code: /*
   * 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.skywalking.library.elasticsearch.client;
  
  import com.linecorp.armeria.client.WebClient;
  import com.linecorp.armeria.common.HttpData;
  import com.linecorp.armeria.common.HttpStatus;
  import com.linecorp.armeria.common.util.Exceptions;
  import java.io.InputStream;
  import java.util.concurrent.CompletableFuture;
  import lombok.RequiredArgsConstructor;
  import lombok.SneakyThrows;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.skywalking.library.elasticsearch.ElasticSearchVersion;
  import org.apache.skywalking.library.elasticsearch.requests.search.Scroll;
  import org.apache.skywalking.library.elasticsearch.requests.search.Search;
  import org.apache.skywalking.library.elasticsearch.requests.search.SearchParams;
  import org.apache.skywalking.library.elasticsearch.response.search.SearchResponse;
  
  @Slf4j
  @RequiredArgsConstructor
  public final class SearchClient {
      private final CompletableFuture<ElasticSearchVersion> version;
  
      private final WebClient client;
  
      @SneakyThrows
      public SearchResponse search(Search criteria,
                                   SearchParams params,
                                   String... index) {
          final CompletableFuture<SearchResponse> future =
              version.thenCompose(
                  v -> client.execute(v.requestFactory().search().search(criteria, params, index))
                             .aggregate().thenApply(response -> {
                          if (response.status() != HttpStatus.OK) {
                              throw new RuntimeException(response.contentUtf8());
                          }
  
                          try (final HttpData content = response.content();
                               final InputStream is = content.toInputStream()) {
                              return v.codec().decode(is, SearchResponse.class);
                          } catch (Exception e) {
                              return Exceptions.throwUnsafely(e);
                          }
                      }));
          future.whenComplete((result, exception) -> {
              if (exception != null) {
                  log.error(
                      "Failed to search, request {}, params {}, index {}",
                      criteria, params, index,
                      exception
                  );
                  return;
              }
              if (log.isDebugEnabled()) {
                  log.debug("Succeeded to search index {}, {}", index, result);
              }
          });
          return future.get();
      }
  
      @SneakyThrows
      public SearchResponse scroll(Scroll scroll) {
          final CompletableFuture<SearchResponse> future =
              version.thenCompose(
                  v -> client.execute(v.requestFactory().search().scroll(scroll))
                             .aggregate().thenApply(response -> {
                          if (response.status() != HttpStatus.OK) {
                              throw new RuntimeException(response.contentUtf8());
                          }
  
                          try (final HttpData content = response.content();
                               final InputStream is = content.toInputStream()) {
                              return v.codec().decode(is, SearchResponse.class);
                          } catch (Exception e) {
                              return Exceptions.throwUnsafely(e);
                          }
                      }));
          future.whenComplete((result, exception) -> {
              if (exception != null) {
                  log.error("Failed to scroll, request {}, {}", scroll, exception);
                  return;
              }
              if (log.isDebugEnabled()) {
                  log.debug("Succeeded to scroll, {}", result);
              }
          });
          return future.get();
      }
  
      @SneakyThrows
      public boolean deleteScrollContext(String scrollId) {
          final CompletableFuture<Boolean> future =
              version.thenCompose(
                  v -> client.execute(v.requestFactory().search().deleteScrollContext(scrollId))
                             .aggregate().thenApply(response -> {
                              if (response.status() == HttpStatus.OK) {
                                  return true;
                              }
                              throw new RuntimeException(response.contentUtf8());
                      }));
          future.whenComplete((result, exception) -> {
              if (exception != null) {
                  log.error("Failed to delete scroll context, request {}, {}", scrollId, exception);
                  return;
              }
              if (log.isDebugEnabled()) {
                  log.debug("Succeeded to delete scroll context, {}", result);
              }
          });
          return future.get();
      }
  }
  