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 <linema...@gmail.com> 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 <j...@infohazard.org> 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 <eplisc...@googlemail.com> 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 ..." <gattasrika...@gmail.com> 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 ... <gattasrika...@gmail.com>
> > >> 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 <eplisc...@googlemail.com>
> > >> > 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 ..." <gattasrika...@gmail.com> 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
>
> > >> >> --
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> > >> >> .
> > >> >> 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
>
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