[Question/Suggestion] Pass data of an output channel to the next one

[alexej-d]

Q	A
Bug report?	no
Feature request?	yes
BC Break report?	no
RFC?	no

I was wondering if it is possible to pass some of an output channel's returned data to the next channel in the same workflow?

Imagine you have a custom output channel that creates a PDF and you want to pass the URL of the PDF to the Email channel.

How would you do that? Maybe via a global service that stores the current lifecycle's context variables?

[alexej-d]

Any recommendations @solverat ?

[solverat]

Hey @alexej-d Sorry for the late response, but I need(ed) some time to think about this.

tl;dr: No. Currently, there is no way to fetch data between the channel processes.

We have an internal signal listener/workflow, which is not dispatching after every channel process. It's also not meant to store dynamic data.

However, I just pushed something here:

#504

This will introduce a new object called ChannelContext. It's available in the whole workflow lifecycle and can be retrieved in every ChannelSubjectGuardEvent event or within your custom channel, if you're implementing the ChannelContextAwareInterface interface.

With this, you should be able to pass the PDF to every upcoming channel.

[solverat]

Refs:

• https://github.com/dachcom-digital/pimcore-formbuilder/blob/236e8b97232506c774a055b0dce304ed2771d890/docs/OutputWorkflow/13_ChannelContext.md
• https://github.com/dachcom-digital/pimcore-formbuilder/blob/1ed307c0e6e7d1607dc692bfa26c1a496e6f61a2/docs/OutputWorkflow/30_Events.md

[alexej-d]

Thank you @solverat! Will play with the new addition ASAP!