| Tracer Example |
| ============== |
| |
| This example shows how to persist Camel trace event messages into a database using JPA. |
| It can be run using Maven or Ant. |
| |
| You will need to compile this example first: |
| mvn compile |
| |
| For a background in tracer and JPA see |
| http://camel.apache.org/tracer.html |
| http://camel.apache.org/jpa.html |
| |
| To run the example with Maven, type |
| mvn camel:run |
| |
| To run the example with Ant |
| a. You need to have Hibernate Core, Entity Manager and HSQLDB installed. |
| They can be downloaded from the following locations |
| Hibernate Core 3.2.6 GA |
| http://www.hibernate.org |
| Hibernate Entity Manager 3.2.0.GA |
| http://prdownloads.sourceforge.net/hibernate/hibernate-entitymanager-3.2.0.GA.zip?download |
| HSQLDB |
| http://hsqldb.org/ |
| |
| b. Export / Set home directories for the above as follows |
| UNIX |
| export HIBERNATE_CORE_HOME=<path to Hibernate install directory> |
| export HIBERNATE_EM_HOME=<path to Hibernate EM install directory> |
| export HSQLDB_HOME=<path to HSQLDB install directory> |
| Windows |
| set HIBERNATE_CORE_HOME=<path to Hibernate install directory> |
| set HIBERNATE_EM_HOME=<path to Hibernate EM install directory> |
| set HSQLDB_HOME=<path to HSQLDB install directory> |
| |
| c. To Run the example using Ant, type |
| ant |
| |
| In the HSQL Database Explorer type |
| select * from camel_messagetraced |
| |
| to see the trace events of the Exchanges. Notice how the Exchange correlates with |
| fromNode/toNode so you exactly can see how a given Exchange was routed in Camel. |
| |
| |
| Using the query: |
| select shortExchangeId, previousNode, toNode, body from camel_messagetraced order by id |
| |
| is a bit more easier to read as it uses the fields we are most interrested in to see how Exchanges |
| was routed in Camel. |
| |
| In the console you can enter some words separated with space. Try to enter: |
| nice beer |
| beer whiskey |
| camel nice day |
| |
| This example will based on the input get some quotes from the input and select the best quote |
| to return as response in the console. |
| |
| To stop the example hit ctrl + c |
| |
| To use log4j as the logging framework add this to the pom.xml: |
| <dependency> |
| <groupId>log4j</groupId> |
| <artifactId>log4j</artifactId> |
| </dependency> |
| and log4j.properties is located in src/main/resources |
| |
| For the latest & greatest documentation on how to use this example please see |
| http://camel.apache.org/tracer-example.htmls |
| |
| If you hit any problems please let us know on the Camel Forums |
| http://camel.apache.org/discussion-forums.html |
| |
| Please help us make Apache Camel better - we appreciate any feedback you may |
| have. Enjoy! |
| |
| ------------------------ |
| The Camel riders! |
| |
| |