bundles/org.simantics.document.server/src/org/simantics/document/server/handler/EventHandler.java

   1 package org.simantics.document.server.handler;\r
   2 \r
   3 import org.simantics.Simantics;\r
   4 import org.simantics.db.ReadGraph;\r
   5 import org.simantics.db.exception.DatabaseException;\r
   6 import org.simantics.db.request.Read;\r
   7 import org.simantics.document.server.io.CommandContext;\r
   8 import org.simantics.document.server.io.CommandResult;\r
   9 import org.simantics.document.server.serverResponse.Error;\r
  10 import org.simantics.document.server.serverResponse.IDelayedResponse;\r
  11 import org.simantics.document.server.serverResponse.ServerResponse;\r
  12 \r
  13 public abstract class EventHandler extends AbstractEventHandler {\r
  14         \r
  15     protected abstract ServerResponse handle(ReadGraph graph, CommandContext parameters) throws DatabaseException;\r
  16 \r
  17     public CommandResult handle(final CommandContext parameters) {\r
  18         try {\r
  19             ServerResponse response = Simantics.getSession().syncRequest(new Read<ServerResponse>() {\r
  20                 @Override\r
  21                 public ServerResponse perform(ReadGraph graph) throws DatabaseException {\r
  22                     return handle(graph, parameters);\r
  23                 }\r
  24             });\r
  25 \r
  26             if(response instanceof IDelayedResponse && !(((IDelayedResponse)response).hasRun())) {\r
  27                 try {\r
  28                     synchronized(response) {\r
  29                         response.wait(20000);\r
  30                     }\r
  31                 } catch (InterruptedException e) {\r
  32                     e.printStackTrace();\r
  33                 }\r
  34             }\r
  35             \r
  36             return response;\r
  37         } catch (DatabaseException e) {\r
  38             e.printStackTrace();\r
  39             return new Error(e.getMessage()); // Return some error\r
  40         }\r
  41     }\r
  42 \r
  43 }\r