Github user jessehatfield commented on a diff in the pull request:
https://github.com/apache/incubator-rya/pull/255#discussion_r160794284
--- Diff:
extras/rya.forwardchain/src/main/java/org/apache/rya/forwardchain/batch/ForwardChainSpinTool.java
---
@@ -0,0 +1,81 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.rya.forwardchain.batch;
+
+import org.apache.hadoop.util.Tool;
+import org.apache.hadoop.util.ToolRunner;
+import org.apache.rya.api.RdfCloudTripleStoreConfiguration;
+import org.apache.rya.forwardchain.ForwardChainException;
+import org.apache.rya.forwardchain.rule.Ruleset;
+import org.apache.rya.forwardchain.rule.SpinConstructRule;
+
+/**
+ * {@link Tool} to load SPIN Construct rules from a Rya data store, then
apply
+ * those rules to the same store using forward-chaining inference
+ * (materialization), adding triples back to Rya until no more information
can
+ * be derived.
+ */
+public class ForwardChainSpinTool extends AbstractForwardChainTool {
+ private Ruleset ruleset;
+
+ /**
+ * Constructor that takes in an {@link
RdfCloudTripleStoreConfiguration}.
+ * @param conf Configuration object containing Rya connection
information.
+ */
+ public ForwardChainSpinTool(RdfCloudTripleStoreConfiguration conf) {
+ setConf(conf);
+ }
+
+ /**
+ * Default constructor that does not take in a configuration object.
Rya
+ * connection details should be provided via an
+ * RdfCloudTripleStoreConfiguration, either using
+ * {@link AbstractForwardChainTool#setConf} or a {@link ToolRunner}.
+ */
+ public ForwardChainSpinTool() { }
+
+ /**
+ * Load SPIN Construct rules from Rya.
+ * @return A set of construct query rules.
+ * @throws ForwardChainException if loading rules from Rya fails.
+ */
+ @Override
+ protected Ruleset getRuleset() throws ForwardChainException {
+ if (ruleset == null) {
+ ruleset = SpinConstructRule.loadSpinRules(getConf());
+ }
+ return ruleset;
+ }
+
+ public static void main(String[] args) throws Exception {
+ long start = System.currentTimeMillis();
+ ForwardChainSpinTool tool = new ForwardChainSpinTool();
+ ToolRunner.run(tool, args);
+ long end = System.currentTimeMillis();
+ double seconds = (end - start) / 1000.0;
+ long inferences = tool.getNumInferences();
+ long rules = tool.getRuleset().getRules().size();
+ System.out.println(String.format("ForwardChainSpinTool: %d rules,
%d inferences, %.3f seconds",
+ rules, inferences, seconds));
+// Properties props = new Properties();
--- End diff --
Done.
---
