Examples of org.apache.marmotta.kiwi.reasoner.engine.ReasoningEngine

Package org.apache.marmotta.kiwi.reasoner.engine

Examples of org.apache.marmotta.kiwi.reasoner.engine.ReasoningEngine

org.apache.marmotta.kiwi.reasoner.engine.ReasoningEngine
This class implements the evaluation of reasoning programs on the triple store. It has two different modes:
- incremental reasoning: when new triples are added or old triples are removed, the inferred information is updated accordingly
- full reasoning: (re-)runs the reasoning process over all triples currently contained in the triple store
Since reasoning can require some time, the actual execution of incremental reasonong is implemented in a producer-consumer style. When new transaction data is available, it is added to a queue. A separate reasoning thread then takes new transaction data and processes the rules asynchronously.
The reasoning engine uses its own connection to the database to carry out reasoning tasks.
TODO: we need to clarify conceptually whether it would be correct to run several reasoner threads in parallel. In theory, reasoning here is strictly monotonic so there should not be a problem. In practice, we might miss certain triples because the order of transactions might be messed up. Maybe it makes more sense to parallelize the execution or rules instead.
User: Sebastian Schaffert (sschaffert@apache.org)

        } finally {
            connection.close();
        }


        // instantiate reasoning engine, will load the programs into memory
        engine = new ReasoningEngine(rpersistence,tsail,new ReasoningConfiguration());


    }

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                try {
                    persistence = new KiWiReasoningPersistence(store.getPersistence(), getValueFactory());
                    persistence.initDatabase();


                    engine      = new ReasoningEngine(persistence,this,config);
                    addTransactionListener(engine);


                    initialized = true;
                } catch (SQLException e) {
                    log.error("error initializing reasoning database",e);

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        } finally {
            connection.close();
        }


        // instantiate reasoning engine, will load the programs into memory
        engine = new ReasoningEngine(rpersistence,tsail,new ReasoningConfiguration());


    }

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                try {
                    persistence = new KiWiReasoningPersistence(store.getPersistence(), getValueFactory());
                    persistence.initDatabase();


                    engine      = new ReasoningEngine(persistence,this,config);
                    addTransactionListener(engine);


                    initialized = true;
                } catch (SQLException e) {
                    log.error("error initializing reasoning database",e);

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        } finally {
            connection.close();
        }


        // instantiate reasoning engine, will load the programs into memory
        engine = new ReasoningEngine(rpersistence,tsail,new ReasoningConfiguration());


    }

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