JanusGraph Examples
The JanusGraph examples show the basics of how to configure and construct a graph application. It uses Apache Maven to manage the numerous dependencies required to build the application. The common application will:
- Open and initialize the graph
- Define the schema
- Build the graph
- Run traversal queries to get data from the graph
- Make updates to the graph
- Close the graph
By using different graph configurations, the same example code can run against the various supported storage and indexing backends.
Prerequisites
- Java 8 Development Kit, update 40 or higher. Oracle Java and OpenJDK have been tested successfully.
- Apache Maven, version 3.3 or higher
JanusGraph distribution
Download the latest JanusGraph release distribution zip file and unzip it.
Build the examples
The examples are packaged with the JanusGraph distribution zip file in the
examples directory. Run the Maven build command from the examples directory.
mvn clean install
Run the examples
These commands can be run from the examples or project's directory.
Please refer to the specific directions for each project as there may be
additional setup and configuration required.
Common and In-Memory
mvn exec:java -pl :example-common
BerkeleyJE and Lucene
mvn exec:java -pl :example-berkeleyje
Cassandra CQL and Elasticsearch
mvn exec:java -pl :example-cql
HBase and SolrCloud
mvn exec:java -pl :example-hbase
HBase and Solr Standalone (HTTP)
mvn exec:java -pl :example-hbase -Dexample.config="\${project.basedir}/conf/jgex-hbase-solr-http.properties"
Remote Graph
mvn exec:java -pl :example-remotegraph
TinkerGraph
mvn exec:java -pl :example-tinkergraph
Drop the graph
After running an example, you may want to drop the graph from storage. Make
sure to stop the application before dropping the graph. These commands can
be run from the examples or the project's directory, but please refer to
the specific directions for each project as there may be additional steps
for clean up.
BerkeleyJE and Lucene
mvn exec:java -pl :example-berkeleyje -Dcmd=drop
Cassandra CQL and Elasticsearch
mvn exec:java -pl :example-cql -Dcmd=drop
HBase and SolrCloud
mvn exec:java -pl :example-hbase -Dcmd=drop
HBase and Solr Standalone (HTTP)
mvn exec:java -pl :example-hbase -Dexample.config="\${project.basedir}/conf/jgex-hbase-solr-http.properties" -Dcmd=drop