Hello, This pattern isn't really supported at the moment...
You would not want to make calls to external services when opening the config window of a processor because then you risk blocking on an network call if the system is down or unresponsive, or just risking taking a really long time to load. You could possibly attempt to start some background thread when the processor starts that would periodically fetch values to a list in the processor, and then every time getPropertyDescriptors was called you would create a new PropertDescriptor for the given property using the latest list, but there is nothing built in to help with this. It also doesn't work well for documentation which is auto-generated when the application starts and would have no way of knowing what the allowable values are for the property. -Bryan On Mon, Mar 26, 2018 at 9:55 AM, Dominique De Vito <ddv36...@gmail.com> wrote: > Hi, > > I try to define a Processor such as for a given attribut: > > * the possible values are dynamically fetched from a REST WS (from time to > time) > > * the UI offers to select one of these values from a drop-down list. > > Is there some processor implementing such a pattern? If so, then, I may take > it as an example. > > If there is no such processor, does someone know if the Processor I envision > is doable with current NiFi version? > > Thanks. > > Regards, > Dominique >
