GraphStore is an in-memory graph structure implementation written in Java. It's designed to be powerful, efficient and robust. It's powering the Gephi software and supports large graphs in intensive applications.

• Blazing fast graph data structure optimized for reading and writing
• Comprehensive APIs to read and modify the graph structure
• Low memory footprint - reduced usage of Java objects and collections optimized for caching
• Supports directed, undirected and mixed graphs
• Supports parallel edges (i.e. edges can have a label)
• Any number of attributes can be associated with nodes or edges
• Thread-safe - Implements read-write locking mechanism to allow multiple reading threads
• Supports dynamic graphs (graphs over time)
• Built-in index on attribute values
• Fast and compact binary serialization
• Spatial indexing based on a quadtree

Stable releases can be found on Maven central.

Development builds can be found on Sonatype's Snapshot Repository.

API Documentation is available here.

Follow this QuickStart to get started.

<dependency> <groupId>org.gephi</groupId> <artifactId>graphstore</artifactId> <version>0.8.1</version> </dependency>

compile 'org.gephi:graphstore:0.8.1' 

GraphStore is built for JRE 17+ and depends on FastUtil.

For a complete list of dependencies, consult the pom.xml file.

GraphStore uses Maven for building.

> mvn clean install 

Note that code formatting is automatically applied at that time.

> mvn test 

> mvn jacoco:report 

The source code is available under the Apache 2.0 license. Contributions are welcome.