| /** |
| * 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.metamodel.elasticsearch.rest; |
| |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| |
| 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.metamodel.ConnectionException; |
| import org.apache.metamodel.DataContext; |
| import org.apache.metamodel.factory.DataContextFactory; |
| import org.apache.metamodel.factory.DataContextProperties; |
| import org.apache.metamodel.factory.ResourceFactoryRegistry; |
| import org.apache.metamodel.factory.UnsupportedDataContextPropertiesException; |
| import org.apache.metamodel.util.SimpleTableDef; |
| import org.elasticsearch.client.RestClient; |
| import org.elasticsearch.client.RestClientBuilder; |
| |
| /** |
| * Factory for ElasticSearch data context of REST type. |
| * |
| * The factory will activate when DataContext type is specified as |
| * "elasticsearch", "es-rest" or "elasticsearch-rest". |
| * |
| * This factory is configured with the following properties: |
| * |
| * <ul> |
| * <li>url (http or https based base URL of elasticsearch)</li> |
| * <li>database (index name)</li> |
| * <li>username (optional)</li> |
| * <li>password (optional)</li> |
| * </ul> |
| */ |
| public class ElasticSearchRestDataContextFactory implements DataContextFactory { |
| |
| @Override |
| public boolean accepts(DataContextProperties properties, ResourceFactoryRegistry resourceFactoryRegistry) { |
| switch (properties.getDataContextType()) { |
| case "elasticsearch": |
| // ensure that the url is http or https based to infer that this is |
| // a REST based connection |
| final String url = properties.getUrl(); |
| return url != null && url.startsWith("http") && acceptsInternal(properties); |
| case "es-rest": |
| case "elasticsearch-rest": |
| return acceptsInternal(properties); |
| } |
| return false; |
| } |
| |
| private boolean acceptsInternal(DataContextProperties properties) { |
| if (properties.getUrl() == null) { |
| return false; |
| } |
| if (getIndex(properties) == null) { |
| return false; |
| } |
| return true; |
| } |
| |
| private ElasticSearchRestClient createClient(final DataContextProperties properties) throws MalformedURLException { |
| final URL url = new URL(properties.getUrl()); |
| final RestClientBuilder builder = RestClient.builder(new HttpHost(url.getHost(), url.getPort())); |
| |
| if (properties.getUsername() != null) { |
| final CredentialsProvider credentialsProvider = new BasicCredentialsProvider(); |
| credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(properties.getUsername(), |
| properties.getPassword())); |
| |
| builder.setHttpClientConfigCallback(httpClientBuilder -> httpClientBuilder.setDefaultCredentialsProvider( |
| credentialsProvider)); |
| } |
| |
| return new ElasticSearchRestClient(builder.build()); |
| } |
| |
| private String getIndex(DataContextProperties properties) { |
| final String databaseName = properties.getDatabaseName(); |
| if (databaseName == null) { |
| properties.toMap().get("index"); |
| } |
| return databaseName; |
| } |
| |
| @Override |
| public DataContext create(DataContextProperties properties, ResourceFactoryRegistry resourceFactoryRegistry) |
| throws UnsupportedDataContextPropertiesException, ConnectionException { |
| try { |
| ElasticSearchRestClient client = createClient(properties); |
| final String indexName = getIndex(properties); |
| final SimpleTableDef[] tableDefinitions = properties.getTableDefs(); |
| return new ElasticSearchRestDataContext(client, indexName, tableDefinitions); |
| } catch (MalformedURLException e) { |
| throw new UnsupportedDataContextPropertiesException(e); |
| } |
| } |
| |
| } |