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package org.mule.impl; |
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import org.mule.MuleManager; |
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import org.mule.config.ExceptionHelper; |
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import org.mule.impl.internal.notifications.ExceptionNotification; |
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import org.mule.impl.message.ExceptionMessage; |
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import org.mule.providers.NullPayload; |
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import org.mule.transaction.TransactionCoordination; |
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import org.mule.umo.MessagingException; |
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import org.mule.umo.TransactionException; |
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import org.mule.umo.UMOEvent; |
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import org.mule.umo.UMOEventContext; |
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import org.mule.umo.UMOException; |
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import org.mule.umo.UMOMessage; |
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import org.mule.umo.UMOTransaction; |
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import org.mule.umo.endpoint.UMOEndpoint; |
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import org.mule.umo.endpoint.UMOEndpointURI; |
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import org.mule.umo.endpoint.UMOImmutableEndpoint; |
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import org.mule.umo.lifecycle.Initialisable; |
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import org.mule.umo.lifecycle.InitialisationException; |
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import org.mule.umo.lifecycle.LifecycleException; |
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import org.mule.umo.routing.RoutingException; |
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import java.beans.ExceptionListener; |
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import java.util.Iterator; |
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import java.util.List; |
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import edu.emory.mathcs.backport.java.util.concurrent.CopyOnWriteArrayList; |
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import edu.emory.mathcs.backport.java.util.concurrent.atomic.AtomicBoolean; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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50 | 2796 | public abstract class AbstractExceptionListener implements ExceptionListener, Initialisable |
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{ |
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55 | 2796 | protected transient Log logger = LogFactory.getLog(getClass()); |
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57 | 2796 | protected List endpoints = new CopyOnWriteArrayList(); |
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59 | 2796 | protected AtomicBoolean initialised = new AtomicBoolean(false); |
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public List getEndpoints() |
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{ |
63 | 0 | return endpoints; |
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} |
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public void setEndpoints(List endpoints) |
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{ |
68 | 0 | for (Iterator iterator = endpoints.iterator(); iterator.hasNext();) |
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{ |
70 | 0 | addEndpoint((UMOEndpoint) iterator.next()); |
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} |
72 | 0 | } |
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public void addEndpoint(UMOEndpoint endpoint) |
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{ |
76 | 0 | if (endpoint != null) |
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{ |
78 | 0 | endpoint.setType(UMOEndpoint.ENDPOINT_TYPE_SENDER); |
79 | 0 | endpoints.add(endpoint); |
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} |
81 | 0 | } |
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public boolean removeEndpoint(UMOEndpoint endpoint) |
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{ |
85 | 0 | return endpoints.remove(endpoint); |
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} |
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public void exceptionThrown(Exception e) |
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{ |
90 | 4 | fireNotification(new ExceptionNotification(e)); |
91 | 4 | logException(e); |
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93 | 10 | Throwable t = getExceptionType(e, RoutingException.class); |
94 | 4 | if (t != null) |
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{ |
96 | 0 | RoutingException re = (RoutingException) t; |
97 | 0 | handleRoutingException(re.getUmoMessage(), re.getEndpoint(), e); |
98 | 0 | return; |
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} |
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|
101 | 4 | t = getExceptionType(e, MessagingException.class); |
102 | 4 | if (t != null) |
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{ |
104 | 0 | MessagingException me = (MessagingException) t; |
105 | 0 | handleMessagingException(me.getUmoMessage(), e); |
106 | 0 | return; |
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} |
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|
109 | 4 | t = getExceptionType(e, LifecycleException.class); |
110 | 4 | if (t != null) |
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{ |
112 | 0 | LifecycleException le = (LifecycleException) t; |
113 | 0 | handleLifecycleException(le.getComponent(), e); |
114 | 0 | if (RequestContext.getEventContext() != null) |
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{ |
116 | 0 | handleMessagingException(RequestContext.getEventContext().getMessage(), e); |
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} |
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else |
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{ |
120 | 0 | logger.info("There is no current event available, routing Null message with the exception"); |
121 | 0 | handleMessagingException(new MuleMessage(NullPayload.getInstance()), e); |
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} |
123 | 0 | return; |
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} |
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|
126 | 4 | handleStandardException(e); |
127 | 4 | } |
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protected Throwable getExceptionType(Throwable t, Class exceptionType) |
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{ |
131 | 24 | while (t != null) |
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{ |
133 | 12 | if (exceptionType.isAssignableFrom(t.getClass())) |
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{ |
135 | 0 | return t; |
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} |
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|
138 | 12 | t = t.getCause(); |
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} |
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141 | 12 | return null; |
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} |
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public final synchronized void initialise() throws InitialisationException |
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{ |
154 | 574 | if (!initialised.get()) |
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{ |
156 | 508 | doInitialise(); |
157 | 508 | initialised.set(true); |
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} |
159 | 574 | } |
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protected void doInitialise() throws InitialisationException |
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{ |
163 | 508 | logger.info("Initialising exception listener: " + toString()); |
164 | 508 | for (Iterator iterator = endpoints.iterator(); iterator.hasNext();) |
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{ |
166 | 0 | UMOEndpoint umoEndpoint = (UMOEndpoint) iterator.next(); |
167 | 0 | umoEndpoint.initialise(); |
168 | 0 | } |
169 | 508 | } |
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protected void markTransactionForRollback() |
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{ |
178 | 8 | UMOTransaction tx = TransactionCoordination.getInstance().getTransaction(); |
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try |
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{ |
181 | 8 | if (tx != null) |
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{ |
183 | 0 | tx.setRollbackOnly(); |
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} |
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} |
186 | 0 | catch (TransactionException e) |
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{ |
188 | 0 | logException(e); |
189 | 8 | } |
190 | 8 | } |
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protected void routeException(UMOMessage message, UMOImmutableEndpoint failedEndpoint, Throwable t) |
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{ |
209 | 4 | UMOEndpoint endpoint = getEndpoint(t); |
210 | 4 | if (endpoint != null) |
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{ |
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try |
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{ |
214 | 0 | logger.error("Message being processed is: " + (message == null ? "null" : message.toString())); |
215 | 0 | UMOEventContext ctx = RequestContext.getEventContext(); |
216 | 0 | String component = "Unknown"; |
217 | 0 | UMOEndpointURI endpointUri = null; |
218 | 0 | if (ctx != null) |
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{ |
220 | 0 | if (ctx.getComponentDescriptor() != null) |
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{ |
222 | 0 | component = ctx.getComponentDescriptor().getName(); |
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} |
224 | 0 | endpointUri = ctx.getEndpointURI(); |
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} |
226 | 0 | else if (failedEndpoint != null) |
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{ |
228 | 0 | endpointUri = failedEndpoint.getEndpointURI(); |
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} |
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ExceptionMessage msg; |
231 | 0 | msg = new ExceptionMessage(getErrorMessagePayload(message), t, component, endpointUri); |
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UMOMessage exceptionMessage; |
234 | 0 | if (ctx == null) |
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{ |
236 | 0 | exceptionMessage = new MuleMessage(msg); |
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} |
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else |
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{ |
240 | 0 | exceptionMessage = new MuleMessage(msg, ctx.getMessage()); |
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} |
242 | 0 | UMOEvent exceptionEvent = new MuleEvent(exceptionMessage, endpoint, new MuleSession( |
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exceptionMessage, new MuleSessionHandler()), true); |
244 | 0 | exceptionEvent = RequestContext.setEvent(exceptionEvent); |
245 | 0 | endpoint.send(exceptionEvent); |
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|
247 | 0 | if (logger.isDebugEnabled()) |
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{ |
249 | 0 | logger.debug("routed Exception message via " + endpoint); |
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} |
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|
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} |
253 | 0 | catch (UMOException e) |
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{ |
255 | 0 | logFatal(message, e); |
256 | 0 | } |
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} |
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else |
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{ |
260 | 4 | markTransactionForRollback(); |
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} |
262 | 4 | } |
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protected Object getErrorMessagePayload(UMOMessage message) |
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{ |
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try |
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{ |
268 | 0 | return message.getPayloadAsString(); |
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} |
270 | 0 | catch (Exception e) |
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{ |
272 | 0 | logException(e); |
273 | 0 | logger.info("Failed to read message payload as string, using raw payload"); |
274 | 0 | return message.getPayload(); |
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} |
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} |
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protected UMOEndpoint getEndpoint(Throwable t) |
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{ |
290 | 4 | if (endpoints.size() > 0) |
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{ |
292 | 0 | return (UMOEndpoint) endpoints.get(0); |
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} |
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else |
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{ |
296 | 4 | return null; |
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} |
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} |
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protected void logException(Throwable t) |
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{ |
307 | 0 | UMOException umoe = ExceptionHelper.getRootMuleException(t); |
308 | 0 | if (umoe != null) |
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{ |
310 | 0 | logger.error(umoe.getDetailedMessage()); |
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} |
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else |
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{ |
314 | 0 | logger.error("Caught exception in Exception Strategy: " + t.getMessage(), t); |
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} |
316 | 0 | } |
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protected void logFatal(UMOMessage message, Throwable t) |
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{ |
328 | 0 | logger.fatal( |
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"Failed to dispatch message to error queue after it failed to process. This may cause message loss." |
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+ (message == null ? "" : "Logging Message here: \n" + message.toString()), t); |
331 | 0 | } |
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public boolean isInitialised() |
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{ |
335 | 0 | return initialised.get(); |
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} |
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protected void fireNotification(ExceptionNotification notification) |
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{ |
347 | 4 | MuleManager.getInstance().fireNotification(notification); |
348 | 4 | } |
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public abstract void handleMessagingException(UMOMessage message, Throwable e); |
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public abstract void handleRoutingException(UMOMessage message, UMOImmutableEndpoint endpoint, Throwable e); |
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public abstract void handleLifecycleException(Object component, Throwable e); |
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public abstract void handleStandardException(Throwable e); |
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} |