/*
 * 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.gobblin.runtime.messaging.handler;

import org.apache.gobblin.runtime.messaging.data.DynamicWorkUnitMessage;
import org.apache.gobblin.runtime.messaging.data.SplitWorkUnitMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Handler that runs on the AM for processing {@link SplitWorkUnitMessage} and re-computing
 * workunit to multiple smaller work units.
 */
public class SplitMessageHandler implements DynamicWorkUnitMessage.Handler {
  private static final Logger LOG = LoggerFactory.getLogger(SplitMessageHandler.class);

  @Override
  public void handle(DynamicWorkUnitMessage message) {
    if (message instanceof SplitWorkUnitMessage) {
      handleSplit((SplitWorkUnitMessage) message);
    }
  }

  private void handleSplit(SplitWorkUnitMessage message) {
    //TODO: GOBBLIN-1688 Recompute workunit based on message.
    LOG.info("Handling {}, message={}", SplitWorkUnitMessage.class.getSimpleName(), message);
  }
}
