| /** |
| * 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.trident.state; |
| |
| import com.google.common.collect.Lists; |
| |
| import java.io.Serializable; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.commons.lang.Validate; |
| import org.apache.storm.mongodb.common.MongoDbClient; |
| import org.apache.storm.mongodb.common.QueryFilterCreator; |
| import org.apache.storm.mongodb.common.mapper.MongoLookupMapper; |
| import org.apache.storm.mongodb.common.mapper.MongoMapper; |
| import org.apache.storm.topology.FailedException; |
| import org.apache.storm.trident.operation.TridentCollector; |
| import org.apache.storm.trident.state.State; |
| import org.apache.storm.trident.tuple.TridentTuple; |
| import org.apache.storm.tuple.Values; |
| import org.bson.Document; |
| import org.bson.conversions.Bson; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class MongoState implements State { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(MongoState.class); |
| |
| private Options options; |
| private MongoDbClient mongoClient; |
| private Map<String, Object> map; |
| |
| protected MongoState(Map<String, Object> map, Options options) { |
| this.options = options; |
| this.map = map; |
| } |
| |
| public static class Options implements Serializable { |
| private String url; |
| private String collectionName; |
| private MongoMapper mapper; |
| private MongoLookupMapper lookupMapper; |
| private QueryFilterCreator queryCreator; |
| |
| public Options withUrl(String url) { |
| this.url = url; |
| return this; |
| } |
| |
| public Options withCollectionName(String collectionName) { |
| this.collectionName = collectionName; |
| return this; |
| } |
| |
| public Options withMapper(MongoMapper mapper) { |
| this.mapper = mapper; |
| return this; |
| } |
| |
| public Options withMongoLookupMapper(MongoLookupMapper lookupMapper) { |
| this.lookupMapper = lookupMapper; |
| return this; |
| } |
| |
| public Options withQueryFilterCreator(QueryFilterCreator queryCreator) { |
| this.queryCreator = queryCreator; |
| return this; |
| } |
| } |
| |
| protected void prepare() { |
| Validate.notEmpty(options.url, "url can not be blank or null"); |
| Validate.notEmpty(options.collectionName, "collectionName can not be blank or null"); |
| |
| this.mongoClient = new MongoDbClient(options.url, options.collectionName); |
| } |
| |
| @Override |
| public void beginCommit(Long txid) { |
| LOG.debug("beginCommit is noop."); |
| } |
| |
| @Override |
| public void commit(Long txid) { |
| LOG.debug("commit is noop."); |
| } |
| |
| /** |
| * Update Mongo state. |
| * @param tuples trident tuples |
| * @param collector trident collector |
| */ |
| public void updateState(List<TridentTuple> tuples, TridentCollector collector) { |
| List<Document> documents = Lists.newArrayList(); |
| for (TridentTuple tuple : tuples) { |
| Document document = options.mapper.toDocument(tuple); |
| documents.add(document); |
| } |
| |
| try { |
| this.mongoClient.insert(documents, true); |
| } catch (Exception e) { |
| LOG.warn("Batch write failed but some requests might have succeeded. Triggering replay.", e); |
| throw new FailedException(e); |
| } |
| } |
| |
| /** |
| * Batch retrieve values. |
| * @param tridentTuples trident tuples |
| * @return values |
| */ |
| public List<List<Values>> batchRetrieve(List<TridentTuple> tridentTuples) { |
| List<List<Values>> batchRetrieveResult = Lists.newArrayList(); |
| try { |
| for (TridentTuple tuple : tridentTuples) { |
| Bson filter = options.queryCreator.createFilter(tuple); |
| Document doc = mongoClient.find(filter); |
| List<Values> values = options.lookupMapper.toTuple(tuple, doc); |
| batchRetrieveResult.add(values); |
| } |
| } catch (Exception e) { |
| LOG.warn("Batch get operation failed. Triggering replay.", e); |
| throw new FailedException(e); |
| } |
| return batchRetrieveResult; |
| } |
| } |