anchor.diff:  
   Attaching a Message History to the message will provide a list of all applications that the message passed through since its origination.
   
  -During routing Camel captures how the Exchange is routed, as a `org.apache.camel.MessageHistory` entity
  -that is stored on the Exchange. On the `org.apache.camel.MessageHistory` there is information abut the
  -route id, processor id, timestamp, and elapsed time it took to process the Exchange by the processor.
  -
   == Enabling or disabling Message History
   
  -The Message History can be enabled or disabled per CamelContext or per route (enabled by default).
  -For example you can turn it off with
  +The Message History can be enabled or disabled per CamelContext or per route (disabled by default).
  +For example you can turn it on with
   
   [source,java]
   ----
  -camelContext.setMessageHistory(false);
  +camelContext.setMessageHistory(true);
   ----
   
   Or in XML
   
   [source,xml]
   ----
  -<camelContext messageHistory="false">
  +<camelContext messageHistory="true">
   
   </camelContext>
   ----
  
positive.code: 
  [source,text]
  ----
  2013-05-31 14:41:28,084 [ - seda://start] ERROR DefaultErrorHandler            - Failed delivery for (MessageId: ID-davsclaus-air-lan-55446-1370004087263-0-1 on ExchangeId: ID-davsclaus-air-lan-55446-1370004087263-0-3). Exhausted after delivery attempt: 1 caught: java.lang.IllegalArgumentException: Forced to dump message history
  
  Message History
  ---------------------------------------------------------------------------------------------------------------------------------------
  RouteId              ProcessorId          Processor                                                                        Elapsed (ms)
  [route1            ] [to1               ] [log:foo                                                                       ] [         6]
  [route1            ] [to2               ] [direct:bar                                                                    ] [       102]
  [route2            ] [to5               ] [log:bar                                                                       ] [         1]
  [route2            ] [delay2            ] [delay[{100}]                                                                  ] [       100]
  [route2            ] [to6               ] [mock:bar                                                                      ] [         0]
  [route1            ] [delay1            ] [delay[{300}]                                                                  ] [       303]
  [route1            ] [to3               ] [log:baz                                                                       ] [         0]
  [route1            ] [process1          ] [org.apache.camel.processor.MessageHistoryDumpRoutingTest$1$1@6a53f9d8         ] [         2]
  
  Stacktrace
  ---------------------------------------------------------------------------------------------------------------------------------------
  java.lang.IllegalArgumentException: Forced to dump message history
      at org.apache.camel.processor.MessageHistoryDumpRoutingTest$1$1.process(MessageHistoryDumpRoutingTest.java:54)
      at org.apache.camel.processor.DelegateSyncProcessor.process(DelegateSyncProcessor.java:63)
      at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:388)
      at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:189)
      at org.apache.camel.processor.Pipeline.process(Pipeline.java:118)
      at org.apache.camel.processor.Pipeline.process(Pipeline.java:80)
      at org.apache.camel.processor.DelayProcessorSupport.process(DelayProcessorSupport.java:117)
      at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:388)
      at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:189)
      at org.apache.camel.processor.Pipeline.process(Pipeline.java:118)
      at org.apache.camel.processor.Pipeline.process(Pipeline.java:80)
      at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:189)
      at org.apache.camel.component.seda.SedaConsumer.sendToConsumers(SedaConsumer.java:293)
      at org.apache.camel.component.seda.SedaConsumer.doRun(SedaConsumer.java:202)
      at org.apache.camel.component.seda.SedaConsumer.run(SedaConsumer.java:149)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
      at java.lang.Thread.run(Thread.java:722)
  ----
  
  You can turn off logging message history from the Error Handler using
  
  
negative.code: errorHandler(defaultErrorHandler().logExhaustedMessageHistory(false));
  ----
  
  The Error Handler does not log the message body/header details (to avoid logging sensitive message body details).
  You can enable this on the error handler as shown:
  
  [source,java]
  ----
  errorHandler(defaultErrorHandler().logExhaustedMessageBody(true));
  ----
  
  == MessageHistory API
  
  When message history is enabled during routing Camel captures how the Exchange is routed, as a `org.apache.camel.MessageHistory` entity
  that is stored on the Exchange. On the `org.apache.camel.MessageHistory` there is information abut the
  route id, processor id, timestamp, and elapsed time it took to process the Exchange by the processor.
  
  You can access the message history from Java code:
  
  [source,java]
  ----
  List<MessageHistory> list = exchange.getProperty(Exchange.MESSAGE_HISTORY, List.class);
  for (MessageHistory history : list) {
      System.out.println("Routed at id: " + history.getNode().getId());
  }
  ----
  