| /** |
| * 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.storm.mongodb.common; |
| |
| import com.mongodb.MongoClient; |
| import com.mongodb.MongoClientURI; |
| import com.mongodb.client.MongoCollection; |
| import com.mongodb.client.MongoDatabase; |
| import com.mongodb.client.model.InsertManyOptions; |
| import com.mongodb.client.model.UpdateOptions; |
| |
| import java.util.List; |
| |
| import org.bson.Document; |
| import org.bson.conversions.Bson; |
| |
| public class MongoDbClient { |
| |
| private MongoClient client; |
| private MongoCollection<Document> collection; |
| |
| /** |
| * The MongoDbClient constructor. |
| * @param url The Mongo server url |
| * @param collectionName The Mongo collection to read/write data |
| */ |
| public MongoDbClient(String url, String collectionName) { |
| //Creates a MongoURI from the given string. |
| MongoClientURI uri = new MongoClientURI(url); |
| //Creates a MongoClient described by a URI. |
| this.client = new MongoClient(uri); |
| //Gets a Database. |
| MongoDatabase db = client.getDatabase(uri.getDatabase()); |
| //Gets a collection. |
| this.collection = db.getCollection(collectionName); |
| } |
| |
| /** |
| * Inserts one or more documents. |
| * This method is equivalent to a call to the bulkWrite method. |
| * The documents will be inserted in the order provided, |
| * stopping on the first failed insertion. |
| * |
| * @param documents documents |
| */ |
| public void insert(List<Document> documents, boolean ordered) { |
| InsertManyOptions options = new InsertManyOptions(); |
| if (!ordered) { |
| options.ordered(false); |
| } |
| collection.insertMany(documents, options); |
| } |
| |
| /** |
| * Update a single or all documents in the collection according to the specified arguments. |
| * When upsert set to true, the new document will be inserted if there are no matches to the query filter. |
| * |
| * @param filter Bson filter |
| * @param document Bson document |
| * @param upsert a new document should be inserted if there are no matches to the query filter |
| * @param many whether find all documents according to the query filter |
| */ |
| public void update(Bson filter, Bson document, boolean upsert, boolean many) { |
| //TODO batch updating |
| UpdateOptions options = new UpdateOptions(); |
| if (upsert) { |
| options.upsert(true); |
| } |
| if (many) { |
| collection.updateMany(filter, document, options); |
| } else { |
| collection.updateOne(filter, document, options); |
| } |
| } |
| |
| /** |
| * Finds a single document in the collection according to the specified arguments. |
| * |
| * @param filter Bson filter |
| */ |
| public Document find(Bson filter) { |
| //TODO batch finding |
| return collection.find(filter).first(); |
| } |
| |
| /** |
| * Closes all resources associated with this instance. |
| */ |
| public void close() { |
| client.close(); |
| } |
| |
| } |