| ;; 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. |
| (ns backtype.storm.command.rebalance |
| (:use [clojure.tools.cli :only [cli]]) |
| (:use [backtype.storm thrift config log]) |
| (:import [backtype.storm.generated RebalanceOptions]) |
| (:gen-class)) |
| |
| (defn- parse-executor [^String s] |
| (let [eq-pos (.lastIndexOf s "=") |
| name (.substring s 0 eq-pos) |
| amt (.substring s (inc eq-pos))] |
| {name (Integer/parseInt amt)} |
| )) |
| |
| (defn -main [& args] |
| (let [[{wait :wait executor :executor num-workers :num-workers} [name] _] |
| (cli args ["-w" "--wait" :default nil :parse-fn #(Integer/parseInt %)] |
| ["-n" "--num-workers" :default nil :parse-fn #(Integer/parseInt %)] |
| ["-e" "--executor" :parse-fn parse-executor |
| :assoc-fn (fn [previous key val] |
| (assoc previous key |
| (if-let [oldval (get previous key)] |
| (merge oldval val) |
| val)))]) |
| opts (RebalanceOptions.)] |
| (if wait (.set_wait_secs opts wait)) |
| (if executor (.set_num_executors opts executor)) |
| (if num-workers (.set_num_workers opts num-workers)) |
| (with-configured-nimbus-connection nimbus |
| (.rebalance nimbus name opts) |
| (log-message "Topology " name " is rebalancing") |
| ))) |