1. Copy JARs 2. Create jdoconfig.xml 3. Obtain a PersistenceManager http://code.google.com/appengine/docs/java/datastore/usingjdo.html
What do you exactly mean by "create the DB connection"? Just obtain the persistence manager ...and persist. On Jul 24, 5:06 pm, genjlc <[email protected]> wrote: > I am trying to connect to the datastore from within the confines of an > app. The app (client) is currently looping through an array of > strings, where every string is a URL to a pic. The client is > periodically bugging the server for some data that it then displays to > the user. This is all static and has no user > interaction.http://cd-jks-countdown-app-v2.appspot.com/ > > The ideal is to allow the user to search the DB by any number of > filters (first name, last name, event, ,,, ) So I am setting up the > client to capture the user's search parameters and pass them to the > server, I am trying to get the server to build a query and ask the DB > for the correct result set. The server would then pass the list of > strings to the client and the client would only loop through those > photos. This implies, however, that I can: > > 1. Connect to the DB. > 2, Pass the query to the DB and get a result set back > 3. That I can load data to the DB to be queried against. > > I think I have the "Add data" part correct: > PersistenceManager.persist(entity). > I think I have the entity correct. Basically a standard bean with > getter and setters for the instance variables, with the exception of > the primary kay (auto assigned Long), and a few annotation tags. > I think I have the query portion correct. Dynamically builds the > WHERE clause based on the parameters passed to it: if (firstName != > null) query.append(blah) > (There is lots of information, online, about what to do when you have > the connection) > > I haven't, however, figured out how to create the DB connection for > the server to use. > (There isn't any information about how to establish the connection, in > Java at least) > > This is supposed to be a learning app, its only my second GWT app, but > it is rapidly becoming an exercise in extreme frustration. > > On Jul 22, 2:34 pm, Christoffer Viken <[email protected]> wrote: > > > > > are you trying to use it trough another platform? > > You can't connect to the datastore, you can only use it (from within a > > AppEngine app) as i understand it (and that makes sense) > > You could expose the datastore to your app (on 3p server) trough a REST API > > that you deploy to AppEngine (unless that breaks the TOS) > > > On Thu, Jul 22, 2010 at 10:28 PM, genjlc <[email protected]> wrote: > > > I've made a simple Client/Server/Shared app that I would like to add > > > data to. I am trying to use Google's data store. > > > > I have been reading for two days and have yet to find a step by step > > > checklist/example of how to establish a connection to the cloud, in > > > Java, without resorting to PHP. There seems to be lots of information > > > on what to do once the connection is made, but no information on > > > actually establishing the connection > > > > -- > > > You received this message because you are subscribed to the Google Groups > > > "Google App Engine" group. > > > To post to this group, send email to [email protected]. > > > To unsubscribe from this group, send email to > > > [email protected]<google-appengine%2bunsubscrib[email protected]> > > > . > > > For more options, visit this group at > > >http://groups.google.com/group/google-appengine?hl=en.-Hide quoted text - > > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "Google App Engine" 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?hl=en.
