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.Collections;
   5 import java.util.Comparator;
   6 import java.util.HashSet;
   7 import java.util.List;
   8 import java.util.Set;
   9
  10 import org.simantics.db.AsyncReadGraph;
  11 import org.simantics.db.ReadGraph;
  12 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
  13 import org.simantics.db.common.request.AsyncReadRequest;
  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.db.procedure.AsyncProcedure;
  18 import org.simantics.document.server.JSONObject;
  19
  20 public class DocumentRequest extends VariableRead<List<JSONObject>> {
  21
  22         public static boolean PROFILE = false;
  23         // Thresholds in microseconds
  24         public static int PROFILE_THRESHOLD_NODEREQUEST = 2000;
  25         public static int PROFILE_THRESHOLD_VALUEREQUEST = 500;
  26
  27     public DocumentRequest(Variable var) {
  28         super(var);
  29         }
  30
  31         @Override
  32         public List<JSONObject> perform(ReadGraph graph) throws DatabaseException {
  33
  34                 long s = System.nanoTime();
  35
  36         Set<Variable> nodes = graph.syncRequest(new NodesRequest(variable), TransientCacheAsyncListener.<Set<Variable>>instance());
  37         HashSet<JSONObject> rs = new HashSet<JSONObject>(); // result
  38         if(nodes.isEmpty()) {
  39             return Collections.emptyList();
  40         }
  41
  42         if(PROFILE) {
  43             long dura = System.nanoTime()-s;
  44             System.err.println("DocumentRequest1 " + System.identityHashCode(this) + " in " + 1e-6*dura + "ms. " + variable.getURI(graph));
  45         }
  46
  47         graph.syncRequest(new AsyncReadRequest() {
  48
  49             @Override
  50             public void run(AsyncReadGraph graph) throws DatabaseException {
  51
  52                 for(Variable node : nodes) {
  53                     graph.asyncRequest(new NodeRequest(node), new AsyncProcedure<JSONObject> () {
  54
  55                         @Override
  56                         public void execute(AsyncReadGraph graph, JSONObject result) {
  57                             synchronized (rs) {
  58                                 rs.add(result);
  59                             }
  60                         }
  61
  62                         @Override
  63                         public void exception(AsyncReadGraph graph, Throwable throwable) {
  64                         }
  65
  66                     });
  67
  68                 }
  69
  70             }
  71
  72         });
  73
  74
  75         if(PROFILE) {
  76             long dura = System.nanoTime()-s;
  77             System.err.println("DocumentRequest2 " + System.identityHashCode(this) + " in " + 1e-6*dura + "ms. " + variable.getURI(graph));
  78         }
  79
  80                 ArrayList<JSONObject> result = new ArrayList<JSONObject>(rs);
  81                 Collections.sort(result, new Comparator<JSONObject>() {
  82
  83                         @Override
  84                         public int compare(JSONObject o1, JSONObject o2) {
  85                                 return o1.id.compareTo(o2.id);
  86                         }
  87
  88                 });
  89
  90         if(PROFILE) {
  91                 long dura = System.nanoTime()-s;
  92                 System.err.println("DocumentRequest3 " + System.identityHashCode(this) + " in " + 1e-6*dura + "ms. " + variable.getURI(graph));
  93         }
  94
  95                 return result;
  96
  97         }
  98 }