Github user rvesse commented on a diff in the pull request:
https://github.com/apache/jena/pull/426#discussion_r192680996
--- Diff:
jena-db/jena-tdb2/src/main/java/org/apache/jena/tdb2/loader/parallel/LoaderPlan.java
---
@@ -0,0 +1,57 @@
+/*
+ * 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.jena.tdb2.loader.parallel;
+
+import org.apache.jena.tdb2.store.NodeId;
+
+/**
+ * A {@code LoaderPlan}
+ * <p>
+ * For triples and for quads there is a first phase to parse the input,
+ * convert to tuples of {@link NodeId NodeIds}, including allocating the
ids,
+ * and do at least one tuple index for each of triples quads to capture
the input.
+ * <p>
+ * After that, a number of phases builds the other indexes.
+ * <p>
+ * The {@code mulithreadedInput} f;ag indicates whether the first phase is
+ * done in parallel (threads for parer, node table building and primary
indexes)
+ * or as a single threaded process.
+ */
+public class LoaderPlan {
+ private final InputStage dataInput;
+ private final String[] loadGroup3;
+ private final String[] loadGroup4;
+ private final String[][] secondaryGroups3;
+ private final String[][] secondaryGroups4;
+
+ public LoaderPlan(InputStage dataInput,
+ String[] loadGroup3, String[] loadGroup4,
+ String[][] secondaryGroups3, String[][] secondaryGroups4) {
+ this.dataInput = dataInput;
+ this.loadGroup3 = loadGroup3;
+ this.loadGroup4 = loadGroup4;
+ this.secondaryGroups3 = secondaryGroups3;
+ this.secondaryGroups4 = secondaryGroups4;
+ }
+ public InputStage dataInputType() { return dataInput; }
+ public String[] primaryLoad3() { return loadGroup3; }
+ public String[] primaryLoad4() { return loadGroup4; }
+ public String[][] secondaryIndex3() { return secondaryGroups3; }
+ public String[][] secondaryIndex4() { return secondaryGroups4; }
--- End diff --
The naming of these seems somewhat esoteric, I assume that the 3 and 4
refers to Triples and Quads respectively?
---
