--- /dev/null
+/*******************************************************************************\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.impl.DebugPolicy;\r
+import org.simantics.db.impl.graph.ReadGraphImpl;\r
+import org.simantics.db.procedure.AsyncProcedure;\r
+import org.simantics.db.request.AsyncRead;\r
+\r
+final public class AsyncReadEntry<T> extends CacheEntryBase {\r
+\r
+ protected AsyncRead<T> request;\r
+\r
+ public AsyncReadEntry(AsyncRead<T> request) {\r
+ this.request = request;\r
+ if(DebugPolicy.QUERY_STATE) System.out.println("[QUERY STATE]: created " + this);\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 public void addOrSet(AsyncReadGraph graph, Object item) {\r
+\r
+ assert(isPending());\r
+ \r
+// ArrayList<AsyncProcedure<T>> p = null;\r
+\r
+ synchronized(this) {\r
+ \r
+ setResult(item);\r
+ setReady();\r
+// p = procs;\r
+// procs = null;\r
+ \r
+ }\r
+\r
+// if(p != null)\r
+// for(AsyncProcedure<T> proc : p) {\r
+// proc.execute(graph, (T)item);\r
+//// proc.first.execute(graph, (T)item);\r
+//// proc.second.dec();\r
+// }\r
+ \r
+ }\r
+ \r
+ \r
+ public void except(AsyncReadGraph graph, Throwable t) {\r
+ \r
+ assert(isPending());\r
+ \r
+// ArrayList<AsyncProcedure<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(AsyncProcedure<T> proc : p) {\r
+// proc.exception(graph, t);\r
+// }\r
+ \r
+ }\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 AsyncProcedure<T>() {\r
+\r
+ @Override\r
+ public void execute(AsyncReadGraph graph, T result) {\r
+ addOrSet(graph, result);\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
+ }\r
+ \r
+ }\r
+\r
+ @Override\r
+ public void removeEntry(QueryProcessor qp) {\r
+ qp.asyncReadMap.remove(request);\r
+ }\r
+\r
+ @Override\r
+ public int type() {\r
+ return request.getFlags();\r
+ }\r
+ \r
+ @Override\r
+ public String toString() {\r
+ if(request == null) return "DISCARDED";\r
+ else if(isExcepted()) return request.toString() + " " + getResult();\r
+ else return request.toString() + " " + statusOrException;\r
+ }\r
+ \r
+ };\r
+ \r
+ }\r
+\r
+ public void performFromCache(ReadGraphImpl graph, Object provider, Object procedure) {\r
+ \r
+ AsyncProcedure<T> proc = (AsyncProcedure<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
+ } else {\r
+ \r
+ try {\r
+ proc.execute(graph, (T)getResult());\r
+ } catch (Throwable t) {\r
+ t.printStackTrace();\r
+ }\r
+ \r
+ }\r
+ \r
+ }\r
+\r
+ @Override\r
+ public String toString() {\r
+ if(isDiscarded()) return "DISCARDED " + request.toString();\r
+ else if(isExcepted()) return request.toString() + " " + getResult();\r
+ else return request.toString() + " " + statusOrException;\r
+ }\r
+\r
+}\r