Пример #1
0
        public void SparqlRemoteEndpointMemoryLeak1()
        {
            /*
             * Dim endpoint = New SparqlRemoteEndpoint(New Uri("http://localhost:8080/sesame/repositories/my_repo"))
             * Dim queryString As SparqlParameterizedString = New SparqlParameterizedString()
             * queryString.Namespaces.AddNamespace("annot", New Uri(oAppSettingsReader.GetValue("BaseUriSite", GetType(System.String)) & "/annotations.owl#"))
             * queryString.CommandText = "SELECT DISTINCT ?text WHERE {?annotation annot:onContent <" & _uriDocument & "> ; annot:onContentPart """ & ContentPart & """ ; annot:text ?text ; annot:isValid ""false""^^xsd:boolean . }"
             * Dim results As SparqlResultSet = endpoint.QueryWithResultSet(queryString.ToString)
             * For Each result As SparqlResult In results
             * Console.WriteLine(DirectCast(result.Value("text"), LiteralNode).Value)
             * Next
             * results.Dispose()
             */

            //Do a GC before attempting the test
            GC.GetTotalMemory(true);

            //First off make sure to load some data into the some
            SparqlRemoteUpdateEndpoint updateEndpoint = RemoteEndpoints.GetUpdateEndpoint();

            updateEndpoint.Update("DROP ALL; INSERT DATA { <http://subject> <http://predicate> <http://object> . }");

            int totalRuns = 10000;

            //Loop over making queries to try and reproduce the memory leak
            for (int i = 1; i <= totalRuns; i++)
            {
                SparqlRemoteEndpoint      endpoint    = RemoteEndpoints.GetQueryEndpoint();
                SparqlParameterizedString queryString = new SparqlParameterizedString();
                queryString.CommandText = "SELECT * WHERE { ?s ?p ?o }";

                SparqlResultSet results = endpoint.QueryWithResultSet(queryString.ToString());
                Assert.Equal(1, results.Count);
                foreach (SparqlResult result in results)
                {
                    //We're just iterating to make sure we touch the whole of the results
                }
                results.Dispose();

                if (i % 500 == 0)
                {
                    Debug.WriteLine("Memory Usage after " + i + " Iterations: " + Process.GetCurrentProcess().PrivateMemorySize64);
                }
            }
            Debug.WriteLine("Memory Usage after " + totalRuns + " Iterations: " + Process.GetCurrentProcess().PrivateMemorySize64);
        }