Incorporating ruby into the master grpc repository.
Change on 2014/12/01 by nnoble <nnoble@google.com>
-------------
Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=81111468
diff --git a/src/ruby/bin/math_server.rb b/src/ruby/bin/math_server.rb
new file mode 100644
index 0000000..72a1f6b
--- /dev/null
+++ b/src/ruby/bin/math_server.rb
@@ -0,0 +1,166 @@
+# Copyright 2014, 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.
+
+#!/usr/bin/env ruby
+#
+# 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 'grpc/generic/service'
+require 'grpc/generic/rpc_server'
+require 'math.pb'
+
+# Holds state for a fibonacci series
+class Fibber
+
+ def initialize(limit)
+ raise "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 == 0 || 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)
+ raise 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 == 0
+ # To send non-OK status handlers raise a StatusError with the code and
+ # and detail they want sent as a Status.
+ raise 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 { |x| x.num }
+ sum = nums.inject { |sum,x| sum + x }
+ Math::Num.new(:num => sum)
+ end
+
+ def fib(fib_args, call)
+ if fib_args.limit < 1
+ raise 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|
+ 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
+ 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 main
+ host_port = 'localhost:7070'
+ if ARGV.size > 0
+ host_port = ARGV[0]
+ end
+
+ s = GRPC::RpcServer.new()
+ s.add_http2_port(host_port)
+ s.handle(Calculator)
+ s.run
+end
+
+main