CtorMonitor


1   package jfun.yan.monitoring;
2   
3   import java.lang.reflect.Constructor  ;
4   
5   /**
6    * <p>
7    * This interface represents something that monitors the invocation of a constructor.
8    * </p>
9    * @author Michelle Lei
10   *
11   */
12  public interface CtorMonitor {
13    /**
14     * This method is called right before the constructor is invoked.
15     * @param ctor the constructor to be called.
16     * @param args the arguments passed to the constructor.
17     */
18    void constructing(Constructor   ctor, Object  [] args);
19    /**
20     * This method is called right after the constructor is invoked successfully.
21     * @param ctor the constructor. 
22     * @param args the arguments passed to the constructor.
23     * @param instance the object created by the constructor.
24     * @param duration excactly how long the constructor execution takes. (in milliseconds)
25     */
26    void constructed(Constructor   ctor, Object  [] args, Object   instance, long duration);
27    /**
28     * This method is called after the constructor failed.
29     * @param ctor the constructor.
30     * @param args the arguments passed to the constructor.
31     * @param e the exception thrown out of the constructor.
32     * @param duration exactly how long the constructor execution takes. (in milliseconds)
33     */
34    void constructionFailed(Constructor   ctor, Object  [] args, Throwable   e, long duration);
35  }
36

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