kparmar1 / snomed-boot

Snomed Boot

An extensible Java framework for loading SNOMED CT RF2 content into any implementation.

Key Features

• Extensible factory based design
• Supports component streaming for better overall performance and less pressure on memory
• Ability to load only the latest version of each component when using a collection of snapshot archives
• Multithreaded
  • Concepts load first
  • Then Relationships and Descriptions load in parallel
  • Then all reference set memebers in parallel.
• Loading Profiles allow content to be filtered
  • by content type
  • by reference set filename pattern
  • by reference set identifier

Component Factories

This project is oriented around the ComponentFactory and HistoryAwareComponentFactory. These interfaces allow a factory implementation to recieve the properties of every component and member. The HistoryAwareComponentFactory is useful when loading full files containing more than one release.

In-Memory Implementation

The default factory implementation loads content into memory. It builds a map of concepts with their descriptions and relationships connected. This is an extremely fast way to get hold the transitive closure for every concept.

// Create release importer
ReleaseImporter releaseImporter = new ReleaseImporter();

// Load SNOMED CT components into memory
ComponentStore componentStore = new ComponentStore();
releaseImporter.loadSnapshotReleaseFiles("release/SnomedCT_RF2Release_INT_20170131", LoadingProfile.light, new ComponentFactoryImpl(componentStore));
Map<Long, ? extends Concept> conceptMap = componentStore.getConcepts();

// Get transitive closure for concept 285355007 | Blood blister (disorder) |
Set<Long> transitiveClosure = conceptMap.get("285355007").getInferredAncestorIds();

Contribute

We welcome your suggestions and contributions. Feel free to fork this project and submit a pull request of your changes.