Spring.Net Before Advice not working
I am trying to implement a very basic before advice with Spring.Net, that just prints some information to the console. Here is the 开发者_如何学JAVArelevant part of the spring config:
<!-- Before Advice: Method Logging -->
<object id="methodLoggingBeforeAdvice"
type="Ch.Test.AddressBook.Common.Advice.MethodLoggingBeforeAdvice" />
<!-- Program Proxy w/ Advice Applied -->
<object id="programProxy"
type="Spring.Aop.Framework.ProxyFactoryObject">
<property name="target" ref="programProxyTarget" />
<property name="interceptorNames">
<list>
<value>methodLoggingBeforeAdvice</value>
</list>
</property>
</object>
<!-- Target, which the advice is applied to -->
<object id="programProxyTarget"
type="Ch.Test.AddressBook.Ui.ConsoleUi.Program">
<constructor-arg ref="repository"/>
</object>
Here is the advice:
public class MethodLoggingBeforeAdvice : IMethodBeforeAdvice
{
public void Before(MethodInfo method, Object[] args, Object target)
{
// Log method start
Console.Out.WriteLine(
"MethodLoggingBeforeAdvice: Entering method '"
+ method.Name + "'");
// Log method arguments
for (int i = 0; i < args.Length; i++)
{
Console.Out.WriteLine("MethodLoggingBeforeAdvice: Argument " + (i + 1)
+ " - " + args[0].ToString());
}
}
}
Everything builds fine, the application is running, the Program class gets instantiated and methods are called, but there is not output from the advice. I can't seem to figure out why... Thanks in advance!
I feel stupid.
The code I posted was alright. The problem was the initializing of the object. This is what I used:
var program = (Program)ContextRegistry.GetContext().GetObject("program");
program.StartUp();
I should actually have fetched the programProxy-Object that uses the advice instead:
var program = (Program)ContextRegistry.GetContext().GetObject("programProxy");
program.StartUp();
You could also use an anonymous inner-object so you can't accidentally get an unadvised object:
<!-- Before Advice: Method Logging -->
<object id="methodLoggingBeforeAdvice"
type="Ch.Test.AddressBook.Common.Advice.MethodLoggingBeforeAdvice" />
<!-- Program Proxy w/ Advice Applied using an anonymous inner object-->
<object id="program"
type="Spring.Aop.Framework.ProxyFactoryObject">
<property name="target">
<object type="Ch.Test.AddressBook.Ui.ConsoleUi.Program">
<constructor-arg ref="repository"/>
</object>
</property>
<property name="interceptorNames">
<list>
<value>methodLoggingBeforeAdvice</value>
</list>
</property>
</object>
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