Examples of org.grouplens.lenskit.inject.RecommenderInstantiator.instantiate()

Class org.grouplens.lenskit.inject.RecommenderInstantiator

Examples of org.grouplens.lenskit.inject.RecommenderInstantiator.instantiate()

org.grouplens.lenskit.inject.RecommenderInstantiator.instantiate()
Instantiate the recommender graph. This requires the graph to have been resolved with a real DAO instance, not just a class, if anything references the DAO. Use {@link LenskitConfiguration#buildGraph()} to get such a graph. @return A new recommender graph with all shareable nodes pre-instantiated. @throws RecommenderBuildException If there is an error instantiating the graph.

        logger.debug("Starting recommender build");
        DAGNode<Component, Dependency> graph;
        if (cache == null) {
            logger.debug("Building directly without a cache");
            RecommenderInstantiator ri = RecommenderInstantiator.create(recommenderGraph);
            graph = ri.instantiate();
        } else {
            logger.debug("Instantiating graph with a cache");
            try {
                Set<DAGNode<Component, Dependency>> nodes = GraphtUtils.getShareableNodes(recommenderGraph);
                logger.debug("resolving {} nodes", nodes.size());

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        try {
            inst = RecommenderInstantiator.create(rgb.buildGraph());
        } catch (ResolutionException e) {
            throw new RecommenderBuildException("Cannot resolve recommender graph", e);
        }
        DAGNode<Component, Dependency> graph = inst.instantiate();


        graph = rewriteGraph(graph);


        boolean instantiable = GraphtUtils.getPlaceholderNodes(graph).isEmpty();
        return new LenskitRecommenderEngine(graph, instantiable);

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