Dynamic Graphs is Java irrealizable ? #2990
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vtslab
ZhangErling
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Hello, thank you for browsing I tried my best, still can't find Java best practices for ConfiguredGraphFactory I implemented these examples using Gremlin
I see these discussions again
I have read the official configuration document Dynamic Graphs several times, And follow his instructions to read the Using TinkerPop’s withRemote Functionality document, Gremlin-Java is considered the canonical, reference implementation of Gremlin and serves as the foundation by which all other Gremlin language variants should emulate gremlin-server Uses gremlin-server-configuration.yaml to start the serviceOnce I've done the above configuration, I use these two classes JanusGraphFactory.getGraphNames();
ConfiguredGraphFactory.getGraphNames();
Code execution successfulgremlin-server Uses gremlin-server-cql-es.yaml to start the service Code execution failuregremlin-server Uses gremlin-server-configuration.yaml to start the service Configuration File DescriptionThe gremlin-server startup mode is to overwrite file gremlin-server.yaml with file gremlin-server-configuration.yaml gremlin-servergremlin-server.yaml Derived from gremlin-server-configuration.yaml janusgraph-cql-configurationgraph.properties gremlin-clientremote-objects.yaml java-clinetremote-objects.yaml conf/remote-graph.properties pom.xml Operating Environment janusgraph-0.6.1 If you need any other configuration or logs please contact me and I will continue to provide them. The last: It would be great if JanusGraph could provide Java's ConfiguredGraphFactory best practices, which would greatly enrich the documentation and help more beginners explore the graph world Thanks again for your reading and suggestions ! |
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Answered by
vtslab
Mar 21, 2022
Replies: 3 comments 5 replies
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Can you please add:
In the pom.xml for your java client app you only need the janusgraph-driver dependency. The other JanusGraph and TinkerPop deps can only hurt, if library conflicts occur. |
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Hi, I'd be happy to provide it! Gremlin and Java use the same gremlin Server configuration file.
This is a graphs: { ConfigurationManagementGraph: conf/janusgraph-cql-configurationgraph.properties } properties file janusgraph-cql-configurationgraph.properties
Does the above description help you understand my configuration? If not, please continue with your questions.Thank you for your help! It's worth noting that I'm not using ElasticSearch in the ConfiguredGraphFactory for the time being, I'm only using it for simple traversal.Code execution failure may give you a misunderstanding, I am sorry! |
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I suspect that Gremlin Server simply does not run with the gremlin-server.yaml + conf/janusgraph-cql-configurationgraph.properties as listed above. So, after connecting with the java gremlin client, check in the logs/janusgraph.log that there is not a line like: 3445 [main] INFO org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor - A GraphTraversalSource is now bound to [g] with graphtraversalsource[standardjanusgraph[inmemory:[127.0.0.1]], standard] When Gremlin Server runs with the ConfigurationManagementGraph, connecting with the remote client will not cause a log line to appear. Also not that you do not need to overwrite the conf/gremlin-server/gremlin-server.yaml file, but that you can do: |
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My understanding is that gremlin Server does not show the following logs when it is started using /gremlin-server-configuration.yaml, Or when a Java client connects to it. I now start Gremlin Server this way When gremlin Server is started using /gremlin-server-configuration.yaml This is another verbose log (DEBUG)，I'm not sure this log is helpful for your judgment. conf/log4j-server.properties When gremlin Server is started using /gremlin-server-cql-es.yaml |
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I don't think you can expect logs at moment, if a traversal is binded. We should be able to add a log with any problem. |
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I am glad a Maintainer is interested in this issue, Thank you for your reading and suggestions! I inferred from the following example that I did not bind the remote session to the instance in Java, That is, All scripts will not be sent to Gremlin Server , Not sending to a remote server may be the root cause. But I'm not sure if the data supports my conclusion. Even if yes, I don't know the solution. Use the Dynamic Graphs prerequisite I think the previous information is sufficient to prove that I meet the requirements for use the Dynamic Graphs prerequisite. There may be only one solution for implementing dynamic graphs in Java, but JanusGraph is only a passing glance. I admire open source workers, and I want to be that person. I don't have the ability yet. |
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OK, this was confusing and could have benefitted from clearer thinking on my side. The difference between running the ConfiguredGraphFactory code in Gremlin Console and in a java gremlin client, is that Gremlin Console does some trickery to run all groovy code remotely after the withRemote method call. The java gremlin client, however, tries to run the ConfiguredGraphFactory code locally. No time to look into this right now, but the obvious workaround seems to use the procedures described in https://tinkerpop.apache.org/docs/current/reference/#gremlin-java-scripts. I guess, though, that understanding the root cause is most important for you now. |
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yeah! I couldn't agree more with you.He uses Thank you for your help. The world is better because of you！ |
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OK, this was confusing and could have benefitted from clearer thinking on my side. The difference between running the ConfiguredGraphFactory code in Gremlin Console and in a java gremlin client, is that Gremlin Console does some trickery to run all groovy code remotely after the withRemote method call. The java gremlin client, however, tries to run the ConfiguredGraphFactory code locally. No time to look into this right now, but the obvious workaround seems to use the procedures described in https://tinkerpop.apache.org/docs/current/reference/#gremlin-java-scripts. I guess, though, that understanding the root cause is most important for you now.