/*******************************************************************************
- * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * 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
*******************************************************************************/
package org.simantics.db.impl.query;
+import java.util.Collection;
+
+import org.simantics.databoard.Bindings;
import org.simantics.db.AsyncReadGraph;
-import org.simantics.db.impl.DebugPolicy;
+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 {
-final public class AsyncReadEntry<T> extends CacheEntryBase {
+ private static final Logger LOGGER = LoggerFactory.getLogger(AsyncReadEntry.class);
- protected AsyncRead<T> request;
+ protected AsyncRead<T> id;
+ protected PendingTaskSupport pendingTaskSupport;
- public AsyncReadEntry(AsyncRead<T> request) {
- this.request = request;
- if(DebugPolicy.QUERY_STATE) System.out.println("[QUERY STATE]: created " + this);
+ 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 request.hashCode();
+ return id.hashCode();
}
-
+
@Override
public Object getOriginalRequest() {
- return request;
+ return id;
}
-
+
@Override
public void discard() {
- super.discard();
- //request = null;
- setResult(null);
+ super.discard();
+ setResult(null);
}
-
- final public void addOrSet(AsyncReadGraph graph, Object item) {
-
- assert(isPending());
-
-// ArrayList<AsyncProcedure<T>> p = null;
-
- synchronized(this) {
-
- setResult(item);
- setReady();
-// p = procs;
-// procs = null;
-
- }
-// if(p != null)
-// for(AsyncProcedure<T> proc : p) {
-// proc.execute(graph, (T)item);
-//// proc.first.execute(graph, (T)item);
-//// proc.second.dec();
-// }
-
- }
-
-
public void except(AsyncReadGraph graph, Throwable t) {
-
- assert(isPending());
-
-// ArrayList<AsyncProcedure<T>> p = null;
- synchronized(this) {
-
+ assert (isPending());
+
+ synchronized (this) {
except(t);
-//// p = procs;
-// procs = null;
-
}
-// if(p != null)
-// for(AsyncProcedure<T> proc : p) {
-// proc.exception(graph, t);
-// }
-
}
-
-
+
@Override
final public Query getQuery() {
-
- return new Query() {
- @Override
- public void recompute(ReadGraphImpl graph, Object provider, CacheEntry entry) {
-
- QueryProcessor qp = (QueryProcessor)provider;
+ return new Query() {
- final ReadGraphImpl parentGraph = ReadGraphImpl.forRecompute(entry, qp);
+ @Override
+ public void recompute(ReadGraphImpl graph) {
- try {
+ try {
- request.perform(parentGraph , new AsyncProcedure<T>() {
+ BlockingAsyncProcedure<T> proc = new BlockingAsyncProcedure(graph, AsyncReadEntry.this, new AsyncProcedure<T>() {
@Override
public void execute(AsyncReadGraph graph, T result) {
- addOrSet(graph, result);
+ setResult(result);
+ setReady();
}
-
- @Override
- public void exception(AsyncReadGraph graph, Throwable t) {
- except(t);
+
+ @Override
+ public void exception(AsyncReadGraph graph, Throwable t) {
+ except(t);
}
- });
+ }, id, true);
+
+ proc.performSync(id);
- } catch (Throwable t) {
- except(t);
+ } catch (Throwable t) {
+ except(t);
}
-
- }
- @Override
- public void removeEntry(QueryProcessor qp) {
- qp.asyncReadMap.remove(request);
- }
+ }
+
+ @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 int type() {
- return request.getFlags();
- }
-
- @Override
- public String toString() {
- if(request == null) return "DISCARDED";
- else if(isExcepted()) return request.toString() + " " + getResult();
- else return request.toString() + " " + statusOrException;
- }
-
};
-
+
}
- @SuppressWarnings("unchecked")
- public void performFromCache(ReadGraphImpl graph, Object provider, Object procedure) {
-
- AsyncProcedure<T> proc = (AsyncProcedure<T>)procedure;
+ @Override
+ public Object performFromCache(ReadGraphImpl graph, AsyncProcedure<T> proc) {
+
+ if (isExcepted()) {
- if(isExcepted()) {
-
try {
- proc.exception(graph, (Throwable)getResult());
+ proc.exception(graph, (Throwable) getResult());
} catch (Throwable t) {
- t.printStackTrace();
+ LOGGER.error("performFromCache proc.exception failed", t);
}
-
+
} else {
-
+
try {
- proc.execute(graph, (T)getResult());
+ T result = (T) getResult();
+ proc.execute(graph, result);
} catch (Throwable t) {
- t.printStackTrace();
+ 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 toString() {
- if(isDiscarded()) return "DISCARDED " + request.toString();
- else if(isExcepted()) return request.toString() + " " + getResult();
- else return request.toString() + " " + statusOrException;
- }
+ }
+
+ @Override
+ public String classId() {
+ return null;
+ }
}
Code Review / simantics / platform.git / blobdiff