bundles/org.simantics.document.server/src/org/simantics/document/server/request/DocumentRequest.java

   1 package org.simantics.document.server.request;
   2
   3 import java.util.ArrayList;
   4 import java.util.Collection;
   5 import java.util.Collections;
   6 import java.util.Comparator;
   7 import java.util.HashSet;
   8 import java.util.List;
   9 import java.util.Set;
  10
  11 import org.simantics.db.ReadGraph;
  12 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
  13 import org.simantics.db.common.request.UnaryRead;
  14 import org.simantics.db.exception.DatabaseException;
  15 import org.simantics.db.layer0.request.VariableRead;
  16 import org.simantics.db.layer0.variable.Variable;
  17 import org.simantics.document.server.JSONObject;
  18
  19 public class DocumentRequest extends VariableRead<List<JSONObject>> {
  20
  21     public static boolean PROFILE = false;
  22     // Thresholds in microseconds
  23     public static int PROFILE_THRESHOLD_NODEREQUEST = 2000;
  24     public static int PROFILE_THRESHOLD_VALUEREQUEST = 500;
  25
  26     public DocumentRequest(Variable var) {
  27         super(var);
  28     }
  29
  30     static class CollectNodesRequest extends UnaryRead<Collection<Variable>, Collection<JSONObject>> {
  31
  32         public CollectNodesRequest(Collection<Variable> nodes) {
  33             super(nodes);
  34         }
  35
  36         @Override
  37         public Collection<JSONObject> perform(ReadGraph graph) throws DatabaseException {
  38             HashSet<JSONObject> rs = new HashSet<>(); // result
  39             for(Variable node : parameter) {
  40                 rs.add(graph.syncRequest(new NodeRequest(node)));
  41             }
  42             return rs;
  43         }
  44
  45     }
  46
  47     private static final Comparator<JSONObject> JSON_COMPARATOR = (o1, o2) -> o1.id.compareTo(o2.id);
  48
  49     @Override
  50     public List<JSONObject> perform(ReadGraph graph) throws DatabaseException {
  51
  52         long s = System.nanoTime();
  53
  54         Set<Variable> nodes = graph.syncRequest(new NodesRequest(variable), TransientCacheAsyncListener.<Set<Variable>>instance());
  55         if(nodes.isEmpty()) {
  56             return Collections.emptyList();
  57         }
  58
  59         Collection<JSONObject> rs = graph.syncRequest(new CollectNodesRequest(nodes));
  60
  61         ArrayList<JSONObject> result = new ArrayList<>(rs);
  62         Collections.sort(result, JSON_COMPARATOR);
  63
  64         if(PROFILE) {
  65             long dura = System.nanoTime()-s;
  66             System.err.println("DocumentRequest " + System.identityHashCode(this) + " in " + 1e-6*dura + "ms. " + variable.getURI(graph));
  67         }
  68
  69         return result;
  70
  71     }
  72
  73 }