[seam-commits] Seam SVN: r13120 - in modules/faces/branches/exception_handling: impl/src/main/java/org/jboss/seam/exceptionhandling and 1 other directory.

Author: lightguard Date: 2010-06-10 16:06:46 -0400 (Thu, 10 Jun 2010) New Revision: 13120 Added: modules/faces/branches/exception_handling/api/src/main/java/org/jboss/seam/exceptionhandling/ExceptionEvent.java modules/faces/branches/exception_handling/impl/src/main/java/org/jboss/seam/exceptionhandling/ExceptionHandlerExecutor.java Modified: modules/faces/branches/exception_handling/api/src/main/java/org/jboss/seam/exceptionhandling/ExceptionHandler.java modules/faces/branches/exception_handling/impl/src/main/java/org/jboss/seam/exceptionhandling/SeamExceptionHandler.java Log: Changing the design based on IRC conversations. Things compile :) I don't know how to test this though, I'll need some help from Dan or Lincoln in getting it setup Added: modules/faces/branches/exception_handling/api/src/main/java/org/jboss/seam/exceptionhandling/ExceptionEvent.java =================================================================== --- modules/faces/branches/exception_handling/api/src/main/java/org/jboss/seam/exceptionhandling/ExceptionEvent.java (rev 0) +++ modules/faces/branches/exception_handling/api/src/main/java/org/jboss/seam/exceptionhandling/ExceptionEvent.java 2010-06-10 20:06:46 UTC (rev 13120) @@ -0,0 +1,73 @@ +/* + * JBoss, Home of Professional Open Source + * Copyright 2010, Red Hat, Inc., and individual contributors + * by the @authors tag. See the copyright.txt in the distribution for a + * full listing of individual contributors. + * + * This is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * This software is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this software; if not, write to the Free + * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA, or see the FSF site: http://www.fsf.org. + */ + +package org.jboss.seam.exceptionhandling; + +/** + * Payload for an exception to be handled. + */ +public class ExceptionEvent +{ + private State state; + private Throwable exception; + private boolean exceptionHandled; + + public ExceptionEvent(Throwable exception, State state) + { + this.exception = exception; + this.state = state; + this.exceptionHandled = false; + } + + /** + * @return the exception to be handled. + */ + public Throwable getException() + { + return exception; + } + + /** + * @return State instance related to the environment. This will often need to be cast to the correct sub class. + */ + public State getState() + { + return state; + } + + /** + * @return flag indicating the exception has been handled. + */ + public boolean isExceptionHandled() + { + return exceptionHandled; + } + + /** + * This should be set if the exception has been handled in an event observer or handler. + * @param exceptionHandled new value + */ + public void setExceptionHandled(boolean exceptionHandled) + { + this.exceptionHandled = exceptionHandled; + } +} Property changes on: modules/faces/branches/exception_handling/api/src/main/java/org/jboss/seam/exceptionhandling/ExceptionEvent.java ___________________________________________________________________ Name: svn:mime-type + text/x-java-source Name: svn:keywords + Author Date Id Revision URL Name: svn:eol-style + native Modified: modules/faces/branches/exception_handling/api/src/main/java/org/jboss/seam/exceptionhandling/ExceptionHandler.java =================================================================== --- modules/faces/branches/exception_handling/api/src/main/java/org/jboss/seam/exceptionhandling/ExceptionHandler.java 2010-06-10 18:12:42 UTC (rev 13119) +++ modules/faces/branches/exception_handling/api/src/main/java/org/jboss/seam/exceptionhandling/ExceptionHandler.java 2010-06-10 20:06:46 UTC (rev 13120) @@ -25,7 +25,7 @@ * Registers an exception handler for a specific exception and state, this * is the main entry point for using Seam's exception handling infrastructure. */ -public interface ExceptionHandler<E extends Class<Throwable>, S extends State> +public interface ExceptionHandler<E extends Throwable, S extends State> { /** * @return the numeric priority of this handler in relationship to Added: modules/faces/branches/exception_handling/impl/src/main/java/org/jboss/seam/exceptionhandling/ExceptionHandlerExecutor.java =================================================================== --- modules/faces/branches/exception_handling/impl/src/main/java/org/jboss/seam/exceptionhandling/ExceptionHandlerExecutor.java (rev 0) +++ modules/faces/branches/exception_handling/impl/src/main/java/org/jboss/seam/exceptionhandling/ExceptionHandlerExecutor.java 2010-06-10 20:06:46 UTC (rev 13120) @@ -0,0 +1,86 @@ +/* + * JBoss, Home of Professional Open Source + * Copyright 2010, Red Hat, Inc., and individual contributors + * by the @authors tag. See the copyright.txt in the distribution for a + * full listing of individual contributors. + * + * This is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * This software is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this software; if not, write to the Free + * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA, or see the FSF site: http://www.fsf.org. + */ +package org.jboss.seam.exceptionhandling; + +import org.jboss.seam.faces.util.BeanManagerUtils; + +import javax.enterprise.event.Observes; +import javax.enterprise.inject.spi.BeanManager; +import java.util.Collections; +import java.util.Comparator; +import java.util.Iterator; +import java.util.List; + +/** + * Finds and invokes all {@link ExceptionHandler} instants for a particular + * exception and {@link State}. + * <p> + * If any handlers are found and invoked the the {@link ExceptionEvent#setExceptionHandled(boolean)} is set to true. + * </p> + */ +public class ExceptionHandlerExecutor +{ + /** + * Observes the event, finds the correct exception handler(s) and invokes them. + * @param event Event Payload + */ + @SuppressWarnings("unchecked") + public void executeHandlers(@Observes ExceptionEvent event) + { + final HandlerChain chain = new HandlerChainImpl(); + final Throwable exception = event.getException(); + final State state = event.getState(); + final BeanManager beanManager = state.getBeanManager(); + final BeanManagerUtils managerUtils = BeanManagerUtils.getContextualInstance(beanManager, BeanManagerUtils.class); + ExceptionHandler bean; + final List<ExceptionHandler> beans = managerUtils.getContextualInstances(ExceptionHandler.class); + + // Finding the correct exception handlers using reflection based on the method + // to determine if it's the correct + for (Iterator<ExceptionHandler> iter = beans.iterator(); iter.hasNext();) + { + bean = iter.next(); + try + { + bean.getClass().getMethod("handle", HandlerChain.class, FacesState.class, exception.getClass()); + } + catch (NoSuchMethodException e) + { + iter.remove(); + } + } + + Collections.sort(beans, new Comparator<ExceptionHandler>() + { + public int compare(ExceptionHandler lhs, ExceptionHandler rhs) + { + return lhs.getPriority() - rhs.getPriority(); + } + }); + + for (ExceptionHandler handler : beans) + { + handler.handle(chain, state, exception); + event.setExceptionHandled(true); + } + } +} Property changes on: modules/faces/branches/exception_handling/impl/src/main/java/org/jboss/seam/exceptionhandling/ExceptionHandlerExecutor.java ___________________________________________________________________ Name: svn:mime-type + text/x-java-source Name: svn:keywords + Author Date Id Revision URL Name: svn:eol-style + native Modified: modules/faces/branches/exception_handling/impl/src/main/java/org/jboss/seam/exceptionhandling/SeamExceptionHandler.java =================================================================== --- modules/faces/branches/exception_handling/impl/src/main/java/org/jboss/seam/exceptionhandling/SeamExceptionHandler.java 2010-06-10 18:12:42 UTC (rev 13119) +++ modules/faces/branches/exception_handling/impl/src/main/java/org/jboss/seam/exceptionhandling/SeamExceptionHandler.java 2010-06-10 20:06:46 UTC (rev 13120) @@ -23,8 +23,11 @@ package org.jboss.seam.exceptionhandling; import org.jboss.seam.faces.util.BeanManagerUtils; +import org.jboss.weld.extensions.beanManager.BeanManagerAccessor; import javax.enterprise.context.ApplicationScoped; +import javax.enterprise.context.spi.CreationalContext; +import javax.enterprise.event.Event; import javax.enterprise.inject.spi.Bean; import javax.enterprise.inject.spi.BeanManager; import javax.enterprise.util.TypeLiteral; @@ -49,9 +52,10 @@ private ExceptionHandler wrapped; + public SeamExceptionHandler() throws NamingException { - this.beanManager = (BeanManager) new InitialContext().lookup("java:comp/BeanManager"); + this.beanManager = BeanManagerAccessor.getManager(); this.managerUtils = new BeanManagerUtils(); } @@ -68,7 +72,8 @@ ExceptionQueuedEvent event; Throwable exception; HandlerChain chain; - FacesState state = this.managerUtils.getContextualInstance(this.beanManager, FacesStateImpl.class); + FacesState state = BeanManagerUtils.getContextualInstance(this.beanManager, FacesStateImpl.class); + Bean<?> bean; for (Iterator<ExceptionQueuedEvent> i = this.getUnhandledExceptionQueuedEvents().iterator(); i.hasNext();) { @@ -77,26 +82,14 @@ final Throwable realException = (this.getRootCause(exception) != null) ? this.getRootCause(exception) : exception; - chain = new HandlerChainImpl(); - beans = this.beanManager.getBeans(new ParameterizedType() { - public Type[] getActualTypeArguments() - { - return new Type[] {realException.getClass(), FacesState.class}; - } + ExceptionEvent exceptionEventObject = new ExceptionEvent(realException, this.managerUtils.getContextualInstance(FacesState.class)); - public Type getRawType() - { - return org.jboss.seam.exceptionhandling.ExceptionHandler.class; - } + this.beanManager.fireEvent(exceptionEventObject); - public Type getOwnerType() - { - return null; - } - }); - // TODO: Find handlers for the exception type - // TODO: execute handler - + if (exceptionEventObject.isExceptionHandled()) + { + i.remove(); + } } if (this.wrapped != null)