te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>Spring Boot: Warning 'Return value of the method is never used' on Logout Endpoint - Stack Overflow

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    Spring Boot: Warning 'Return value of the method is never used' on Logout Endpoint - Stack Overflow

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    Context

    I'm implementing a logout feature in my Spring Boot application that clears an authentication cookie and returns a success message:

    @RestController
@RequestMapping("/auth")
public class AuthController {

// ... constructor and other endpoints

    @PostMapping("/private/logout")
    public LogoutResponse logout(HttpServletResponse response) {
        log.info("[AUTH] User logging out.");
        jwtUtils.clearTokenCookie(response);
        return new LogoutResponse("Logout Successful!");
    }
}

    This works fine in Postman—I receive the expected JSON response:

    {
  "message": "Logout Successful!"
}

    Issue

    However, my IDE (IntelliJ IDEA 2024.1.2 (Community Edition)) is showing a warning:

    "Return value of the method is never used"

    What I've Considered

    1. Could this be due to Spring Security filters interfering with the response?
    2. Since I'm modifying cookies via HttpServletResponse, could this affect Spring Boot’s handling of the response?
    3. I tried using ResponseEntity, but the warning persists:
    @PostMapping("/private/logout")
public ResponseEntity<LogoutResponse> logout(HttpServletResponse response) {
    jwtUtils.clearTokenCookie(response);
    return ResponseEntity.ok(new LogoutResponse("Logout Successful!"));
}

    I suspect I can just ignore this warning, but I’m curious:

    1. Why does Spring Boot think the return value is unused?
    2. Does modifying HttpServletResponse interfere with Spring's response handling?
    3. Is there a best practice for structuring logout endpoints that modify cookies?

    Would appreciate any insights, Cheers!

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