import org.simantics.db.AsyncReadGraph;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.impl.graph.ReadGraphImpl;
-import org.simantics.db.impl.graph.WriteGraphImpl;
import org.simantics.db.procedure.AsyncProcedure;
import org.simantics.db.request.Read;
import org.simantics.db.request.ReadExt;
import org.simantics.db.request.RequestFlags;
-final public class ReadEntry<T> extends CacheEntryBase {
+final public class ReadEntry<T> extends CacheEntryBase<AsyncProcedure<T>> implements AsyncProcedure<T> {
- protected Read<T> request;
+ protected Read<T> request;
- public ReadEntry(Read<T> request) {
- this.request = request;
+ public ReadEntry(Read<T> request) {
+ this.request = request;
}
-
+
@Override
int makeHash() {
- return request.hashCode();
+ return request.hashCode();
}
-
+
@Override
public Object getOriginalRequest() {
return request;
}
-
+
@Override
public void discard() {
- super.discard();
- setResult(null);
- }
-
- final public void addOrSet(AsyncReadGraph graph, Object item) {
-
- assert(assertPending());
-
-// ArrayList<Pair<AsyncProcedure<T>, AsyncBarrier>> p = null;
-
- synchronized(this) {
-
- setResult(item);
- setReady();
-// p = procs;
-// procs = null;
-
- }
-
-// if(p != null)
-// for(Pair<AsyncProcedure<T>, AsyncBarrier> proc : p) {
-// proc.first.execute(graph, (T)item);
-// proc.second.dec();
-// }
-
+ super.discard();
+ setResult(null);
}
@Override
final public Query getQuery() {
-
+
return new Query() {
- @Override
- public void recompute(ReadGraphImpl graph_, Object provider, CacheEntry entry) {
-
- QueryProcessor qp = (QueryProcessor)provider;
-
- WriteGraphImpl write = qp.getCore().getSession().getService(WriteGraphImpl.class);
-
- ReadGraphImpl graph = write.newSync(entry);
+ @Override
+ public void recompute(ReadGraphImpl graph) {
+
+ try {
- try {
+ T result = request.perform(graph);
+ setResult(result);
+ setReady();
- entry.setPending();
- T result = request.perform(graph);
- addOrSet(graph, result);
+ } catch (Throwable t) {
- } catch (Throwable t) {
+ except(t);
- except(t);
-
}
-
- }
-
- @Override
- public void removeEntry(QueryProcessor processor) {
- processor.cache.readMap.remove(request);
- }
-
- @Override
- public int type() {
- if(request instanceof ReadExt) {
- return ((ReadExt)request).getType();
- } else {
- return RequestFlags.INVALIDATE;
- }
- }
-
- @Override
- public String toString() {
- if(request == null) return "DISCARDED";
- else return request.toString() + statusOrException;
- }
-
+
+ }
+
+ @Override
+ public void removeEntry(QueryProcessor processor) {
+ processor.cache.remove(ReadEntry.this);
+ }
+
+ @Override
+ public int type() {
+ if (request instanceof ReadExt) {
+ return ((ReadExt) request).getType();
+ } else {
+ return RequestFlags.INVALIDATE;
+ }
+ }
+
+ @Override
+ public String toString() {
+ if (request == null)
+ return "DISCARDED";
+ else
+ return request.toString() + statusOrException;
+ }
+
};
-
+
+ }
+
+ public static <T> void computeForEach(ReadGraphImpl graph, Read<T> request, ReadEntry<T> entry,
+ AsyncProcedure<T> procedure_) throws DatabaseException {
+
+ AsyncProcedure<T> procedure = entry != null ? entry : procedure_;
+
+ ReadGraphImpl queryGraph = entry != null ? graph.withParent(entry) : graph;
+
+ try {
+
+ T result = request.perform(queryGraph);
+ procedure.execute(graph, result);
+
+ } catch (DatabaseException e) {
+
+ procedure.exception(graph, e);
+
+ } catch (Throwable t) {
+
+ DatabaseException dbe = new DatabaseException(t);
+ procedure.exception(graph, dbe);
+
+ }
+
+ if (entry != null)
+ entry.performFromCache(queryGraph, procedure_);
+
}
-
- public Object performFromCache(ReadGraphImpl graph, Object provider, Object procedure) {
-
- AsyncProcedure<T> proc = (AsyncProcedure<T>)procedure;
-
- if(proc != null) {
- if(isExcepted()) {
- try {
- proc.exception(graph, (Throwable)getResult());
- } catch (Throwable t) {
- t.printStackTrace();
- }
- } else {
- try {
- proc.execute(graph, (T)getResult());
- } catch (Throwable t) {
- t.printStackTrace();
- }
- }
+
+ public Object performFromCache(ReadGraphImpl graph, AsyncProcedure<T> procedure) {
+
+ AsyncProcedure<T> proc = (AsyncProcedure<T>) procedure;
+
+ if (proc != null) {
+ if (isExcepted()) {
+ try {
+ proc.exception(graph, (Throwable) getResult());
+ } catch (Throwable t) {
+ t.printStackTrace();
+ }
+ } else {
+ try {
+ proc.execute(graph, (T) getResult());
+ } catch (Throwable t) {
+ t.printStackTrace();
+ }
+ }
}
-
- return (T)getResult();
-
- }
-
- @Override
- public String toString() {
- if(request == null) return "DISCARDED";
- else return request.toString() + " - " + statusOrException;
- }
-
- public Object get(ReadGraphImpl graph, QueryProcessor processor, Object procedure) throws DatabaseException {
- if(procedure != null) performFromCache(graph, processor, procedure);
- checkAndThrow();
- return getResult();
- }
-
- @Override
- boolean isImmutable(ReadGraphImpl graph) throws DatabaseException {
- if(request instanceof ReadExt) {
- return ((ReadExt)request).isImmutable(graph);
- }
- return false;
- }
+
+ return (T) getResult();
+
+ }
+
+ @Override
+ public String toString() {
+ if (request == null)
+ return "DISCARDED";
+ else
+ return request.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 (request instanceof ReadExt) {
+ return ((ReadExt) request).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