Composers (like PackageFileContents in FileGatewayListener)

[bsheward]

The PackageFileContents composer in the FileGatewayListener is invoked using reflection.

Is there a reason why it doesn't implement an interface, so it can be invoked as a type of Composer?

Also, it seems likely that a user might want to configure a composer, for example, if I wanted to put the contents of a file into a named attachment rather than the body of the Message, I might want to configure the name of the attachment to use.

The PackageFileContents is an inner class with access to the configuration of the FileGatewayListener, but external classes wouldn't have this benefit. Is there any way to support configurable composers?

[tfennelly]

This is just one of a number of issues with this listener type. We're currently debating the best approach to take on these, so stay tuned. One way or another, those composers will be changed to implement the MessageComposer interface, it's just a case of when. We're not sure of the logic as to why it wasn't done this way to start.

[marklittle]

Just to put Tom's comments into context, remember that we inherited a lot of the core code through a partner donation.