| /** |
| * 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.command; |
| |
| import static java.lang.String.format; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.apache.storm.generated.Nimbus; |
| import org.apache.storm.generated.RebalanceOptions; |
| import org.apache.storm.utils.NimbusClient; |
| import org.apache.storm.utils.Utils; |
| import org.json.simple.JSONValue; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| public class Rebalance { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(Rebalance.class); |
| |
| public static void main(String[] args) throws Exception { |
| Map<String, Object> cl = CLI.opt("w", "wait", null, CLI.AS_INT) |
| .opt("n", "num-workers", null, CLI.AS_INT) |
| .opt("e", "executor", null, new ExecutorParser(), CLI.INTO_MAP) |
| .opt("r", "resources", null, new ResourcesParser(), CLI.INTO_MAP) |
| .opt("t", "topology-conf", null, new ConfParser(), CLI.INTO_MAP) |
| .arg("topologyName", CLI.FIRST_WINS) |
| .parse(args); |
| final String name = (String) cl.get("topologyName"); |
| final RebalanceOptions rebalanceOptions = new RebalanceOptions(); |
| Integer wait = (Integer) cl.get("w"); |
| if (null != wait) { |
| rebalanceOptions.set_wait_secs(wait); |
| } |
| Integer numWorkers = (Integer) cl.get("n"); |
| if (null != numWorkers) { |
| rebalanceOptions.set_num_workers(numWorkers); |
| } |
| Map<String, Integer> numExecutors = (Map<String, Integer>) cl.get("e"); |
| if (null != numExecutors) { |
| rebalanceOptions.set_num_executors(numExecutors); |
| } |
| Map<String, Map<String, Double>> resourceOverrides = (Map<String, Map<String, Double>>) cl.get("r"); |
| if (null != resourceOverrides) { |
| rebalanceOptions.set_topology_resources_overrides(resourceOverrides); |
| } |
| |
| Map<String, Object> confOverrides = (Map<String, Object>) cl.get("t"); |
| |
| if (null != confOverrides) { |
| rebalanceOptions.set_topology_conf_overrides(JSONValue.toJSONString(confOverrides)); |
| } |
| |
| NimbusClient.withConfiguredClient(new NimbusClient.WithNimbus() { |
| @Override |
| public void run(Nimbus.Iface nimbus) throws Exception { |
| nimbus.rebalance(name, rebalanceOptions); |
| LOG.info("Topology {} is rebalancing", name); |
| } |
| }); |
| } |
| |
| static final class ConfParser implements CLI.Parse { |
| @Override |
| public Object parse(String value) { |
| if (value == null) { |
| throw new RuntimeException("No arguments found for topology config override!"); |
| } |
| try { |
| return Utils.parseJson(value); |
| } catch (Exception e) { |
| throw new RuntimeException("Error trying to parse topology config override", e); |
| } |
| } |
| } |
| |
| static final class ResourcesParser implements CLI.Parse { |
| @Override |
| public Object parse(String value) { |
| if (value == null) { |
| throw new RuntimeException("No arguments found for topology resources override!"); |
| } |
| try { |
| //This is a bit ugly The JSON we are expecting should be in the form |
| // {"component": {"resource": value, ...}, ...} |
| // But because value is coming from JSON it is going to be a Number, and we want it to be a Double. |
| // So the goal is to go through each entry and update it accordingly |
| Map<String, Map<String, Double>> ret = new HashMap<>(); |
| for (Map.Entry<String, Object> compEntry : Utils.parseJson(value).entrySet()) { |
| String comp = compEntry.getKey(); |
| Map<String, Number> numResources = (Map<String, Number>) compEntry.getValue(); |
| Map<String, Double> doubleResource = new HashMap<>(); |
| for (Map.Entry<String, Number> entry : numResources.entrySet()) { |
| doubleResource.put(entry.getKey(), entry.getValue().doubleValue()); |
| } |
| ret.put(comp, doubleResource); |
| } |
| return ret; |
| } catch (Exception e) { |
| throw new RuntimeException("Error trying to parse resource override", e); |
| } |
| } |
| } |
| |
| static final class ExecutorParser implements CLI.Parse { |
| @Override |
| public Object parse(String value) { |
| try { |
| int splitIndex = value.lastIndexOf('='); |
| String componentName = value.substring(0, splitIndex); |
| Integer parallelism = Integer.parseInt(value.substring(splitIndex + 1)); |
| Map<String, Integer> result = new HashMap<String, Integer>(); |
| result.put(componentName, parallelism); |
| return result; |
| } catch (Throwable ex) { |
| throw new IllegalArgumentException( |
| format("Failed to parse '%s' correctly. Expected in <component>=<parallelism> format", value), ex); |
| } |
| } |
| } |
| |
| } |