-/*******************************************************************************\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.common.procedure.single.wrapper;\r
-\r
-import java.util.concurrent.atomic.AtomicBoolean;\r
-import java.util.concurrent.atomic.AtomicInteger;\r
-\r
-import org.simantics.db.AsyncReadGraph;\r
-import org.simantics.db.common.utils.Logger;\r
-import org.simantics.db.exception.NoSingleResultException;\r
-import org.simantics.db.procedure.AsyncProcedure;\r
-\r
-final public class DeepSingleOrErrorProcedure<Result> {\r
- \r
- private Result result = null;\r
- final AsyncProcedure<Result> procedure;\r
- final AtomicBoolean done = new AtomicBoolean(false);\r
- final AtomicBoolean found = new AtomicBoolean(false);\r
- final AtomicInteger ready = new AtomicInteger(1);\r
- \r
- public DeepSingleOrErrorProcedure(AsyncProcedure<Result> procedure) {\r
- \r
- this.procedure = procedure;\r
- \r
- }\r
- \r
- public void inc() {\r
- \r
- ready.incrementAndGet();\r
- \r
- }\r
- \r
- public void dec(AsyncReadGraph graph) {\r
-\r
- if(ready.decrementAndGet() == 0) {\r
- // Shall fire exactly once!\r
- if(done.compareAndSet(false, true)) {\r
- try {\r
- if(found.compareAndSet(false, true)) {\r
- procedure.exception(graph, new NoSingleResultException("No results."));\r
- } else {\r
- procedure.execute(graph, result);\r
- }\r
- } catch (Throwable t) {\r
- Logger.defaultLogError(t);\r
- }\r
- }\r
- }\r
- \r
- }\r
-\r
- public void offer(AsyncReadGraph graph, Result result) {\r
- \r
- if(found.compareAndSet(false, true)) {\r
- this.result = result;\r
- } else {\r
- // Shall fire exactly once!\r
- if(done.compareAndSet(false, true)) {\r
- try {\r
- procedure.exception(graph, new NoSingleResultException(this.result + " and " + result));\r
- } catch (Throwable t) {\r
- Logger.defaultLogError(t);\r
- }\r
- }\r
- }\r
- \r
- }\r
- \r
- public void exception(AsyncReadGraph graph, Throwable t) {\r
- // Shall fire exactly once!\r
- if(done.compareAndSet(false, true)) {\r
- try {\r
- procedure.exception(graph, t);\r
- } catch (Throwable t2) {\r
- Logger.defaultLogError(t2);\r
- }\r
- }\r
- }\r
- \r
-}\r
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.db.common.procedure.single.wrapper;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.simantics.db.AsyncReadGraph;
+import org.simantics.db.common.utils.Logger;
+import org.simantics.db.exception.NoSingleResultException;
+import org.simantics.db.procedure.AsyncProcedure;
+
+final public class DeepSingleOrErrorProcedure<Result> {
+
+ private Result result = null;
+ final AsyncProcedure<Result> procedure;
+ final AtomicBoolean done = new AtomicBoolean(false);
+ final AtomicBoolean found = new AtomicBoolean(false);
+ final AtomicInteger ready = new AtomicInteger(1);
+
+ public DeepSingleOrErrorProcedure(AsyncProcedure<Result> procedure) {
+
+ this.procedure = procedure;
+
+ }
+
+ public void inc() {
+
+ ready.incrementAndGet();
+
+ }
+
+ public void dec(AsyncReadGraph graph) {
+
+ if(ready.decrementAndGet() == 0) {
+ // Shall fire exactly once!
+ if(done.compareAndSet(false, true)) {
+ try {
+ if(found.compareAndSet(false, true)) {
+ procedure.exception(graph, new NoSingleResultException("No results."));
+ } else {
+ procedure.execute(graph, result);
+ }
+ } catch (Throwable t) {
+ Logger.defaultLogError(t);
+ }
+ }
+ }
+
+ }
+
+ public void offer(AsyncReadGraph graph, Result result) {
+
+ if(found.compareAndSet(false, true)) {
+ this.result = result;
+ } else {
+ // Shall fire exactly once!
+ if(done.compareAndSet(false, true)) {
+ try {
+ procedure.exception(graph, new NoSingleResultException(this.result + " and " + result));
+ } catch (Throwable t) {
+ Logger.defaultLogError(t);
+ }
+ }
+ }
+
+ }
+
+ public void exception(AsyncReadGraph graph, Throwable t) {
+ // Shall fire exactly once!
+ if(done.compareAndSet(false, true)) {
+ try {
+ procedure.exception(graph, t);
+ } catch (Throwable t2) {
+ Logger.defaultLogError(t2);
+ }
+ }
+ }
+
+}