}

    @Override
    protected Class<? extends Group> typeOfSelectedEntity() {
        return Group.class;
    }

    @Override
    protected Class<Group> typeOfHandlingEntity() {
        return Group.class;
    }

    @Override
    protected Class<GroupCB> typeOfHandlingConditionBean() {
        return GroupCB.class;
    }

    }

    @Override
    protected Class<? extends AccessToken> typeOfSelectedEntity() {
        return AccessToken.class;
    }

    @Override
    protected Class<AccessToken> typeOfHandlingEntity() {
        return AccessToken.class;
    }

    @Override
    protected Class<AccessTokenCB> typeOfHandlingConditionBean() {
        return AccessTokenCB.class;
    }

    }

    @Override
    protected Class<? extends DuplicateHost> typeOfSelectedEntity() {
        return DuplicateHost.class;
    }

    @Override
    protected Class<DuplicateHost> typeOfHandlingEntity() {
        return DuplicateHost.class;
    }

    @Override
    protected Class<DuplicateHostCB> typeOfHandlingConditionBean() {
        return DuplicateHostCB.class;
    }

    }

    @Override
    protected Class<? extends ElevateWord> typeOfSelectedEntity() {
        return ElevateWord.class;
    }

    @Override
    protected Class<ElevateWord> typeOfHandlingEntity() {
        return ElevateWord.class;
    }

    @Override
    protected Class<ElevateWordCB> typeOfHandlingConditionBean() {
        return ElevateWordCB.class;
    }

    }

    @Override
    protected Class<? extends KeyMatch> typeOfSelectedEntity() {
        return KeyMatch.class;
    }

    @Override
    protected Class<KeyMatch> typeOfHandlingEntity() {
        return KeyMatch.class;
    }

    @Override
    protected Class<KeyMatchCB> typeOfHandlingConditionBean() {
        return KeyMatchCB.class;
    }

    }

    @Override
    protected Class<? extends RequestHeader> typeOfSelectedEntity() {
        return RequestHeader.class;
    }

    @Override
    protected Class<RequestHeader> typeOfHandlingEntity() {
        return RequestHeader.class;
    }

    @Override
    protected Class<RequestHeaderCB> typeOfHandlingConditionBean() {
        return RequestHeaderCB.class;
    }

    }

    @Override
    protected Class<? extends FileConfig> typeOfSelectedEntity() {
        return FileConfig.class;
    }

    @Override
    protected Class<FileConfig> typeOfHandlingEntity() {
        return FileConfig.class;
    }

    @Override
    protected Class<FileConfigCB> typeOfHandlingConditionBean() {
        return FileConfigCB.class;
    }

    future.cancel(true);
    assertThrows(CancellationException.class, () -> getUnchecked(future));
  }

  public void testGetUnchecked_executionExceptionChecked() {
    UncheckedExecutionException expected =
        assertThrows(
            UncheckedExecutionException.class, () -> getUnchecked(FAILED_FUTURE_CHECKED_EXCEPTION));
    assertEquals(CHECKED_EXCEPTION, expected.getCause());
  }

    future.cancel(true);
    assertThrows(CancellationException.class, () -> getUnchecked(future));
  }

  public void testGetUnchecked_executionExceptionChecked() {
    UncheckedExecutionException expected =
        assertThrows(
            UncheckedExecutionException.class, () -> getUnchecked(FAILED_FUTURE_CHECKED_EXCEPTION));
    assertEquals(CHECKED_EXCEPTION, expected.getCause());
  }

Docker 一直是创建和管理**容器镜像**和**容器**的主要工具之一。

还有一个公共 <a href="https://hub.docker.com/" class="external-link" target="_blank">Docker Hub</a> ，其中包含预制的 **官方容器镜像**, 适用于许多工具、环境、数据库和应用程序。

例如，有一个官方的 <a href="https://hub.docker.com/_/python" class="external-link" target="_blank">Python 镜像</a>。

还有许多其他镜像用于不同的需要（例如数据库），例如：


* <a href="https://hub.docker.com/_/postgres" class="external-link" target="_blank">PostgreSQL</a>