Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.impl / src / org / simantics / db / impl / query / AsyncMultiReadEntry.java

diff --git a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/AsyncMultiReadEntry.java b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/AsyncMultiReadEntry.java
new file mode 100644 (file)
index 0000000..9e4f49d
--- /dev/null
+++ b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/AsyncMultiReadEntry.java
@@ -0,0 +1,229 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.db.impl.query;\r
+\r
+import java.util.ArrayList;\r
+\r
+import org.simantics.db.AsyncReadGraph;\r
+import org.simantics.db.common.exception.DebugException;\r
+import org.simantics.db.impl.graph.ReadGraphImpl;\r
+import org.simantics.db.procedure.AsyncMultiProcedure;\r
+import org.simantics.db.request.AsyncMultiRead;\r
+import org.simantics.db.request.RequestFlags;\r
+\r
+final public class AsyncMultiReadEntry<T> extends CacheEntryBase {\r
+\r
+//    public ArrayList<AsyncMultiProcedure<T>> procs = null;\r
+\r
+    protected AsyncMultiRead<T> request;\r
+    \r
+    public AsyncMultiReadEntry(AsyncMultiRead<T> request) {\r
+       this.request = request;\r
+    }\r
+    \r
+    @Override\r
+    int makeHash() {\r
+       return request.hashCode();\r
+    }\r
+    \r
+    @Override\r
+    public Object getOriginalRequest() {\r
+        return request;\r
+    }\r
+    \r
+    @Override\r
+    public void discard() {\r
+       super.discard();\r
+       request = null;\r
+       setResult(null);\r
+    }\r
+    \r
+    final synchronized public void finish(AsyncReadGraph graph) {\r
+       \r
+//     new Exception("finish " + this).printStackTrace();\r
+       \r
+       if(!isPending()) {\r
+               System.err.println("aff");\r
+       }\r
+       \r
+       assert(isPending());\r
+\r
+//        ArrayList<AsyncMultiProcedure<T>> p = null;\r
+\r
+        synchronized(this) {\r
+\r
+               setReady();\r
+//            p = procs;\r
+//            procs = null; \r
+        \r
+        }\r
+        \r
+//        if(p != null) {\r
+//             ArrayList<T> v = (ArrayList<T>)getResult();\r
+//             if(v != null) {\r
+//                 for(AsyncMultiProcedure<T> proc : p) {\r
+//                     for(T t : v) proc.execute(graph, t);\r
+//                 }\r
+//             }\r
+//             \r
+//             for(AsyncMultiProcedure<T>  proc : p) proc.finished(graph);\r
+//        }\r
+        \r
+    }\r
+\r
+    final synchronized public void except(AsyncReadGraph graph, Throwable t) {\r
+\r
+       assert(isPending());\r
+\r
+//        ArrayList<AsyncMultiProcedure<T>> p = null;\r
+\r
+        synchronized(this) {\r
+\r
+               except(t);\r
+//            p = procs;\r
+//            procs = null; \r
+        \r
+        }\r
+        \r
+//        if(p != null) {\r
+//             for(AsyncMultiProcedure<T>  proc : p) proc.exception(graph, t);\r
+//        }\r
+        \r
+    }\r
+\r
+    final synchronized public void addOrSet(Object item) {\r
+\r
+       assert(isPending());\r
+       \r
+        ArrayList<T> value = (ArrayList<T>)getResult(); \r
+        value.add((T)item);\r
+        \r
+    }\r
+    \r
+    @Override\r
+    public void clearResult(QuerySupport support) {\r
+       setResult(new ArrayList<T>());\r
+    }\r
+    \r
+    @Override\r
+    final public Query getQuery() {\r
+       \r
+        return new Query() {\r
+\r
+                       @Override\r
+                       public void recompute(ReadGraphImpl graph, Object provider, CacheEntry entry) {\r
+                               \r
+                               QueryProcessor qp = (QueryProcessor)provider;\r
+\r
+                               final ReadGraphImpl parentGraph = ReadGraphImpl.forRecompute(entry, qp); \r
+\r
+                               try {\r
+\r
+                                   request.perform(parentGraph , new AsyncMultiProcedure<T>() {\r
+\r
+                        @Override\r
+                        public void execute(AsyncReadGraph graph, T result) {\r
+                            addOrSet(result);\r
+                        }\r
+                        \r
+                        public void finished(AsyncReadGraph graph) {\r
+                               finish(graph);\r
+                        };\r
+                                       \r
+                                       @Override\r
+                                       public void exception(AsyncReadGraph graph, Throwable t) {\r
+                            except(t);\r
+                           }\r
+\r
+                    });\r
+\r
+                               } catch (Throwable t) {\r
+                    except(t);\r
+                    if(DebugException.DEBUG) new DebugException(t).printStackTrace();\r
+                }\r
+                               \r
+                       }\r
+\r
+                       @Override\r
+                       public void removeEntry(QueryProcessor processor) {\r
+                       processor.asyncMultiReadMap.remove(request);\r
+                       }\r
+\r
+                       @Override\r
+                       public int type() {\r
+                               return RequestFlags.INVALIDATE;\r
+                       }\r
+                       \r
+                       @Override\r
+                       public String toString() {\r
+                               if(request == null) return "DISCARDED";\r
+                               else return request.toString() + statusOrException;\r
+                       }\r
+               \r
+        };\r
+        \r
+    }\r
+\r
+       @Override\r
+       public void performFromCache(ReadGraphImpl graph, Object provider, Object procedure) {\r
+               \r
+               final AsyncMultiProcedure<T> proc = (AsyncMultiProcedure<T>)procedure;\r
+\r
+        if(isExcepted()) {\r
+\r
+            try {\r
+                proc.exception(graph, (Throwable)getResult());\r
+            } catch (Throwable t) {\r
+                t.printStackTrace();\r
+            }\r
+            \r
+            \r
+        } else {\r
+            \r
+            final ArrayList<T> values = (ArrayList<T>)getResult();\r
+            for(T value : values) {\r
+                try {\r
+                    proc.execute(graph, value);\r
+                } catch (Throwable t) {\r
+                    t.printStackTrace();\r
+                }\r
+            }\r
+\r
+            try {\r
+                proc.finished(graph);\r
+            } catch (Throwable t) {\r
+                t.printStackTrace();\r
+            }\r
+\r
+        }\r
+               \r
+               \r
+               \r
+       }\r
+\r
+//     @Override\r
+//     public void performFromCache(int callerThread, Object provider,\r
+//                     Object procedure) {\r
+//\r
+//         QueryProvider2 queryProvider = (QueryProvider2)provider;\r
+//         ReadGraphImpl graph = ReadGraphImpl.forFromCache(callerThread, null, new ReadGraphSupportImpl(null, queryProvider, null));\r
+//             performFromCache(graph, provider, procedure);\r
+//             \r
+//     }\r
+       \r
+       @Override\r
+       public String toString() {\r
+               if(request == null) return "DISCARDED";\r
+               else return request.toString() + statusOrException;\r
+       }\r
+\r
+}\r