A client will download a xml file instead of uploading. Records will be created (or updated, deleted) in a table/kind over time and all records from a kind need to be downloaded in form of a xml file, I hope I am explaining the issue bit more clearly.
I am not sure if I could make use of blobstore in this case as it will require update of blobstore object (in background may be using task) every time a record gets added/updated/deleted i.e. if I create xml file programmaticaly and store as blobstore object. On Nov 29, 5:14 pm, Didier Durand <[email protected]> wrote: > Hi, > > To emulate files, you have to use the Blob object in the datastore to > store such xml content: see com.google.appengine.api.datastore.Blob > inhttp://code.google.com/appengine/docs/java/datastore/dataclasses.html... > > Blob has a limited max size: 1 Mbyte. So, you can use a collection > (Vector, List, etc..) of Blobs if you need more than 1 Mbytes. > > If your files get uploaded by a client, you can use the Blobstore > where the max size is much bigger(2 Gbytes): > seehttp://code.google.com/appengine/docs/java/blobstore/overview.html > > You have to associate the blob with some other fields (name, size, > last_updated) in you pojo to reproduce what you expect from a file. > > N.B. if you need to emulate a directory tree, you also have to write > it by yourself. > > Finally, I would recommend alternative Objectify rather than standard > JDO for such services. > > Hope this helps > > regards > didier > > On Nov 29, 5:53 pm, pac <[email protected]> wrote: > > > In a website I need to provide a feature to get data in xml format > > i.e. some url > > > e.g.http://www.mysite.com../data.xml > > > I think in gae I can not create a file. Any suggestions to create such > > feature to get data from data store in this way? > > > Data store will have large number of records, so in general, a file > > created from that could be of good few MBs. -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
