1 package org.simantics.db.tests.api.support.virtualGraphSupport;
3 import org.simantics.db.ReadGraph;
4 import org.simantics.db.RequestProcessor;
5 import org.simantics.db.Resource;
6 import org.simantics.db.Session;
7 import org.simantics.db.Statement;
8 import org.simantics.db.VirtualGraph;
9 import org.simantics.db.WriteGraph;
10 import org.simantics.db.common.request.ReadRequest;
11 import org.simantics.db.common.request.WriteRequest;
12 import org.simantics.db.common.request.WriteResultRequest;
13 import org.simantics.db.common.utils.NameUtils;
14 import org.simantics.db.exception.DatabaseException;
15 import org.simantics.db.service.VirtualGraphSupport;
16 import org.simantics.layer0.Layer0;
19 * Not really created into a proper test, more a demonstration that is available
20 * in <a href="http://dev.simantics.org/index.php/Virtual_Graphs">the Simantics
23 * @author Tuukka Lehtonen
25 public class VirtualGraphExample {
27 public Resource createLibrary(RequestProcessor processor, VirtualGraph vg, final String libraryName) throws DatabaseException {
28 return processor.syncRequest(new WriteResultRequest<Resource>(vg) {
30 public Resource perform(WriteGraph graph) throws DatabaseException {
31 Layer0 L0 = Layer0.getInstance(graph);
32 Resource r = graph.newResource();
33 graph.claim(r, L0.InstanceOf, null, L0.Library);
34 graph.claimLiteral(r, L0.HasName, libraryName);
40 public void testVirtualGraphs(Session session) throws DatabaseException {
41 VirtualGraphSupport vgSupport = session.getService(VirtualGraphSupport.class);
42 VirtualGraph memory = vgSupport.getMemoryPersistent("memory");
43 VirtualGraph workspace = vgSupport.getWorkspacePersistent("workspace");
44 // NOTICE: resource are created in difference virtual graphs in separate
45 // transactions through Session.syncRequest.
46 Resource memResource = createLibrary(session, memory, "memory");
47 Resource workspaceResource = createLibrary(session, workspace, "workspace");
48 printVirtualGraphs(session);
51 public void testMultipleVirtualGraphsInSameTransaction(Session session) throws DatabaseException {
52 final VirtualGraphSupport vgSupport = session.getService(VirtualGraphSupport.class);
53 session.syncRequest(new WriteRequest() {
55 public void perform(WriteGraph graph) throws DatabaseException {
56 VirtualGraph memory = vgSupport.getMemoryPersistent("memory");
57 VirtualGraph workspace = vgSupport.getWorkspacePersistent("workspace");
58 // NOTICE: resource are created in different virtual graphs in
59 // the same transaction through WriteGraph.syncRequest
60 Resource memResource = createLibrary(graph, memory, "memory");
61 Resource workspaceResource = createLibrary(graph, workspace, "workspace");
64 printVirtualGraphs(session);
67 public void printVirtualGraphs(Session session) throws DatabaseException {
68 session.syncRequest(new ReadRequest() {
70 public void run(ReadGraph graph) throws DatabaseException {
71 VirtualGraphSupport vgSupport = graph.getService(VirtualGraphSupport.class);
72 for (VirtualGraph vg : vgSupport.listGraphs()) {
73 for (Statement stm : vgSupport.listStatements(vg)) {
74 System.out.println("Statement: " + NameUtils.toString(graph, stm));
76 for (Resource r : vgSupport.listValues(vg)) {
77 System.out.println("Literal value: " + graph.getValue(r));