| /* |
| * 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.jackrabbit.oak.plugins.index.solr.configuration.nodestate; |
| |
| import javax.annotation.Nonnull; |
| import javax.annotation.Nullable; |
| |
| import org.apache.jackrabbit.oak.api.PropertyState; |
| import org.apache.jackrabbit.oak.plugins.index.solr.configuration.SolrServerConfiguration; |
| import org.apache.jackrabbit.oak.plugins.index.solr.server.OakSolrServer; |
| import org.apache.jackrabbit.oak.plugins.index.solr.server.SolrServerProvider; |
| import org.apache.jackrabbit.oak.plugins.index.solr.server.SolrServerRegistry; |
| import org.apache.jackrabbit.oak.spi.commit.CommitInfo; |
| import org.apache.jackrabbit.oak.spi.commit.DiffObserver; |
| import org.apache.jackrabbit.oak.spi.state.NodeState; |
| import org.apache.jackrabbit.oak.spi.state.NodeStateDiff; |
| import org.apache.solr.client.solrj.SolrServer; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * An {@link org.apache.jackrabbit.oak.spi.commit.Observer} looking for changes on persisted Solr server configuration nodes. |
| * If any change is done there, the related {@link org.apache.solr.client.solrj.SolrServer}s are shutdown and unregistered |
| * from the {@link org.apache.jackrabbit.oak.plugins.index.solr.server.SolrServerRegistry} |
| */ |
| public class NodeStateSolrServersObserver extends DiffObserver { |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| @Override |
| protected NodeStateDiff getRootDiff(@Nonnull NodeState before, @Nonnull NodeState after, @Nullable CommitInfo info) { |
| return new ChangingSolrServersNodeStateDiff(after); |
| } |
| |
| private void shutdownRegisteredSolrServers(NodeState nodeState) { |
| log.debug("shutting down persisted Solr server"); |
| NodeStateSolrServerConfigurationProvider nodeStateSolrServerConfigurationProvider = new NodeStateSolrServerConfigurationProvider(nodeState); |
| OakSolrServer oakSolrServer = new OakSolrServer(nodeStateSolrServerConfigurationProvider); |
| oakSolrServer.shutdown(); |
| log.info("persisted Solr server has been shutdown"); |
| } |
| |
| private class ChangingSolrServersNodeStateDiff implements NodeStateDiff { |
| private final NodeState nodeState; |
| private final String name; |
| |
| public ChangingSolrServersNodeStateDiff(NodeState after) { |
| nodeState = after; |
| name = ""; |
| } |
| |
| public ChangingSolrServersNodeStateDiff(NodeState nodeState, String name) { |
| this.nodeState = nodeState; |
| this.name = name; |
| } |
| |
| @Override |
| public boolean propertyAdded(PropertyState after) { |
| if (isSolrServerNode(name, nodeState)) { |
| shutdownRegisteredSolrServers(nodeState); |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean propertyChanged(PropertyState before, PropertyState after) { |
| if (isSolrServerNode(name, nodeState)) { |
| shutdownRegisteredSolrServers(nodeState); |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean propertyDeleted(PropertyState before) { |
| if (isSolrServerNode(name, nodeState)) { |
| shutdownRegisteredSolrServers(nodeState); |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean childNodeAdded(String name, NodeState after) { |
| return true; |
| } |
| |
| @Override |
| public boolean childNodeChanged(String name, NodeState before, NodeState after) { |
| if (isSolrServerNode(name, before)) { |
| shutdownRegisteredSolrServers(before); |
| } |
| return after.compareAgainstBaseState(before, new ChangingSolrServersNodeStateDiff(after, this.name + "/" + name)); |
| } |
| |
| @Override |
| public boolean childNodeDeleted(String name, NodeState before) { |
| if (isSolrServerNode(name, before)) { // look if the deleted node was a server node |
| shutdownRegisteredSolrServers(before); |
| } else { //look among child nodes if there was a server node |
| for (String childNodeName : before.getChildNodeNames()) { |
| NodeState childNodeState = before.getChildNode(childNodeName); |
| if (isSolrServerNode(childNodeName, childNodeState)) { |
| shutdownRegisteredSolrServers(childNodeState); |
| break; |
| } |
| } |
| } |
| return true; |
| } |
| |
| private boolean isSolrServerNode(String name, NodeState nodeState) { |
| log.info("checking {} in {}", name, nodeState); |
| return "server".equals(name) && nodeState.hasProperty("solrServerType"); |
| } |
| |
| } |
| } |