X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=tests%2Forg.simantics.db.tests%2Fsrc%2Forg%2Fsimantics%2Fdb%2Ftests%2Fapi%2Fsupport%2FvirtualGraphSupport%2FVirtualGraphExample.java;fp=tests%2Forg.simantics.db.tests%2Fsrc%2Forg%2Fsimantics%2Fdb%2Ftests%2Fapi%2Fsupport%2FvirtualGraphSupport%2FVirtualGraphExample.java;h=90411a97b8d78b59794763ae0f9aae5842699797;hb=67fd62f9c742337ec80eef658192db198a0efaac;hp=0000000000000000000000000000000000000000;hpb=cde82ba81327d5515fdca362f7f4c70f5103ae80;p=simantics%2Fplatform.git

diff --git a/tests/org.simantics.db.tests/src/org/simantics/db/tests/api/support/virtualGraphSupport/VirtualGraphExample.java b/tests/org.simantics.db.tests/src/org/simantics/db/tests/api/support/virtualGraphSupport/VirtualGraphExample.java
new file mode 100644
index 000000000..90411a97b
--- /dev/null
+++ b/tests/org.simantics.db.tests/src/org/simantics/db/tests/api/support/virtualGraphSupport/VirtualGraphExample.java
@@ -0,0 +1,84 @@
+package org.simantics.db.tests.api.support.virtualGraphSupport;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.RequestProcessor;
+import org.simantics.db.Resource;
+import org.simantics.db.Session;
+import org.simantics.db.Statement;
+import org.simantics.db.VirtualGraph;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.common.request.ReadRequest;
+import org.simantics.db.common.request.WriteRequest;
+import org.simantics.db.common.request.WriteResultRequest;
+import org.simantics.db.common.utils.NameUtils;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.service.VirtualGraphSupport;
+import org.simantics.layer0.Layer0;
+
+/**
+ * Not really created into a proper test, more a demonstration that is available
+ * in <a href="http://dev.simantics.org/index.php/Virtual_Graphs">the Simantics
+ * developer wiki</a>.
+ * 
+ * @author Tuukka Lehtonen
+ */
+public class VirtualGraphExample {
+
+    public Resource createLibrary(RequestProcessor processor, VirtualGraph vg, final String libraryName) throws DatabaseException {
+        return processor.syncRequest(new WriteResultRequest<Resource>(vg) {
+            @Override
+            public Resource perform(WriteGraph graph) throws DatabaseException {
+                Layer0 L0 = Layer0.getInstance(graph);
+                Resource r = graph.newResource();
+                graph.claim(r, L0.InstanceOf, null, L0.Library);
+                graph.claimLiteral(r, L0.HasName, libraryName);
+                return r;
+            }
+        });
+    }
+
+    public void testVirtualGraphs(Session session) throws DatabaseException {
+        VirtualGraphSupport vgSupport = session.getService(VirtualGraphSupport.class);
+        VirtualGraph memory = vgSupport.getMemoryPersistent("memory");
+        VirtualGraph workspace = vgSupport.getWorkspacePersistent("workspace");
+        // NOTICE: resource are created in difference virtual graphs in separate
+        // transactions through Session.syncRequest.
+        Resource memResource = createLibrary(session, memory, "memory");
+        Resource workspaceResource = createLibrary(session, workspace, "workspace");
+        printVirtualGraphs(session);
+    }
+
+    public void testMultipleVirtualGraphsInSameTransaction(Session session) throws DatabaseException {
+        final VirtualGraphSupport vgSupport = session.getService(VirtualGraphSupport.class);
+        session.syncRequest(new WriteRequest() {
+            @Override
+            public void perform(WriteGraph graph) throws DatabaseException {
+                VirtualGraph memory = vgSupport.getMemoryPersistent("memory");
+                VirtualGraph workspace = vgSupport.getWorkspacePersistent("workspace");
+                // NOTICE: resource are created in different virtual graphs in
+                // the same transaction through WriteGraph.syncRequest
+                Resource memResource = createLibrary(graph, memory, "memory");
+                Resource workspaceResource = createLibrary(graph, workspace, "workspace");
+            }
+        });
+        printVirtualGraphs(session);
+    }
+
+    public void printVirtualGraphs(Session session) throws DatabaseException {
+        session.syncRequest(new ReadRequest() {
+            @Override
+            public void run(ReadGraph graph) throws DatabaseException {
+                VirtualGraphSupport vgSupport = graph.getService(VirtualGraphSupport.class);
+                for (VirtualGraph vg : vgSupport.listGraphs()) {
+                    for (Statement stm : vgSupport.listStatements(vg)) {
+                        System.out.println("Statement: " + NameUtils.toString(graph, stm));
+                    }
+                    for (Resource r : vgSupport.listValues(vg)) {
+                        System.out.println("Literal value: " + graph.getValue(r));
+                    }
+                }
+            }
+        });
+    }
+
+}