Spring Integration 出站网关响应验证

Question

我有一个从 MVC 层获取输入的网关。输入被发送到出站网关（REST 调用）。然后通过过滤器发送响应以验证响应。如何将丢弃通道（丢弃的消息）发送回网关。 我需要将无效响应发送回网关或向网关抛出异常。

Answer 1

您可能无需担心discardChannel。您的网关案例有这个属性：

/**
 * Specify whether this filter should throw a
 * {@link MessageRejectedException} when its selector does not accept a
 * Message. The default value is <code>false</code> meaning that rejected
 * Messages will be quietly dropped or sent to the discard channel if
 * available. Typically this value would not be <code>true</code> when
 * a discard channel is provided, but if so, it will still apply
 * (in such a case, the Message will be sent to the discard channel,
 * and <em>then</em> the exception will be thrown).
 * @param throwExceptionOnRejection true if an exception should be thrown.
 * @see #setDiscardChannel(MessageChannel)
 */
public void setThrowExceptionOnRejection(boolean throwExceptionOnRejection) {