org.springframework.web.context.request.RequestAttributes#getAttribute ( )源码实例Demo

@Override
public Map<String, Object> getErrorAttributes(RequestAttributes requestAttributes,
		boolean includeStackTrace) {
	Map<String, Object> errorAttributes = super.getErrorAttributes(requestAttributes, includeStackTrace);
	errorAttributes.remove("exception");
	Object message = requestAttributes.getAttribute("javax.servlet.error.message", RequestAttributes.SCOPE_REQUEST);
	if (message != null) {
		errorAttributes.put("message", message);
	}
	return errorAttributes;
}
 

public static WxRequest getWxRequestFromRequest() {
    RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
    if (requestAttributes != null) {
        return (WxRequest) requestAttributes.getAttribute(WX_REQUEST_ATTRIBUTE, RequestAttributes.SCOPE_REQUEST);
    }
    return null;
}
 

public static WxWebUser getWxWebUserFromSession() {
    RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
    if (requestAttributes != null) {
        return (WxWebUser) requestAttributes.getAttribute(WX_SESSION_USER, RequestAttributes.SCOPE_SESSION);
    }
    return null;
}
 

private void assertAttributeExists() {
	RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
	assertNotNull("request attributes should exist", requestAttributes);
	Object setUpOutsideOfStel = requestAttributes.getAttribute(SET_UP_OUTSIDE_OF_STEL,
		RequestAttributes.SCOPE_REQUEST);
	assertNotNull(SET_UP_OUTSIDE_OF_STEL + " should exist as a request attribute", setUpOutsideOfStel);
}
 

private void assertAttributeDoesNotExist() {
	RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
	assertNotNull("request attributes should exist", requestAttributes);
	Object setUpOutsideOfStel = requestAttributes.getAttribute(SET_UP_OUTSIDE_OF_STEL,
		RequestAttributes.SCOPE_REQUEST);
	assertNull(SET_UP_OUTSIDE_OF_STEL + " should NOT exist as a request attribute", setUpOutsideOfStel);
}
 

@Override
public String resolveCurrentTenantIdentifier() {
	RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
	if (requestAttributes != null) {
		String identifier = (String) requestAttributes.getAttribute("CURRENT_TENANT_IDENTIFIER",RequestAttributes.SCOPE_REQUEST);
		if (identifier != null) {
			return identifier;
		}
	}
	return DEFAULT_TENANT_ID;
}
 

/**
 * Retrieves the current request correlation id if present.
 *
 * @return the correlation id or {@code null}
 */
@SuppressWarnings("unchecked")
public static String getCurrentCorrelationId() {

    final RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
    if (requestAttributes != null) {
        Object correlationId = requestAttributes
                .getAttribute(RequestCorrelationConsts.ATTRIBUTE_NAME, RequestAttributes.SCOPE_REQUEST);

        if (correlationId instanceof RequestCorrelation) {
            return ((RequestCorrelation) correlationId).getRequestId();
        }
    }
    return null;
}
 

public static AuthEnv getCurrent() {
	RequestAttributes req = RequestContextHolder.getRequestAttributes();
	if (req!=null) {
		return (AuthEnv) req.getAttribute(AUTH_ENV_KEY, RequestAttributes.SCOPE_REQUEST);
	} else {
		return CURRENT_ENVS.get();
	}
}
 

private void assertSetUpOutsideOfStelAttributeExists() {
	RequestAttributes requestAttributes = assertRequestAttributesExist();
	Object setUpOutsideOfStel = requestAttributes.getAttribute(SET_UP_OUTSIDE_OF_STEL,
		RequestAttributes.SCOPE_REQUEST);
	assertNotNull(SET_UP_OUTSIDE_OF_STEL + " should exist as a request attribute", setUpOutsideOfStel);
}
 

private void assertSetUpOutsideOfStelAttributeDoesNotExist() {
	RequestAttributes requestAttributes = assertRequestAttributesExist();
	Object setUpOutsideOfStel = requestAttributes.getAttribute(SET_UP_OUTSIDE_OF_STEL,
		RequestAttributes.SCOPE_REQUEST);
	assertNull(SET_UP_OUTSIDE_OF_STEL + " should NOT exist as a request attribute", setUpOutsideOfStel);
}
 

@SuppressWarnings("unchecked")
private <T> T getAttribute(RequestAttributes requestAttributes, String name) {
    return (T) requestAttributes.getAttribute(name, RequestAttributes.SCOPE_REQUEST);
}
 

private void assertSetUpOutsideOfStelAttributeExists() {
	RequestAttributes requestAttributes = assertRequestAttributesExist();
	Object setUpOutsideOfStel = requestAttributes.getAttribute(SET_UP_OUTSIDE_OF_STEL,
		RequestAttributes.SCOPE_REQUEST);
	assertNotNull(SET_UP_OUTSIDE_OF_STEL + " should exist as a request attribute", setUpOutsideOfStel);
}
 

private void assertSetUpOutsideOfStelAttributeDoesNotExist() {
	RequestAttributes requestAttributes = assertRequestAttributesExist();
	Object setUpOutsideOfStel = requestAttributes.getAttribute(SET_UP_OUTSIDE_OF_STEL,
		RequestAttributes.SCOPE_REQUEST);
	assertNull(SET_UP_OUTSIDE_OF_STEL + " should NOT exist as a request attribute", setUpOutsideOfStel);
}
 

@SuppressWarnings("unchecked")
private static <T> T getAttribute(final RequestAttributes requestAttributes, final String name)
{
	return (T)requestAttributes.getAttribute(name, RequestAttributes.SCOPE_REQUEST);
}
 

/**
 * 現在のリクエスト・スコープで有効な{@link MessageContext}インスタンスを返却します。
 * @return 現在のリクエスト・スコープで有効な{@link MessageContext}インスタンス
 */
public static MessageContext getMessageContext() {
    RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
    return (MessageContext) requestAttributes.getAttribute(MessageContext.MESSAGE_CONTEXT_ATTRIBUTE_KEY, RequestAttributes.SCOPE_REQUEST);
}
 

/**
 * 現在のリクエスト・スコープで有効な{@link BindingResult}インスタンスを返却します。
 * @return 現在のリクエスト・スコープで有効な{@link BindingResult}インスタンス
 */
public static BindingResult getCurrentBindingResult() {
    RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
    return (BindingResult) requestAttributes.getAttribute(BINDING_RESULT_KEY, RequestAttributes.SCOPE_REQUEST);
}
 

/**
 * Get the location of the user associated with the current request, if resolvable.
 */
public static Location getCurrentLocation() {
	RequestAttributes attributes = RequestContextHolder.getRequestAttributes();
	return attributes != null ? (Location) attributes.getAttribute(UserLocationHandlerInterceptor.USER_LOCATION_ATTRIBUTE, RequestAttributes.SCOPE_REQUEST) : null;
}
 

/**
 * 現在のリクエスト・スコープで有効な{@link PostBackManager}インスタンスを返却します。
 * @return 現在のリクエスト・スコープで有効な{@link PostBackManager}インスタンス
 */
public static PostBackManager getCurrentPostBackManager() {
    RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
    return (PostBackManager) requestAttributes.getAttribute(STORE_KEY_TO_REQUEST, RequestAttributes.SCOPE_REQUEST);
}
 

/**
 * <p>
 * ポストバック処理をトリガーする例外でるかどうかを判定します。<br/>
 * </p>
 * @param t コントローラのハンドラ・メソッドがスローした例外
 * @return ポストバック処理をトリガーする例外である場合 {@code true}
 */
public static boolean isPostBackTargetException(Throwable t) {
    RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
    PostBackManager instance = (PostBackManager) requestAttributes.getAttribute(STORE_KEY_TO_REQUEST, RequestAttributes.SCOPE_REQUEST);
    return instance.isTargetException(t);
}
 

/**
 * 現在のリクエストに対応するコントローラのハンドラーメソッドに設定されている例外発生時のアクション定義（{@link PostBack#Action}注釈）
 * から、指定した例外に対応するアクションが定義を検索し返却します。
 * @param t 例外
 * @return 例外発生時のアクション定義（{@link PostBack#Action}注釈）
 */
public static PostBack.Action getPostBackAction(Throwable t) {
    RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
    PostBackManager instance = (PostBackManager) requestAttributes.getAttribute(STORE_KEY_TO_REQUEST, RequestAttributes.SCOPE_REQUEST);
    return instance.getInternalPostBackAction(t);
}