| /* |
| * 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.solr.cloud.api.collections; |
| |
| |
| import java.lang.invoke.MethodHandles; |
| import java.util.ArrayList; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.solr.cloud.OverseerNodePrioritizer; |
| import org.apache.solr.common.cloud.ClusterState; |
| import org.apache.solr.common.cloud.SolrZkClient; |
| import org.apache.solr.common.cloud.ZkNodeProps; |
| import org.apache.solr.common.cloud.ZkStateReader; |
| import org.apache.solr.common.params.CollectionParams.CollectionAction; |
| import org.apache.solr.common.util.NamedList; |
| import org.apache.solr.common.util.Utils; |
| import org.apache.zookeeper.CreateMode; |
| import org.apache.zookeeper.data.Stat; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import static org.apache.solr.common.params.CollectionParams.CollectionAction.ADDROLE; |
| import static org.apache.solr.common.params.CollectionParams.CollectionAction.REMOVEROLE; |
| |
| public class OverseerRoleCmd implements OverseerCollectionMessageHandler.Cmd { |
| private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| |
| private final OverseerCollectionMessageHandler ocmh; |
| private final CollectionAction operation; |
| private final OverseerNodePrioritizer overseerPrioritizer; |
| |
| |
| |
| public OverseerRoleCmd(OverseerCollectionMessageHandler ocmh, CollectionAction operation, OverseerNodePrioritizer prioritizer) { |
| this.ocmh = ocmh; |
| this.operation = operation; |
| this.overseerPrioritizer = prioritizer; |
| } |
| |
| @Override |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| public void call(ClusterState state, ZkNodeProps message, NamedList results) throws Exception { |
| ZkStateReader zkStateReader = ocmh.zkStateReader; |
| SolrZkClient zkClient = zkStateReader.getZkClient(); |
| Map roles = null; |
| String node = message.getStr("node"); |
| |
| String roleName = message.getStr("role"); |
| boolean nodeExists = false; |
| if (nodeExists = zkClient.exists(ZkStateReader.ROLES, true)) { |
| roles = (Map) Utils.fromJSON(zkClient.getData(ZkStateReader.ROLES, null, new Stat(), true)); |
| } else { |
| roles = new LinkedHashMap<>(1); |
| } |
| |
| List nodeList = (List) roles.get(roleName); |
| if (nodeList == null) roles.put(roleName, nodeList = new ArrayList<>()); |
| if (ADDROLE == operation) { |
| log.info("Overseer role added to {}", node); |
| if (!nodeList.contains(node)) nodeList.add(node); |
| } else if (REMOVEROLE == operation) { |
| log.info("Overseer role removed from {}", node); |
| nodeList.remove(node); |
| } |
| |
| if (nodeExists) { |
| zkClient.setData(ZkStateReader.ROLES, Utils.toJSON(roles), true); |
| } else { |
| zkClient.create(ZkStateReader.ROLES, Utils.toJSON(roles), CreateMode.PERSISTENT, true); |
| } |
| //if there are too many nodes this command may time out. And most likely dedicated |
| // overseers are created when there are too many nodes . So , do this operation in a separate thread |
| new Thread(() -> { |
| try { |
| overseerPrioritizer.prioritizeOverseerNodes(ocmh.myId); |
| } catch (Exception e) { |
| log.error("Error in prioritizing Overseer", e); |
| } |
| |
| }).start(); |
| |
| } |
| |
| } |