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diff --git a/bundles/org.simantics.db.procore/src/fi/vtt/simantics/procore/internal/SessionImplDb.java b/bundles/org.simantics.db.procore/src/fi/vtt/simantics/procore/internal/SessionImplDb.java
new file mode 100644
index 000000000..3c0f71eaf
--- /dev/null
+++ b/bundles/org.simantics.db.procore/src/fi/vtt/simantics/procore/internal/SessionImplDb.java
@@ -0,0 +1,139 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package fi.vtt.simantics.procore.internal;
+
+import java.io.File;
+import java.io.IOException;
+
+import org.simantics.db.Database;
+import org.simantics.db.SessionManager;
+import org.simantics.db.SessionReference;
+import org.simantics.db.VirtualGraph;
+import org.simantics.db.authentication.UserAuthenticationAgent;
+import org.simantics.db.common.utils.Logger;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.exception.InvalidAuthenticationException;
+import org.simantics.db.exception.InvalidUserException;
+import org.simantics.db.impl.ClusterI;
+import org.simantics.db.impl.ClusterSupport;
+import org.simantics.db.impl.ClusterTranslator;
+import org.simantics.db.impl.ResourceImpl;
+import org.simantics.db.impl.graph.WriteSupport;
+import org.simantics.db.impl.query.QueryProcessor;
+import org.simantics.db.impl.query.QuerySupport;
+import org.simantics.db.service.ServerInformation;
+
+import fi.vtt.simantics.procore.BackdoorAuthenticator;
+
+final public class SessionImplDb extends SessionImplSocket {
+
+    /**
+     * Cached ServerInformation structure fetched from the server at connection
+     * time. It should never change during a single session and therefore it
+     * should be perfectly safe to cache it.
+     */
+    protected ServerInformationImpl serverInfo;
+
+    public SessionImplDb(SessionManager sessionManager, UserAuthenticationAgent authAgent) {
+        super(sessionManager, authAgent);
+    }
+
+    @Override
+    protected VirtualGraph getProvider(VirtualGraph vg) {
+        return vg;
+    }
+
+    @Override
+    public ResourceImpl getNewResource() throws DatabaseException {
+        if (null != defaultClusterSet)
+            return getNewResource(defaultClusterSet);
+        ClusterI cluster = getNewResourceCluster();
+        int newId;
+        try {
+            newId = cluster.createResource(clusterTranslator);
+        } catch (DatabaseException e) {
+            Logger.defaultLogError(e);
+            return null;
+        }
+        return new ResourceImpl(resourceSupport, newId);
+    }
+
+    public void connect(SessionReference sessionReference, final Database.Session dbSession) throws Exception {
+        if (null == clusterTable) {
+            File t = StaticSessionProperties.virtualGraphStoragePath;
+            if (null == t)
+                t = new File(".");
+            clusterTable = new ClusterTable(this, t);
+        }
+
+        graphSession = new GraphSessionSocket(this, sessionReference, dbSession);
+
+        try {
+
+            clusterStream = new ClusterStream(this, graphSession, false);
+
+            clusterTranslator = new ClusterTranslatorImpl(this);
+            serviceLocator.registerService(ClusterTranslator.class, clusterTranslator);
+            serviceLocator.registerService(ClusterSupport.class, clusterTranslator);
+
+            resourceSupport = new ResourceSupportImpl(this);
+
+            requestManager = new SessionRequestManager(this, state);
+
+            querySupport = new QuerySupportImpl(this, clusterTranslator, new SerialisationSupportImpl(this), requestManager);
+            serviceLocator.registerService(QuerySupport.class, querySupport);
+
+            queryProvider2 = new QueryProcessor(getAmountOfQueryThreads(), querySupport, sessionThreads);
+
+            writeSupport = new WriteSupportImpl(this);
+            serviceLocator.registerService(WriteSupport.class, writeSupport);
+
+            state.setGraphSession(this, graphSession, queryProvider2, clusterTable);
+
+            this.serverInfo = graphSession.getServerInformation();
+            
+//            authenticator = authAgent.getAuthenticator(serverInfo);
+//            if (authenticator == null)
+//                throw new InvalidAuthenticationException("Authentication agent did not provide an authenticator");
+//            if (authenticator instanceof BackdoorAuthenticator)
+//                user = authenticator.getUser(this);
+
+        } catch (InvalidAuthenticationException e) {
+            throw e;
+        } catch (InvalidUserException e) {
+            throw e;
+//        } catch (IOException e) {
+//            Logger.defaultLogError("I/O error. See exception for details.", e);
+//            graphSession = null;
+//            clusterTable.dispose(); clusterTable = null;
+//            throw e;
+        } catch (Throwable e) {
+            e.printStackTrace();
+            Logger.defaultLogError("Unhandled error. See exception for details.", e);
+            graphSession = null;
+            clusterTable.dispose(); clusterTable = null;
+            throw new Exception(e);
+        }
+
+        String databaseId = serverInfo.getDatabaseId();
+        String serverId = serverInfo.getServerId();
+        virtualGraphServerSupport.connect(databaseId + "." + serverId);
+        clusterSetsSupport.connect(databaseId + "." + serverId);
+
+    }
+
+    @Override
+    protected ServerInformation getCachedServerInformation() {
+        return serverInfo;
+    }
+
+}