org.apache.kyuubi.jdbc.hive.logs.InPlaceUpdateStream Maven / Gradle / Ivy

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/*
 * 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.kyuubi.jdbc.hive.logs;

import org.apache.kyuubi.shaded.hive.service.rpc.thrift.TProgressUpdateResp;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public interface InPlaceUpdateStream {
  void update(TProgressUpdateResp response);

  InPlaceUpdateStream NO_OP =
      new InPlaceUpdateStream() {
        private final EventNotifier eventNotifier = new EventNotifier();

        @Override
        public void update(TProgressUpdateResp response) {}

        @Override
        public EventNotifier getEventNotifier() {
          return eventNotifier;
        }
      };

  EventNotifier getEventNotifier();

  class EventNotifier {
    public static final Logger LOG = LoggerFactory.getLogger(EventNotifier.class.getName());
    boolean isComplete = false;
    boolean isOperationLogUpdatedOnceAtLeast = false;

    public synchronized void progressBarCompleted() {
      LOG.debug("progress bar is complete");
      this.isComplete = true;
    }

    private synchronized boolean isProgressBarComplete() {
      return isComplete;
    }

    public synchronized void operationLogShowedToUser() {
      LOG.debug("operations log is shown to the user");
      isOperationLogUpdatedOnceAtLeast = true;
    }

    public synchronized boolean isOperationLogUpdatedAtLeastOnce() {
      return isOperationLogUpdatedOnceAtLeast;
    }

    public boolean canOutputOperationLogs() {
      return !isOperationLogUpdatedAtLeastOnce() || isProgressBarComplete();
    }
  }
}