1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.db.layer0.service.impl;
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14 import java.io.IOException;
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15 import java.io.InputStream;
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16 import java.net.URL;
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17 import java.util.Enumeration;
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18 import java.util.UUID;
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20 import org.eclipse.core.runtime.IStatus;
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21 import org.eclipse.core.runtime.MultiStatus;
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22 import org.eclipse.core.runtime.Status;
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23 import org.osgi.framework.Bundle;
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24 import org.osgi.framework.BundleContext;
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25 import org.simantics.databoard.Bindings;
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26 import org.simantics.databoard.Datatypes;
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27 import org.simantics.databoard.serialization.Serializer;
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28 import org.simantics.databoard.type.Datatype;
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29 import org.simantics.db.Session;
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30 import org.simantics.db.VirtualGraph;
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31 import org.simantics.db.exception.DatabaseException;
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32 import org.simantics.db.layer0.internal.Activator;
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33 import org.simantics.db.service.VirtualGraphSupport;
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34 import org.simantics.db.services.ServiceInitializer;
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35 import org.simantics.graph.db.ImportAdvisor;
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36 import org.simantics.graph.db.TransferableGraphs;
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37 import org.simantics.graph.representation.TransferableGraph1;
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40 * A database client service initializer which ensures that any <code>.tg</code>
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41 * files defined in a bundle folder <code>virtualgraphs</code> are imported into
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42 * randomly named in-memory virtualgraphs for the initialized session.
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44 * @author Antti Villberg
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46 public class VirtualGraphInitializer implements ServiceInitializer {
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49 public IStatus initialize(Session s) {
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50 MultiStatus result = new MultiStatus(Activator.PLUGIN_ID, 0, "VirtualGraphInitialize errors:", null);
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51 BundleContext context = Activator.getInstance().getContext();
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52 Serializer datatypeSerializer = Bindings.getSerializerUnchecked( Datatype.class );
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53 Datatype tgType = Datatypes.getDatatypeUnchecked(TransferableGraph1.class);
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54 Serializer tgSerializer = Bindings.getSerializerUnchecked( TransferableGraph1.class );
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55 for (final Bundle b : context.getBundles()) {
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56 Enumeration<?> graphs = b.getEntryPaths("virtualgraphs");
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57 while(graphs != null && graphs.hasMoreElements()) {
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58 String element = (String)graphs.nextElement();
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59 if(!element.endsWith(".tg"))
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61 URL url = b.getEntry(element);
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63 InputStream stream = url.openStream();
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64 Datatype dt = (Datatype) datatypeSerializer.deserialize( stream );
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65 if(dt.equals(tgType)) {
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66 VirtualGraphSupport support = s.getService(VirtualGraphSupport.class);
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67 VirtualGraph vg = support.getMemoryPersistent(UUID.randomUUID().toString());
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68 TransferableGraph1 tg = (TransferableGraph1) tgSerializer.deserialize(stream);
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69 TransferableGraphs.importVirtualGraph(s, vg, tg,
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70 new ImportAdvisor());
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73 } catch (IOException e) {
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74 IStatus status = new Status(IStatus.ERROR, context.getBundle().getSymbolicName(), "VirtualGraphInitializer transferable graph initialization failed for '" + url.toString() + "', see exception for details.", e);
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76 } catch (DatabaseException e) {
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77 IStatus status = new Status(IStatus.ERROR, context.getBundle().getSymbolicName(), "VirtualGraphInitializer transferable graph initialization failed for '" + url.toString() + "', see exception for details.", e);
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82 if (!result.isOK()) return result;
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83 return Status.OK_STATUS;
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