org.apache.aries.blueprint
Interface Interceptor

public interface Interceptor

An Interceptor interface provides support for custom interceptor implementation.

Method Summary

int	getRank() Return the rank of the interceptor, which is used to determine the order of the interceptors to be invoked Rank is between Integer.MIN_VALUE and Integer.MAX_VALUE, interceptors are called in the order of highest value rank first to lowest value rank last i.e.
void	postCallWithException(ComponentMetadata cm, Method m, Throwable ex, Object preCallToken) The method is called after the method m is invoked and causes an exception.
void	postCallWithReturn(ComponentMetadata cm, Method m, Object returnType, Object preCallToken) This method is called after the method m is invoked and returned normally.
Object	preCall(ComponentMetadata cm, Method m, Object... parameters) This is called just before the method m is invocation.

Method Detail

preCall

Object preCall(ComponentMetadata cm,
               Method m,
               Object... parameters)
               throws Throwable

This is called just before the method m is invocation.

Parameters:

cm - : the component's metada

m: - the method to be invoked

parameters: - method parameters

Returns:

token which will subsequently be passed to postCall

Throws:

Throwable

postCallWithReturn

void postCallWithReturn(ComponentMetadata cm,
                        Method m,
                        Object returnType,
                        Object preCallToken)
                        throws Throwable

This method is called after the method m is invoked and returned normally.

Parameters:

cm: - the component metadata

m: - the method invoked

returnType - : the return object

preCallToken - token returned by preCall

Throws:

Throwable

postCallWithException

void postCallWithException(ComponentMetadata cm,
                           Method m,
                           Throwable ex,
                           Object preCallToken)
                           throws Throwable

The method is called after the method m is invoked and causes an exception.

Parameters:

cm - : the component metadata

m - : the method invoked

ex - : the Throwable thrown

preCallToken - token returned by preCall

Throws:

Throwable

getRank

int getRank()

Return the rank of the interceptor, which is used to determine the order of the interceptors to be invoked Rank is between Integer.MIN_VALUE and Integer.MAX_VALUE, interceptors are called in the order of highest value rank first to lowest value rank last i.e. an interceptor with rank Integer.MAX_VALUE will be called before all others (except of the same rank).

Returns:

the rank of the interceptor