bundles/org.simantics.document.server/src/org/simantics/document/server/DocumentHistoryListener.java

   1 package org.simantics.document.server;\r
   2 \r
   3 import java.util.List;\r
   4 \r
   5 import org.simantics.Logger;\r
   6 import org.simantics.db.procedure.Listener;\r
   7 \r
   8 public class DocumentHistoryListener implements Listener<List<JSONObject>> {\r
   9 \r
  10         final private DocumentHistory history;\r
  11     \r
  12     private boolean disposed = false;\r
  13 \r
  14     DocumentHistoryListener(DocumentHistory history) {\r
  15         this.history = history;\r
  16     }\r
  17 \r
  18     @Override\r
  19     public void execute(List<JSONObject> result) {\r
  20         \r
  21         synchronized(history) {\r
  22 \r
  23                         history.refresh(result);\r
  24                 if(!history.hasListeners()) {\r
  25                         history.removeUpdater();\r
  26                         disposed = true;\r
  27                 }\r
  28                 \r
  29         }\r
  30         \r
  31     }\r
  32 \r
  33     @Override\r
  34     public void exception(Throwable t) {\r
  35         Logger.defaultLogError(t);\r
  36     }\r
  37     \r
  38     @Override\r
  39     public boolean isDisposed() {\r
  40         if(!disposed) {\r
  41                 synchronized(history) {\r
  42                         if(!history.hasListeners()) {\r
  43                                 history.removeUpdater();\r
  44                                 disposed = true;\r
  45                         }\r
  46                 }\r
  47         }\r
  48         return disposed;\r
  49     }\r
  50 \r
  51 }\r