Java Neo4jGraph类代码示例

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
@Override
public Map<String, Object> getBaseConfiguration(final String graphName, final Class<?> test, final String testMethodName, final LoadGraphWith.GraphData graphData) {
    final String directory = makeTestDirectory(graphName, test, testMethodName);

    return new HashMap<String, Object>() {{
        put(Graph.GRAPH, Neo4jGraph.class.getName());
        put(Neo4jGraph.CONFIG_DIRECTORY, directory);
        put(Neo4jGraph.CONFIG_META_PROPERTIES, true);
        put(Neo4jGraph.CONFIG_MULTI_PROPERTIES, true);
    }};
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
@Override
public void clear(final Graph graph, final Configuration configuration) throws Exception {
    if (null != graph) {
        if (graph.tx().isOpen()) graph.tx().rollback();
        graph.close();
    }

    if (configuration.containsKey(Neo4jGraph.CONFIG_DIRECTORY)) {
        // this is a non-in-sideEffects configuration so blow away the directory
        final File graphDirectory = new File(configuration.getString(Neo4jGraph.CONFIG_DIRECTORY));
        deleteDirectory(graphDirectory);
    }
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
public static void dropIndices(final Neo4jGraph graph, final LoadGraphWith.GraphData graphData) {
    if (graphData.equals(LoadGraphWith.GraphData.GRATEFUL)) {
        graph.tx().readWrite();
        graph.cypher("DROP INDEX ON :artist(name)").iterate();
        graph.cypher("DROP INDEX ON :song(name)").iterate();
        graph.cypher("DROP INDEX ON :song(songType)").iterate();
        graph.cypher("DROP INDEX ON :song(performances)").iterate();
        graph.tx().commit();
    } else if (graphData.equals(LoadGraphWith.GraphData.MODERN)) {
        graph.tx().readWrite();
        graph.cypher("DROP INDEX ON :person(name)").iterate();
        graph.cypher("DROP INDEX ON :person(age)").iterate();
        graph.cypher("DROP INDEX ON :software(name)").iterate();
        graph.cypher("DROP INDEX ON :software(lang)").iterate();
        graph.tx().commit();
    } else if (graphData.equals(LoadGraphWith.GraphData.CLASSIC)) {
        graph.tx().readWrite();
        graph.cypher("DROP INDEX ON :vertex(name)").iterate();
        graph.cypher("DROP INDEX ON :vertex(age)").iterate();
        graph.cypher("DROP INDEX ON :vertex(lang)").iterate();
        graph.tx().commit();
    } else {
        // TODO: add CREW work here.
        // TODO: add meta_property indices when meta_property graph is provided
        //throw new RuntimeException("Could not load graph with " + graphData);
    }
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
@Override
public Map<String, Object> getBaseConfiguration(final String graphName, final Class<?> test, final String testMethodName, final LoadGraphWith.GraphData graphData) {
    final String directory = makeTestDirectory(graphName, test, testMethodName);

    return new HashMap<String, Object>() {{
        put(Graph.GRAPH, Neo4jGraph.class.getName());
        put(Neo4jGraph.CONFIG_DIRECTORY, directory);
        put(Neo4jGraph.CONFIG_META_PROPERTIES, false);
        put(Neo4jGraph.CONFIG_MULTI_PROPERTIES, false);
    }};
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
private static Storage getStorage(AntiochConfiguration config) {
  String dataDir = config.getStorageDirectory() + "/neo4jdb";
  createWhenAbsent(dataDir);
  try {
    graph = Neo4jGraph.open(dataDir);
  } catch (Exception e) {
    e.printStackTrace();
    throw new RuntimeException("There was an error starting up the Neo4J graph; If this was caused by an interrupted indexing job, restarting the server might help.");
  }
  setIndexes();
  return new Storage(graph);
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
@BeforeClass
public static void setGraphProvider() throws IOException {
    GraphTest.graphProvider = new GraphProvider() {
        public Graph getGraph() throws IOException {
            return Neo4jGraph.open(folder.newFolder().getAbsolutePath());
        }
    };
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
@Override
public Map<String, Object> getBaseConfiguration(final String graphName, final Class<?> test, final String testMethodName, final LoadGraphWith.GraphData graphData) {
    final String directory = makeTestDirectory(graphName, test, testMethodName);

    return new HashMap<String, Object>() {{
        put(Graph.GRAPH, Neo4jGraph.class.getName());
        put(Neo4jGraph.CONFIG_DIRECTORY, directory);
        put(Neo4jGraph.CONFIG_META_PROPERTIES, true);
        put(Neo4jGraph.CONFIG_MULTI_PROPERTIES, true);
        put(Neo4jGraph.CONFIG_CONF + ".dbms.memory.pagecache.size", "1m");
    }};
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
@Override
public Map<String, Object> getBaseConfiguration(final String graphName, final Class<?> test, final String testMethodName, final LoadGraphWith.GraphData graphData) {
    final String directory = makeTestDirectory(graphName, test, testMethodName);

    return new HashMap<String, Object>() {{
        put(Graph.GRAPH, Neo4jGraph.class.getName());
        put(Neo4jGraph.CONFIG_DIRECTORY, directory);
        put(Neo4jGraph.CONFIG_META_PROPERTIES, false);
        put(Neo4jGraph.CONFIG_MULTI_PROPERTIES, false);
        put(Neo4jGraph.CONFIG_CONF + ".dbms.memory.pagecache.size", "1m");
    }};
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
@Parameterized.Parameters(name = "{0}")
public static Iterable<Object[]> generateTestParameters() {
    final int LAZY_SIZE = 2500;
    return Arrays.asList(new Object[][]{
            {__.V().out(), g_V().out(), Collections.emptyList()},
            {__.V().has("name", "marko").out(), g_V("name", eq("marko")).out(), Collections.emptyList()},
            {__.V().has("name", "marko").has("age", gt(31).and(lt(10))).out(),
                    g_V("name", eq("marko"), "age", gt(31), "age", lt(10)).out(), Collections.emptyList()},
            {__.V().has("name", "marko").or(has("age"), has("age", gt(32))).has("lang", "java"),
                    g_V("name", eq("marko"), "lang", eq("java")).or(has("age"), has("age", gt(32))), Collections.singletonList(FilterRankingStrategy.instance())},
            {__.V().has("name", "marko").as("a").or(has("age"), has("age", gt(32))).has("lang", "java"),
                    g_V("name", eq("marko")).as("a").or(has("age"), has("age", gt(32))).has("lang", "java"), Collections.emptyList()},
            {__.V().has("name", "marko").as("a").or(has("age"), has("age", gt(32))).has("lang", "java"),
                    g_V("name", eq("marko"), "lang", eq("java")).or(has("age"), has("age", gt(32))).as("a"), Collections.singletonList(FilterRankingStrategy.instance())},
            {__.V().dedup().has("name", "marko").or(has("age"), has("age", gt(32))).has("lang", "java"),
                    g_V("name", eq("marko"), "lang", eq("java")).or(has("age"), has("age", gt(32))).dedup(), Collections.singletonList(FilterRankingStrategy.instance())},
            {__.V().as("a").dedup().has("name", "marko").or(has("age"), has("age", gt(32))).has("lang", "java"),
                    g_V("name", eq("marko"), "lang", eq("java")).or(has("age"), has("age", gt(32))).dedup().as("a"), Collections.singletonList(FilterRankingStrategy.instance())},
            {__.V().as("a").has("name", "marko").as("b").or(has("age"), has("age", gt(32))).has("lang", "java"),
                    g_V("name", eq("marko"), "lang", eq("java")).or(has("age"), has("age", gt(32))).as("b", "a"), Collections.singletonList(FilterRankingStrategy.instance())},
            {__.V().as("a").dedup().has("name", "marko").or(has("age"), has("age", gt(32))).filter(has("name", "bob")).has("lang", "java"),
                    g_V("name", eq("marko"), "lang", eq("java"), "name", eq("bob")).or(has("age"), has("age", gt(32))).dedup().as("a"), Arrays.asList(InlineFilterStrategy.instance(), FilterRankingStrategy.instance())},
            {__.V().as("a").dedup().has("name", "marko").or(has("age", 10), has("age", gt(32))).filter(has("name", "bob")).has("lang", "java"),
                    g_V("name", eq("marko"), "lang", eq("java"), "name", eq("bob"), "age", eq(10).or(gt(32))).dedup().as("a"), TraversalStrategies.GlobalCache.getStrategies(Neo4jGraph.class).toList()},
            {__.V().has("name", "marko").or(not(has("age")), has("age", gt(32))).has("name", "bob").has("lang", "java"),
                    g_V("name", eq("marko"), "name", eq("bob"), "lang", eq("java")).or(not(filter(properties("age"))), has("age", gt(32))), TraversalStrategies.GlobalCache.getStrategies(Neo4jGraph.class).toList()},
            {__.V().has("name", P.eq("marko").or(P.eq("bob").and(P.eq("stephen")))).out("knows"),
                    g_V("name", eq("marko").or(P.eq("bob").and(P.eq("stephen")))).out("knows"), Collections.emptyList()},
            {__.V().has("name", P.eq("marko").and(P.eq("bob").and(P.eq("stephen")))).out("knows"),
                    g_V("name", eq("marko"), "name", eq("bob"), "name", eq("stephen")).out("knows"), Collections.emptyList()},
            {__.V().has("name", P.eq("marko").and(P.eq("bob").or(P.eq("stephen")))).out("knows"),
                    g_V("name", eq("marko"), "name", P.eq("bob").or(eq("stephen"))).out("knows"), Collections.emptyList()},
            ///////
            {__.V().out().out().V().has("name", "marko").out(), g_V().out().barrier(LAZY_SIZE).out().barrier(LAZY_SIZE).asAdmin().addStep(V("name", eq("marko"))).barrier(LAZY_SIZE).out(), Arrays.asList(InlineFilterStrategy.instance(), FilterRankingStrategy.instance(), LazyBarrierStrategy.instance())},
            {__.V().out().out().V().has("name", "marko").as("a").out(), g_V().out().barrier(LAZY_SIZE).out().barrier(LAZY_SIZE).asAdmin().addStep(V("name", eq("marko"))).barrier(LAZY_SIZE).as("a").out(), Arrays.asList(InlineFilterStrategy.instance(), FilterRankingStrategy.instance(), LazyBarrierStrategy.instance())},
            {__.V().out().V().has("age", gt(32)).barrier(10).has("name", "marko").as("a"), g_V().out().barrier(LAZY_SIZE).asAdmin().addStep(V("age", gt(32), "name", eq("marko"))).barrier(LAZY_SIZE).barrier(10).as("a"), Arrays.asList(InlineFilterStrategy.instance(), FilterRankingStrategy.instance(), LazyBarrierStrategy.instance())},
            {__.V().out().V().has("age", gt(32)).barrier(10).has("name", "marko").as("a"), g_V().out().barrier(LAZY_SIZE).asAdmin().addStep(V("age", gt(32), "name", eq("marko"))).barrier(LAZY_SIZE).barrier(10).as("a"), TraversalStrategies.GlobalCache.getStrategies(Neo4jGraph.class).toList()},
    });
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
private static Neo4jGraph getOrCreateGraph(final GraphDatabaseService database) {
    if (neo4jGraph == null) {
        synchronized (LOCK) {
            if (neo4jGraph == null) {
                final Neo4jGraphAPI neo4jGraphAPI = new Neo4jGraphAPIImpl(database);
                neo4jGraph = Neo4jGraph.open(neo4jGraphAPI);
            }
        }
    }
    return neo4jGraph;
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
@Override
public void start() throws Exception {
  synchronized (graphWaitList) {
    initGraphDatabaseService();
    this.graph = Neo4jGraph.open(new Neo4jGraphAPIImpl(graphDatabase));
    new DatabaseMigrator(this, migrations).execute();
    callWaiters();
  }
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
public Neo4jGraph build() {
  //When creating a new database you have to close the previous one, because
  //each database will create a new thread. This fills up the available
  //threads when running thousands of tests.
  //
  //Closing the database is very slow however (testruns go from less then a
  //second to 3 minutes on a machine with an SSD) so instead we now re-use
  //the same neo4j database that we clear when the function to create a new
  //one is called.
  if (neo4jDb == reusableNeo4jDb) {
    if (trans != null) {
      trans.close();
    }
    cleanDb(neo4jDb);
  }
  Neo4jGraphAPIImpl neo4jGraphApi = new Neo4jGraphAPIImpl(neo4jDb);
  Neo4jGraph neo4jGraph = Neo4jGraph.open(neo4jGraphApi);

  try (org.apache.tinkerpop.gremlin.structure.Transaction tx = neo4jGraph.tx()) {
    final List<RelationData> requestedRelations = new LinkedList<>();
    final Map<String, Vertex> identifiableVertices = new HashMap<>();
    //Create all identifiable vertices
    graphFragmentBuilders.forEach(
      builder -> {
        Tuple<Vertex, String> result = builder.build(neo4jGraph, requestedRelations::add);
        identifiableVertices.put(result.getRight(), result.getLeft());
      }
    );
    //then we can create the relations between them
    requestedRelations.forEach(
      relationData -> relationData.makeRelation(identifiableVertices)
    );
    tx.commit();
  }

  if (neo4jDb == reusableNeo4jDb) { //we're re-using the database
    trans = neo4jDb.beginTx(); //make sure we own the toplevel transaction so are guaranteed to close it
  }
  return neo4jGraph;
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
private Iterator<? extends Vertex> vertices() {
    final Neo4jGraph graph = (Neo4jGraph) this.getTraversal().getGraph().get();
    return graph.getTrait().lookupVertices(graph, this.hasContainers, this.ids);
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
public Neo4jCypherIterator(final Iterator<Map<String, T>> iterator, final Neo4jGraph graph) {
    this.iterator = iterator;
    this.graph = graph;
}
 

import org.apache.tinkerpop.gremlin.neo4j.structure.Neo4jGraph; //导入依赖的package包/类
@Override
public void loadGraphData(final Graph graph, final LoadGraphWith loadGraphWith, final Class testClass, final String testName) {
    if (loadGraphWith != null) this.createIndices((Neo4jGraph) graph, loadGraphWith.value());
    super.loadGraphData(graph, loadGraphWith, testClass, testName);
}