javax.interceptor

Interface InvocationContext

public interface InvocationContext

Exposes context information about the intercepted invocation and operations that enable interceptor methods to control the behavior of the invocation chain.

    @AroundInvoke
    public Object logInvocation(InvocationContext ctx) throws Exception {
       String class = ctx.getMethod().getDeclaringClass().getName();
       String method = ctx.getMethod().getName();
       Logger.global.entering(class, method, ctx.getParameters());
       try {
          Object result = ctx.proceed();
          Logger.global.exiting(class, method, result);
          return result;
       }
       catch (Exception e) {
          Logger.global.throwing(class, method, e);
          throw e;
       }

    }
 
 

Since:

Interceptors 1.0

Method Summary

Methods

Modifier and Type	Method and Description
Map<String,Object>	getContextData() Returns the context data associated with this invocation or lifecycle callback.
Method	getMethod() Returns the method of the target class for which the interceptor was invoked.
Object[]	getParameters() Returns the parameter values that will be passed to the method of the target class.
Object	getTarget() Returns the target instance.
Object	getTimer() Returns the timer object associated with a timeout method invocation on the target class, or a null value for method and lifecycle callback interceptor methods.
Object	proceed() Proceed to the next interceptor in the interceptor chain.
void	setParameters(Object[] params) Sets the parameter values that will be passed to the method of the target class.

Method Detail

getTarget

Object getTarget()

Returns the target instance.

Returns:

the target instance

getTimer

Object getTimer()

Returns the timer object associated with a timeout method invocation on the target class, or a null value for method and lifecycle callback interceptor methods. For example, when associated with an EJB component timeout, this method returns Timer

Returns:

the timer object or a null value

Since:

Interceptors 1.1

getMethod

Method getMethod()

Returns the method of the target class for which the interceptor was invoked. For method interceptors, the method of the target class is returned. For lifecycle callback interceptors, a null value is returned.

Returns:

the method, or a null value

getParameters

Object[] getParameters()

Returns the parameter values that will be passed to the method of the target class. If setParameters() has been called, getParameters() returns the values to which the parameters have been set.

Returns:

the parameter values, as an array

Throws:

IllegalStateException - if invoked within a lifecycle callback method.

setParameters

void setParameters(Object[] params)

Sets the parameter values that will be passed to the method of the target class.

Parameters:

params - the parameter values, as an array

Throws:

IllegalStateException - if invoked within a lifecycle callback method.

IllegalArgumentException - if the types of the given parameter values do not match the types of the method parameters, or if the number of parameters supplied does not equal the number of method parameters.

getContextData

Map<String,Object> getContextData()

Returns the context data associated with this invocation or lifecycle callback. If there is no context data, an empty Map<String,Object> object will be returned.

Returns:

the context data, as a map

proceed

Object proceed()
               throws Exception

Proceed to the next interceptor in the interceptor chain. Return the result of the next method invoked, or a null value if the method has return type void.

Returns:

the return value of the next method in the chain

Throws:

Exception