| /** |
| * 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.solr.mapper; |
| |
| import org.apache.storm.tuple.ITuple; |
| import com.google.gson.Gson; |
| import org.apache.solr.client.solrj.SolrClient; |
| import org.apache.solr.client.solrj.SolrRequest; |
| import org.apache.solr.client.solrj.impl.CloudSolrClient; |
| import org.apache.solr.client.solrj.request.ContentStreamUpdateRequest; |
| import org.apache.solr.common.util.ContentStream; |
| import org.apache.solr.common.util.ContentStreamBase; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.List; |
| |
| public class SolrJsonMapper implements SolrMapper { |
| private static final Logger logger = LoggerFactory.getLogger(SolrJsonMapper.class); |
| private static final String CONTENT_TYPE = "application/json"; |
| |
| private final String jsonUpdateUrl; |
| private final String jsonTupleField; |
| private final String collection; |
| |
| public static class Builder { |
| private String jsonUpdateUrl = "/update/json/docs"; |
| private final String jsonTupleField; |
| private final String collection; |
| |
| /** |
| * {@link SolrJsonMapper} builder class. |
| * @param collection Name of the Solr collection to update using the SolrRequest |
| * @param jsonTupleField Name of the tuple field that contains the JSON object used to update the Solr index |
| */ |
| public Builder(String collection, String jsonTupleField) { |
| this.collection = collection; |
| this.jsonTupleField = jsonTupleField; |
| } |
| |
| /** |
| * {@link SolrJsonMapper} builder class. |
| * @param solrClient {@link SolrClient} implementation from where to extract the default Solr collection, if any defined. |
| * @param jsonTupleField Name of the tuple field that contains the JSON object used to update the Solr index |
| * This doesn't work in secure mode, in secure mode we need to pass the collection |
| */ |
| public Builder(SolrClient solrClient, String jsonTupleField) { |
| String defaultCollection = null; |
| if (solrClient instanceof CloudSolrClient) { |
| defaultCollection = ((CloudSolrClient) solrClient).getDefaultCollection(); |
| } |
| this.collection = defaultCollection; |
| this.jsonTupleField = jsonTupleField; |
| } |
| |
| /** |
| * Sets the URL endpoint where to send {@link SolrRequest} requests in JSON format. This URL is defined |
| * by Solr and for the most part you will not have to call this method to to override this value. |
| * Currently the default value is /update/json/docs. |
| * This method is available to support future evolutions of the Solr API. |
| * |
| * @param jsonUpdateUrl URL endpoint to where send {@link SolrRequest} |
| * @return {@link Builder object} used to build instances of {@link SolrJsonMapper} |
| */ |
| public Builder setJsonUpdateUrl(String jsonUpdateUrl) { |
| this.jsonUpdateUrl = jsonUpdateUrl; |
| return this; |
| } |
| |
| public SolrJsonMapper build() { |
| return new SolrJsonMapper(this); |
| } |
| } |
| |
| private SolrJsonMapper(Builder builder) { |
| jsonTupleField = builder.jsonTupleField ; |
| collection = builder.collection; |
| jsonUpdateUrl = builder.jsonUpdateUrl; |
| } |
| |
| @Override |
| public String getCollection() { |
| return collection; |
| } |
| |
| /** |
| * |
| * @param tuples |
| * @return |
| * @throws SolrMapperException if the tuple does not contain the |
| */ |
| @Override |
| public SolrRequest toSolrRequest(List<? extends ITuple> tuples) throws SolrMapperException { |
| final String jsonList = getJsonFromTuples(tuples); |
| return createtSolrRequest(jsonList); |
| } |
| |
| @Override |
| public SolrRequest toSolrRequest(ITuple tuple) throws SolrMapperException { |
| final String json = getJsonFromTuple(tuple); |
| return createtSolrRequest(json); |
| } |
| |
| private SolrRequest createtSolrRequest(String json) { |
| final ContentStreamUpdateRequest request = new ContentStreamUpdateRequest(jsonUpdateUrl); |
| final ContentStream cs = new ContentStreamBase.StringStream(json, CONTENT_TYPE); |
| request.addContentStream(cs); |
| if (logger.isDebugEnabled()) { |
| logger.debug("Request generated with JSON: " + json); |
| } |
| return request; |
| } |
| |
| // Builds a JSON list |
| private String getJsonFromTuples(List<? extends ITuple> tuples) throws SolrMapperException { |
| final StringBuilder jsonListBuilder = new StringBuilder("["); |
| for (ITuple tuple : tuples) { |
| final String json = getJsonFromTuple(tuple); |
| jsonListBuilder.append(json).append(","); |
| } |
| jsonListBuilder.setCharAt(jsonListBuilder.length() - 1, ']'); |
| return jsonListBuilder.toString(); |
| } |
| |
| private String getJsonFromTuple(ITuple tuple) throws SolrMapperException { |
| String json = ""; |
| if (tuple.contains(jsonTupleField)) { |
| json = doGetJson(tuple.getValueByField(jsonTupleField)); |
| } else { |
| throw new SolrMapperException("Tuple does not contain JSON object"); |
| } |
| return json; |
| } |
| |
| private String doGetJson(Object value) { |
| String json = ""; |
| if (value instanceof String) { |
| json = (String) value; // Object associated with JSON field is already JSON |
| } else { |
| Gson gson = new Gson(); |
| json = gson.toJson(value); // Serializes a Java object to JSON |
| } |
| return json; |
| } |
| } |