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Message Tracing is used to trace, track and visualize a message's body in each intermediate stage of its transmission. This is useful for a number of reasons, including auditing and debugging. You use the Activity Dashboard of WSO2 BAM to trace messages going through WSO2 ESB. It allows you to track and trace messages in real-time within Cassandra, without having to write Hive scripts.

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1. Download and set up WSO2 ESB.
2. Log in to ESB management console and select Features under the Configure menu.
   
3. In the Repository Management tab click Add Repository.
4. Enter a name for the new repository and its URL as http://dist.wso2.org/p2/carbon/releases/4.2.0. Click URL, and click Add.
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5. Go to the Available Features tab and select the newly added repository from the Repository drop-down list. Under Filter by feature name field, enter BAM Message Tracer Handler Aggregate, select Show only the latest versions checkbox and click , and deselect Group features by category checkbox. 
6. Click Find Features.
7. The BAM Select BAM Message Tracer Handler Aggregate feature appears. Select it and click 4.2.2 version from the available features list and click Install.
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8. Click Finish to complete the installation and click Shutdown/Restart on the left navigation menu to restart the server.

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1. On the Configure menu of ESB Management Console, click Message Tracing and then click Message Tracing Configuration.

2. Select all the checkboxes as illustrated below and enter the Receiver URL (in the hostname:port format ((in  tcp://[IP address of localhost]:[thrift port] format), Username and Password that is used by BAM. The default value for both the username and password will be admin.
   

   Info
   Enter For the Receiver URL, enter the thrift port value that is obtained when running the start-up script of BAM, which can be found in the SSH log, for the Receiver URLCarbon log. However, the default WSO2 BAM receiver port is 7611 and if you have set up a port offset, enter the port accordingly. For example, if the port offset is set to 2, enter the port as 7613 as shown below.

   
   
   

3. Click Update to save the settings.

Publishing data to WSO2 BAM

1. After message tracing is configured,

   log

   invoke a deployed service on WSO2 ESB (for example: echo service) for data publishing.

   Tip
   You need to first enable the relevant message tracer feature in WSO2 ESB before deploying the proxy service.

2. Log in to BAM Management Console to test the echo service and management console to check whether data is being published to BAM. 
   

3. On the Tools menu, click Cassandra Explorer and then click Explore Cluster.
   Enter the default values

   as localhost

   as localhost:9160, admin and admin respectively for Connection URL, Username and Password and click Connect.  

   Info
   When entering the port in the connection URL, localhost:9160 should be changed accordingly if a port offset is applied. For example if the port offset is set to 1, then this will be localhost:9161.

4. In Keyspaces, check for the published contents in the BAM_MESSAGE_TRACE column family, which is located in the EVENT_KS keyspace.
   
   
5. As soon as data is published and available, on the Main menu select Activity Dashboard to track and trace messages.
6. In the Connect to Cluster window, enter the same details as entered in step 11 above and click Login.
7. In the Search Activities window, enter the query details related to your search and click Search. For example:
   
   

8. You view the resulting activities of the search query you entered in the previous step as below:
   

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