| package org.apache.helix.model; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.LinkedHashMap; |
| import org.apache.helix.HelixException; |
| import org.apache.helix.controller.rebalancer.topology.Topology; |
| |
| |
| public class ClusterTopologyConfig { |
| private static final String DEFAULT_DOMAIN_PREFIX = "Helix_default_"; |
| private static final String TOPOLOGY_SPLITTER = "/"; |
| |
| private final boolean _topologyAwareEnabled; |
| private final String _endNodeType; |
| private final String _faultZoneType; |
| private final LinkedHashMap<String, String> _topologyKeyDefaultValue; |
| |
| private ClusterTopologyConfig(boolean topologyAwareEnabled, String endNodeType, String faultZoneType, |
| LinkedHashMap<String, String> topologyKeyDefaultValue) { |
| _topologyAwareEnabled = topologyAwareEnabled; |
| _endNodeType = endNodeType; |
| _faultZoneType = faultZoneType; |
| _topologyKeyDefaultValue = topologyKeyDefaultValue; |
| } |
| |
| /** |
| * Populate faultZone, endNodetype and and a LinkedHashMap containing pathKeys default values for |
| * clusterConfig.Topology. The LinkedHashMap will be empty if clusterConfig.Topology is unset. |
| * |
| * @return an instance of {@link ClusterTopologyConfig} |
| */ |
| public static ClusterTopologyConfig createFromClusterConfig(ClusterConfig clusterConfig) { |
| if (!clusterConfig.isTopologyAwareEnabled()) { |
| return new ClusterTopologyConfig( |
| false, |
| Topology.Types.INSTANCE.name(), |
| Topology.Types.INSTANCE.name(), |
| new LinkedHashMap<>()); |
| } |
| // Assign default cluster topology definition, i,e. /root/zone/instance |
| String endNodeType = Topology.Types.INSTANCE.name(); |
| String faultZoneType = Topology.Types.ZONE.name(); |
| LinkedHashMap<String, String> topologyKeyDefaultValue = new LinkedHashMap<>(); |
| |
| String topologyDef = clusterConfig.getTopology(); |
| if (topologyDef != null) { |
| for (String topologyKey : topologyDef.trim().split(TOPOLOGY_SPLITTER)) { |
| if (!topologyKey.isEmpty()) { |
| topologyKeyDefaultValue.put(topologyKey, DEFAULT_DOMAIN_PREFIX + topologyKey); |
| endNodeType = topologyKey; |
| } |
| } |
| if (topologyKeyDefaultValue.isEmpty()) { |
| throw new IllegalArgumentException("Invalid cluster topology definition " + topologyDef); |
| } |
| faultZoneType = clusterConfig.getFaultZoneType(); |
| if (faultZoneType == null) { |
| faultZoneType = endNodeType; |
| } else if (!topologyKeyDefaultValue.containsKey(faultZoneType)) { |
| throw new HelixException( |
| String.format("Invalid fault zone type %s, not present in topology definition %s.", |
| faultZoneType, clusterConfig.getTopology())); |
| } |
| } |
| return new ClusterTopologyConfig(true, endNodeType, faultZoneType, topologyKeyDefaultValue); |
| } |
| |
| public boolean isTopologyAwareEnabled() { |
| return _topologyAwareEnabled; |
| } |
| |
| public String getEndNodeType() { |
| return _endNodeType; |
| } |
| |
| public String getFaultZoneType() { |
| return _faultZoneType; |
| } |
| |
| public LinkedHashMap<String, String> getTopologyKeyDefaultValue() { |
| return _topologyKeyDefaultValue; |
| } |
| } |