-/*******************************************************************************\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 org.simantics.db.AsyncReadGraph;\r
-import org.simantics.db.exception.DatabaseException;\r
-import org.simantics.db.impl.graph.ReadGraphImpl;\r
-import org.simantics.db.impl.graph.WriteGraphImpl;\r
-import org.simantics.db.procedure.AsyncProcedure;\r
-import org.simantics.db.request.Read;\r
-import org.simantics.db.request.ReadExt;\r
-import org.simantics.db.request.RequestFlags;\r
-\r
-final public class ReadEntry<T> extends CacheEntryBase {\r
-\r
- protected Read<T> request;\r
-\r
- public ReadEntry(Read<T> request) {\r
- this.request = request;\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
- setResult(null);\r
- }\r
- \r
- final public void addOrSet(AsyncReadGraph graph, Object item) {\r
-\r
- assert(assertPending());\r
- \r
-// ArrayList<Pair<AsyncProcedure<T>, AsyncBarrier>> 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(Pair<AsyncProcedure<T>, AsyncBarrier> proc : p) {\r
-// proc.first.execute(graph, (T)item);\r
-// proc.second.dec();\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
- WriteGraphImpl write = qp.getCore().getSession().getService(WriteGraphImpl.class);\r
- \r
- ReadGraphImpl graph = write.newSync(entry);\r
-\r
- try {\r
-\r
- entry.setPending();\r
- T result = request.perform(graph);\r
- addOrSet(graph, result);\r
-\r
- } catch (Throwable t) {\r
-\r
- except(t);\r
- \r
- }\r
- \r
- }\r
-\r
- @Override\r
- public void removeEntry(QueryProcessor processor) {\r
- processor.readMap.remove(request);\r
- }\r
-\r
- @Override\r
- public int type() {\r
- if(request instanceof ReadExt) {\r
- return ((ReadExt)request).getType();\r
- } else {\r
- return RequestFlags.INVALIDATE;\r
- }\r
- }\r
- \r
- @Override\r
- public String toString() {\r
- if(request == null) return "DISCARDED";\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(request == null) return "DISCARDED";\r
- else return request.toString() + " - " + statusOrException;\r
- }\r
- \r
- public Object get(ReadGraphImpl graph, QueryProcessor processor, Object procedure) throws DatabaseException {\r
- if(procedure != null) performFromCache(graph, processor, procedure);\r
- checkAndThrow();\r
- return getResult();\r
- }\r
- \r
- @Override\r
- boolean isImmutable(ReadGraphImpl graph) throws DatabaseException {\r
- if(request instanceof ReadExt) {\r
- return ((ReadExt)request).isImmutable(graph);\r
- }\r
- return false;\r
- }\r
-\r
-}\r
+/*******************************************************************************
+ * Copyright (c) 2007, 2018 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.impl.query;
+
+import org.simantics.db.AsyncReadGraph;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.impl.graph.ReadGraphImpl;
+import org.simantics.db.procedure.AsyncProcedure;
+import org.simantics.db.request.Read;
+import org.simantics.db.request.ReadExt;
+import org.simantics.db.request.RequestFlags;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public final class ReadEntry<T> extends CacheEntryBase<AsyncProcedure<T>> implements AsyncProcedure<T> {
+
+ private static final Logger LOGGER = LoggerFactory.getLogger(ReadEntry.class);
+
+ protected Read<T> id;
+
+ public ReadEntry(Read<T> request) {
+ this.id = request;
+ }
+
+ @Override
+ int makeHash() {
+ return id.hashCode();
+ }
+
+ @Override
+ public Object getOriginalRequest() {
+ return id;
+ }
+
+ @Override
+ public void discard() {
+ super.discard();
+ setResult(null);
+ }
+
+ @Override
+ final public Query getQuery() {
+
+ return new Query() {
+
+ @Override
+ public void recompute(ReadGraphImpl graph) {
+
+ try {
+
+ T result = id.perform(graph);
+ setResult(result);
+ setReady();
+
+ } catch (Throwable t) {
+
+ except(t);
+
+ }
+
+ }
+
+ @Override
+ public void removeEntry(QueryProcessor processor) {
+ processor.cache.remove(ReadEntry.this);
+ }
+
+ @Override
+ public int type() {
+ if (id instanceof ReadExt) {
+ return ((ReadExt) id).getType();
+ } else {
+ return RequestFlags.INVALIDATE;
+ }
+ }
+
+ @Override
+ public String toString() {
+ if (id == null)
+ return "DISCARDED";
+ else
+ return id.toString() + statusOrException;
+ }
+
+ };
+
+ }
+
+ public static <T> T computeForEach(ReadGraphImpl graph, Read<T> request, ReadEntry<T> entry,
+ AsyncProcedure<T> procedure_, boolean needsToBlock) throws DatabaseException {
+
+ AsyncProcedure<T> procedure = entry != null ? entry : procedure_;
+
+ ReadGraphImpl queryGraph = graph.withParent(entry, null, needsToBlock);
+ queryGraph.asyncBarrier.inc();
+
+ ReadGraphImpl executeGraph = graph.withParent(graph.parent, null, needsToBlock);
+ executeGraph.asyncBarrier.inc();
+
+ try {
+
+ // This throws
+ T result = request.perform(queryGraph);
+
+ if(procedure != null) procedure.execute(executeGraph, result);
+ return (T)result;
+
+ } catch (DatabaseException e) {
+
+ if(procedure != null) procedure.exception(executeGraph, e);
+ throw e;
+
+ } catch (Throwable t) {
+
+ DatabaseException dbe = new DatabaseException(t);
+ if(procedure != null) procedure.exception(executeGraph, dbe);
+ throw dbe;
+
+ } finally {
+
+ queryGraph.asyncBarrier.dec();
+
+ try {
+
+ if (entry != null) {
+ // This also throws so must dec barrier finally
+ entry.performFromCache(executeGraph, procedure_);
+ }
+
+ } finally {
+
+ executeGraph.asyncBarrier.dec();
+ if(needsToBlock)
+ executeGraph.asyncBarrier.waitBarrier(procedure, executeGraph);
+
+ }
+
+
+ }
+
+ }
+
+ public Object performFromCache(ReadGraphImpl graph, AsyncProcedure<T> procedure) throws DatabaseException {
+
+ AsyncProcedure<T> proc = (AsyncProcedure<T>) procedure;
+
+ if (isExcepted()) {
+ if(proc != null) {
+ try {
+ proc.exception(graph, (Throwable) getResult());
+ } catch (Throwable t) {
+ LOGGER.error("performFromCache proc.exception failed", t);
+ }
+ }
+ Throwable t = (Throwable) getResult();
+ if(t instanceof DatabaseException) {
+ throw (DatabaseException)t;
+ } else {
+ throw new DatabaseException(t);
+ }
+ } else {
+ if(proc != null) {
+ try {
+ proc.execute(graph, (T) getResult());
+ } catch (Throwable t) {
+ LOGGER.error("performFromCache proc.execute failed", t);
+ }
+ }
+ return (T)getResult();
+ }
+
+ }
+
+ @Override
+ public String toString() {
+ if (id == null)
+ return "DISCARDED";
+ else
+ return id.toString() + " - " + statusOrException;
+ }
+
+ public Object get(ReadGraphImpl graph, AsyncProcedure<T> procedure) throws DatabaseException {
+ if (procedure != null)
+ performFromCache(graph, procedure);
+ checkAndThrow();
+ return getResult();
+ }
+
+ @Override
+ boolean isImmutable(ReadGraphImpl graph) throws DatabaseException {
+ if (id instanceof ReadExt) {
+ return ((ReadExt) id).isImmutable(graph);
+ }
+ return false;
+ }
+
+ @Override
+ public void execute(AsyncReadGraph graph, T result) {
+ setResult(result);
+ setReady();
+ }
+
+ @Override
+ public void exception(AsyncReadGraph graph, Throwable throwable) {
+ except(throwable);
+ }
+
+}
Code Review / simantics / platform.git / blobdiff