Before you begin
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This service can facilitate the parallel processing of multiple routes. The service itself can consist of two separate services within the application:
A scenario where this could be useful is if you receive an online order from a webhook and you need to send the order and tracking information to a dropshipper. In the webhook itself there is no customer or product information which is needed and a tracking number has not been generated. We could use the parallel gateway to retreive the product and customer information and send the request to get a new tracking number at the same time before sending the information to the dropshipper.
In order to get this scenario to work you would add a parallel gateway
fork and three HTTP request services on to the canvas. The
fork would be joined to prior services and would have three routes (one to each HTTP service). The services would be set up for the relevant task (getting product information, getting customer information, creating a tracking number). We would then add a parallel gateway
join and add a route from each service to it before continuing with the workflow.
The scenario could look like this on the canvas (where Start is the incoming webhook and End is the sending of the data to the dropshipper):
When added to the canvas the
fork parallel gateway service will be automatic and not require any further configuration.
The parallel gateway does not specifically need a
join in order to work and will finish without any issues. The
join makes a synchronous workflow outside of parallel processing by waiting until all parallel routes are complete before continuing (similar to async/await in JS). Omitting the
join will lead to an asynchronous workflow where routes could continue in any order.
Example configuration and mapping
There is no required configuration for this service.
This service doesn't require any service data setup.
This service will not provide any output data.