package com.nanometer.smartlab.exception;
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import com.nanometer.smartlab.util.FacesUtils;
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import org.apache.log4j.Logger;
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import org.apache.shiro.SecurityUtils;
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import org.apache.shiro.session.ExpiredSessionException;
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import javax.faces.FacesException;
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import javax.faces.application.NavigationHandler;
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import javax.faces.application.ViewExpiredException;
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import javax.faces.context.ExceptionHandler;
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import javax.faces.context.ExceptionHandlerWrapper;
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import javax.faces.context.FacesContext;
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import javax.faces.event.ExceptionQueuedEvent;
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import javax.faces.event.ExceptionQueuedEventContext;
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import java.util.Iterator;
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/**
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* when view expired, invole js function "whenExpired()", popup a dialog to notice user
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*
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* Created by johnny on 14-3-15.
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*/
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public class MyExceptionHandler extends ExceptionHandlerWrapper {
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private static Logger logger = Logger.getLogger(MyExceptionHandler.class);
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private ExceptionHandler wrapped;
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public MyExceptionHandler(ExceptionHandler wrapped) {
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this.wrapped = wrapped;
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}
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@Override
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public ExceptionHandler getWrapped() {
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return this.wrapped;
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}
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@Override
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public void handle() throws FacesException {
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Iterable<ExceptionQueuedEvent> events = this.wrapped.getUnhandledExceptionQueuedEvents();
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for (Iterator<ExceptionQueuedEvent> it = events.iterator(); it.hasNext(); ) {
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ExceptionQueuedEvent event = it.next();
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ExceptionQueuedEventContext eqec = event.getContext();
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Throwable throwable = eqec.getException();
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try {
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if (throwable != null)
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if (throwable instanceof ViewExpiredException
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|| throwable instanceof ExpiredSessionException) {
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FacesContext context = eqec.getContext();
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NavigationHandler navHandler = context.getApplication().getNavigationHandler();
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SecurityUtils.getSubject().logout();
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FacesUtils.js("whenExpired()");
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} else {
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FacesUtils.error("系统错误");
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logger.error("Error: ", throwable);
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}
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} finally {
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it.remove();
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}
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}
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this.wrapped.handle();
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}
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}
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