Source code

001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.reef.runtime.common.driver.resourcemanager;
020
021import org.apache.reef.annotations.audience.DriverSide;
022import org.apache.reef.annotations.audience.RuntimeAuthor;
023import org.apache.reef.tang.annotations.DefaultImplementation;
024import org.apache.reef.util.Optional;
025
026/**
027 * Event from Driver Runtime to Driver Process.
028 * Description of a node in the cluster
029 */
030@RuntimeAuthor
031@DriverSide
032@DefaultImplementation(NodeDescriptorEventImpl.class)
033public interface NodeDescriptorEvent {
034
035  /**
036   * @return Id of the node
037   */
038  String getIdentifier();
039
040  /**
041   * @return Host name of the node
042   */
043  String getHostName();
044
045  /**
046   * @return Port of the node
047   */
048  int getPort();
049
050  /**
051   * @return Total memory size of the node, in MB
052   */
053  int getMemorySize();
054
055  /**
056   * @return Name of rack where the node is located
057   */
058  Optional<String> getRackName();
059}