ElasticsearchController.java

/*
 * Copyright 2022 Global Crop Diversity Trust
 *
 * Licensed 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.gringlobal.api.admin.v1;

import io.swagger.annotations.Api;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.cluster.metadata.AliasMetaData;
import org.gringlobal.api.v1.ApiBaseController;
import org.gringlobal.component.elastic.ElasticReindex;
import org.gringlobal.service.ElasticsearchService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.task.TaskExecutor;
import org.springframework.http.MediaType;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.BlockingQueue;

@RestController("elasticSearchApi1")
@PreAuthorize("hasAuthority('GROUP_ADMINS')")
@RequestMapping(ElasticsearchController.API_URL)
@Api(tags = { "elasticv1" })
@Slf4j
public class ElasticsearchController {

	/** The Constant API_URL. */
	public static final String API_URL = ApiBaseController.APIv1_BASE + "/admin/elastic";

	@Autowired(required = false)
	private ElasticsearchService elasticsearchService;

	@Resource
	private BlockingQueue<ElasticReindex> elasticReindexQueue;

	@Autowired
	private TaskExecutor taskExecutor;

	@GetMapping(value = "", produces = { MediaType.APPLICATION_JSON_VALUE })
	public IndexResponse getIndexResponse() throws IOException {

		IndexResponse indexResponse = new IndexResponse();
		var listIndicesResponse = elasticsearchService.listIndices();

		Map<String, List<AliasMetaData>> aliases = new HashMap<>();
		if (listIndicesResponse != null) {
			aliases = listIndicesResponse.getAliases();
		}
		indexResponse.indexes = aliases;
		indexResponse.reindexTypes = createReindexTypesMap();
		indexResponse.updateQueueSize = elasticReindexQueue.size();
		return indexResponse;
	}

	@PostMapping(value = "/reindex")
	public void reindexElasticContent(@RequestParam(value = "type") String type) {

		if (elasticReindexQueue.size() > 0) {
			throw new RuntimeException("Reindex queue not empty or operation is locked! Unable to run new indexing.");
		}

		if (type.equals("All")) {
			taskExecutor.execute(() -> {
				try {
					log.warn("Reindexing EVERYTHING!!!");
					elasticsearchService.reindexAll();
				} catch (Throwable e) {
					log.error("Error executing reindexAll", e);
				}
			});
		} else {
			taskExecutor.execute(() -> {
				try {
					log.warn("Reindexing {}", type);
					elasticsearchService.reindex(Class.forName(type));
				} catch (Throwable e) {
					log.error("Error executing reindex of " + type, e);
				}
			});
		}

	}

	@PostMapping(value = "/realias")
	public void moveAlias(@RequestParam(name = "aliasName") String aliasName, @RequestParam(name = "indexName") String indexName) {
		elasticsearchService.realias(aliasName, null, indexName);
	}

	@PostMapping(value = "/delete-alias/{name}")
	public void deleteAlias(@PathVariable(name = "name") String aliasName) {
		elasticsearchService.deleteAlias(aliasName);
	}

	@PostMapping(value = "/delete-index/{name}")
	public void deleteIndex(@PathVariable(name = "name") String indexName) {
		elasticsearchService.deleteIndex(indexName);
	}

	public static class IndexResponse {
		public Map<String, List<AliasMetaData>> indexes;
		public Map<String, String> reindexTypes;
		public int updateQueueSize;
	}

	private Map<String, String> createReindexTypesMap() {
		Map<String, String> reindexTypesMap = new HashMap<>();
		for (Class<?> clazz : elasticsearchService.getIndexedEntities()) {
			reindexTypesMap.put(clazz.getSimpleName(), clazz.getName());
		}
		return reindexTypesMap;
	}

}