-/*******************************************************************************\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.processor;\r
-\r
-import java.util.concurrent.ConcurrentLinkedQueue;\r
-\r
-import org.simantics.db.AsyncRequestProcessor;\r
-import org.simantics.db.VirtualGraph;\r
-import org.simantics.db.WriteOnlyGraph;\r
-import org.simantics.db.common.request.WriteOnlyRequest;\r
-import org.simantics.db.common.utils.Logger;\r
-import org.simantics.db.exception.DatabaseException;\r
-import org.simantics.db.request.WriteOnly;\r
-\r
-final public class MergingWriteOnlyProcessor extends ProcessorBase {\r
-\r
- final long transactionKeepalivePeriod;\r
- final ConcurrentLinkedQueue<WriteOnly> queue = new ConcurrentLinkedQueue<WriteOnly>(); \r
- final private AsyncRequestProcessor processor;\r
- final private VirtualGraph vg;\r
-\r
- boolean hasAlreadyRequest = false;\r
-\r
- public MergingWriteOnlyProcessor(AsyncRequestProcessor processor, VirtualGraph vg, long transactionKeepalivePeriod) {\r
- this.processor = processor;\r
- this.vg = vg;\r
- this.transactionKeepalivePeriod = transactionKeepalivePeriod;\r
- }\r
-\r
- class MergedWrite extends WriteOnlyRequest {\r
-\r
- public MergedWrite(VirtualGraph vg) {\r
- super(vg);\r
- }\r
- \r
- @Override\r
- public void perform(WriteOnlyGraph graph) throws DatabaseException {\r
-\r
-// System.out.println("MergedWrite begins");\r
-\r
- while (true) {\r
- \r
- WriteOnly next = queue.poll();\r
- if(next == null) {\r
- synchronized (MergingWriteOnlyProcessor.this) {\r
- if (transactionKeepalivePeriod > 0) {\r
- try {\r
- MergingWriteOnlyProcessor.this.wait(transactionKeepalivePeriod);\r
- } catch (InterruptedException e) {\r
- Logger.defaultLogError(e);\r
- }\r
- next = queue.poll();\r
- }\r
- if(next == null) {\r
- hasAlreadyRequest = false;\r
-// System.out.println("MergedWrite ends");\r
- return;\r
- }\r
- }\r
- }\r
-\r
-// System.out.println("MergedWrite executes " + next);\r
- try {\r
- next.perform(graph);\r
- } catch(Throwable t) {\r
- Logger.defaultLogError(t);\r
- }\r
-\r
- }\r
-\r
- }\r
-\r
- }\r
-\r
- @Override\r
- public void asyncRequest(WriteOnly request) {\r
- \r
- queue.add(request);\r
-\r
- synchronized (this) {\r
- \r
- if (!hasAlreadyRequest) {\r
- processor.asyncRequest(new MergedWrite(vg));\r
- hasAlreadyRequest = true;\r
- } else {\r
- notify();\r
- }\r
- \r
- }\r
-\r
- }\r
-\r
- @Override\r
- public String toString() {\r
- return "MergingWriteOnlyProcessor@" + System.identityHashCode(this) + " (based on " + processor + ")";\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.processor;
+
+import java.util.concurrent.ConcurrentLinkedQueue;
+
+import org.simantics.db.AsyncRequestProcessor;
+import org.simantics.db.VirtualGraph;
+import org.simantics.db.WriteOnlyGraph;
+import org.simantics.db.common.request.WriteOnlyRequest;
+import org.simantics.db.common.utils.Logger;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.request.WriteOnly;
+
+final public class MergingWriteOnlyProcessor extends ProcessorBase {
+
+ final long transactionKeepalivePeriod;
+ final ConcurrentLinkedQueue<WriteOnly> queue = new ConcurrentLinkedQueue<WriteOnly>();
+ final private AsyncRequestProcessor processor;
+ final private VirtualGraph vg;
+
+ boolean hasAlreadyRequest = false;
+
+ public MergingWriteOnlyProcessor(AsyncRequestProcessor processor, VirtualGraph vg, long transactionKeepalivePeriod) {
+ this.processor = processor;
+ this.vg = vg;
+ this.transactionKeepalivePeriod = transactionKeepalivePeriod;
+ }
+
+ class MergedWrite extends WriteOnlyRequest {
+
+ public MergedWrite(VirtualGraph vg) {
+ super(vg);
+ }
+
+ @Override
+ public void perform(WriteOnlyGraph graph) throws DatabaseException {
+
+// System.out.println("MergedWrite begins");
+
+ while (true) {
+
+ WriteOnly next = queue.poll();
+ if(next == null) {
+ synchronized (MergingWriteOnlyProcessor.this) {
+ if (transactionKeepalivePeriod > 0) {
+ try {
+ MergingWriteOnlyProcessor.this.wait(transactionKeepalivePeriod);
+ } catch (InterruptedException e) {
+ Logger.defaultLogError(e);
+ }
+ next = queue.poll();
+ }
+ if(next == null) {
+ hasAlreadyRequest = false;
+// System.out.println("MergedWrite ends");
+ return;
+ }
+ }
+ }
+
+// System.out.println("MergedWrite executes " + next);
+ try {
+ next.perform(graph);
+ } catch(Throwable t) {
+ Logger.defaultLogError(t);
+ }
+
+ }
+
+ }
+
+ }
+
+ @Override
+ public void asyncRequest(WriteOnly request) {
+
+ queue.add(request);
+
+ synchronized (this) {
+
+ if (!hasAlreadyRequest) {
+ processor.asyncRequest(new MergedWrite(vg));
+ hasAlreadyRequest = true;
+ } else {
+ notify();
+ }
+
+ }
+
+ }
+
+ @Override
+ public String toString() {
+ return "MergingWriteOnlyProcessor@" + System.identityHashCode(this) + " (based on " + processor + ")";
+ }
+
+}
Code Review / simantics / platform.git / blobdiff