I actually thought of the same.. DTO. But I have no idea how to implement that.. so going through the DTO documentations over net
On Wed, Aug 18, 2010 at 6:20 PM, Arthur Kalmenson <[email protected]>wrote: > You'll have to build a DTO to transfer these objects to the client > side, I don't think GWT understands GAE Key objects. See this: > http://code.google.com/webtoolkit/doc/latest/RefJreEmulation.html > > -- > Arthur Kalmenson > > > > On Wed, Aug 18, 2010 at 8:03 AM, Tan Duy <[email protected]> wrote: > > I also have some problems when I use JDO in GAE + GWT > > > > [ERROR] Errors in 'file:/I:/Workspace/jdo/src/com/jdo/util/ > > Employee.java' > > [ERROR] Line 2: The import com.google.appengine cannot be > > resolved > > [ERROR] Line 14: Key cannot be resolved to a type > > [ERROR] Line 33: Key cannot be resolved to a type > > [ERROR] Line 34: Key cannot be resolved to a type > > [ERROR] Errors in 'file:/I:/Workspace/jdo/src/com/jdo/util/PMF.java' > > [ERROR] Line 7: No source code is available for type > > javax.jdo.PersistenceManagerFactory; did you forget to inherit a > > required module? > > [ERROR] Line 8: No source code is available for type > > javax.jdo.JDOHelper; did you forget to inherit a required module? > > [ERROR] Errors in 'file:/I:/Workspace/jdo/src/com/jdo/client/Jdo.java' > > [ERROR] Line 23: No source code is available for type > > javax.jdo.PersistenceManager; did you forget to inherit a required > > module? > > > > I don't know what I need to declare in xxx.gwt.xml. > > What should I check? > > > > Thanks for your helps > > > > On Aug 18, 4:29 am, lineman78 <[email protected]> wrote: > >> Yeah, I ran into this issue a year ago when I was working with GAE + > >> GWT-RPC. The client side objectcannothave references to any code > >> not associated with a GWT module, so there are a few options for you > >> here. > >> > >> 1) create a translator and maintain 2 versions of the class; 1 for the > >> client(without annotations) and 1 for the server(with annotations) > >> 2) use Java serialization to make a deep copy with 2 versions of the > >> class like specified above (serializeable uuids must be equal). > >> 3) write a utility that uses reflection to translate between the > >> objects above > >> 4) use some sort of 3rd party library that allows for persistence and > >> serialization. > >> > >> There are more options that I haven't listed here, but these are a few > >> to start. > >> > >> On Aug 17, 12:55 pm, Jeff Schnitzer <[email protected]> wrote: > >> > >> > This is a major PITA with GAE+JPA. You'll likely also need to detach > >> > your entities from the JPA session, which AFAIK is impossible with the > >> > JPA interface - only with the JDO interface. > >> > >> > My advice is throw out JPA and use Objectify. You can use your > >> > entities in GWT as-is (assuming they are client-safe), even if they > >> > reference Key or GeoPt or other datastore classes. Objectify provides > >> > GWT emulation for all those classes: > >> > >> >http://code.google.com/p/objectify-appengine/wiki/ObjectifyWithGWT > >> > >> > (I'm the lead developer of Objectify, and I use it with GWT in my > >> > applications every day) > >> > >> >http://code.google.com/p/objectify-appengine/ > >> > >> > Jeff > >> > >> > On Sat, Aug 14, 2010 at 2:26 AM, cokol <[email protected]> > wrote: > >> > > again - you shall not have any references inside your translatable > >> > > classes to classes from 3rd party! translatable classes are those to > >> > > be compiled to javascript and which reside in client and shared > >> > > packages. 3rd party classes are those where you dont have sourcecode > >> > > from. > >> > >> > > consider your Employee just to be a bean or container without any > >> > > logic just with a purpose to carry payload data. so design the class > >> > > NOT to use any classes from appengine like Key, BlobKey etc > >> > >> > > On 14 Aug., 07:05, "Sree ..." <[email protected]> wrote: > >> > >> Modified the Employee.java as below > >> > >> > >> *public class Employee implements IsSerializable{* > >> > >> > >> then moved the Employee.java to shared package. [eclipse updated > all > >> > >> references well] > >> > >> Now when I GWT to compile its saying > >> > >> > >> Compiling module project.xxx > >> > >> Validating newly compiled units > >> > >> [ERROR] Errors in 'file:/C:/xxx/src/xxx/shared/Employee.java' > >> > >> [ERROR] Line 10: > Theimportcom.google.appenginecannotberesolved > >> > >> [ERROR] Line 11: > Theimportcom.google.appenginecannotberesolved > >> > >> [ERROR] Line 19: Keycannotberesolvedto a type > >> > >> [ERROR] Line 101: BlobKeycannotberesolvedto a type > >> > >> [ERROR] Line 141: Keycannotberesolvedto a type > >> > >> [ERROR] Line 189: Keycannotberesolvedto a type > >> > >> [ERROR] Line 190: Keycannotberesolvedto a type > >> > >> [ERROR] Line 305: Keycannotberesolvedto a type > >> > >> [ERROR] Line 306: Keycannotberesolvedto a type > >> > >> [ERROR] Line 424: BlobKeycannotberesolvedto a type > >> > >> [ERROR] Line 425: BlobKeycannotberesolvedto a type > >> > >> [ERROR] Line 431: BlobKeycannotberesolvedto a type > >> > >> [ERROR] Line 432: BlobKeycannotberesolvedto a type > >> > >> Finding entry point classes > >> > >> [ERROR] Unable to find type 'xxx.client.Example' > >> > >> [ERROR] Hint: Previous compiler errors may have made this > type > >> > >> unavailable > >> > >> [ERROR] Hint: Check the inheritance chain from your > module; it may > >> > >> not be inheriting a required module or a module may not be adding > its source > >> > >> path entries properly > >> > >> Picked up JAVA_TOOL_OPTIONS: -agentlib:jvmhook > >> > >> > >> Why appengineimportstatements are not working! Again they should be > only > >> > >> in server folder? > >> > >> > >> On Sat, Aug 14, 2010 at 6:17 AM, Sree ... <[email protected]> > wrote: > >> > >> > okey... thanks alot guys.... > >> > >> > i ll try to make those changes and will update here > >> > >> > >> > also thx for so quick responses.. am loving it > >> > >> > >> > On Sat, Aug 14, 2010 at 2:31 AM, cokol <[email protected]> > wrote: > >> > >> > >> >> hi the problem is that gwt does not have source of your Employee > >> > >> >> class, since you have put it into the server package, you always > have > >> > >> >> 3 packages to handle (as per default): > >> > >> > >> >> client > >> > >> >> server > >> > >> >> shared > >> > >> > >> >> everything under "client" becomes javascript after compilation > and is > >> > >> >> not aware of anything contained in "server" package, everything > >> > >> >> contained in server package is intended to run in java VM and > remains > >> > >> >> java, here you may have references to classes used in client > package > >> > >> >> if you like, this would not break up gwt. the shared package > contains > >> > >> >> everything what is required for client and server package, like > the > >> > >> >> service interfaces AND transfer objects & payload classes like > your > >> > >> >> Employee. furthermore everything whats inside client and shared > >> > >> >> package has to be translatable to javascript, i.e. you shall not > use > >> > >> >> 3rd party libraries in there. > >> > >> > >> >> so just move the Employee and all related (payload) classes to > the > >> > >> >> shared (or client) package and you are done > >> > >> > >> >> On 13 Aug., 19:39, "Sree ..." <[email protected]> wrote: > >> > >> >> > Am not sure this belongs to GWT or GAE or both ... > >> > >> > >> >> > So here's my problem... > >> > >> > >> >> > I have one client/Example.java [contains all GWT code] calls a > methods > >> > >> >> on > >> > >> >> > server/SomeServiceImpl.java [Contains code to talk to > dataStore] > >> > >> > >> >> > Wat server/SomeServiceImpl.java does is Featch data from > Employee.Java > >> > >> >> > .... [this is class used to store data in datastore JPA] > >> > >> > >> >> > So now my problem is.. as long as I send data in the form of > String or > >> > >> >> > StringArray to client/Example.java am fine, but now I tried to > send > >> > >> >> > List<Employee> to client/Example.java > >> > >> > >> >> > Doing so throws me an error as below.. > >> > >> > >> >> > Validating newly compiled units > >> > >> >> > [ERROR] Errors in > >> > >> >> > 'file:/C:/XXX/XXX/src/xxx/client/GreetingServiceAsync.java' > >> > >> >> > [ERROR] Line 18: No source code is available for type > >> > >> >> > xxx.server.Employee; did you forget to inherit a required > module? > >> > >> >> > [ERROR] Errors in > 'file:/C:/XXX/XXX/src/client/Example.java' > >> > >> >> > [ERROR] Line 325: No source code is available for > type > >> > >> >> > xxx.server.Employee; did you forget to inherit a required > module? > >> > >> >> > [ERROR] Errors in > >> > >> >> 'file:/C:/XXX/XXX/src/client/GreetingService.java' > >> > >> >> > [ERROR] Line 19: No source code is available for type > >> > >> >> > xxx.server.Employee; did you forget to inherit a required > module? > >> > >> >> > Finding entry point classes > >> > >> >> > [ERROR] Unable to find type 'xxx.client.Example' > >> > >> >> > [ERROR] Hint: Previous compiler errors may have made > this type > >> > >> >> > unavailable > >> > >> >> > [ERROR] Hint: Check the inheritance chain from your > module; it > >> > >> >> may > >> > >> >> > not be inheriting a required module or a module may not be > adding its > >> > >> >> source > >> > >> >> > path entries properly > >> > >> > >> >> > -- > >> > >> >> > -Thanks > >> > >> >> > -Srikanth.G > >> > >> >> > -Hyderabad > >> > >> > >> >> -- > >> > >> >> You received this message because you are subscribed to the > Google Groups > >> > >> >> "Google Web Toolkit" group. > >> > >> >> To post to this group, send email to > [email protected]. > >> > >> >> To unsubscribe from this group, send email to > >> > >> >> [email protected]<google-web-toolkit%[email protected]><google-web-toolkit%2Bunsubs > [email protected]> > >> > >> >> . > >> > >> >> For more options, visit this group at > >> > >> >>http://groups.google.com/group/google-web-toolkit?hl=en. > >> > >> > >> > -- > >> > >> > -Thanks > >> > >> > -Srikanth.G > >> > >> > -Google India Ltd > >> > >> > -Hyderabad > >> > >> > >> -- > >> > >> -Thanks > >> > >> -Srikanth.G > >> > >> -Google India Ltd > >> > >> -Hyderabad > >> > >> > > -- > >> > > You received this message because you are subscribed to the Google > Groups "Google Web Toolkit" group. > >> > > To post to this group, send email to > [email protected]. > >> > > To unsubscribe from this group, send email to > [email protected]<google-web-toolkit%[email protected]> > . > >> > > For more options, visit this group athttp:// > groups.google.com/group/google-web-toolkit?hl=en. > > > > -- > > You received this message because you are subscribed to the Google Groups > "Google Web Toolkit" group. > > To post to this group, send email to [email protected] > . > > To unsubscribe from this group, send email to > [email protected]<google-web-toolkit%[email protected]> > . > > For more options, visit this group at > http://groups.google.com/group/google-web-toolkit?hl=en. > > > > > > -- > You received this message because you are subscribed to the Google Groups > "Google Web Toolkit" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<google-web-toolkit%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/google-web-toolkit?hl=en. > > -- -Thanks -Srikanth.G -Google India Ltd -Hyderabad -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. 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