| /* |
| * 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.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| 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.CellScanner; |
| import org.apache.fluo.api.data.RowColumnValue; |
| |
| /** |
| * Finds all queries that are being managed by this instance of Fluo that |
| * are also being exported to the provided instance of Accumulo. |
| */ |
| public class ListQueryIds { |
| |
| /** |
| * Finds all queries that are being managed by this instance of Fluo that |
| * are also being exported to the provided instance of Accumulo. |
| * |
| * @param fluo - The Fluo instance that will be searched. (not null) |
| * @return An ascending alphabetically sorted list of the Query IDs being |
| * managed by the Fluo app and exported to an instance of Accumulo. |
| */ |
| public List<String> listQueryIds(final FluoClient fluo) { |
| checkNotNull(fluo); |
| |
| final List<String> queryIds = new ArrayList<>(); |
| |
| try(Snapshot snap = fluo.newSnapshot() ) { |
| // Create an iterator that iterates over the QUERY_ID column. |
| final CellScanner cellScanner = snap.scanner().fetch( FluoQueryColumns.QUERY_NODE_ID).build(); |
| |
| for (RowColumnValue rcv : cellScanner) { |
| queryIds.add(rcv.getsValue()); |
| //TODO this was doing a snap.get that seemed unnecessary |
| } |
| } |
| |
| // Sort them alphabetically. |
| Collections.sort(queryIds); |
| return queryIds; |
| } |
| } |