gremlin graph-databases docker-container janusgraph java-17

Connecting To JanusGraph Using Java

Problem

How do you get Connecting to JanusGraph > Using Java to work?
Connecting to JanusGraph Using Java = Connecting from Java = Getting Started with JanusGraph and Gremlin-Java in this question. I don't know what I'm doing wrong.

This is with:

Docker-Image: janusgraph/janusgraph:latest 2023-04-11
SDK: corretto-17 "17.0.7"
Maven: 3.8.1

Reproduction

Steps

Download and Install Docker

Startup a JanusGraph Docker-container

$ docker run -it -p 8182:8182 janusgraph/janusgraph

Copy-Paste into CMD terminal

mvn archetype:generate -DgroupId=com.mycompany.project
    -DartifactId=gremlin-example
    -DarchetypeArtifactId=maven-archetype-quickstart
    -DinteractiveMode=false

PowerShell doesn't work on Guide-Step-1 without adding quotation-marks

Open Project in IDE
1. e.g. IntelliJ

Upsert Maven Packages for JanusGraph and Gremlin-Driver

<dependency>
    <groupId>org.janusgraph</groupId>
    <artifactId>janusgraph-driver</artifactId>
    <version>1.0.0-rc2</version>
</dependency>
<dependency>
    <groupId>org.apache.tinkerpop</groupId>
    <artifactId>gremlin-driver</artifactId>
    <version>3.6.2</version>
</dependency>

Guide-Step-2 at time of recording

Create-and-Add conf/remote-graph.properties and conf/remote-objects.yaml

gremlin.remote.remoteConnectionClass=org.apache.tinkerpop.gremlin.driver.remote.DriverRemoteConnection
gremlin.remote.driver.clusterFile=conf/remote-objects.yaml
gremlin.remote.driver.sourceName=g

hosts: [localhost]
port: 8182
serializer: { 
    className: org.apache.tinkerpop.gremlin.driver.ser.GraphBinaryMessageSerializerV1,
    config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}

Update App.main with GraphTraversalSource

import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
import static org.apache.tinkerpop.gremlin.process.traversal.AnonymousTraversalSource.traversal;
public class App {
    public static void main(String[] args) throws Exception {
        GraphTraversalSource g = traversal().withRemote("conf/remote-graph.properties");
        // Reuse 'g' across the application
        // and close it on shut-down to close open connections with g.close()
        Object herculesAge = g.V().has("name", "hercules").values("age").next();
        System.out.println("Hercules is " + herculesAge + " years old.");
        g.close();
    }
}

Run Project

Results

Expected

Program would run and printout Hercules's age.

Actual

Runtime Exception Error.

Exception in thread "main" java.util.concurrent.CompletionException: org.apache.tinkerpop.gremlin.driver.exception.ResponseException: The traversal source [g] for alias [g] is not configured on the server.
    at java.base/java.util.concurrent.CompletableFuture.reportJoin(CompletableFuture.java:413)
    at java.base/java.util.concurrent.CompletableFuture.join(CompletableFuture.java:2118)
    at org.apache.tinkerpop.gremlin.driver.ResultSet.one(ResultSet.java:123)
    at org.apache.tinkerpop.gremlin.driver.ResultSet$1.hasNext(ResultSet.java:175)
    at org.apache.tinkerpop.gremlin.driver.ResultSet$1.next(ResultSet.java:182)
    at org.apache.tinkerpop.gremlin.driver.ResultSet$1.next(ResultSet.java:169)
    at org.apache.tinkerpop.gremlin.driver.remote.DriverRemoteTraversal$TraverserIterator.next(DriverRemoteTraversal.java:115)
    at org.apache.tinkerpop.gremlin.driver.remote.DriverRemoteTraversal$TraverserIterator.next(DriverRemoteTraversal.java:100)
    at org.apache.tinkerpop.gremlin.driver.remote.DriverRemoteTraversal.nextTraverser(DriverRemoteTraversal.java:92)
    at org.apache.tinkerpop.gremlin.process.remote.traversal.step.map.RemoteStep.processNextStart(RemoteStep.java:80)
    at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.next(AbstractStep.java:135)
    at org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.next(AbstractStep.java:40)
    at org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversal.next(DefaultTraversal.java:249)
    at com.mycompany.project.App.main(App.java:15)
Caused by: org.apache.tinkerpop.gremlin.driver.exception.ResponseException: The traversal source [g] for alias [g] is not configured on the server.
    at org.apache.tinkerpop.gremlin.driver.Handler$GremlinResponseHandler.channelRead0(Handler.java:245)
    at org.apache.tinkerpop.gremlin.driver.Handler$GremlinResponseHandler.channelRead0(Handler.java:200)
    at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
    at org.apache.tinkerpop.gremlin.driver.Handler$GremlinSaslAuthenticationHandler.channelRead0(Handler.java:126)
    at org.apache.tinkerpop.gremlin.driver.Handler$GremlinSaslAuthenticationHandler.channelRead0(Handler.java:68)
    at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
    at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
    at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
    at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:93)
    at io.netty.handler.codec.http.websocketx.Utf8FrameValidator.channelRead(Utf8FrameValidator.java:89)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
    at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
    at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
    at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
    at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
    at java.base/java.lang.Thread.run(Thread.java:833)

Tried

Executing Guide.Step.1 PowerShell
1. Results in BUILD FAILURE for Maven
Changing conf folder locations
1. Runtime Exception Error: Exception in thread "main" org.apache.commons.configuration2.ex.ConfigurationException: Could not locate: FileLocator [basePath=null, encoding=ISO-8859-1, fileName=conf/remote-graph.properties, fileSystem=null, locationStrategy=null, sourceURL=null, urlConnectionOptions=null]
Running Local Installation JanusGraph on Windows with git-bash shell
1. No change in error

│   pom.xml
│   
├───src
│   ├───main
│   │   ├───java
│   │   │   └───com
│   │   │       └───mycompany
│   │   │           └───project
│   │   │                   App.java
│   │   │
│   │   └───resources
│   │       └───conf
│   │               remote-graph.properties
│   │               remote-objects.yaml

Solution

3-Part Problem: JanusGraph Container, Data Does Not Exist, and JanusGraph Example Does Not Load Data.

Delete JanusGraph container and remake a new one
1. JanusGraph-Server is in a bad-state, as noted by GitHub-Issues: #1826 and #2868
Load Data in
1. I don't know where JanusGraph's Graph Of The Gods data is saved
2. D3.js's Graph Of The Gods is pretty barebones
  1. And JanusGraph doesn't readily give an explanation of their import method
3. JanusGraph does not start with data like Neo4j, OrientDB, or ArcadeDB
JanusGraph documentation does not have preloaded nor steps-to-load this data in for their example

Update

Here's an example loading into JanusGraph with AnonymousTraversalSource.

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.tinkerpop.gremlin.process.traversal.TraversalSource;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
import org.apache.tinkerpop.gremlin.structure.Transaction;
import org.apache.tinkerpop.gremlin.structure.Vertex;

import static org.apache.tinkerpop.gremlin.process.traversal.AnonymousTraversalSource.traversal;

public class Main {
    private static final Logger logger = LogManager.getLogger(Main.class);
    public static void main(String[] args) throws Exception {
        GraphTraversalSource g = traversal().withRemote("conf/remote-graph.properties");
        Transaction tx = g.tx();
        tx.open();
        Vertex v1 = g.addV("person").property("name","marko").next();
        Vertex v2 = g.addV("person").property("name","stephen").next();
        g.V(v1).addE("knows").to(v2).property("weight",0.75).iterate();
        tx.commit();
        logger.info(g.V().count().next());
        g.close();
    }
}