Apache CXF - 在In和Out拦截器之间共享数据 [英] Apache CXF - share data between In and Out interceptors

问题描述

我正在使用Apach CXF作为REST提供程序。

I am using Apach CXF as REST provider.

我想在进入webservice时收集数据，在输入resposne之前收集数据并添加一些计算响应。对于这个问题而言，为了简单起见，我们假设我想获得进入时的开始时间，发送响应之前的结束时间，并将总时间添加到响应中。

I want to gather data when I enter the webservice, gather data before I enter the resposne and add some calculation to the response. For this question and for simplicity, lets assume I want to get the starting time on entering, the finishing time before the response is sent and add the total time to the response.

现在，我该怎么做？我创建了In和Out拦截器单独工作，但我如何使用Out拦截器中In拦截器的数据？

Now, how do I do that? I created In and Out interceptors that works fine alone, but how do I use the data from the In interceptor in the Out interceptor?

谢谢
Idob

Thanks Idob

我尝试将数据设置为上下文参数

I tried to set the data as contextual parameter with

message.setContextualProperty(key,value);

但我在

message.getContextualProperty(key);

我也尝试了相同但只是

message.put(key,value) and message.get(key)

不起作用。

想法是谁？

谢谢你，
Idob

Thank you, Idob

推荐答案

您可以在 交换 。 CXF为每个请求创建一个 Exchange 对象，作为请求/响应对的输入和输出消息的容器，并使其可以作为消息访问来自两者的.getExchange（）。

You can store values on the Exchange. CXF creates an Exchange object for each request to act as a container for the in and out messages for the request/response pair and makes it accessible as message.getExchange() from both.

在拦截器中：

public void handleMessage(Message inMessage) throws Fault {
  inMessage.getExchange().put("com.example.myKey", myCustomObject);
}

Out interceptor

Out interceptor

public void handleMessage(Message outMessage) throws Fault {
  MyCustomObject obj = (MyCustomObject)outMessage.getExchange().get("com.example.myKey");
}

（反之亦然，客户端拦截器，其中存储将存储值和in将检索它们）。选择一个你知道其他拦截器不会使用的密钥 - 一个包合格的名称是一个不错的选择。请注意，如消息， Exchange 是 StringMap 和有一个通用的put / get方法，它带有一个 Class 作为为你提供编译时类型安全的密钥，并且保存你不得不进行强制转换：

(or vice-versa for client-side interceptors, where the out would store values and the in would retrieve them). Choose a key that you know won't be used by other interceptors - a package-qualified name is a good choice. Note that, like Message, Exchange is a StringMap and has generic put/get methods taking a Class as the key that give you compile-time type safety and save you having to cast:

theExchange.put(MyCustomObject.class, new MyCustomObject());
MyCustomObject myObj = theExchange.get(MyCustomObject.class);

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