if (response.hasFailures()) {
                throw new SearchEngineClientException(response.buildFailureMessage());
            }
            return true;
        } catch (final InterruptedException e) {
            throw new InterruptedRuntimeException(e);
        } catch (final ExecutionException e) {
            throw new SearchEngineClientException("Failed to update bulk data.", e);
        }
    }

    /**

import org.apache.lucene.search.TotalHits;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.opensearch.client.SearchEngineClient;
import org.codelibs.fess.opensearch.client.SearchEngineClientException;
import org.codelibs.fess.thumbnail.ThumbnailManager;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.DocList;
import org.codelibs.fess.util.MemoryUtil;