1 package org.simantics.event.util;
3 import java.util.ArrayList;
4 import java.util.Collections;
7 import org.simantics.databoard.Bindings;
8 import org.simantics.db.ReadGraph;
9 import org.simantics.db.Resource;
10 import org.simantics.db.VirtualGraph;
11 import org.simantics.db.WriteOnlyGraph;
12 import org.simantics.db.common.uri.UnescapedChildMapOfResource;
13 import org.simantics.db.exception.DatabaseException;
14 import org.simantics.db.layer0.util.Layer0Utils;
15 import org.simantics.event.ontology.EventResource;
16 import org.simantics.layer0.Layer0;
17 import org.simantics.utils.strings.AlphanumComparator;
19 public class EventWriteData {
21 public VirtualGraph vg;
23 public Resource eventLog;
24 public Resource targetSlice;
25 public String sliceName;
27 public Resource counterResource;
28 public Resource firstSliceResource;
29 public Map<String,Resource> slices;
32 public int targetSliceNumber;
34 public EventWriteData(ReadGraph graph, Resource eventLog, VirtualGraph vg) throws DatabaseException {
35 EventResource EVENT = EventResource.getInstance(graph);
37 this.L0 = Layer0.getInstance(graph);
38 this.eventLog = eventLog;
39 this.counterResource = graph.getSingleObject(eventLog, EVENT.HasModificationCounter);
40 this.counter = graph.getValue(this.counterResource, Bindings.INTEGER);
41 int sliceNumber = this.counter / EventUtils.SLICE_SIZE;
42 this.targetSlice = Layer0Utils.getPossibleChild(graph, eventLog, ""+sliceNumber);
43 this.sliceName = (this.targetSlice != null) ? ""+sliceNumber : "";
44 this.slices = graph.syncRequest(new UnescapedChildMapOfResource(eventLog));
47 public void prepareToWrite(WriteOnlyGraph graph) throws DatabaseException {
49 targetPos = counter % EventUtils.SLICE_SIZE;
50 targetSliceNumber = counter / EventUtils.SLICE_SIZE;
52 if(targetPos == 0 && !sliceName.equals(""+targetSliceNumber)) {
53 Layer0 L0 = graph.getService(Layer0.class);
54 EventResource EVENT = graph.getService(EventResource.class);
55 targetSlice = graph.newResource();
56 graph.claim(targetSlice, L0.InstanceOf, null, EVENT.EventSlice);
57 graph.addLiteral(targetSlice, L0.HasName, L0.NameOf, L0.String, ""+targetSliceNumber, Bindings.STRING);
58 graph.claim(targetSlice, L0.PartOf, L0.ConsistsOf, eventLog);
59 slices.put(""+targetSliceNumber, targetSlice);
60 sliceName = ""+targetSliceNumber;
65 public void written() {
69 public void commit(WriteOnlyGraph graph) throws DatabaseException {
71 graph.claimValue(counterResource, counter, Bindings.INTEGER);
73 int toRemove = Math.max(slices.size() - EventUtils.KEEPS_SLICES, 0);
76 // System.err.println("toRemove with counter=" + counter);
77 ArrayList<String> keys = new ArrayList<String>(slices.keySet());
78 Collections.sort(keys, AlphanumComparator.COMPARATOR);
79 for(int i=0;i<toRemove;i++) {
80 // System.err.println("-remove " + keys.get(i));
81 graph.deny(eventLog, L0.ConsistsOf, L0.PartOf, slices.get(keys.get(i)), vg);