*******************************************************************************/
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.DebugPolicy;
-import org.simantics.db.impl.graph.AsyncBarrierImpl;
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> {
+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> request;
+ protected AsyncRead<T> id;
+ protected PendingTaskSupport pendingTaskSupport;
AsyncReadEntry(AsyncRead<T> request) {
- this.request = request;
- if (DebugPolicy.QUERY_STATE)
- System.out.println("[QUERY STATE]: created " + this);
+ 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
try {
- BlockingAsyncProcedure<T> proc = new BlockingAsyncProcedure<>(graph.asyncBarrier, graph, new AsyncProcedure<T>() {
+ BlockingAsyncProcedure<T> proc = new BlockingAsyncProcedure(graph, AsyncReadEntry.this, new AsyncProcedure<T>() {
@Override
public void execute(AsyncReadGraph graph, T result) {
except(t);
}
- }, request);
-
- request.perform(graph, proc);
-
- proc.get();
+ }, id, true);
+
+ proc.performSync(id);
} catch (Throwable t) {
except(t);
@Override
public int type() {
- return request.getFlags();
+ return id.getFlags();
}
@Override
public String toString() {
- if (request == null)
+ if (id == null)
return "DISCARDED";
else if (isExcepted())
- return request.toString() + " " + getResult();
+ return id.toString() + " " + getResult();
else
- return request.toString() + " " + statusOrException;
+ return id.toString() + " " + statusOrException;
}
};
}
- public static <T> T computeForEach(ReadGraphImpl graph, AsyncRead<T> request, AsyncReadEntry<T> entry,
+ public static <T> T computeForEach(ReadGraphImpl callerGraph, AsyncRead<T> request, AsyncReadEntry<T> entry,
AsyncProcedure<T> procedure_, boolean needsToBlock) throws DatabaseException {
- AsyncProcedure<T> procedure = entry != null ? entry : procedure_;
-
- ReadGraphImpl queryGraph = graph.withParent(entry);
-
- BlockingAsyncProcedure<T> proc = new BlockingAsyncProcedure<>(queryGraph.asyncBarrier, graph, null, request);
-
- class AsyncTask extends SessionTask {
-
- int counter = 0;
- T result;
- DatabaseException exception;
-
- public AsyncTask(ReadGraphImpl graph) {
- super(graph);
- }
-
- @Override
- public void run(int thread) {
- if(needsToBlock) proc.waitBarrier();
- if(proc.isDone()) {
- try {
- result = (T)proc.get();
- if(procedure != null) procedure.execute(graph, result);
- } catch (DatabaseException e) {
- if(procedure != null) procedure.exception(graph, e);
- exception = e;
- } catch (Throwable t) {
- DatabaseException dbe = new DatabaseException(t);
- if(procedure != null) procedure.exception(graph, dbe);
- exception = dbe;
- } finally {
- if (entry != null)
- entry.performFromCache(graph, procedure_);
- }
- } else {
- if(counter++ > 10000) {
- AsyncBarrierImpl.printReverse(queryGraph.asyncBarrier, 2);
- AsyncBarrierImpl caller = queryGraph.asyncBarrier.caller;
- while(caller != null) {
- System.err.println("called by " + AsyncBarrierImpl.report(caller));
- caller = caller.caller;
- }
- for(AsyncBarrierImpl ab : AsyncBarrierImpl.debuggerMap.keySet()) {
- AsyncBarrierImpl.printReverse(ab, 2);
- }
- throw new IllegalStateException("Eternal loop in queries.");
- }
- graph.processor.schedule(this);
- }
- }
-
- }
-
- request.perform(queryGraph, proc);
-
- AsyncTask task = new AsyncTask(graph);
-
- if(needsToBlock) task.run(0);
- else if (proc.isDone()) task.run(0);
- else {
- graph.processor.schedule(task);
+ BlockingAsyncProcedure<T> proc = new BlockingAsyncProcedure(callerGraph, entry, procedure_, request, needsToBlock);
+ if(needsToBlock) {
+ return proc.performSync(request);
+ } else {
+ proc.performAsync(request);
return null;
}
-
- if(task.exception != null) throw task.exception;
- else return task.result;
}
@Override
public String toString() {
if (isDiscarded())
- return "DISCARDED " + request.toString();
+ return "DISCARDED " + id.toString();
else if (isExcepted())
- return request.toString() + " " + getResult();
+ return id.toString() + " " + getResult();
else
- return request.toString() + " " + statusOrException;
+ return id.toString() + " " + statusOrException;
}
@Override
public void execute(AsyncReadGraph graph, T result) {
- setResult(result);
- setReady();
+ 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 void exception(AsyncReadGraph graph, Throwable throwable) {
- except(throwable);
+ public String classId() {
+ return null;
}
}
Code Review / simantics / platform.git / blobdiff