Package com.tinkerpop.gremlin.structure.util.batch

Examples of com.tinkerpop.gremlin.structure.util.batch.BatchGraph

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        this.batchSize = batchSize;
    }

    @Override
    public void readGraph(final InputStream inputStream, final Graph graphToWriteTo) throws IOException {
        final BatchGraph graph;
        try {
            // will throw an exception if not constructed properly
            graph = BatchGraph.build(graphToWriteTo)
                    .bufferSize(batchSize).create();
        } catch (Exception ex) {
            throw new IOException("Could not instantiate BatchGraph wrapper", ex);
        }

        final JsonFactory factory = mapper.getFactory();
        final GraphSONUtility graphson = new GraphSONUtility(graph);

        try (JsonParser parser = factory.createParser(inputStream)) {
            if (parser.nextToken() != JsonToken.START_OBJECT)
                throw new IOException("Expected data to start with an Object");

            while (parser.nextToken() != JsonToken.END_OBJECT) {
                final String fieldName = parser.getCurrentName() == null ? "" : parser.getCurrentName();
                switch (fieldName) {
                    case GraphSONTokens.MODE:
                        parser.nextToken();
                        final String mode = parser.getText();
                        if (!mode.equals("EXTENDED"))
                            throw new IllegalStateException("The legacy GraphSON must be generated with GraphSONMode.EXTENDED");
                        break;
                    case GraphSONTokens.VERTICES:
                        parser.nextToken();
                        while (parser.nextToken() != JsonToken.END_ARRAY) {
                            final JsonNode node = parser.readValueAsTree();
                            graphson.vertexFromJson(node);
                        }
                        break;
                    case GraphSONTokens.EDGES:
                        parser.nextToken();
                        while (parser.nextToken() != JsonToken.END_ARRAY) {
                            final JsonNode node = parser.readValueAsTree();
                            final Vertex inV = graph.v(GraphSONUtility.getTypedValueFromJsonNode(node.get(GraphSONTokens._IN_V)));
                            final Vertex outV = graph.v(GraphSONUtility.getTypedValueFromJsonNode(node.get(GraphSONTokens._OUT_V)));
                            graphson.edgeFromJson(node, outV, inV);
                        }
                        break;
                    default:
                        throw new IllegalStateException(String.format("Unexpected token in GraphSON - %s", fieldName));
                }
            }

            graph.tx().commit();
        } catch (Exception ex) {
            // rollback whatever portion failed
            graph.tx().rollback();
            throw new IOException(ex);
        }

    }
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        this.edgeIdKey = edgeIdKey;
    }

    @Override
    public void readGraph(final InputStream inputStream, final Graph graphToWriteTo) throws IOException {
        final BatchGraph graph;
        try {
            // will throw an exception if not constructed properly
            graph = BatchGraph.build(graphToWriteTo)
                    .vertexIdKey(vertexIdKey)
                    .edgeIdKey(edgeIdKey)
                    .bufferSize(batchSize).create();
        } catch (Exception ex) {
            throw new IOException("Could not instantiate BatchGraph wrapper", ex);
        }

        final JsonFactory factory = mapper.getFactory();

        try (JsonParser parser = factory.createParser(inputStream)) {
            if (parser.nextToken() != JsonToken.START_OBJECT)
                throw new IOException("Expected data to start with an Object");

            while (parser.nextToken() != JsonToken.END_OBJECT) {
                final String fieldName = parser.getCurrentName();
                parser.nextToken();

                if (fieldName.equals(GraphSONTokens.VARIABLES)) {
                    final Map<String, Object> graphVariables = parser.readValueAs(mapTypeReference);
                    if (graphToWriteTo.features().graph().variables().supportsVariables())
                        graphVariables.entrySet().forEach(entry -> graphToWriteTo.variables().set(entry.getKey(), entry.getValue()));
                } else if (fieldName.equals(GraphSONTokens.VERTICES)) {
                    while (parser.nextToken() != JsonToken.END_ARRAY) {
                        final Map<String, Object> vertexData = parser.readValueAs(mapTypeReference);
                        readVertexData(vertexData, detachedVertex -> {
                            final Vertex v = Optional.ofNullable(graph.v(detachedVertex.id())).orElse(
                                    graph.addVertex(T.label, detachedVertex.label(), T.id, detachedVertex.id()));
                            detachedVertex.iterators().propertyIterator().forEachRemaining(p -> createVertexProperty(graphToWriteTo, v, p, false));
                            detachedVertex.iterators().hiddenPropertyIterator().forEachRemaining(p -> createVertexProperty(graphToWriteTo, v, p, true));
                            return v;
                        });
                    }
                } else if (fieldName.equals(GraphSONTokens.EDGES)) {
                    while (parser.nextToken() != JsonToken.END_ARRAY) {
                        final Map<String, Object> edgeData = parser.readValueAs(mapTypeReference);
                        readEdgeData(edgeData, detachedEdge -> {
                            final Vertex vOut = graph.v(detachedEdge.iterators().vertexIterator(Direction.OUT).next().id());
                            final Vertex vIn = graph.v(detachedEdge.iterators().vertexIterator(Direction.IN).next().id());
                            // batchgraph checks for edge id support and uses it if possible.
                            final Edge e = vOut.addEdge(edgeData.get(GraphSONTokens.LABEL).toString(), vIn, T.id, detachedEdge.id());
                            detachedEdge.iterators().propertyIterator().forEachRemaining(p -> e.<Object>property(p.key(), p.value()));
                            detachedEdge.iterators().hiddenPropertyIterator().forEachRemaining(p -> e.<Object>property(Graph.Key.hide(p.key()), p.value()));
                            return e;
                        });
                    }
                } else
                    throw new IllegalStateException(String.format("Unexpected token in GraphSON - %s", fieldName));
            }

            graph.tx().commit();
        } catch (Exception ex) {
            throw new IOException(ex);
        }
    }
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    public void readGraph(final InputStream inputStream, final Graph graphToWriteTo) throws IOException {
        this.counter.set(0);
        final Input input = new Input(inputStream);
        this.headerReader.read(kryo, input);

        final BatchGraph graph;
        try {
            // will throw an exception if not constructed properly
            graph = BatchGraph.build(graphToWriteTo)
                    .vertexIdKey(vertexIdKey)
                    .edgeIdKey(edgeIdKey)
                    .bufferSize(batchSize).create();
        } catch (Exception ex) {
            throw new IOException("Could not instantiate BatchGraph wrapper", ex);
        }

        try (final Output output = new Output(new FileOutputStream(tempFile))) {
            final boolean supportedMemory = input.readBoolean();
            if (supportedMemory) {
                // if the graph that serialized the data supported sideEffects then the sideEffects needs to be read
                // to advance the reader forward.  if the graph being read into doesn't support the sideEffects
                // then we just setting the data to sideEffects.
                final Map<String, Object> memMap = (Map<String, Object>) kryo.readObject(input, HashMap.class);
                if (graphToWriteTo.features().graph().variables().supportsVariables()) {
                    final Graph.Variables variables = graphToWriteTo.variables();
                    memMap.forEach(variables::set);
                }
            }

            final boolean hasSomeVertices = input.readBoolean();
            if (hasSomeVertices) {
                while (!input.eof()) {
                    final List<Object> vertexArgs = new ArrayList<>();
                    final DetachedVertex current = (DetachedVertex) kryo.readClassAndObject(input);
                    appendToArgList(vertexArgs, T.id, current.id());
                    appendToArgList(vertexArgs, T.label, current.label());

                    final Vertex v = graph.addVertex(vertexArgs.toArray());
                    current.iterators().propertyIterator().forEachRemaining(p -> createVertexProperty(graphToWriteTo, v, p, false));
                    current.iterators().hiddenPropertyIterator().forEachRemaining(p -> createVertexProperty(graphToWriteTo, v, p, true));

                    // the gio file should have been written with a direction specified
                    final boolean hasDirectionSpecified = input.readBoolean();
                    final Direction directionInStream = kryo.readObject(input, Direction.class);
                    final Direction directionOfEdgeBatch = kryo.readObject(input, Direction.class);

                    // graph serialization requires that a direction be specified in the stream and that the
                    // direction of the edges be OUT
                    if (!hasDirectionSpecified || directionInStream != Direction.OUT || directionOfEdgeBatch != Direction.OUT)
                        throw new IllegalStateException(String.format("Stream must specify edge direction and that direction must be %s", Direction.OUT));

                    // if there are edges then read them to end and write to temp, otherwise read what should be
                    // the vertex terminator
                    if (!input.readBoolean())
                        kryo.readClassAndObject(input);
                    else
                        readToEndOfEdgesAndWriteToTemp(input, output);
                }
            }
        } catch (Exception ex) {
            throw new IOException(ex);
        }
        // done writing to temp

        // start reading in the edges now from the temp file
        try (final Input edgeInput = new Input(new FileInputStream(tempFile))) {
            readFromTempEdges(edgeInput, graph);
            graph.tx().commit();
        } catch (Exception ex) {
            ex.printStackTrace();
            throw new IOException(ex);
        } finally {
            deleteTempFileSilently();
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        throw new UnsupportedOperationException("GraphML does not allow for a partial structure");
    }

    @Override
    public void readGraph(final InputStream graphInputStream, final Graph graphToWriteTo) throws IOException {
        final BatchGraph graph;
        try {
            // will throw an exception if not constructed properly
            graph = BatchGraph.build(graphToWriteTo)
                    .vertexIdKey(vertexIdKey)
                    .bufferSize(batchSize).create();
        } catch (Exception ex) {
            throw new IOException("Could not instantiate BatchGraph wrapper", ex);
        }

        try {
            final XMLStreamReader reader = inputFactory.createXMLStreamReader(graphInputStream);
            final Map<String, String> keyIdMap = new HashMap<>();
            final Map<String, String> keyTypesMaps = new HashMap<>();

            // Buffered Vertex Data
            String vertexId = null;
            String vertexLabel = null;
            Map<String, Object> vertexProps = null;
            boolean isInVertex = false;

            // Buffered Edge Data
            String edgeId = null;
            String edgeLabel = null;
            Vertex edgeInVertex = null;
            Vertex edgeOutVertex = null;
            Map<String, Object> edgeProps = null;
            boolean isInEdge = false;

            while (reader.hasNext()) {
                final Integer eventType = reader.next();
                if (eventType.equals(XMLEvent.START_ELEMENT)) {
                    final String elementName = reader.getName().getLocalPart();

                    switch (elementName) {
                        case GraphMLTokens.KEY:
                            final String id = reader.getAttributeValue(null, GraphMLTokens.ID);
                            final String attributeName = reader.getAttributeValue(null, GraphMLTokens.ATTR_NAME);
                            final String attributeType = reader.getAttributeValue(null, GraphMLTokens.ATTR_TYPE);
                            keyIdMap.put(id, attributeName);
                            keyTypesMaps.put(id, attributeType);
                            break;
                        case GraphMLTokens.NODE:
                            vertexId = reader.getAttributeValue(null, GraphMLTokens.ID);
                            isInVertex = true;
                            vertexProps = new HashMap<>();
                            break;
                        case GraphMLTokens.EDGE:
                            edgeId = reader.getAttributeValue(null, GraphMLTokens.ID);

                            final String vertexIdOut = reader.getAttributeValue(null, GraphMLTokens.SOURCE);
                            final String vertexIdIn = reader.getAttributeValue(null, GraphMLTokens.TARGET);

                            // graphml allows edges and vertices to be mixed in terms of how they are positioned
                            // in the xml therefore it is possible that an edge is created prior to its definition
                            // as a vertex.
                            edgeOutVertex = Optional.ofNullable(graph.v(vertexIdOut))
                                    .orElseGet(() -> graph.addVertex(T.id, vertexIdOut));
                            edgeInVertex = Optional.ofNullable(graph.v(vertexIdIn))
                                    .orElseGet(() -> graph.addVertex(T.id, vertexIdIn));

                            isInEdge = true;
                            edgeProps = new HashMap<>();

                            break;
                        case GraphMLTokens.DATA:
                            final String key = reader.getAttributeValue(null, GraphMLTokens.KEY);
                            final String dataAttributeName = keyIdMap.get(key);

                            if (dataAttributeName != null) {
                                final String value = reader.getElementText();

                                if (isInVertex) {
                                    if (key.equals(vertexLabelKey))
                                        vertexLabel = value;
                                    else
                                        vertexProps.put(dataAttributeName, typeCastValue(key, value, keyTypesMaps));
                                } else if (isInEdge) {
                                    if (key.equals(edgeLabelKey))
                                        edgeLabel = value;
                                    else if (key.equals(edgeIdKey))
                                        edgeId = value;
                                    else
                                        edgeProps.put(dataAttributeName, typeCastValue(key, value, keyTypesMaps));
                                }
                            }

                            break;
                    }
                } else if (eventType.equals(XMLEvent.END_ELEMENT)) {
                    final String elementName = reader.getName().getLocalPart();

                    if (elementName.equals(GraphMLTokens.NODE)) {
                        final String currentVertexId = vertexId;
                        final String currentVertexLabel = Optional.ofNullable(vertexLabel).orElse(Vertex.DEFAULT_LABEL);
                        final Object[] propsAsArray = vertexProps.entrySet().stream().flatMap(e -> Stream.of(e.getKey(), e.getValue())).toArray();

                        // if incremental loading is on in batchgraph it handles graphml spec where it states that
                        // order of edges/vertices may be mixed such that an edge may be created before an vertex.
                        graph.addVertex(Stream.concat(Stream.of(T.id, currentVertexId, T.label, currentVertexLabel),
                                Stream.of(propsAsArray)).toArray());

                        vertexId = null;
                        vertexLabel = null;
                        vertexProps = null;
                        isInVertex = false;
                    } else if (elementName.equals(GraphMLTokens.EDGE)) {
                        final Object[] propsAsArray = edgeProps.entrySet().stream().flatMap(e -> Stream.of(e.getKey(), e.getValue())).toArray();
                        edgeOutVertex.addEdge(edgeLabel, edgeInVertex, Stream.concat(Stream.of(T.id, edgeId),
                                Stream.of(propsAsArray)).toArray());

                        edgeId = null;
                        edgeLabel = null;
                        edgeOutVertex = null;
                        edgeInVertex = null;
                        edgeProps = null;
                        isInEdge = false;
                    }

                }
            }

            graph.tx().commit();
        } catch (XMLStreamException xse) {
            // rollback whatever portion failed
            graph.tx().rollback();
            throw new IOException(xse);
        }
    }
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    @FeatureRequirementSet(FeatureRequirementSet.Package.SIMPLE)
    @FeatureRequirement(featureClass = Graph.Features.VertexPropertyFeatures.class, feature = FEATURE_INTEGER_VALUES)
    @FeatureRequirement(featureClass = Graph.Features.EdgePropertyFeatures.class, feature = Graph.Features.EdgePropertyFeatures.FEATURE_DOUBLE_VALUES)
    @FeatureRequirement(featureClass = Graph.Features.VertexFeatures.class, feature = FEATURE_USER_SUPPLIED_IDS)
    public void shouldLoadVerticesIncrementallyWithSuppliedIdentifier() {
        final BatchGraph graph = BatchGraph.build(g)
                .incrementalLoading(true)
                .bufferSize(1).create();
        final Object id1 = GraphManager.get().convertId("1");
        final Object id2 = GraphManager.get().convertId("2");
        graph.addVertex(T.id, id1, "name", "marko", "age", 29);
        final Vertex v1 = graph.addVertex(T.id, id2, "name", "stephen", "age", 37);
        final Vertex v2 = graph.addVertex(T.id, id1, "name", "marko", "age", 34);
        v1.addEdge("knows", v2, "weight", 1.0d);
        tryCommit(graph);

        final Vertex vStephen = g.V().<Vertex>has("name", "stephen").next();
        assertEquals(37, vStephen.property("age").value());
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    @Test
    @FeatureRequirementSet(FeatureRequirementSet.Package.SIMPLE)
    @FeatureRequirement(featureClass = Graph.Features.VertexPropertyFeatures.class, feature = FEATURE_INTEGER_VALUES)
    @FeatureRequirement(featureClass = Graph.Features.EdgePropertyFeatures.class, feature = Graph.Features.EdgePropertyFeatures.FEATURE_DOUBLE_VALUES)
    public void shouldLoadVerticesIncrementallyWithNamedIdentifier() {
        final BatchGraph graph = BatchGraph.build(g)
                .incrementalLoading(true)
                .vertexIdKey("name")
                .bufferSize(1).create();
        graph.addVertex(T.id, "marko", "age", 29);
        final Vertex v1 = graph.addVertex(T.id, "stephen", "age", 37);
        final Vertex v2 = graph.addVertex(T.id, "marko", "age", 34);
        v1.addEdge("knows", v2, "weight", 1.0d);
        tryCommit(graph);

        final Vertex vStephen = g.V().<Vertex>has("name", "stephen").next();
        assertEquals(37, vStephen.property("age").value());
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    @Test
    @FeatureRequirementSet(FeatureRequirementSet.Package.VERTICES_ONLY)
    @FeatureRequirement(featureClass = Graph.Features.VertexPropertyFeatures.class, feature = FEATURE_INTEGER_VALUES)
    @FeatureRequirement(featureClass = Graph.Features.VertexFeatures.class, feature = FEATURE_USER_SUPPLIED_IDS)
    public void shouldLoadVerticesIncrementallyWithSuppliedIdentifierThrowOnExistingVertex() {
        final BatchGraph graph = BatchGraph.build(g)
                .incrementalLoading(true, Exists.THROW, Exists.IGNORE)
                .bufferSize(1).create();
        final Object id1 = GraphManager.get().convertId("1");
        graph.addVertex(T.id, id1, "name", "marko", "age", 29);
        try {
            graph.addVertex(T.id, id1, "name", "marko", "age", 34);
            fail("Should have thrown an error because the vertex already exists");
        } catch (Exception ex) {
            assertTrue(ex instanceof IllegalStateException);
        }
    }
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    @Test
    @FeatureRequirementSet(FeatureRequirementSet.Package.VERTICES_ONLY)
    @FeatureRequirement(featureClass = Graph.Features.VertexPropertyFeatures.class, feature = FEATURE_INTEGER_VALUES)
    public void shouldLoadVerticesIncrementallyWithNamedIdentifierThrowOnExistingVertex() {
        final BatchGraph graph = BatchGraph.build(g)
                .incrementalLoading(true, Exists.THROW, Exists.IGNORE)
                .vertexIdKey("name")
                .bufferSize(1).create();
        graph.addVertex(T.id, "marko", "age", 29);
        try {
            graph.addVertex(T.id, "marko", "age", 34);
            fail("Should have thrown an error because the vertex already exists");
        } catch (Exception ex) {
            assertTrue(ex instanceof IllegalStateException);
        }
    }
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    @FeatureRequirementSet(FeatureRequirementSet.Package.SIMPLE)
    @FeatureRequirement(featureClass = Graph.Features.VertexPropertyFeatures.class, feature = FEATURE_INTEGER_VALUES)
    @FeatureRequirement(featureClass = Graph.Features.EdgePropertyFeatures.class, feature = Graph.Features.EdgePropertyFeatures.FEATURE_DOUBLE_VALUES)
    @FeatureRequirement(featureClass = Graph.Features.VertexFeatures.class, feature = FEATURE_USER_SUPPLIED_IDS)
    public void shouldLoadVerticesIncrementallyWithSuppliedIdentifierOverwriteSingleExistingVertex() {
        final BatchGraph graph = BatchGraph.build(g)
                .incrementalLoading(true, Exists.OVERWRITE_SINGLE, Exists.IGNORE)
                .bufferSize(1).create();
        final Object id1 = GraphManager.get().convertId("1");
        final Object id2 = GraphManager.get().convertId("2");
        graph.addVertex(T.id, id1, "name", "marko", "age", 29);
        final Vertex v1 = graph.addVertex(T.id, id2, "name", "stephen", "age", 37);
        final Vertex v2 = graph.addVertex(T.id, id1, "name", "marko", "age", 34);
        v1.addEdge("knows", v2, "weight", 1.0d);
        tryCommit(graph);

        final Vertex vStephen = g.V().<Vertex>has("name", "stephen").next();
        assertEquals(37, vStephen.property("age").value());
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    @Test
    @FeatureRequirementSet(FeatureRequirementSet.Package.SIMPLE)
    @FeatureRequirement(featureClass = Graph.Features.VertexPropertyFeatures.class, feature = FEATURE_INTEGER_VALUES)
    @FeatureRequirement(featureClass = Graph.Features.EdgePropertyFeatures.class, feature = Graph.Features.EdgePropertyFeatures.FEATURE_DOUBLE_VALUES)
    public void shouldLoadVerticesIncrementallyWithNamedIdentifierOverwriteSingleExistingVertex() {
        final BatchGraph graph = BatchGraph.build(g)
                .incrementalLoading(true, Exists.OVERWRITE_SINGLE, Exists.IGNORE)
                .vertexIdKey("name")
                .bufferSize(1).create();
        graph.addVertex(T.id, "marko", "age", 29);
        final Vertex v1 = graph.addVertex(T.id, "stephen", "age", 37);
        final Vertex v2 = graph.addVertex(T.id, "marko", "age", 34);
        v1.addEdge("knows", v2, "weight", 1.0d);
        tryCommit(graph);

        final Vertex vStephen = g.V().<Vertex>has("name", "stephen").next();
        assertEquals(37, vStephen.property("age").value());
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Related Classes of com.tinkerpop.gremlin.structure.util.batch.BatchGraph

  • com.tinkerpop.gremlin.structure.BatchTest
  • com.tinkerpop.gremlin.structure.Edge
  • com.tinkerpop.gremlin.structure.io.graphml.GraphMLReader
  • com.tinkerpop.gremlin.structure.io.graphson.GraphSONReader
  • com.tinkerpop.gremlin.structure.io.graphson.LegacyGraphSONReader
  • com.tinkerpop.gremlin.structure.io.kryo.KryoReader
  • com.tinkerpop.gremlin.structure.Vertex
  • org.apache.commons.configuration.BaseConfiguration
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