1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
# Copyright 2011-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file 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.
require 'timeout'
module AWS
class SimpleWorkflow
class ActivityTaskCollection
include Core::Model
include OptionFormatters
# @api private
def initialize domain, options = {}
@domain = domain
super
end
# @return [Domain]
attr_reader :domain
# Returns the number of tasks in the specified `task_list`.
#
# count = activity_tasks.count('task-list-name')
# count.truncated? #=> false
# count.to_i #=> 7
#
# @note This operation is eventually consistent. The results are best
# effort and may not exactly reflect recent updates and changes.
#
# @param [String] task_list The name of the task list.
#
# @return [Count] Returns a possibly truncated count of
# pending activity tasks for the given `task_list`.
#
def count task_list
options = {}
options[:domain] = domain.name
options[:task_list] = { :name => task_list }
response = client.count_pending_activity_tasks(options)
Count.new(response.data['count'], response.data['truncated'])
end
# @param [String] task_list The task list to check for pending
# activity tasks in.
#
# @param [Hash] options
#
# @option options [String] :identity (nil) Identity of the worker
# making the request, which is recorded in the ActivityTaskStarted
# event in the workflow history. This enables diagnostic tracing
# when problems arise. The :identity defaults to the hostname and
# pid (e.g. "hostname:pid").
#
# @yieldparam [ActivityTask] activity_task Yields if a task is
# available within 60 seconds.
#
# @return [ActivityTask,nil] Returns an activity task when one is
# available, `nil` otherwise. If you call this function with
# a block, `nil` is always returned.
#
def poll_for_single_task task_list, options = {}, &block
client_opts = {}
client_opts[:domain] = domain.name
client_opts[:task_list] = { :name => task_list }
client_opts[:identity] = identity_opt(options)
response = client.poll_for_activity_task(client_opts)
if response.data['taskToken']
activity_task = ActivityTask.new(domain, response.data)
if block_given?
begin
yield(activity_task)
activity_task.complete! unless activity_task.responded?
rescue ActivityTask::CancelRequestedError
activity_task.cancel! unless activity_task.responded?
rescue StandardError => e
unless activity_task.responded?
reason = "UNTRAPPED ERROR: #{e.message}"
details = e.backtrace.join("\n")
activity_task.fail!(:reason => reason, :details => details)
end
raise e
end
nil
else
activity_task
end
else
nil
end
end
def poll task_list, options = {}, &block
loop do
begin
poll_for_single_task(task_list, options) do |activity_task|
yield(activity_task)
end
rescue Timeout::Error
retry
end
end
nil
end
end
end
end
|
