Ok that makes sense. What processor would I extend/implement to allow me to send out multiple files from the process that unpacks the NITF bundle? Any examples?
Thank, Pat From: Joe Witt [via Apache NiFi (incubating) Developer List] [mailto:ml-node+s39713n2513...@n7.nabble.com] Sent: Monday, August 17, 2015 1:56 PM To: Jones, Patrick L. <p...@mitre.org> Subject: Re: Process to create multiple files Hello Pat, Yeah makes sense. You would need a custom processor to support the NITF format [1] There does appear to be a Java library to deal with it but its licensing isn't ASL v2 compatible so we're not likely to be able to play along anytime soon. But that should be a good way to get started building what you need. The processor would unpack the items out of the NITF bundle and then could send out the full size images if that is how it works. Those full size images can then be resized to thumbnails. Tons of ways to play this one and it is a very common style of use case. Thanks Joe [1] https://en.wikipedia.org/wiki/National_Imagery_Transmission_Format [2] https://github.com/codice/imaging-nitf On Mon, Aug 17, 2015 at 1:45 PM, plj <[hidden email]</user/SendEmail.jtp?type=node&node=2513&i=0>> wrote: > Howdy, > > Thanks for the reply. I think my situation is different than > you suggest. I have an image file in NITF format. That file may have > multiple images and multiple bands inside that one file. The software that I > have that reads that file does create a thumbnail for each image and each > band inside that file. I don't know how many thumbnails I need until I read > the files metadata. > > > Thank > > Pat > > From: Dan Bress [via Apache NiFi (incubating) Developer List] [mailto:[hidden > email]</user/SendEmail.jtp?type=node&node=2513&i=1>] > Sent: Monday, August 17, 2015 1:40 PM > To: Jones, Patrick L. <[hidden > email]</user/SendEmail.jtp?type=node&node=2513&i=2>> > Subject: Re: Process to create multiple files > > plj, > I would not recommend having this processor create multiple thumbnails. > What I would recommend is the following: > > Create a new processor called "CreateThumbnail" or "RescaleImage" > > Then have a configuration on the processor that says what size the output > image should be(e.g. 128x128, or 1/X of original size). > > Your new processor will read in the incoming image, and rescale it down > to the user specified size and pass it forward. > > Now if you want to create a 128x128 64x64 and 32x32 sized images you > would do the following. > > (GetFile)->(RescaleImage configured to 128x128)->(PutFile) > |->(RescaleImage configured to 64x64)->(PutFile) > \->(RescaleImage configured to 32x32)->(PutFile) > > Where GetFile has 3 success relationships, each going to a different > RescaleImage processor. > > I think it makes more sense to have one processor create one file, then you > can use the flow to visually configure how many copies of the file you want > to make. This should make this processor simpler and more reusable. > > > Dan Bress > Software Engineer > ONYX Consulting Services > > ________________________________________ > From: plj <[hidden email]</user/SendEmail.jtp?type=node&node=2511&i=0>> > Sent: Monday, August 17, 2015 1:27 PM > To: [hidden email]</user/SendEmail.jtp?type=node&node=2511&i=1> > Subject: Process to create multiple files > > Howdy, > > I'm new to NiFi so please bear with me. What I want to accomplish is: > read an image file > process the file to create one or more thumbnails from the image. > Send the resulting thumbnails along the flow > > So I can use GetFile to read the file and then send it along. I think I > need to write a custom java processor that will process the image file and > then send each of the thumbnail files (say .jpg for now) on to the next > thing in the flow (say PutFile for example). > > Are there suggestions on what I should implement or extend to create my > custom processor? It will take in one file and output multiple files. > Would extending "PutFile" so that it processed and then puts each thumbnail > on the flow be a good strategy? 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