001 /**
002 * GRANITE DATA SERVICES
003 * Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 * This file is part of the Granite Data Services Platform.
006 *
007 * Granite Data Services is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * Granite Data Services is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 * General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this library; if not, write to the Free Software
019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 * USA, or see <http://www.gnu.org/licenses/>.
021 */
022 package org.granite.messaging.service;
023
024 import java.lang.reflect.Method;
025 import java.util.ArrayList;
026 import java.util.HashMap;
027 import java.util.List;
028 import java.util.Map;
029
030 import javax.servlet.ServletException;
031
032 import org.granite.config.flex.Destination;
033 import org.granite.context.GraniteContext;
034 import org.granite.logging.Logger;
035
036 import flex.messaging.messages.Message;
037
038
039 /**
040 * @author Venkat DANDA
041 * @author Cameron INGRAM
042 *
043 * Update services-config.xml to use the seam service exception handler
044 * <factory id="tideSeamFactory" class="org.granite.tide.seam.SeamServiceFactory" >
045 * <properties>
046 * <service-exception-handler>org.granite.tide.seam.SeamServiceExceptionHandler</service-exception-handler>
047 * </properties>
048 * </factory>
049 */
050 public class ExtendedServiceExceptionHandler extends DefaultServiceExceptionHandler {
051
052 private static final long serialVersionUID = -1L;
053 private static final Logger log = Logger.getLogger(ExtendedServiceExceptionHandler.class);
054
055 public static final Class<?> JAVAX_EJB_EXCEPTION;
056 static {
057 Class<?> exception = null;
058 try {
059 exception = Thread.currentThread().getContextClassLoader().loadClass("javax.ejb.EJBException");
060 }
061 catch (Exception e) {
062 }
063 JAVAX_EJB_EXCEPTION = exception;
064 }
065
066 public ExtendedServiceExceptionHandler() {
067 this(true);
068 }
069
070 public ExtendedServiceExceptionHandler(boolean logException) {
071 super(logException);
072 }
073
074 @Override
075 protected ServiceException getServiceException(Message request, Destination destination, String method, Throwable t) {
076 if (t == null)
077 throw new NullPointerException("Parameter t cannot be null");
078
079 Map<String, Object> extendedData = new HashMap<String, Object>();
080
081 if (t instanceof ServiceException) {
082 ((ServiceException)t).getExtendedData().putAll(extendedData);
083 return (ServiceException)t;
084 }
085
086 List<Throwable> causes = new ArrayList<Throwable>();
087 for (Throwable cause = t; cause != null; cause = getCause(cause))
088 causes.add(cause);
089
090 String detail = "\n" +
091 "- destination: " + (destination != null ? destination.getId() : "") + "\n" +
092 "- method: " + method + "\n" +
093 "- exception: " + t.toString() + "\n";
094
095 for (int i = causes.size()-1; i >= 0; i--) {
096 Throwable cause = causes.get(i);
097 for (ExceptionConverter ec : GraniteContext.getCurrentInstance().getGraniteConfig().getExceptionConverters()) {
098 if (ec.accepts(cause, t))
099 return ec.convert(cause, detail, extendedData);
100 }
101 }
102
103 if (getLogException())
104 log.error(t, "Could not process remoting message: %s", request);
105
106 // Default exception handler
107 ServiceException se = new ServiceException(t.getClass().getSimpleName() + ".Call.Failed", t.getMessage(), detail, t);
108 se.getExtendedData().putAll(extendedData);
109 return se;
110 }
111
112
113 public static Throwable getCause(Throwable t) {
114 Throwable cause = null;
115 try {
116 if (JAVAX_EJB_EXCEPTION != null && JAVAX_EJB_EXCEPTION.isInstance(t)) {
117 Method m = JAVAX_EJB_EXCEPTION.getMethod("getCausedByException");
118 cause = (Throwable)m.invoke(t);
119 }
120 else if (t instanceof ServletException)
121 cause = ((ServletException)t).getRootCause();
122 else
123 cause = t.getCause();
124 }
125 catch (Exception x) {
126 return null;
127 }
128 return cause == t ? null : cause;
129 }
130 }