-/*******************************************************************************\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.ArrayList;\r
-\r
-import org.simantics.db.AsyncReadGraph;\r
-import org.simantics.db.impl.DebugPolicy;\r
-import org.simantics.db.impl.graph.ReadGraphImpl;\r
-import org.simantics.db.procedure.AsyncProcedure;\r
-import org.simantics.db.request.AsyncRead;\r
-\r
-final public class AsyncReadEntry<T> extends CacheEntryBase {\r
-\r
- protected AsyncRead<T> request;\r
-\r
- public AsyncReadEntry(AsyncRead<T> request) {\r
- this.request = request;\r
- if(DebugPolicy.QUERY_STATE) System.out.println("[QUERY STATE]: created " + this);\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
- //request = null;\r
- setResult(null);\r
- }\r
- \r
- final public void addOrSet(AsyncReadGraph graph, Object item) {\r
-\r
- assert(isPending());\r
- \r
-// ArrayList<AsyncProcedure<T>> 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(AsyncProcedure<T> proc : p) {\r
-// proc.execute(graph, (T)item);\r
-//// proc.first.execute(graph, (T)item);\r
-//// proc.second.dec();\r
-// }\r
- \r
- }\r
- \r
- \r
- public void except(AsyncReadGraph graph, Throwable t) {\r
- \r
- assert(isPending());\r
- \r
-// ArrayList<AsyncProcedure<T>> p = null;\r
-\r
- synchronized(this) {\r
- \r
- except(t);\r
-//// p = procs;\r
-// procs = null;\r
- \r
- }\r
-\r
-// if(p != null)\r
-// for(AsyncProcedure<T> proc : p) {\r
-// proc.exception(graph, t);\r
-// }\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
- final ReadGraphImpl parentGraph = ReadGraphImpl.forRecompute(entry, qp); \r
-\r
- try {\r
-\r
- request.perform(parentGraph , new AsyncProcedure<T>() {\r
-\r
- @Override\r
- public void execute(AsyncReadGraph graph, T result) {\r
- addOrSet(graph, result);\r
- }\r
- \r
- @Override\r
- public void exception(AsyncReadGraph graph, Throwable t) {\r
- except(t);\r
- }\r
-\r
- });\r
-\r
- } catch (Throwable t) {\r
- except(t);\r
- }\r
- \r
- }\r
-\r
- @Override\r
- public void removeEntry(QueryProcessor qp) {\r
- qp.asyncReadMap.remove(request);\r
- }\r
-\r
- @Override\r
- public int type() {\r
- return request.getFlags();\r
- }\r
- \r
- @Override\r
- public String toString() {\r
- if(request == null) return "DISCARDED";\r
- else if(isExcepted()) return request.toString() + " " + getResult();\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(isDiscarded()) return "DISCARDED " + request.toString();\r
- else if(isExcepted()) return request.toString() + " " + getResult();\r
- else return request.toString() + " " + statusOrException;\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 java.util.Collection;
+
+import org.simantics.databoard.Bindings;
+import org.simantics.db.AsyncReadGraph;
+import org.simantics.db.DevelopmentKeys;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.impl.BlockingAsyncProcedure;
+import org.simantics.db.impl.graph.ReadGraphImpl;
+import org.simantics.db.impl.query.QueryProcessor.SessionTask;
+import org.simantics.db.procedure.AsyncProcedure;
+import org.simantics.db.request.AsyncRead;
+import org.simantics.utils.Development;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+final public class AsyncReadEntry<T> extends CacheEntryBase<AsyncProcedure<T>> implements AsyncProcedure<T>, IPending {
+
+ private static final Logger LOGGER = LoggerFactory.getLogger(AsyncReadEntry.class);
+
+ protected AsyncRead<T> id;
+ protected PendingTaskSupport pendingTaskSupport;
+
+ AsyncReadEntry(AsyncRead<T> request) {
+ this.id = request;
+ if (Development.DEVELOPMENT) {
+ if(Development.<Boolean>getProperty(DevelopmentKeys.CACHE_ENTRY_STATE, Bindings.BOOLEAN)) {
+ System.err.println("[QUERY STATE]: created " + this);
+ }
+ }
+ }
+
+ @Override
+ int makeHash() {
+ return id.hashCode();
+ }
+
+ @Override
+ public Object getOriginalRequest() {
+ return id;
+ }
+
+ @Override
+ public void discard() {
+ super.discard();
+ setResult(null);
+ }
+
+ public void except(AsyncReadGraph graph, Throwable t) {
+
+ assert (isPending());
+
+ synchronized (this) {
+ except(t);
+ }
+
+ }
+
+ @Override
+ final public Query getQuery() {
+
+ return new Query() {
+
+ @Override
+ public void recompute(ReadGraphImpl graph) {
+
+ try {
+
+ BlockingAsyncProcedure<T> proc = new BlockingAsyncProcedure(graph, AsyncReadEntry.this, new AsyncProcedure<T>() {
+
+ @Override
+ public void execute(AsyncReadGraph graph, T result) {
+ setResult(result);
+ setReady();
+ }
+
+ @Override
+ public void exception(AsyncReadGraph graph, Throwable t) {
+ except(t);
+ }
+
+ }, id, true);
+
+ proc.performSync(id);
+
+ } catch (Throwable t) {
+ except(t);
+ }
+
+ }
+
+ @Override
+ public void removeEntry(QueryProcessor qp) {
+ qp.cache.remove(AsyncReadEntry.this);
+ }
+
+ @Override
+ public int type() {
+ return id.getFlags();
+ }
+
+ @Override
+ public String toString() {
+ if (id == null)
+ return "DISCARDED";
+ else if (isExcepted())
+ return id.toString() + " " + getResult();
+ else
+ return id.toString() + " " + statusOrException;
+ }
+
+ };
+
+ }
+
+ @Override
+ public Object performFromCache(ReadGraphImpl graph, AsyncProcedure<T> proc) {
+
+ if (isExcepted()) {
+
+ try {
+ proc.exception(graph, (Throwable) getResult());
+ } catch (Throwable t) {
+ LOGGER.error("performFromCache proc.exception failed", t);
+ }
+
+ } else {
+
+ try {
+ T result = (T) getResult();
+ proc.execute(graph, result);
+ } catch (Throwable t) {
+ LOGGER.error("performFromCache proc.execute failed", t);
+ }
+
+ }
+
+ return getResult();
+
+ }
+
+ public static <T> T computeForEach(ReadGraphImpl callerGraph, AsyncRead<T> request, AsyncReadEntry<T> entry,
+ AsyncProcedure<T> procedure_, boolean needsToBlock) throws DatabaseException {
+
+ BlockingAsyncProcedure<T> proc = new BlockingAsyncProcedure(callerGraph, entry, procedure_, request, needsToBlock);
+ if(needsToBlock) {
+ return proc.performSync(request);
+ } else {
+ proc.performAsync(request);
+ return null;
+ }
+
+ }
+
+ @Override
+ public String toString() {
+ if (isDiscarded())
+ return "DISCARDED " + id.toString();
+ else if (isExcepted())
+ return id.toString() + " " + getResult();
+ else
+ return id.toString() + " " + statusOrException;
+ }
+
+ @Override
+ public void execute(AsyncReadGraph graph, T result) {
+ Collection<SessionTask> tasks = null;
+ synchronized(this) {
+ setResult(result);
+ setReady();
+ if(pendingTaskSupport != null)
+ tasks = pendingTaskSupport.executePending();
+ }
+ if(tasks != null)
+ for(SessionTask task : tasks)
+ ((ReadGraphImpl)graph).processor.scheduleNow(task);
+ }
+
+ @Override
+ public synchronized void exception(AsyncReadGraph graph, Throwable throwable) {
+ Collection<SessionTask> tasks = null;
+ synchronized(this) {
+ except(throwable);
+ if(pendingTaskSupport != null)
+ tasks = pendingTaskSupport.executePending();
+ }
+ if(tasks != null)
+ for(SessionTask task : tasks)
+ ((ReadGraphImpl)graph).processor.scheduleNow(task);
+ }
+
+ public void executeWhenResultIsAvailable(QueryProcessor processor, SessionTask task) {
+ boolean ready = false;
+ synchronized(this) {
+ if(pendingTaskSupport == null)
+ pendingTaskSupport = new PendingTaskSupport(this);
+ ready = pendingTaskSupport.executeWhenResultIsAvailable(task);
+ }
+ if(ready) {
+ processor.scheduleNow(task);
+ }
+ }
+
+ @Override
+ public String classId() {
+ return null;
+ }
+
+}
Code Review / simantics / platform.git / blobdiff