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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 | 0 | public abstract class AbstractExceptionListener implements ExceptionListener, Initialisable |
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{ |
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55 | 0 | protected transient Log logger = LogFactory.getLog(getClass()); |
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|
57 | 0 | protected List endpoints = new CopyOnWriteArrayList(); |
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|
59 | 0 | 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 | 0 | fireNotification(new ExceptionNotification(e)); |
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|
92 | 0 | Throwable t = getExceptionType(e, RoutingException.class); |
93 | 0 | if (t != null) |
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{ |
95 | 0 | RoutingException re = (RoutingException) t; |
96 | 0 | handleRoutingException(re.getUmoMessage(), re.getEndpoint(), e); |
97 | 0 | return; |
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} |
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|
100 | 0 | t = getExceptionType(e, MessagingException.class); |
101 | 0 | if (t != null) |
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{ |
103 | 0 | MessagingException me = (MessagingException) t; |
104 | 0 | handleMessagingException(me.getUmoMessage(), e); |
105 | 0 | return; |
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} |
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|
108 | 0 | t = getExceptionType(e, LifecycleException.class); |
109 | 0 | if (t != null) |
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{ |
111 | 0 | LifecycleException le = (LifecycleException) t; |
112 | 0 | handleLifecycleException(le.getComponent(), e); |
113 | 0 | if (RequestContext.getEventContext() != null) |
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{ |
115 | 0 | handleMessagingException(RequestContext.getEventContext().getMessage(), e); |
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} |
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else |
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{ |
119 | 0 | logger.info("There is no current event available, routing Null message with the exception"); |
120 | 0 | handleMessagingException(new MuleMessage(NullPayload.getInstance()), e); |
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} |
122 | 0 | return; |
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} |
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|
125 | 0 | handleStandardException(e); |
126 | 0 | } |
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protected Throwable getExceptionType(Throwable t, Class exceptionType) |
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{ |
130 | 0 | while (t != null) |
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{ |
132 | 0 | if (exceptionType.isAssignableFrom(t.getClass())) |
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{ |
134 | 0 | return t; |
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} |
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|
137 | 0 | t = t.getCause(); |
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} |
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|
140 | 0 | return null; |
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} |
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public final synchronized void initialise() throws InitialisationException |
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{ |
153 | 0 | if (!initialised.get()) |
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{ |
155 | 0 | doInitialise(); |
156 | 0 | initialised.set(true); |
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} |
158 | 0 | } |
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protected void doInitialise() throws InitialisationException |
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{ |
162 | 0 | logger.info("Initialising exception listener: " + toString()); |
163 | 0 | for (Iterator iterator = endpoints.iterator(); iterator.hasNext();) |
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{ |
165 | 0 | UMOEndpoint umoEndpoint = (UMOEndpoint) iterator.next(); |
166 | 0 | umoEndpoint.initialise(); |
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} |
168 | 0 | } |
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protected void markTransactionForRollback() |
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{ |
177 | 0 | UMOTransaction tx = TransactionCoordination.getInstance().getTransaction(); |
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try |
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{ |
180 | 0 | if (tx != null) |
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{ |
182 | 0 | tx.setRollbackOnly(); |
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} |
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} |
185 | 0 | catch (TransactionException e) |
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{ |
187 | 0 | logException(e); |
188 | 0 | } |
189 | 0 | } |
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protected void routeException(UMOMessage message, UMOImmutableEndpoint failedEndpoint, Throwable t) |
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{ |
208 | 0 | UMOEndpoint endpoint = getEndpoint(t); |
209 | 0 | if (endpoint != null) |
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{ |
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try |
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{ |
213 | 0 | logger.error("Message being processed is: " + (message == null ? "null" : message.toString())); |
214 | 0 | UMOEventContext ctx = RequestContext.getEventContext(); |
215 | 0 | String component = "Unknown"; |
216 | 0 | UMOEndpointURI endpointUri = null; |
217 | 0 | if (ctx != null) |
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{ |
219 | 0 | if (ctx.getComponentDescriptor() != null) |
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{ |
221 | 0 | component = ctx.getComponentDescriptor().getName(); |
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} |
223 | 0 | endpointUri = ctx.getEndpointURI(); |
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} |
225 | 0 | else if (failedEndpoint != null) |
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{ |
227 | 0 | endpointUri = failedEndpoint.getEndpointURI(); |
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} |
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ExceptionMessage msg; |
230 | 0 | msg = new ExceptionMessage(getErrorMessagePayload(message), t, component, endpointUri); |
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|
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UMOMessage exceptionMessage; |
233 | 0 | if (ctx == null) |
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{ |
235 | 0 | exceptionMessage = new MuleMessage(msg); |
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} |
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else |
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{ |
239 | 0 | exceptionMessage = new MuleMessage(msg, ctx.getMessage()); |
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} |
241 | 0 | UMOEvent exceptionEvent = new MuleEvent(exceptionMessage, endpoint, new MuleSession( |
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exceptionMessage, new MuleSessionHandler()), true); |
243 | 0 | exceptionEvent = RequestContext.setEvent(exceptionEvent); |
244 | 0 | endpoint.send(exceptionEvent); |
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|
246 | 0 | if (logger.isDebugEnabled()) |
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{ |
248 | 0 | logger.debug("routed Exception message via " + endpoint); |
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} |
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|
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} |
252 | 0 | catch (UMOException e) |
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{ |
254 | 0 | logFatal(message, e); |
255 | 0 | } |
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} |
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else |
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{ |
259 | 0 | markTransactionForRollback(); |
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} |
261 | 0 | } |
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protected Object getErrorMessagePayload(UMOMessage message) |
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{ |
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try |
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{ |
267 | 0 | return message.getPayloadAsString(); |
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} |
269 | 0 | catch (Exception e) |
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{ |
271 | 0 | logException(e); |
272 | 0 | logger.info("Failed to read message payload as string, using raw payload"); |
273 | 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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{ |
289 | 0 | if (endpoints.size() > 0) |
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{ |
291 | 0 | return (UMOEndpoint) endpoints.get(0); |
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} |
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else |
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{ |
295 | 0 | return null; |
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} |
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} |
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protected void logException(Throwable t) |
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{ |
306 | 0 | UMOException umoe = ExceptionHelper.getRootMuleException(t); |
307 | 0 | if (umoe != null) |
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{ |
309 | 0 | logger.error(umoe.getDetailedMessage()); |
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} |
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else |
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{ |
313 | 0 | logger.error("Caught exception in Exception Strategy: " + t.getMessage(), t); |
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} |
315 | 0 | } |
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protected void logFatal(UMOMessage message, Throwable t) |
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{ |
327 | 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); |
330 | 0 | } |
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public boolean isInitialised() |
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{ |
334 | 0 | return initialised.get(); |
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} |
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protected void fireNotification(ExceptionNotification notification) |
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{ |
346 | 0 | MuleManager.getInstance().fireNotification(notification); |
347 | 0 | } |
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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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} |