Not sure if this is exactly what everyone is looking for, but if you are working against master (0.3.1-SNAPSHOT) then the ProcessContext interface now has two new methods:
boolean hasIncomingConnection(); boolean hasConnection(Relationship relationship); This way a processor can check hasIncomingConnection() to know if it should expect incoming FlowFiles, and can check hasConnection(Relationship) to know if it should even bother transferring a FlowFile to an outgoing relationship. These were added in support of making ExecuteSQL work with and without incoming FlowFiles [1]. -Bryan [1] https://issues.apache.org/jira/browse/NIFI-932 On Tue, Sep 22, 2015 at 6:32 AM, Joe Witt <[email protected]> wrote: > Hello > > Addressing Grace's question: > > What you are looking for is 'context' and the way context is included > is on attributes of a given FlowFile. You can, for example, use > UpdateAttribute to set that context in the proper part of the flow > preceding your custom processor. > > Addressing Rick's comment: > > I think we mentioned we could add a way to annotate relationships on > processors as being auto-terminated by default. Not aware of a JIRA > for this yet though. It simply provides a way for the processor to > developer to signal the default behavior is that a relationship is > unused and that is ok vs our current approach which says each > relationship must be chosen as terminated or connected. > > Thanks > Joe > > On Mon, Sep 21, 2015 at 11:26 PM, Rick Braddy <[email protected]> wrote: > > Me, too. > > > > And I need the ability to determine which connection(s) are linked to > each relationship, along with a way to auto-terminate unused relationships > from my processor. > > > > Thanks > > Rick > > > >> On Sep 21, 2015, at 10:22 PM, Huang, Jie <[email protected]> wrote: > >> > >> Hi all, > >> > >> I need to get the connection information or parents for further action > in onTriger event. > >> Is there any way to get the upstream connections or parent processors > from any customized Processor? > >> > >> Thank you && Best Regards, > >> Grace （Huang Jie) > >> >
