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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
#!/usr/bin/env ruby
# Copyright 2015, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# Sample gRPC Ruby server that implements the Math::Calc service and helps
# validate GRPC::RpcServer as GRPC implementation using proto2 serialization.
#
# Usage: $ path/to/math_server.rb
this_dir = File.expand_path(File.dirname(__FILE__))
lib_dir = File.join(File.dirname(this_dir), 'lib')
$LOAD_PATH.unshift(lib_dir) unless $LOAD_PATH.include?(lib_dir)
$LOAD_PATH.unshift(this_dir) unless $LOAD_PATH.include?(this_dir)
require 'forwardable'
require 'grpc'
require 'logger'
require 'math_services_pb'
require 'optparse'
# RubyLogger defines a logger for gRPC based on the standard ruby logger.
module RubyLogger
def logger
LOGGER
end
LOGGER = Logger.new(STDOUT)
end
# GRPC is the general RPC module
module GRPC
# Inject the noop #logger if no module-level logger method has been injected.
extend RubyLogger
end
# Holds state for a fibonacci series
class Fibber
def initialize(limit)
fail "bad limit: got #{limit}, want limit > 0" if limit < 1
@limit = limit
end
def generator
return enum_for(:generator) unless block_given?
idx, current, previous = 0, 1, 1
until idx == @limit
if idx.zero? || idx == 1
yield Math::Num.new(num: 1)
idx += 1
next
end
tmp = current
current = previous + current
previous = tmp
yield Math::Num.new(num: current)
idx += 1
end
end
end
# A EnumeratorQueue wraps a Queue to yield the items added to it.
class EnumeratorQueue
extend Forwardable
def_delegators :@q, :push
def initialize(sentinel)
@q = Queue.new
@sentinel = sentinel
end
def each_item
return enum_for(:each_item) unless block_given?
loop do
r = @q.pop
break if r.equal?(@sentinel)
fail r if r.is_a? Exception
yield r
end
end
end
# The Math::Math:: module occurs because the service has the same name as its
# package. That practice should be avoided by defining real services.
class Calculator < Math::Math::Service
def div(div_args, _call)
if div_args.divisor.zero?
# To send non-OK status handlers raise a StatusError with the code and
# and detail they want sent as a Status.
fail GRPC::StatusError.new(GRPC::Status::INVALID_ARGUMENT,
'divisor cannot be 0')
end
Math::DivReply.new(quotient: div_args.dividend / div_args.divisor,
remainder: div_args.dividend % div_args.divisor)
end
def sum(call)
# the requests are accesible as the Enumerator call#each_request
nums = call.each_remote_read.collect(&:num)
sum = nums.inject { |s, x| s + x }
Math::Num.new(num: sum)
end
def fib(fib_args, _call)
if fib_args.limit < 1
fail StatusError.new(Status::INVALID_ARGUMENT, 'limit must be >= 0')
end
# return an Enumerator of Nums
Fibber.new(fib_args.limit).generator
# just return the generator, GRPC::GenericServer sends each actual response
end
def div_many(requests)
# requests is an lazy Enumerator of the requests sent by the client.
q = EnumeratorQueue.new(self)
t = Thread.new do
begin
requests.each do |req|
GRPC.logger.info("read #{req.inspect}")
resp = Math::DivReply.new(quotient: req.dividend / req.divisor,
remainder: req.dividend % req.divisor)
q.push(resp)
Thread.pass # let the internal Bidi threads run
end
GRPC.logger.info('finished reads')
q.push(self)
rescue StandardError => e
q.push(e) # share the exception with the enumerator
raise e
end
end
t.priority = -2 # hint that the div_many thread should not be favoured
q.each_item
end
end
def load_test_certs
this_dir = File.expand_path(File.dirname(__FILE__))
data_dir = File.join(File.dirname(this_dir), 'spec/testdata')
files = ['ca.pem', 'server1.key', 'server1.pem']
files.map { |f| File.open(File.join(data_dir, f)).read }
end
def test_server_creds
certs = load_test_certs
GRPC::Core::ServerCredentials.new(
nil, [{ private_key: certs[1], cert_chain: certs[2] }], false)
end
def main
options = {
'host' => 'localhost:7071',
'secure' => false
}
OptionParser.new do |opts|
opts.banner = 'Usage: [--host <hostname>:<port>] [--secure|-s]'
opts.on('--host HOST', '<hostname>:<port>') do |v|
options['host'] = v
end
opts.on('-s', '--secure', 'access using test creds') do |v|
options['secure'] = v
end
end.parse!
s = GRPC::RpcServer.new
if options['secure']
s.add_http2_port(options['host'], test_server_creds)
GRPC.logger.info("... running securely on #{options['host']}")
else
s.add_http2_port(options['host'], :this_port_is_insecure)
GRPC.logger.info("... running insecurely on #{options['host']}")
end
s.handle(Calculator)
s.run_till_terminated
end
main
|
