FacesContextListener 实现

Question

尝试实施 FacesContextListener, which seems to be the ideal place for the current challenge we are facing, I still struggle with its implementation. Attempts to declare it in the faces-config.xml or a construction similar to the ApplicationListener 失败（因为我可能引用了错误的东西（当然 class 本身除外））。

有人可以提供有关 FacesContextListener 实施的指导/简短示例吗？

Answer 1

创建一个实现 FacesContextListener 接口的 Java class。

package ch.hasselba.xpages;

import javax.faces.context.FacesContext;
import com.ibm.xsp.event.FacesContextListener;

public class MyFacesContextListener implements FacesContextListener {

    public void beforeContextReleased(FacesContext fc) {
        System.out.println("beforeContextReleased");
    }

    public void beforeRenderingPhase(FacesContext fc) {
        System.out.println("beforeRenderingPhase"); 
    }

}

现在，将 class 的实例添加到您的 XPage：

importPackage( ch.hasselba.xpages )
var fcl = new ch.hasselba.xpages.MyFacesContextListener();
facesContext.addRequestListener( fcl );

希望对您有所帮助！

编辑： 这是一个带有匿名监听器的 Java 实现：

package ch.hasselba.xpages;

import javax.faces.context.FacesContext;
import com.ibm.xsp.context.FacesContextExImpl;
import com.ibm.xsp.event.FacesContextListener;

public class MyObject {

    private transient FacesContextListener mFCListener;

    public MyObject() {
            mFCListener = new FacesContextListener() {

            public void beforeContextReleased(FacesContext fc) {
                System.out.println("Before Releasing.");
            }

            public void beforeRenderingPhase(FacesContext fc) {
                System.out.println("Before Rendering.");
            }
     };

     FacesContextExImpl fc = (FacesContextExImpl) FacesContext.getCurrentInstance();
     fc.addRequestListener( this.mFCListener );
 }
}

FacesContextListener 实现

FacesContextListener implementation

faces-config

xpages