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This is the master POM file for Sun's Implementation of the JSF 2.1 Specification.

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package javax.faces.webapp;

import java.util.logging.Logger;
import java.util.logging.Level;
import java.util.LinkedList;
import java.util.Collections;
import java.util.Iterator;

import javax.faces.context.ExceptionHandlerFactory;
import javax.faces.context.ExceptionHandler;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.event.ExceptionQueuedEvent;
import javax.faces.event.SystemEvent;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.ExceptionQueuedEventContext;
import javax.faces.event.PhaseId;
import javax.el.ELException;
import javax.faces.application.FacesMessage;
import javax.faces.component.UpdateModelException;
import javax.faces.context.FacesContext;


/**
 * 

This {@link ExceptionHandlerFactory} instance * produces JSF 1.2 compatible * {@link ExceptionHandler} instances. The {@link ExceptionHandler#handle} * method of the ExceptionHandler produced by this factory must * meet the following requirements

*
* *
    * *
  • Any * exceptions thrown before or after phase execution will be logged and * swallowed.

  • * *
  • The implementation must examine * the Exception within each of the unhandled exception * events. If the Exception is an instance of * {@link UpdateModelException}, extract the {@link FacesMessage} from * the UpdateModelException. Log a SEVERE * message to the log and queue the FacesMessage * on the {@link FacesContext}, using the clientId of * the source component in a call to * {@link FacesContext#addMessage(java.lang.String, javax.faces.application.FacesMessage)}

  • * *
* *
* * @since 2.0 */ public class PreJsf2ExceptionHandlerFactory extends ExceptionHandlerFactory { public PreJsf2ExceptionHandlerFactory() { } // ------------------------------------ Methods from ExceptionHandlerFactory /** * @return a new {@link ExceptionHandler} that behaves in a fashion compatible * with specifications prior to JavaServerFaces 1.2 */ public ExceptionHandler getExceptionHandler() { return new PreJsf2ExceptionHandler(); } // ---------------------------------------------------------- Nested Classes /** * JSF 1.2-style ExceptionHandler implementation. */ private static final class PreJsf2ExceptionHandler extends ExceptionHandler { private static final Logger LOGGER = Logger.getLogger("javax.faces.webapp", "javax.faces.LogStrings"); private static final String LOG_BEFORE_KEY = "servere.webapp.prejsf2.exception.handler.log_before"; private static final String LOG_AFTER_KEY = "servere.webapp.prejsf2.exception.handler.log_after"; private static final String LOG_KEY = "servere.webapp.prejsf2.exception.handler.log"; private LinkedList unhandledExceptions; private LinkedList handledExceptions; private ExceptionQueuedEvent handled; // ------------------------------------------- Methods from ExceptionHandler /** * @see ExceptionHandler@getHandledExceptionQueuedEvent() */ public ExceptionQueuedEvent getHandledExceptionQueuedEvent() { return handled; } /** * * * @since 2.0 */ public void handle() throws FacesException { for (Iterator i = getUnhandledExceptionQueuedEvents().iterator(); i.hasNext();) { ExceptionQueuedEvent event = i.next(); ExceptionQueuedEventContext context = (ExceptionQueuedEventContext) event.getSource(); try { Throwable t = context.getException(); if (isRethrown(t, (context.inBeforePhase() || context.inAfterPhase()))) { handled = event; Throwable unwrapped = getRootCause(t); if (unwrapped != null) { throw new FacesException(unwrapped.getMessage(), unwrapped); } else { if (t instanceof FacesException) { throw (FacesException) t; } else { throw new FacesException(t.getMessage(), t); } } } else { log(context); } } finally { if (handledExceptions == null) { handledExceptions = new LinkedList(); } handledExceptions.add(event); i.remove(); } } } /** * @see javax.faces.context.ExceptionHandler#isListenerForSource(Object) */ public boolean isListenerForSource(Object source) { return (source instanceof ExceptionQueuedEventContext); } /** * @see javax.faces.context.ExceptionHandler#processEvent(javax.faces.event.SystemEvent) */ public void processEvent(SystemEvent event) throws AbortProcessingException { if (event != null) { if (unhandledExceptions == null) { unhandledExceptions = new LinkedList(); } unhandledExceptions.add((ExceptionQueuedEvent) event); } } /** * @see ExceptionHandler#getRootCause(Throwable) */ public Throwable getRootCause(Throwable t) { if (t == null) { return null; } if (shouldUnwrap(t.getClass())) { Throwable root = t.getCause(); if (root != null) { Throwable tmp = getRootCause(root); if (tmp == null) { return root; } else { return tmp; } } else { return t; } } return t; } /** * @see javax.faces.context.ExceptionHandler#getUnhandledExceptionQueuedEvents() */ public Iterable getUnhandledExceptionQueuedEvents() { return ((unhandledExceptions != null) ? unhandledExceptions : Collections.emptyList()); } /** * @return * * @see javax.faces.context.ExceptionHandler#getHandledExceptionQueuedEvents() */ public Iterable getHandledExceptionQueuedEvents() { return ((handledExceptions != null) ? handledExceptions : Collections.emptyList()); } // --------------------------------------------------------- Private Methods /** * @param c Throwable implementation class * * @return true if c is FacesException.class or * ELException.class */ private boolean shouldUnwrap(Class c) { return (FacesException.class.equals(c) || ELException.class.equals(c)); } private boolean isRethrown(Throwable t, boolean isBeforeOrAfterPhase) { return (!isBeforeOrAfterPhase && !(t instanceof AbortProcessingException) && !(t instanceof UpdateModelException)); } private void log(ExceptionQueuedEventContext exceptionContext) { Throwable t = exceptionContext.getException(); UIComponent c = exceptionContext.getComponent(); if (t instanceof UpdateModelException) { FacesContext context = FacesContext.getCurrentInstance(); FacesMessage message = ((UpdateModelException)t).getFacesMessage(); LOGGER.log(Level.SEVERE, message.getSummary(), t.getCause()); context.addMessage(c.getClientId(context), message); } else { boolean beforePhase = exceptionContext.inBeforePhase(); boolean afterPhase = exceptionContext.inAfterPhase(); PhaseId phaseId = exceptionContext.getPhaseId(); String key = getLoggingKey(beforePhase, afterPhase); if (LOGGER.isLoggable(Level.SEVERE)) { LOGGER.log(Level.SEVERE, key, new Object[]{t.getClass().getName(), phaseId.toString(), ((c != null) ? c.getClientId(exceptionContext.getContext()) : ""), t.getMessage()}); LOGGER.log(Level.SEVERE, t.getMessage(), t); } } } private String getLoggingKey(boolean beforePhase, boolean afterPhase) { if (beforePhase) { return LOG_BEFORE_KEY; } else if (afterPhase) { return LOG_AFTER_KEY; } else { return LOG_KEY; } } } // END PreJsf2ExceptionHandler }




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