Example #1
0
  @Override
  public void execute() throws IOException, RecommenderBuildException {
    LenskitConfiguration dataConfig = input.getConfiguration();
    LenskitRecommenderEngineBuilder builder = LenskitRecommenderEngine.newBuilder();
    for (LenskitConfiguration config : environment.loadConfigurations(getConfigFiles())) {
      builder.addConfiguration(config);
    }
    builder.addConfiguration(dataConfig, ModelDisposition.EXCLUDED);

    Stopwatch timer = Stopwatch.createStarted();
    LenskitRecommenderEngine engine = builder.build();
    timer.stop();
    logger.info("built model in {}", timer);
    File output = getOutputFile();
    CompressionMode comp = CompressionMode.autodetect(output);
    logger.info("writing model to {}", output);
    Closer closer = Closer.create();
    try {
      OutputStream stream = closer.register(new FileOutputStream(output));
      stream = closer.register(comp.wrapOutput(stream));
      engine.write(stream);
    } catch (Throwable th) { // NOSONAR using a closer
      throw closer.rethrow(th);
    } finally {
      closer.close();
    }
  }
Example #2
0
 private LenskitRecommenderEngine loadEngine() throws RecommenderBuildException, IOException {
   File modelFile = options.get("model_file");
   if (modelFile == null) {
     logger.info("creating fresh recommender");
     LenskitRecommenderEngineBuilder builder = LenskitRecommenderEngine.newBuilder();
     for (LenskitConfiguration config : environment.loadConfigurations(getConfigFiles())) {
       builder.addConfiguration(config);
     }
     builder.addConfiguration(input.getConfiguration());
     Stopwatch timer = Stopwatch.createStarted();
     LenskitRecommenderEngine engine = builder.build();
     timer.stop();
     logger.info("built recommender in {}", timer);
     return engine;
   } else {
     logger.info("loading recommender from {}", modelFile);
     LenskitRecommenderEngineLoader loader = LenskitRecommenderEngine.newLoader();
     for (LenskitConfiguration config : environment.loadConfigurations(getConfigFiles())) {
       loader.addConfiguration(config);
     }
     loader.addConfiguration(input.getConfiguration());
     Stopwatch timer = Stopwatch.createStarted();
     LenskitRecommenderEngine engine;
     CompressionMode comp = CompressionMode.autodetect(modelFile);
     InputStream input = new FileInputStream(modelFile);
     try {
       input = comp.wrapInput(input);
       engine = loader.load(input);
     } finally {
       input.close();
     }
     timer.stop();
     logger.info("loaded recommender in {}", timer);
     return engine;
   }
 }