JavaでJanusGraphを組み込む方法

JAVA_HOME=c:\Program Files\AdoptOpenJDK\jdk-8.0.242.08-hotspot

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.mycompany</groupId>
    <artifactId>janusexample</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.janusgraph</groupId>
            <artifactId>janusgraph-core</artifactId>
            <version>0.5.1</version>
        </dependency>
        <dependency>
            <groupId>org.janusgraph</groupId>
            <artifactId>janusgraph-berkeleyje</artifactId>
            <version>0.5.1</version>
        </dependency>
    </dependencies>
</project>

gremlin.graph=org.janusgraph.core.JanusGraphFactory
storage.backend=berkeleyje
storage.directory=../db/berkeley

import org.apache.tinkerpop.gremlin.structure.Graph;
import org.janusgraph.core.JanusGraphFactory;

public class JanusExample {
    public static void main(String args[])
    {
        Graph graph = JanusGraphFactory.open("conf/embedded.properties");
        System.out.println(graph.toString());
        graph.close();
    }
}

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.janusgraph.core.JanusGraphFactory;

public class JanusExample {
    public static void main(String args[])
    {
        Graph graph = JanusGraphFactory.open("conf/embedded.properties");
        GraphTraversalSource g = graph.traversal();
        // グラフを空にする
        g.V().drop().iterate();
        // 頂点を1個追加する
        g.addV("person").property("name", "bob").property("age", 27).iterate();
        // 変更を確定
        g.tx().commit();
        // 値を取り出すクエリを発行してみる
        List<Map<Object, Object>> result = g.V().valueMap("name", "age").toList();
        // 戻り値は [{name: ["bob"], age: [27]}] が返ってくるはず
        for(Map<Object, Object> vertex : result){
            // vertexは {name:["bob"], age: [27]} のはず
            ArrayList<String> names = (ArrayList<String>)vertex.get("name");  // ["bob"]を得る
            ArrayList<Integer> ages = (ArrayList<Integer>)vertex.get("age");  // [27]を得る
            String name = names.get(0);  //"bob"を得る
            Integer age = ages.get(0);  //27を得る
            System.out.printf("name: %s, age: %s\n", name, age);
        }
        // 頂点数を取り出すクエリを発行してみる
        Long count = g.V().count().next();
        System.out.printf("vertex count is %d\n", count);
        graph.close();
    }
}

name: bob, age: 27
vertex count is 1