--- /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.Collection;\r
+import java.util.concurrent.Semaphore;\r
+\r
+import org.simantics.db.common.exception.DebugException;\r
+import org.simantics.db.impl.graph.ReadGraphImpl;\r
+import org.simantics.db.procedure.ListenerBase;\r
+import org.simantics.db.request.RequestFlags;\r
+\r
+final public class DirectObjects extends CollectionBinaryQuery<IntProcedure> {\r
+\r
+ private DirectObjects(final int r1, final int r2) {\r
+ super(r1, r2);\r
+ }\r
+\r
+ @Override\r
+ public int type() {\r
+ return RequestFlags.INVALIDATE;\r
+ }\r
+ \r
+ @Override\r
+ public void clearResult(QuerySupport support) {\r
+ setResult(INVALID_RESULT);\r
+ }\r
+\r
+ final static DirectObjects entry(final QueryProcessor provider, final int r1, final int r2) {\r
+\r
+ return (DirectObjects)provider.directObjectsMap.get(id(r1,r2));\r
+\r
+ }\r
+ \r
+ final static Collection<DirectObjects> entries(final QueryProcessor processor, final int r1) {\r
+ DoubleKeyQueryHashMap<IntProcedure> hash = processor.directObjectsMap;\r
+ return hash.values(r1);\r
+ }\r
+\r
+ final static void runner(ReadGraphImpl graph, final int r1, final int r2, CacheEntry parent, final ListenerBase listener, final IntProcedure procedure) {\r
+\r
+ QueryProcessor processor = graph.processor;\r
+ \r
+ DirectObjects entry = (DirectObjects)processor.directObjectsMap.get(id(r1,r2));\r
+ if(entry == null) {\r
+ \r
+ entry = new DirectObjects(r1, r2);\r
+ entry.setPending();\r
+ entry.clearResult(processor.querySupport);\r
+ entry.putEntry(processor);\r
+ \r
+ processor.performForEach(graph, entry, parent, listener, procedure);\r
+ \r
+ } else {\r
+ \r
+ if(entry.isPending()) {\r
+ synchronized(entry) {\r
+ if(entry.isPending()) {\r
+ processor.registerDependencies(graph, entry, parent, listener, procedure, false);\r
+ entry.computeForEach(graph, processor, procedure, true);\r
+ return;\r
+ }\r
+ }\r
+ }\r
+ \r
+ processor.performForEach(graph, entry, parent, listener, procedure);\r
+ \r
+ }\r
+\r
+ }\r
+\r
+ final public static void queryEach(ReadGraphImpl graph, final int r1, final int r2, final QueryProcessor provider, final CacheEntry parent, final ListenerBase listener, final IntProcedure procedure) {\r
+\r
+ assert(r1 != 0);\r
+ assert(r2 != 0);\r
+ \r
+ if(parent == null && listener == null) {\r
+ DirectObjects.computeForEach(graph, r1, r2, null, procedure);\r
+ } else {\r
+ runner(graph, r1, r2, parent, listener, procedure);\r
+ }\r
+\r
+ }\r
+\r
+ @Override\r
+ public BinaryQuery<IntProcedure> getEntry(QueryProcessor provider) {\r
+ return provider.directObjectsMap.get(id);\r
+ }\r
+\r
+ @Override\r
+ public void putEntry(QueryProcessor provider) {\r
+ provider.directObjectsMap.put(id, this);\r
+ }\r
+\r
+ @Override\r
+ final public void removeEntry(QueryProcessor provider) {\r
+ provider.directObjectsMap.remove(id);\r
+ }\r
+\r
+ @Override\r
+ public void computeForEach(ReadGraphImpl graph, final QueryProcessor queryProvider, final IntProcedure procedure, final boolean store) {\r
+ computeForEach(graph, r1(), r2(), this, procedure);\r
+ }\r
+\r
+ static public void computeForEach(ReadGraphImpl graph, int r1, int r2, final DirectObjects entry, final IntProcedure procedure) {\r
+\r
+ QueryProcessor processor = graph.processor;\r
+ \r
+ processor.querySupport.ensureLoaded(graph, r1, r2);\r
+\r
+ processor.querySupport.getObjects(graph, r1, r2, new IntProcedure() {\r
+\r
+ @Override\r
+ public void execute(ReadGraphImpl graph, int i) {\r
+ procedure.execute(graph, i);\r
+ }\r
+\r
+ @Override\r
+ public void finished(ReadGraphImpl graph) {\r
+ }\r
+\r
+ @Override\r
+ public void exception(ReadGraphImpl graph, Throwable t) {\r
+ if(DebugException.DEBUG) new DebugException(t).printStackTrace();\r
+ }\r
+\r
+ });\r
+\r
+ if(entry != null) entry.finish(graph, processor);\r
+ procedure.finished(graph);\r
+\r
+ }\r
+\r
+ @Override\r
+ public String toString() {\r
+ return "DirectObjects[" + r1() + " - " + r2() + "]";\r
+ }\r
+\r
+ @Override\r
+ public void setReady() {\r
+ statusOrException = READY;\r
+ }\r
+ \r
+ final private void finish(ReadGraphImpl graph, QueryProcessor provider) {\r
+ setReady();\r
+ }\r
+\r
+ @Override\r
+ public void performFromCache(ReadGraphImpl graph, QueryProcessor provider, IntProcedure procedure) {\r
+\r
+ assert(isReady());\r
+ computeForEach(graph, provider, procedure, false);\r
+\r
+ }\r
+\r
+ @Override\r
+ public void recompute(ReadGraphImpl graph, QueryProcessor provider) {\r
+\r
+ final Semaphore s = new Semaphore(0);\r
+ \r
+ computeForEach(graph, provider, new IntProcedure() {\r
+\r
+ @Override\r
+ public void finished(ReadGraphImpl graph) {\r
+ s.release();\r
+ }\r
+\r
+ @Override\r
+ public void exception(ReadGraphImpl graph, Throwable t) {\r
+ throw new Error("Error in recompute.", t);\r
+ }\r
+\r
+ @Override\r
+ public void execute(ReadGraphImpl graphd, int i) {\r
+ }\r
+\r
+ }, true);\r
+\r
+ while(!s.tryAcquire()) {\r
+ provider.resume(graph);\r
+ }\r
+\r
+ }\r
+\r
+ @Override\r
+ boolean isImmutable(ReadGraphImpl graph) {\r
+ return graph.processor.isImmutable(r1());\r
+ }\r
+ \r
+}\r
+\r
Code Review / simantics / platform.git / blobdiff