| package org.apache.solr.cloud; |
| |
| /* |
| * 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.ByteArrayInputStream; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.List; |
| import java.util.Properties; |
| |
| import org.apache.solr.common.SolrException; |
| import org.apache.solr.common.SolrException.ErrorCode; |
| import org.apache.solr.common.cloud.ZooKeeperException; |
| import org.apache.solr.core.SolrResourceLoader; |
| import org.apache.zookeeper.KeeperException; |
| |
| /** |
| * ResourceLoader that works with ZooKeeper. |
| * |
| */ |
| public class ZkSolrResourceLoader extends SolrResourceLoader { |
| |
| private final String collectionZkPath; |
| private ZkController zkController; |
| |
| public ZkSolrResourceLoader(String instanceDir, String collection, |
| ZkController zooKeeperController) { |
| super(instanceDir); |
| this.zkController = zooKeeperController; |
| collectionZkPath = ZkController.CONFIGS_ZKNODE + "/" + collection; |
| } |
| |
| /** |
| * <p> |
| * This loader will first attempt to load resources from ZooKeeper, but if not found |
| * will delegate to the context classloader when possible, |
| * otherwise it will attempt to resolve resources using any jar files found in |
| * the "lib/" directory in the specified instance directory. |
| * <p> |
| */ |
| public ZkSolrResourceLoader(String instanceDir, String collection, ClassLoader parent, |
| Properties coreProperties, ZkController zooKeeperController) { |
| super(instanceDir, parent, coreProperties); |
| this.zkController = zooKeeperController; |
| collectionZkPath = ZkController.CONFIGS_ZKNODE + "/" + collection; |
| } |
| |
| /** |
| * Opens any resource by its name. By default, this will look in multiple |
| * locations to load the resource: $configDir/$resource from ZooKeeper. |
| * It will look for it in any jar |
| * accessible through the class loader if it cannot be found in ZooKeeper. |
| * Override this method to customize loading resources. |
| * |
| * @return the stream for the named resource |
| */ |
| @Override |
| public InputStream openResource(String resource) throws IOException { |
| InputStream is = null; |
| String file = collectionZkPath + "/" + resource; |
| try { |
| if (zkController.pathExists(file)) { |
| byte[] bytes = zkController.getZkClient().getData(file, null, null, true); |
| return new ByteArrayInputStream(bytes); |
| } |
| } catch (Exception e) { |
| throw new IOException("Error opening " + file, e); |
| } |
| try { |
| // delegate to the class loader (looking into $INSTANCE_DIR/lib jars) |
| is = classLoader.getResourceAsStream(resource.replace(File.separatorChar, '/')); |
| } catch (Exception e) { |
| throw new IOException("Error opening " + resource, e); |
| } |
| if (is == null) { |
| throw new IOException("Can't find resource '" + resource |
| + "' in classpath or '" + collectionZkPath + "', cwd=" |
| + System.getProperty("user.dir")); |
| } |
| return is; |
| } |
| |
| @Override |
| public String getConfigDir() { |
| throw new ZooKeeperException( |
| ErrorCode.SERVER_ERROR, |
| "ZkSolrResourceLoader does not support getConfigDir() - likely, what you are trying to do is not supported in ZooKeeper mode"); |
| } |
| |
| @Override |
| public String[] listConfigDir() { |
| List<String> list; |
| try { |
| list = zkController.getZkClient().getChildren(collectionZkPath, null, true); |
| } catch (InterruptedException e) { |
| // Restore the interrupted status |
| Thread.currentThread().interrupt(); |
| log.error("", e); |
| throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR, |
| "", e); |
| } catch (KeeperException e) { |
| log.error("", e); |
| throw new ZooKeeperException(SolrException.ErrorCode.SERVER_ERROR, |
| "", e); |
| } |
| return list.toArray(new String[0]); |
| } |
| |
| public String getCollectionZkPath() { |
| return collectionZkPath; |
| } |
| |
| public ZkController getZkController() { |
| return zkController; |
| } |
| } |