| ;; 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.disruptor |
| (:import [backtype.storm.utils DisruptorQueue WorkerBackpressureCallback DisruptorBackpressureCallback]) |
| (:import [com.lmax.disruptor.dsl ProducerType]) |
| (:require [clojure [string :as str]]) |
| (:require [clojure [set :as set]]) |
| (:use [clojure walk]) |
| (:use [backtype.storm util log])) |
| |
| (def PRODUCER-TYPE |
| {:multi-threaded ProducerType/MULTI |
| :single-threaded ProducerType/SINGLE}) |
| |
| (defnk disruptor-queue |
| [^String queue-name buffer-size timeout :producer-type :multi-threaded :batch-size 100 :batch-timeout 1] |
| (DisruptorQueue. queue-name |
| (PRODUCER-TYPE producer-type) buffer-size |
| timeout batch-size batch-timeout)) |
| |
| (defn clojure-handler |
| [afn] |
| (reify com.lmax.disruptor.EventHandler |
| (onEvent |
| [this o seq-id batchEnd?] |
| (afn o seq-id batchEnd?)))) |
| |
| (defn disruptor-backpressure-handler |
| [afn-high-wm afn-low-wm] |
| (reify DisruptorBackpressureCallback |
| (highWaterMark |
| [this] |
| (afn-high-wm)) |
| (lowWaterMark |
| [this] |
| (afn-low-wm)))) |
| |
| (defn worker-backpressure-handler |
| [afn] |
| (reify WorkerBackpressureCallback |
| (onEvent |
| [this o] |
| (afn o)))) |
| |
| (defmacro handler |
| [& args] |
| `(clojure-handler (fn ~@args))) |
| |
| (defn publish |
| [^DisruptorQueue q o] |
| (.publish q o)) |
| |
| (defn consume-batch |
| [^DisruptorQueue queue handler] |
| (.consumeBatch queue handler)) |
| |
| (defn consume-batch-when-available |
| [^DisruptorQueue queue handler] |
| (.consumeBatchWhenAvailable queue handler)) |
| |
| (defn halt-with-interrupt! |
| [^DisruptorQueue queue] |
| (.haltWithInterrupt queue)) |
| |
| (defnk consume-loop* |
| [^DisruptorQueue queue handler |
| :kill-fn (fn [error] (exit-process! 1 "Async loop died!"))] |
| (async-loop |
| (fn [] (consume-batch-when-available queue handler) 0) |
| :kill-fn kill-fn |
| :thread-name (.getName queue))) |
| |
| (defmacro consume-loop [queue & handler-args] |
| `(let [handler# (handler ~@handler-args)] |
| (consume-loop* ~queue handler#))) |