| /* |
| * 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.indexing.pcj.fluo.api; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import java.math.BigInteger; |
| import java.util.Iterator; |
| |
| import org.apache.rya.indexing.pcj.fluo.app.query.FluoQueryColumns; |
| |
| import org.apache.fluo.api.client.FluoClient; |
| import org.apache.fluo.api.client.Snapshot; |
| import org.apache.fluo.api.client.scanner.ColumnScanner; |
| |
| /** |
| * Counts the number of RDF Statements that have been loaded into the Fluo app |
| * that have not been processed yet. |
| */ |
| public class CountStatements { |
| |
| /** |
| * Get the number of RDF Statements that have been loaded into the Fluo app |
| * that have not been processed yet. |
| * |
| * @param fluo - The connection to Fluo that will be used to fetch the metadata. (not null) |
| * @return The number of RDF Statements that have been loaded into the Fluo |
| * app that have not been processed yet. |
| */ |
| public BigInteger countStatements(final FluoClient fluo) { |
| checkNotNull(fluo); |
| |
| try(Snapshot sx = fluo.newSnapshot()) { |
| // Limit the scan to the Triples binding set column. |
| final Iterator<ColumnScanner> rows = sx.scanner().fetch(FluoQueryColumns.TRIPLES).byRow().build().iterator(); |
| |
| BigInteger count = BigInteger.valueOf(0L); |
| while(rows.hasNext()) { |
| rows.next(); |
| count = count.add( BigInteger.ONE ); |
| } |
| |
| return count; |
| } |
| } |
| } |