| /** |
| * 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.storm.scheduler.utils; |
| |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.util.Map; |
| import org.apache.storm.DaemonConfig; |
| import org.apache.storm.utils.Utils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Scheduler configuration loader which loads configs from a file. |
| */ |
| public class FileConfigLoader implements IConfigLoader { |
| private static final Logger LOG = LoggerFactory.getLogger(FileConfigLoader.class); |
| |
| private Map<String, Object> conf; |
| private String targetFilePath = null; |
| |
| public FileConfigLoader(Map<String, Object> conf) { |
| this.conf = conf; |
| String uriString = (String) conf.get(DaemonConfig.SCHEDULER_CONFIG_LOADER_URI); |
| if (uriString == null) { |
| LOG.error("No URI defined in {} configuration.", DaemonConfig.SCHEDULER_CONFIG_LOADER_URI); |
| } else { |
| try { |
| targetFilePath = new URI(uriString).getPath(); |
| } catch (URISyntaxException e) { |
| LOG.error("Failed to parse uri={}", uriString); |
| } |
| } |
| } |
| |
| /** |
| * Load the configs associated with the configKey from the targetFilePath. |
| * @param configKey The key from which we want to get the scheduler config. |
| * @return The scheduler configuration if exists; null otherwise. |
| */ |
| @Override |
| public Map<String, Object> load(String configKey) { |
| if (targetFilePath != null) { |
| try { |
| Map<String, Object> raw = (Map<String, Object>) Utils.readYamlFile(targetFilePath); |
| if (raw != null) { |
| return (Map<String, Object>) raw.get(configKey); |
| } |
| } catch (Exception e) { |
| LOG.error("Failed to load from file {}", targetFilePath); |
| } |
| } |
| return null; |
| } |
| } |