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.catalog;
020
021import org.apache.reef.annotations.audience.Private;
022import org.apache.reef.driver.catalog.NodeDescriptor;
023import org.apache.reef.driver.catalog.RackDescriptor;
024import org.apache.reef.driver.catalog.ResourceCatalog;
025import org.apache.reef.runtime.common.driver.resourcemanager.NodeDescriptorEvent;
026
027import javax.inject.Inject;
028import java.net.InetSocketAddress;
029import java.util.*;
030import java.util.logging.Level;
031import java.util.logging.Logger;
032
033/**
034 * A catalog of the resources available to a REEF instance.
035 */
036@Private
037public final class ResourceCatalogImpl implements ResourceCatalog {
038
039  public static final String DEFAULT_RACK = "/default-rack";
040  private static final Logger LOG = Logger.getLogger(ResourceCatalog.class.getName());
041  private final Map<String, RackDescriptorImpl> racks = new HashMap<>();
042
043  private final Map<String, NodeDescriptorImpl> nodes = new HashMap<>();
044
045  @Inject
046  ResourceCatalogImpl() {
047    LOG.log(Level.FINE, "Instantiated 'ResourceCatalogImpl'");
048  }
049
050  @Override
051  public synchronized String toString() {
052    final StringBuilder sb = new StringBuilder();
053    sb.append("=== Resource Catalog ===");
054    for (final RackDescriptor rack : racks.values()) {
055      sb.append("\n" + rack);
056    }
057    return sb.toString();
058  }
059
060  @Override
061  public synchronized Collection<NodeDescriptor> getNodes() {
062    return Collections.unmodifiableCollection(new ArrayList<NodeDescriptor>(this.nodes.values()));
063  }
064
065  @Override
066  public synchronized Collection<RackDescriptor> getRacks() {
067    return Collections.unmodifiableCollection(new ArrayList<RackDescriptor>(this.racks.values()));
068  }
069
070  public synchronized NodeDescriptor getNode(final String id) {
071    return this.nodes.get(id);
072  }
073
074  public synchronized void handle(final NodeDescriptorEvent node) {
075    final String rackName = node.getRackName().orElse(DEFAULT_RACK);
076
077    LOG.log(Level.FINEST, "Catalog new node: id[{0}], rack[{1}], host[{2}], port[{3}], memory[{4}]",
078        new Object[]{node.getIdentifier(), rackName, node.getHostName(), node.getPort(),
079            node.getMemorySize()}
080    );
081
082    if (!this.racks.containsKey(rackName)) {
083      final RackDescriptorImpl rack = new RackDescriptorImpl(rackName);
084      this.racks.put(rackName, rack);
085    }
086    final RackDescriptorImpl rack = this.racks.get(rackName);
087    final InetSocketAddress address = new InetSocketAddress(node.getHostName(), node.getPort());
088    final NodeDescriptorImpl nodeDescriptor = new NodeDescriptorImpl(node.getIdentifier(), address, rack,
089        node.getMemorySize());
090    this.nodes.put(nodeDescriptor.getId(), nodeDescriptor);
091  }
092}