exist it an other solution ? When i just do this below,it doesn't
work:
Objectify obj =
ObjectifyService.beginTransaction();
obj.put(new Connection("DE PESSEMIER",
"Johann", "projet"));
obj.put(new Connection("AUCQUIERE", "Eric",
"projet"));
obj.getTxn().commit();
But when i do ,it works:
Objectify obj =
ObjectifyService.beginTransaction();
obj.put(new Connection("DE PESSEMIER",
"Johann", "projet"));
obj.getTxn().commit();
obj = ObjectifyService.beginTransaction();
obj.put(new Connection("AUCQUIERE", "Eric",
"projet"));
obj.getTxn().commit();
sorry
On 20 mai, 02:12, Yasuo Higa <[email protected]> wrote:
> Hi laurent,
>
> > You can't work with more than one entity group in a single
> > transaction. This is a limitation of GAE, although other people have
> > built distributed 2pc-style transactions on top of the datastore.
>
> Slim3 supports Global Transactions between multiple entity
> groups:http://sites.google.com/site/slim3appengine/slim3-datastore/transacti...
>
> You may worry about the overhead of global transactions. Don't worry.
> It is not very expensive.
> We prepare the demonstration:http://slim3demo.appspot.com/gtx/
>
> Hope this helps,
>
> Yasuo Higa
>
>
>
> > This should help:
>
> >http://code.google.com/p/objectify-appengine/wiki/Concepts#Transactions
>
> > Jeff
>
> > On Wed, May 19, 2010 at 2:16 PM, laurent <[email protected]> wrote:
> >> i've searched for this error but don't find what it is.
>
> >> my code :
> >> ObjectifyService.register(Lock.class);
> >> ObjectifyService.register(Connection.class);
> >> ObjectifyService.register(Assignment.class);
>
> >> if
> >> (ObjectifyService.begin().query(Connection.class).countAll() ==
> >> 0) {
>
> >> Objectify obj = ObjectifyService.beginTransaction();
> >> obj.put(new Connection("DE PESSEMIER", "Johann",
> >> "projet"));
> >> obj.put(new Connection("AUCQUIERE", "Eric",
> >> "projet"));
>
> >> obj.put(new Lock(1l));
>
> >> obj.getTxn().commit();
> >> }
>
> >> com.google.gwt.user.server.rpc.UnexpectedException: Service method
> >> 'public abstract java.util.List
> >> miro.shared.GreetingService.getConnections()' threw an unexpected
> >> exception: java.lang.IllegalArgumentException: can't operate on
> >> multiple entity groups in a single transaction. found both Element {
> >> type: "Connection"
> >> id: 5
> >> }
> >> and Element {
> >> type: "Connection"
> >> id: 6
> >> }
>
> >> at
> >> com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:
> >> 378)
> >> at
> >> com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:
> >> 581)
> >> at
> >> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:
> >> 188)
> >> at
> >> com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:
> >> 224)
> >> at
> >> com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:
> >> 62)
> >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
> >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
> >> at
> >> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
> >> 511)
> >> at org.mortbay.jetty.servlet.ServletHandler
> >> $CachedChain.doFilter(ServletHandler.java:1166)
> >> at
> >> com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
> >> 51)
> >> at org.mortbay.jetty.servlet.ServletHandler
> >> $CachedChain.doFilter(ServletHandler.java:1157)
> >> at
> >> com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
> >> 43)
> >> at org.mortbay.jetty.servlet.ServletHandler
> >> $CachedChain.doFilter(ServletHandler.java:1157)
> >> at
> >> com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
> >> 122)
> >> at org.mortbay.jetty.servlet.ServletHandler
> >> $CachedChain.doFilter(ServletHandler.java:1157)
> >> at
> >> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
> >> 388)
> >> at
> >> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
> >> 216)
> >> at
> >> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
> >> 182)
> >> at
> >> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
> >> 765)
> >> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
> >> 418)
> >> at
> >> com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
> >> 70)
> >> at
> >> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
> >> 152)
> >> at com.google.appengine.tools.development.JettyContainerService
> >> $ApiProxyHandler.handle(JettyContainerService.java:349)
> >> at
> >> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
> >> 152)
> >> at org.mortbay.jetty.Server.handle(Server.java:326)
> >> at
> >> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
> >> 542)
> >> at org.mortbay.jetty.HttpConnection
> >> $RequestHandler.content(HttpConnection.java:938)
> >> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
> >> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
> >> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> >> at
> >> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
> >> 409)
> >> at org.mortbay.thread.QueuedThreadPool
> >> $PoolThread.run(QueuedThreadPool.java:582)
>
> >> Thanks for your request
>
> >> --
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>
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