| /** |
| * 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.pulsar.io.elasticsearch; |
| |
| import java.io.IOException; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.util.Map; |
| |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.http.HttpHost; |
| import org.apache.http.auth.AuthScope; |
| import org.apache.http.auth.UsernamePasswordCredentials; |
| import org.apache.http.client.CredentialsProvider; |
| import org.apache.http.impl.client.BasicCredentialsProvider; |
| import org.apache.pulsar.functions.api.Record; |
| import org.apache.pulsar.io.core.KeyValue; |
| import org.apache.pulsar.io.core.Sink; |
| import org.apache.pulsar.io.core.SinkContext; |
| import org.apache.pulsar.io.core.annotations.Connector; |
| import org.apache.pulsar.io.core.annotations.IOType; |
| import org.elasticsearch.action.DocWriteResponse; |
| import org.elasticsearch.action.admin.indices.create.CreateIndexRequest; |
| import org.elasticsearch.action.admin.indices.create.CreateIndexResponse; |
| import org.elasticsearch.action.admin.indices.get.GetIndexRequest; |
| import org.elasticsearch.action.index.IndexRequest; |
| import org.elasticsearch.action.index.IndexResponse; |
| import org.elasticsearch.client.*; |
| import org.elasticsearch.common.settings.Settings; |
| import org.elasticsearch.common.xcontent.XContentType; |
| |
| /** |
| * The base abstract class for ElasticSearch sinks. |
| * Users need to implement extractKeyValue function to use this sink. |
| * This class assumes that the input will be JSON documents |
| */ |
| @Connector( |
| name = "elastic_search", |
| type = IOType.SINK, |
| help = "A sink connector that sends pulsar messages to elastic search", |
| configClass = ElasticSearchConfig.class |
| ) |
| public class ElasticSearchSink implements Sink<byte[]> { |
| |
| private URL url; |
| private RestHighLevelClient client; |
| private CredentialsProvider credentialsProvider; |
| private ElasticSearchConfig elasticSearchConfig; |
| |
| @Override |
| public void open(Map<String, Object> config, SinkContext sinkContext) throws Exception { |
| elasticSearchConfig = ElasticSearchConfig.load(config); |
| elasticSearchConfig.validate(); |
| createIndexIfNeeded(); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| client.close(); |
| } |
| |
| @Override |
| public void write(Record<byte[]> record) { |
| KeyValue<String, byte[]> keyValue = extractKeyValue(record); |
| IndexRequest indexRequest = Requests.indexRequest(elasticSearchConfig.getIndexName()); |
| indexRequest.type(elasticSearchConfig.getTypeName()); |
| indexRequest.source(keyValue.getValue(), XContentType.JSON); |
| |
| try { |
| IndexResponse indexResponse = getClient().index(indexRequest, RequestOptions.DEFAULT); |
| if (indexResponse.getResult().equals(DocWriteResponse.Result.CREATED)) { |
| record.ack(); |
| } else { |
| record.fail(); |
| } |
| } catch (final IOException ex) { |
| record.fail(); |
| } |
| } |
| |
| public KeyValue<String, byte[]> extractKeyValue(Record<byte[]> record) { |
| String key = record.getKey().orElse(""); |
| return new KeyValue<>(key, record.getValue()); |
| } |
| |
| private void createIndexIfNeeded() throws IOException { |
| GetIndexRequest request = new GetIndexRequest(); |
| request.indices(elasticSearchConfig.getIndexName()); |
| boolean exists = getClient().indices().exists(request, RequestOptions.DEFAULT); |
| |
| if (!exists) { |
| CreateIndexRequest cireq = new CreateIndexRequest(elasticSearchConfig.getIndexName()); |
| |
| cireq.settings(Settings.builder() |
| .put("index.number_of_shards", elasticSearchConfig.getIndexNumberOfShards()) |
| .put("index.number_of_replicas", elasticSearchConfig.getIndexNumberOfReplicas())); |
| |
| CreateIndexResponse ciresp = getClient().indices().create(cireq, RequestOptions.DEFAULT); |
| if (!ciresp.isAcknowledged() || !ciresp.isShardsAcknowledged()) { |
| throw new RuntimeException("Unable to create index."); |
| } |
| } |
| } |
| |
| private URL getUrl() throws MalformedURLException { |
| if (url == null) { |
| url = new URL(elasticSearchConfig.getElasticSearchUrl()); |
| } |
| return url; |
| } |
| |
| private CredentialsProvider getCredentialsProvider() { |
| |
| if (StringUtils.isEmpty(elasticSearchConfig.getUsername()) |
| || StringUtils.isEmpty(elasticSearchConfig.getPassword())) { |
| return null; |
| } |
| |
| credentialsProvider = new BasicCredentialsProvider(); |
| credentialsProvider.setCredentials(AuthScope.ANY, |
| new UsernamePasswordCredentials(elasticSearchConfig.getUsername(), |
| elasticSearchConfig.getPassword())); |
| return credentialsProvider; |
| } |
| |
| private RestHighLevelClient getClient() throws MalformedURLException { |
| if (client == null) { |
| CredentialsProvider cp = getCredentialsProvider(); |
| RestClientBuilder builder = RestClient.builder(new HttpHost(getUrl().getHost(), |
| getUrl().getPort(), getUrl().getProtocol())); |
| |
| if (cp != null) { |
| builder.setHttpClientConfigCallback(httpClientBuilder -> |
| httpClientBuilder.setDefaultCredentialsProvider(cp)); |
| } |
| client = new RestHighLevelClient(builder); |
| } |
| return client; |
| } |
| } |