How to Configure Response Messages

In the Mediator routing rules, you can specify how to handle the response messages in synchronous and asynchronous interactions. For synchronous interactions, you can specify the transformations and assignments for the response and the fault message. You can forward the response and the fault message to another service or event, or you can send them back to the initial caller, if the initial caller is expecting responses and faults.

For asynchronous interactions, you can specify transformations and assignments, and a timeout period for receiving the response. The timeout period can be specified in seconds, hours, days, months, or years. By default, the timeout period is infinite. If a callback response does not come within the specified timeout period, a timeout response can be forwarded to another service, to another event, or back to the initial caller.

You cannot route a Mediator response to a two-way service. If you want to route a response to a two-way service, you should use a one-way Mediator between the first Mediator and the two-way service. The response should first be forwarded to the one-way Mediator, which in turn should call the two-way service.

Note:

Zero is an unsupported value to be specified as a timeout period.
If the callback is received and processing of the callback fails, by default the timeout handler is invoked for processing the action specified in the timeout handler.
Typically, the caller receives the callback after waiting for 100 milliseconds. However, if you have a bridge Mediator with a sequential routing rule and a connection to a synchronous interface service, then due to the complex flow of the program with all sequential routing rules, the caller may take longer to get ready to receive the callback. You can work around this issue by changing the routing rule of the bridge Mediator to parallel.

To specify a timeout period for asynchronous processing:

The following steps are performed in the Routing Rules section of the Mediator Editor.

Next to the <<Target Operation>> field by the Timeout in field in the Callback section, click the Browse for target service operation icon.

The Target Type dialog appears.
Select Service, Event, or Initial Caller.

If you selected Service or Event, the Target Service or the Event Chooser appears depending on your selection.
Select an event or service.
Click OK
In the Timeout in field, enter the number of units for the timeout period, and then select the unit of time from the dropdown list.

The timeout response is forwarded to the specified service or event.

Note:

If the number of routing rules is larger and the time taken to execute the routing rules exceeds the transaction timeout, you must set the transaction timeout to a value that is greater than the time taken to execute all the routing rules.