Fixed multiple issues causing dangling references to discarded queries
[simantics/platform.git] / bundles / org.simantics.document.server / src / org / simantics / document / server / request / DocumentRequest.java
index 8acc2f0d192899316c870cfba8ce27366b93d699..5b76cd344043f10dd05428642bee688c418ed12f 100644 (file)
@@ -1,6 +1,7 @@
 package org.simantics.document.server.request;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.HashSet;
@@ -10,7 +11,7 @@ import java.util.Set;
 import org.simantics.db.AsyncReadGraph;
 import org.simantics.db.ReadGraph;
 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
-import org.simantics.db.common.request.AsyncReadRequest;
+import org.simantics.db.common.request.UnaryAsyncRead;
 import org.simantics.db.exception.DatabaseException;
 import org.simantics.db.layer0.request.VariableRead;
 import org.simantics.db.layer0.variable.Variable;
@@ -28,49 +29,55 @@ public class DocumentRequest extends VariableRead<List<JSONObject>> {
         super(var);
        }
 
-       @Override
-       public List<JSONObject> perform(ReadGraph graph) throws DatabaseException {
-               
-               long s = System.nanoTime();
-               
-        Set<Variable> nodes = graph.syncRequest(new NodesRequest(variable), TransientCacheAsyncListener.<Set<Variable>>instance());
-        HashSet<JSONObject> rs = new HashSet<JSONObject>(); // result
-        if(nodes.isEmpty()) {
-            return Collections.emptyList();
-        }
+    static class CollectNodesRequest extends UnaryAsyncRead<Collection<Variable>, Collection<JSONObject>> {
 
-        if(PROFILE) {
-            long dura = System.nanoTime()-s;
-            System.err.println("DocumentRequest1 " + System.identityHashCode(this) + " in " + 1e-6*dura + "ms. " + variable.getURI(graph));
+        public CollectNodesRequest(Collection<Variable> nodes) {
+            super(nodes);
         }
 
-        graph.syncRequest(new AsyncReadRequest() {
+        @Override
+        public void perform(AsyncReadGraph graph, AsyncProcedure<Collection<JSONObject>> procedure) {
+            HashSet<JSONObject> rs = new HashSet<JSONObject>(); // result
 
-            @Override
-            public void run(AsyncReadGraph graph) throws DatabaseException {
+            for(Variable node : parameter) {
+                graph.asyncRequest(new NodeRequest(node), new AsyncProcedure<JSONObject> () {
 
-                for(Variable node : nodes) {
-                    graph.asyncRequest(new NodeRequest(node), new AsyncProcedure<JSONObject> () {
-
-                        @Override
-                        public void execute(AsyncReadGraph graph, JSONObject result) {
-                            synchronized (rs) {
-                                rs.add(result);
-                            }
+                    @Override
+                    public void execute(AsyncReadGraph graph, JSONObject result) {
+                        synchronized(rs) {
+                            rs.add(result);
                         }
+                    }
 
-                        @Override
-                        public void exception(AsyncReadGraph graph, Throwable throwable) {
-                        }
+                    @Override
+                    public void exception(AsyncReadGraph graph, Throwable throwable) {
+                    }
+
+                });
 
-                    });
-                    
-                }
-                
             }
-            
-        });
+            procedure.execute(graph, rs);
+
+        }
+
+    }
+
+    @Override
+    public List<JSONObject> perform(ReadGraph graph) throws DatabaseException {
+
+        long s = System.nanoTime();
+
+        Set<Variable> nodes = graph.syncRequest(new NodesRequest(variable), TransientCacheAsyncListener.<Set<Variable>>instance());
+        if(nodes.isEmpty()) {
+            return Collections.emptyList();
+        }
+
+        if(PROFILE) {
+            long dura = System.nanoTime()-s;
+            System.err.println("DocumentRequest1 " + System.identityHashCode(this) + " in " + 1e-6*dura + "ms. " + variable.getURI(graph));
+        }
 
+        Collection<JSONObject> rs = graph.syncRequest(new CollectNodesRequest(nodes));
 
         if(PROFILE) {
             long dura = System.nanoTime()-s;