/
task.clj
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/
task.clj
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;; 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 org.apache.storm.daemon.task
(:use [org.apache.storm.daemon common])
(:use [org.apache.storm config util log])
(:import [org.apache.storm.hooks ITaskHook])
(:import [org.apache.storm.tuple Tuple TupleImpl])
(:import [org.apache.storm.grouping LoadMapping])
(:import [org.apache.storm.generated SpoutSpec Bolt StateSpoutSpec StormTopology])
(:import [org.apache.storm.hooks.info SpoutAckInfo SpoutFailInfo
EmitInfo BoltFailInfo BoltAckInfo])
(:import [org.apache.storm.task TopologyContext ShellBolt WorkerTopologyContext])
(:import [org.apache.storm.utils Utils])
(:import [org.apache.storm.generated ShellComponent JavaObject])
(:import [org.apache.storm.spout ShellSpout])
(:import [java.util Collection List ArrayList])
(:require [org.apache.storm
[thrift :as thrift]
[stats :as stats]])
(:require [org.apache.storm.daemon.builtin-metrics :as builtin-metrics]))
(defn mk-topology-context-builder [worker executor-data topology]
(let [conf (:conf worker)]
#(TopologyContext.
topology
(:storm-conf worker)
(:task->component worker)
(:component->sorted-tasks worker)
(:component->stream->fields worker)
(:storm-id worker)
(supervisor-storm-resources-path
(supervisor-stormdist-root conf (:storm-id worker)))
(worker-pids-root conf (:worker-id worker))
(int %)
(:port worker)
(:task-ids worker)
(:default-shared-resources worker)
(:user-shared-resources worker)
(:shared-executor-data executor-data)
(:interval->task->metric-registry executor-data)
(:open-or-prepare-was-called? executor-data))))
(defn system-topology-context [worker executor-data tid]
((mk-topology-context-builder
worker
executor-data
(:system-topology worker))
tid))
(defn user-topology-context [worker executor-data tid]
((mk-topology-context-builder
worker
executor-data
(:topology worker))
tid))
(defn- get-task-object [^StormTopology topology component-id]
(let [spouts (.get_spouts topology)
bolts (.get_bolts topology)
state-spouts (.get_state_spouts topology)
obj (Utils/getSetComponentObject
(cond
(contains? spouts component-id) (.get_spout_object ^SpoutSpec (get spouts component-id))
(contains? bolts component-id) (.get_bolt_object ^Bolt (get bolts component-id))
(contains? state-spouts component-id) (.get_state_spout_object ^StateSpoutSpec (get state-spouts component-id))
true (throw-runtime "Could not find " component-id " in " topology)))
obj (if (instance? ShellComponent obj)
(if (contains? spouts component-id)
(ShellSpout. obj)
(ShellBolt. obj))
obj )
obj (if (instance? JavaObject obj)
(thrift/instantiate-java-object obj)
obj )]
obj
))
(defn get-context-hooks [^TopologyContext context]
(.getHooks context))
(defn hooks-empty? [^Collection hooks]
(.isEmpty hooks))
(defmacro apply-hooks [topology-context method-sym info-form]
(let [hook-sym (with-meta (gensym "hook") {:tag 'org.apache.storm.hooks.ITaskHook})]
`(let [hooks# (get-context-hooks ~topology-context)]
(when-not (hooks-empty? hooks#)
(let [info# ~info-form]
(fast-list-iter [~hook-sym hooks#]
(~method-sym ~hook-sym info#)
))))))
;; TODO: this is all expensive... should be precomputed
(defn send-unanchored
[task-data stream values]
(let [^TopologyContext topology-context (:system-context task-data)
tasks-fn (:tasks-fn task-data)
transfer-fn (-> task-data :executor-data :transfer-fn)
out-tuple (TupleImpl. topology-context
values
(.getThisTaskId topology-context)
stream)]
(fast-list-iter [t (tasks-fn stream values)]
(transfer-fn t out-tuple))))
(defn mk-tasks-fn [task-data]
(let [task-id (:task-id task-data)
executor-data (:executor-data task-data)
^LoadMapping load-mapping (:load-mapping (:worker executor-data))
component-id (:component-id executor-data)
^WorkerTopologyContext worker-context (:worker-context executor-data)
storm-conf (:storm-conf executor-data)
emit-sampler (mk-stats-sampler storm-conf)
stream->component->grouper (:stream->component->grouper executor-data)
user-context (:user-context task-data)
executor-stats (:stats executor-data)
debug? (= true (storm-conf TOPOLOGY-DEBUG))]
(fn ([^Integer out-task-id ^String stream ^List values]
(when debug?
(log-message "Emitting direct: " out-task-id "; " component-id " " stream " " values))
(let [target-component (.getComponentId worker-context out-task-id)
component->grouping (get stream->component->grouper stream)
grouping (get component->grouping target-component)
out-task-id (if grouping out-task-id)]
(when (and (not-nil? grouping) (not= :direct grouping))
(throw (IllegalArgumentException. "Cannot emitDirect to a task expecting a regular grouping")))
(apply-hooks user-context .emit (EmitInfo. values stream task-id [out-task-id]))
(when (emit-sampler)
(stats/emitted-tuple! executor-stats stream)
(if out-task-id
(stats/transferred-tuples! executor-stats stream 1)))
(if out-task-id [out-task-id])
))
([^String stream ^List values]
(when debug?
(log-message "Emitting: " component-id " " stream " " values))
(let [out-tasks (ArrayList.)]
(fast-map-iter [[out-component grouper] (get stream->component->grouper stream)]
(when (= :direct grouper)
;; TODO: this is wrong, need to check how the stream was declared
(throw (IllegalArgumentException. "Cannot do regular emit to direct stream")))
(let [comp-tasks (grouper task-id values load-mapping)]
(if (or (sequential? comp-tasks) (instance? Collection comp-tasks))
(.addAll out-tasks comp-tasks)
(.add out-tasks comp-tasks)
)))
(apply-hooks user-context .emit (EmitInfo. values stream task-id out-tasks))
(when (emit-sampler)
(stats/emitted-tuple! executor-stats stream)
(stats/transferred-tuples! executor-stats stream (count out-tasks)))
out-tasks)))
))
(defn mk-task-data [executor-data task-id]
(recursive-map
:executor-data executor-data
:task-id task-id
:system-context (system-topology-context (:worker executor-data) executor-data task-id)
:user-context (user-topology-context (:worker executor-data) executor-data task-id)
:builtin-metrics (builtin-metrics/make-data (:type executor-data) (:stats executor-data))
:tasks-fn (mk-tasks-fn <>)
:object (get-task-object (.getRawTopology ^TopologyContext (:system-context <>)) (:component-id executor-data))))
(defn mk-task [executor-data task-id]
(let [task-data (mk-task-data executor-data task-id)
storm-conf (:storm-conf executor-data)]
(doseq [klass (storm-conf TOPOLOGY-AUTO-TASK-HOOKS)]
(.addTaskHook ^TopologyContext (:user-context task-data) (-> klass Class/forName .newInstance)))
;; when this is called, the threads for the executor haven't been started yet,
;; so we won't be risking trampling on the single-threaded claim strategy disruptor queue
(send-unanchored task-data SYSTEM-STREAM-ID ["startup"])
task-data
))