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#!/usr/bin/env ruby
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# Copyright 2015, Google Inc.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following disclaimer
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# in the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# Sample app that connects to a Route Guide service.
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#
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# Usage: $ path/to/route_guide_client.rb path/to/route_guide_db.json &
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this_dir = File.expand_path(File.dirname(__FILE__))
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lib_dir = File.join(File.dirname(this_dir), 'lib')
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$LOAD_PATH.unshift(lib_dir) unless $LOAD_PATH.include?(lib_dir)
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require 'grpc'
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require 'multi_json'
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require 'route_guide_services_pb'
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include Routeguide
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GET_FEATURE_POINTS = [
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Point.new(latitude: 409_146_138, longitude: -746_188_906),
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Point.new(latitude: 0, longitude: 0)
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]
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# runs a GetFeature rpc.
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#
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# - once with a point known to be present in the sample route database
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# - once with a point that is not in the sample database
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def run_get_feature(stub)
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p 'GetFeature'
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p '----------'
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GET_FEATURE_POINTS.each do |pt|
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resp = stub.get_feature(pt)
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if resp.name != ''
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p "- found '#{resp.name}' at #{pt.inspect}"
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else
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p "- found nothing at #{pt.inspect}"
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end
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end
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end
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LIST_FEATURES_RECT = Rectangle.new(
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lo: Point.new(latitude: 400_000_000, longitude: -750_000_000),
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hi: Point.new(latitude: 420_000_000, longitude: -730_000_000))
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# runs a ListFeatures rpc.
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#
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# - the rectangle to chosen to include most of the known features
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# in the sample db.
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def run_list_features(stub)
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p 'ListFeatures'
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p '------------'
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resps = stub.list_features(LIST_FEATURES_RECT)
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resps.each do |r|
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p "- found '#{r.name}' at #{r.location.inspect}"
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end
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end
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# RandomRoute provides an Enumerable that yields a random 'route' of points
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# from a list of Features.
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class RandomRoute
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def initialize(features, size)
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@features = features
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@size = size
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end
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# yields a point, waiting between 0 and 1 seconds between each yield
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#
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# @return an Enumerable that yields a random point
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def each
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return enum_for(:each) unless block_given?
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@size.times do
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json_feature = @features[rand(0..@features.length)]
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next if json_feature.nil?
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location = json_feature['location']
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pt = Point.new(
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Hash[location.each_pair.map { |k, v| [k.to_sym, v] }])
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p "- next point is #{pt.inspect}"
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yield pt
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sleep(rand(0..1))
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end
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end
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end
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# runs a RecordRoute rpc.
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#
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# - the rectangle to chosen to include most of the known features
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# in the sample db.
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def run_record_route(stub, features)
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p 'RecordRoute'
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p '-----------'
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points_on_route = 10 # arbitrary
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reqs = RandomRoute.new(features, points_on_route)
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resp = stub.record_route(reqs.each)
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p "summary: #{resp.inspect}"
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end
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ROUTE_CHAT_NOTES = [
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RouteNote.new(message: 'doh - a deer',
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location: Point.new(latitude: 0, longitude: 0)),
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RouteNote.new(message: 'ray - a drop of golden sun',
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location: Point.new(latitude: 0, longitude: 1)),
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RouteNote.new(message: 'me - the name I call myself',
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location: Point.new(latitude: 1, longitude: 0)),
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RouteNote.new(message: 'fa - a longer way to run',
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location: Point.new(latitude: 1, longitude: 1)),
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RouteNote.new(message: 'soh - with needle and a thread',
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location: Point.new(latitude: 0, longitude: 1))
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]
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# runs a RouteChat rpc.
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#
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# sends a canned set of route notes and prints out the responses.
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def run_route_chat(stub)
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p 'Route Chat'
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p '----------'
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# TODO: decouple sending and receiving, i.e have the response enumerator run
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# on its own thread.
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resps = stub.route_chat(ROUTE_CHAT_NOTES)
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resps.each { |r| p "received #{r.inspect}" }
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end
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def main
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stub = RouteGuide::Stub.new('localhost:50051', :this_channel_is_insecure)
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run_get_feature(stub)
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run_list_features(stub)
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run_route_chat(stub)
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if ARGV.length == 0
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p 'no feature database; skipping record_route'
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exit
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end
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raw_data = []
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File.open(ARGV[0]) do |f|
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raw_data = MultiJson.load(f.read)
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end
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run_record_route(stub, raw_data)
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end
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main
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