应用才开始接收请求。

### `shutdown` 事件

使用 `shutdown` 事件声明 `app` 关闭时运行的函数：

{* ../../docs_src/events/tutorial002.py hl[6] *}

此处，`shutdown` 事件处理器函数在 `log.txt` 中写入一行文本 `Application shutdown`。

/// info | 说明

`open()` 函数中，`mode="a"` 指的是**追加**。因此这行文本会添加在文件已有内容之后，不会覆盖之前的内容。

///

/// tip | 提示

注意，本例使用 Python `open()` 标准函数与文件交互。