Name: janusgraph-utils
Owner: International Business Machines
Description: Develop a graph database app using JanusGraph
Created: 2017-04-23 08:56:06.0
Updated: 2018-05-23 04:36:48.0
Pushed: 2018-05-01 23:40:12.0
Homepage: https://developer.ibm.com/code/patterns/develop-graph-database-app-using-janusgraph/
Size: 832
Language: Java
GitHub Committers
| User | Most Recent Commit | # Commits |
|---|
Other Committers
| User | Most Recent Commit | # Commits |
|---|
This Code Pattern contains sample data and code for running a Twitter-like application in JanusGraph. The utility code illustrates how to use OLTP APIs to define schema, ingest data, and query graph. Developers can use or modify the code to build and operate their custom graph applications, or create similar java and groovy files to interact with JanusGraph.
When the reader has completed this Code Pattern, they will understand how to:
Prerequisites: Install and configure JanusGraph, Cassandra, ElasticSearch, janusgraph-utils
NOTE: These prerequisites can be installed on one server. The instructions are written for Cassandra 3.10 and ElasticSearch 5.3.0 on Linux. Newer versions should work, but might not have been tested. The folder structures on Mac can be different. Check Cassandra and ElasticSearch official documentations for details.
Install Cassandra 3.10 on the storage server. Make the following changes in /etc/cassandra/cassandra.yaml and restart Cassandra.
t_rpc: true
address: 0.0.0.0
port: 9160
dcast_rpc_address: x.x.x.x (your storage server ip)
Install ElasticSearch 5.3.0 on the index server. Make the following changes in /etc/elasticsearch/elasticsearch.yml and restart ElasticSearch.
ork.host: x.x.x.x (your index server ip)
Install JanusGraph on the graph server:
git clone https://github.com/JanusGraph/janusgraph.gitjanusgraph folder:checkout 4609b6731a01116e96e554140b37ad589f0ae0ca
clean install -DskipTests=true
onf/janusgraph-cassandra-es.properties conf/janusgraph-cql-es.properties
age.backend=cql
age.hostname=x.x.x.x (your storage server ip)
x.search.hostname=x.x.x.x (your index server ip)
Install a REST client, such as RESTClient add-on for Firefox, on the client machine.
Clone the janusgraph-utils on the graph server and run mvn package.
clone https://github.com/IBM/janusgraph-utils.git
anusgraph-utils/
package
Run the command in janusgraph-utils folder to generate data into /tmp folder.
n.sh gencsv csv-conf/twitter-like-w-date.json /tmp
Modify the generated user file under /tmp so the sample queries will return with data.
-i -e '2s/.*/1,Indiana Jones/' /tmp/User.csv
A graph schema can be loaded from either the Gremlin console or a java utility. You can check the
doc doc/users_guide.md for details. Alternatively, just run one command in janusgraph-utils folder to
load schema and import data.
rt JANUSGRAPH_HOME=~/janusgraph
n.sh import ~/janusgraph/conf/janusgraph-cql-es.properties /tmp /tmp/schema.json /tmp/datamapper.json
Configure JanusGraph server by running these commands:
/janusgraph/conf/gremlin-server
/janusgraph-utils/samples/date-helper.groovy ../../scripts
./janusgraph-cql-es.properties janusgraph-cql-es-server.properties
remlin-server.yaml rest-gremlin-server.yaml
Add this line to janusgraph-cql-es-server.properties:
lin.graph=org.janusgraph.core.JanusGraphFactory
Change the following four lines in rest-gremlin-server.yaml:
: x.x.x.x (your server ip)
nelizer: org.apache.tinkerpop.gremlin.server.channel.HttpChannelizer
h: conf/gremlin-server/janusgraph-cql-es-server.properties}
pts: [scripts/empty-sample.groovy,scripts/date-helper.groovy]}}
Start JanusGraph server:
/janusgraph; ./bin/gremlin-server.sh ./conf/gremlin-server/rest-gremlin-server.yaml
Now you can query and update graph data using REST. For example, send REST requests using RESTClient in browser with following:
od: POST
http://x.x.x.x:8182
: {"gremlin":?query_to_run"}
You can find sample search and insert queries in samples/twitter-like-queries.txt.
