* 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.codelibs.fess.api.engine;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Locale;
import java.util.UUID;

import org.opensearch.common.unit.TimeValue;
import org.opensearch.core.action.ActionListener;
import org.opensearch.core.action.ActionResponse;
import org.opensearch.index.IndexNotFoundException;
import org.opensearch.index.engine.VersionConflictEngineException;
import org.opensearch.index.query.QueryBuilder;
import org.opensearch.search.Scroll;
import org.opensearch.search.SearchHit;
import org.opensearch.threadpool.ThreadPool;

        final HashMap<String, Object> stats = new HashMap<>();
        stats.put("jvm", getJvmObj());
        stats.put("os", getOsObj());
        stats.put("process", getProcessObj());
        stats.put("engine", getEngineObj());
        stats.put("fs", getFsObj());
        return asJson(new ApiStatsResponse().stats(stats).status(ApiResult.Status.OK).result());
    }

    private FsObj[] getFsObj() {