| package org.apache.helix.controller.rebalancer.waged.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.io.IOException; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.helix.HelixException; |
| import org.apache.helix.controller.rebalancer.util.WagedValidationUtil; |
| import org.apache.helix.model.ClusterConfig; |
| import org.apache.helix.model.ResourceConfig; |
| import org.apache.helix.model.StateModelDefinition; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This class represents a partition replication that needs to be allocated. |
| */ |
| public class AssignableReplica implements Comparable<AssignableReplica> { |
| private static final Logger LOG = LoggerFactory.getLogger(AssignableReplica.class); |
| |
| private final String _replicaKey; |
| private final String _partitionName; |
| private final String _resourceName; |
| private final String _resourceInstanceGroupTag; |
| private final int _resourceMaxPartitionsPerInstance; |
| private final Map<String, Integer> _capacityUsage; |
| // The priority of the replica's state |
| private final int _statePriority; |
| // The state of the replica |
| private final String _replicaState; |
| |
| /** |
| * @param clusterConfig The cluster config. |
| * @param resourceConfig The resource config for the resource which contains the replication. |
| * @param partitionName The replication's partition name. |
| * @param replicaState The state of the replication. |
| * @param statePriority The priority of the replication's state. |
| */ |
| AssignableReplica(ClusterConfig clusterConfig, ResourceConfig resourceConfig, |
| String partitionName, String replicaState, int statePriority) { |
| _partitionName = partitionName; |
| _replicaState = replicaState; |
| _statePriority = statePriority; |
| _resourceName = resourceConfig.getResourceName(); |
| _capacityUsage = fetchCapacityUsage(partitionName, resourceConfig, clusterConfig); |
| _resourceInstanceGroupTag = resourceConfig.getInstanceGroupTag(); |
| _resourceMaxPartitionsPerInstance = resourceConfig.getMaxPartitionsPerInstance(); |
| _replicaKey = generateReplicaKey(_resourceName, _partitionName,_replicaState); |
| } |
| |
| public Map<String, Integer> getCapacity() { |
| return _capacityUsage; |
| } |
| |
| public String getPartitionName() { |
| return _partitionName; |
| } |
| |
| public String getReplicaState() { |
| return _replicaState; |
| } |
| |
| public boolean isReplicaTopState() { |
| return _statePriority == StateModelDefinition.TOP_STATE_PRIORITY; |
| } |
| |
| public int getStatePriority() { |
| return _statePriority; |
| } |
| |
| public String getResourceName() { |
| return _resourceName; |
| } |
| |
| public String getResourceInstanceGroupTag() { |
| return _resourceInstanceGroupTag; |
| } |
| |
| public boolean hasResourceInstanceGroupTag() { |
| return _resourceInstanceGroupTag != null && !_resourceInstanceGroupTag.isEmpty(); |
| } |
| |
| public int getResourceMaxPartitionsPerInstance() { |
| return _resourceMaxPartitionsPerInstance; |
| } |
| |
| @Override |
| public String toString() { |
| return _replicaKey; |
| } |
| |
| @Override |
| public int compareTo(AssignableReplica replica) { |
| if (!_resourceName.equals(replica._resourceName)) { |
| return _resourceName.compareTo(replica._resourceName); |
| } |
| if (!_partitionName.equals(replica._partitionName)) { |
| return _partitionName.compareTo(replica._partitionName); |
| } |
| if (!_replicaState.equals(replica._replicaState)) { |
| return _replicaState.compareTo(replica._replicaState); |
| } |
| return 0; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == null) { |
| return false; |
| } |
| if (obj instanceof AssignableReplica) { |
| return compareTo((AssignableReplica) obj) == 0; |
| } else { |
| return false; |
| } |
| } |
| |
| public static String generateReplicaKey(String resourceName, String partitionName, String state) { |
| return String.format("%s-%s-%s", resourceName, partitionName, state); |
| } |
| |
| /** |
| * Parse the resource config for the partition weight. |
| */ |
| private Map<String, Integer> fetchCapacityUsage(String partitionName, |
| ResourceConfig resourceConfig, ClusterConfig clusterConfig) { |
| Map<String, Map<String, Integer>> capacityMap; |
| try { |
| capacityMap = resourceConfig.getPartitionCapacityMap(); |
| } catch (IOException ex) { |
| throw new IllegalArgumentException( |
| "Invalid partition capacity configuration of resource: " + resourceConfig |
| .getResourceName(), ex); |
| } |
| Map<String, Integer> partitionCapacity = WagedValidationUtil |
| .validateAndGetPartitionCapacity(partitionName, resourceConfig, capacityMap, clusterConfig); |
| // Remove the non-required capacity items. |
| partitionCapacity.keySet().retainAll(clusterConfig.getInstanceCapacityKeys()); |
| return partitionCapacity; |
| } |
| } |