com.yelp.nrtsearch.server.handler.DeleteAllDocumentsHandler Maven / Gradle / Ivy

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/*
 * Copyright 2020 Yelp Inc.
 *
 * 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 com.yelp.nrtsearch.server.handler;

import com.yelp.nrtsearch.server.grpc.*;
import com.yelp.nrtsearch.server.index.IndexState;
import com.yelp.nrtsearch.server.index.ShardState;
import com.yelp.nrtsearch.server.state.GlobalState;
import io.grpc.Status;
import io.grpc.stub.StreamObserver;
import java.io.IOException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DeleteAllDocumentsHandler
    extends Handler {
  private static final Logger logger =
      LoggerFactory.getLogger(DeleteAllDocumentsHandler.class.getName());

  public DeleteAllDocumentsHandler(GlobalState globalState) {
    super(globalState);
  }

  @Override
  public void handle(
      DeleteAllDocumentsRequest deleteAllDocumentsRequest,
      StreamObserver responseObserver) {
    logger.info("Received delete all documents request: {}", deleteAllDocumentsRequest);
    try {
      IndexState indexState = getGlobalState().getIndex(deleteAllDocumentsRequest.getIndexName());
      DeleteAllDocumentsResponse reply = handle(indexState);
      logger.info("DeleteAllDocumentsHandler returned " + reply);
      responseObserver.onNext(reply);
      responseObserver.onCompleted();
    } catch (Exception e) {
      logger.warn(
          "error while trying to deleteAll for index " + deleteAllDocumentsRequest.getIndexName(),
          e);
      responseObserver.onError(
          Status.INVALID_ARGUMENT
              .withDescription(
                  "error while trying to deleteAll for index: "
                      + deleteAllDocumentsRequest.getIndexName())
              .augmentDescription(e.getMessage())
              .asRuntimeException());
    }
  }

  private DeleteAllDocumentsResponse handle(IndexState indexState)
      throws DeleteAllDocumentsHandlerException {
    final ShardState shardState = indexState.getShard(0);
    indexState.verifyStarted();
    long gen;
    try {
      gen = shardState.writer.deleteAll();
    } catch (IOException e) {
      logger.warn(
          "ThreadId: {}, writer.deleteAll failed",
          Thread.currentThread().getName() + Thread.currentThread().getId());
      throw new DeleteAllDocumentsHandlerException(e);
    }
    return DeleteAllDocumentsResponse.newBuilder().setGenId(String.valueOf(gen)).build();
  }

  public static class DeleteAllDocumentsHandlerException extends Handler.HandlerException {

    public DeleteAllDocumentsHandlerException(Throwable err) {
      super(err);
    }
  }
}