renderResponse和responseComplete

源码讲解renderResponse和responseComplete的区别
关键字: renderResponse responseComplete
看源代码：
responseComplete：
/**  
    * <p>Signal the JavaServer Faces implementation that the HTTP response  
    * for this request has already been generated (such as an HTTP redirect),  
    * and that the request processing lifecycle should be terminated as soon  
    * as the current phase is completed.</p>  
    *  
    * @throws IllegalStateException if this method is called after  
    *  this instance has been released  
    */  
   public abstract void responseComplete();  

renderResponse：
/**  
  * <p>Signal the JavaServer faces implementation that, as soon as the  
  * current phase of the request processing lifecycle has been completed,  
  * control should be passed to the <em>Render Response</em> phase,  
  * bypassing any phases that have not been executed yet.</p>  
  *  
  * @throws IllegalStateException if this method is called after  
  *  this instance has been released  
  */  
public abstract void renderResponse();  

responseComplete和renderResponse的关系有点象break和continue的关系，responseComplete指示当前的response已经产生，JSF应该在当前阶段执行完成后立刻整个生命周期，break的概念。renderResponse则是指示当前阶段执行结束后直接跳到Render Response阶段，继续生命周期，因此是continue的概念。

下面是LifeCycle的execute和render方法，更加证实了这些：

com.sun.faces.lifecycle.LifecycleImpl
// Execute the phases up to but not including Render Response   
public void execute(FacesContext context) throws FacesException {   
  
    if (context == null) {   
        throw new NullPointerException   
            (MessageUtils.getExceptionMessageString   
             (MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "context"));   
    }   
  
    if (LOGGER.isLoggable(Level.FINE)) {   
        LOGGER.fine("execute(" + context + ")");   
    }   
  
    for (int i = 1, len = phases.length -1 ; i < len; i++) { // Skip ANY_PHASE placeholder   
  
        if (context.getRenderResponse() ||   
            context.getResponseComplete()) {   
            break;   
        }   
  
        phases[i].doPhase(context, this, listeners.listIterator());   
  
    }   
  
}   
  
  
// Execute the Render Response phase   
public void render(FacesContext context) throws FacesException {   
  
    if (context == null) {   
        throw new NullPointerException   
            (MessageUtils.getExceptionMessageString   
             (MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "context"));   
    }   
  
    if (LOGGER.isLoggable(Level.FINE)) {   
        LOGGER.fine("render(" + context + ")");   
    }   
  
    if (!context.getResponseComplete()) {   
        response.doPhase(context, this, listeners.listIterator());   
    }   
  
}  
一般加ResponseComplete之后,当前页面会变成空白,这对于后台关闭页面可用