Ogre

Ogre is a Clojure Gremlin Language Variant of the Gremlin graph traversal language from Apache Tinkerpop. Like Gremlin, it can be used to query any graphs that are TinkerPop-enabled.

Project Goals

• Provide an API that enhances the expressivity of Gremlin when working in Clojure.
• Expose the features of TinkerPop as it makes sense in Clojure.
• Don't introduce any significant amount of performance overhead.

Community

Questions related to Ogre can be asked on the clojure-titanium mailing list.

To subscribe for announcements of releases, important changes and so on, please follow @ClojureWerkz on Twitter.

Project Maturity

Despite being first released in 2014, Orge is a relatively young project that regained active development in 2016. We are targeting Gremlin 3.2.0 development releases.

Artifacts

Orge artifacts are released to Clojars. Maven users should add the following repository definition to your pom.xml:

<repository>
  <id>clojars.org</id>
  <url>http://clojars.org/repo</url>
</repository>

The Most Recent Release

With Leiningen:

[clojurewerkz/ogre "3.0.0.0-beta2"]

With Maven:

<dependency>
  <groupId>clojurewerkz</groupId>
  <artifactId>ogre</artifactId>
  <version>3.0.0.0-beta2</version>
</dependency>

Documentation & Examples

clojurewerkz.ogre.core=> (def graph (open-graph))
#'clojurewerkz.ogre.core/graph
clojurewerkz.ogre.core=> (def g (traversal graph))
#'clojurewerkz.ogre.core/g
clojurewerkz.ogre.core=> (org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerFactory/generateModern graph)
nil
clojurewerkz.ogre.core=> (traverse g V (match
                    #_=>   (__ (as :a) (out :created) (as :b))
                    #_=>   (__ (as :b) (has :name "lop"))
                    #_=>   (__ (as :b) (in :created) (as :c))
                    #_=>   (__ (as :c) (has :age 29)))
                    #_=>   (select :a :c) (by :name)
                    #_=>   (into-seq!))
({"a" "marko", "c" "marko"} {"a" "josh", "c" "marko"} {"a" "peter", "c" "marko"})

Supported Clojure Versions

Orge requires Clojure 1.6+. The most recent stable release is always recommended.

Continuous Integration

Development

Orge uses Leiningen 2. Once installed and run tests against supported Clojure versions using:

lein all test

License

Copyright (C) 2014-2016 Zack Maril, and the ClojureWerkz team.

Licensed under the Eclipse Public License (the same as Clojure).

Acknowledgements

Joe Lee illustrated the "Gremlin Ogre" image based on the original Clojurewerkz Ogre logo and Apache TinkerPop's Gremlin character developed Ketrina Yim.