Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.impl / src / org / simantics / db / impl / procedure / ResultCallWrappedSingleQueryProcedure45.java

diff --git a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/procedure/ResultCallWrappedSingleQueryProcedure45.java b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/procedure/ResultCallWrappedSingleQueryProcedure45.java
new file mode 100644 (file)
index 0000000..d5abda6
--- /dev/null
+++ b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/procedure/ResultCallWrappedSingleQueryProcedure45.java
@@ -0,0 +1,78 @@
+/*******************************************************************************\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.procedure;\r
+\r
+import java.util.concurrent.atomic.AtomicBoolean;\r
+\r
+import org.simantics.db.AsyncReadGraph;\r
+import org.simantics.db.common.utils.Logger;\r
+import org.simantics.db.impl.query.QueryProcessor.AsyncBarrier;\r
+import org.simantics.db.procedure.AsyncProcedure;\r
+import org.simantics.db.procedure.Procedure;\r
+\r
+public class ResultCallWrappedSingleQueryProcedure45<Result> implements AsyncProcedure<Result> {\r
+\r
+    private Result result = null;\r
+    private Throwable exception = null;\r
+    final private Procedure<Result> procedure;\r
+    final private AsyncBarrier barrier;\r
+    final private AtomicBoolean latch;\r
+    \r
+    public ResultCallWrappedSingleQueryProcedure45(Procedure<Result> procedure, AsyncBarrier barrier) {\r
+       assert(procedure != null);\r
+        this.procedure = procedure;\r
+        this.barrier = barrier;\r
+        latch = new AtomicBoolean(false);\r
+    }\r
+    \r
+    @Override\r
+    public void execute(AsyncReadGraph graph, Result result) {\r
+        this.result = result;\r
+        if(latch.compareAndSet(false, true)) {\r
+               try {\r
+                       procedure.execute(result);\r
+               } catch (Throwable throwable) {\r
+               Logger.defaultLogError("AsyncProcedure.execute threw for " + procedure, throwable);\r
+               } finally {\r
+                       barrier.dec();\r
+               }\r
+        } else {\r
+               Logger.defaultLogError("Procedure was called many times (this time is execute)");\r
+        }\r
+    }\r
+\r
+    @Override\r
+    public void exception(AsyncReadGraph graph, Throwable t) {\r
+        this.exception = t;\r
+        if(latch.compareAndSet(false, true)) {\r
+               try {\r
+                       procedure.exception(t);\r
+               } catch (Throwable throwable) {\r
+               Logger.defaultLogError("AsyncProcedure.exception threw for " + procedure, throwable);\r
+               } finally {\r
+                       barrier.dec();\r
+               }\r
+        } else {\r
+               Logger.defaultLogError("Procedure was called many times (this time is exception)");\r
+        }\r
+        \r
+    }\r
+    \r
+    public Result getResult() {\r
+        return result;\r
+    }\r
+    \r
+    public Throwable getException() {\r
+        return exception;\r
+    }\r
+       \r
+}\r