/*
 * 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.hadoop.hdds.scm.node;

import java.util.Objects;
import org.apache.hadoop.hdds.protocol.DatanodeDetails;
import org.apache.hadoop.hdds.scm.server.SCMDatanodeHeartbeatDispatcher.NodeReportFromDatanode;
import org.apache.hadoop.hdds.server.events.EventHandler;
import org.apache.hadoop.hdds.server.events.EventPublisher;

/**
 * Handles Node Reports from datanode.
 */
public class NodeReportHandler implements EventHandler<NodeReportFromDatanode> {

  private final NodeManager nodeManager;

  public NodeReportHandler(NodeManager nodeManager) {
    Objects.requireNonNull(nodeManager, "nodeManager == null");
    this.nodeManager = nodeManager;
  }

  @Override
  public void onMessage(NodeReportFromDatanode nodeReportFromDatanode,
      EventPublisher publisher) {
    Objects.requireNonNull(nodeReportFromDatanode, "nodeReportFromDatanode == null");
    DatanodeDetails dn = nodeReportFromDatanode.getDatanodeDetails();
    Objects.requireNonNull(dn, "NodeReport is "
        + "missing DatanodeDetails.");
    nodeManager
        .processNodeReport(dn, nodeReportFromDatanode.getReport());
  }
}
