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Diffstat (limited to 'examples/node/route_guide/route_guide_client.js')
-rw-r--r-- | examples/node/route_guide/route_guide_client.js | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/examples/node/route_guide/route_guide_client.js b/examples/node/route_guide/route_guide_client.js new file mode 100644 index 0000000000..60c47a429d --- /dev/null +++ b/examples/node/route_guide/route_guide_client.js @@ -0,0 +1,231 @@ +// 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. + +var async = require('async'); +var fs = require('fs'); +var parseArgs = require('minimist'); +var path = require('path'); +var _ = require('underscore'); +var grpc = require('grpc'); +var examples = grpc.load(__dirname + '/route_guide.proto').examples; +var client = new examples.RouteGuide('localhost:50051'); + +var COORD_FACTOR = 1e7; + +/** + * Run the getFeature demo. Calls getFeature with a point known to have a + * feature and a point known not to have a feature. + * @param {function} callback Called when this demo is complete + */ +function runGetFeature(callback) { + var next = _.after(2, callback); + function featureCallback(error, feature) { + if (error) { + callback(error); + } + if (feature.name === '') { + console.log('Found no feature at ' + + feature.location.latitude/COORD_FACTOR + ', ' + + feature.location.longitude/COORD_FACTOR); + } else { + console.log('Found feature called "' + feature.name + '" at ' + + feature.location.latitude/COORD_FACTOR + ', ' + + feature.location.longitude/COORD_FACTOR); + } + next(); + } + var point1 = { + latitude: 409146138, + longitude: -746188906 + }; + var point2 = { + latitude: 0, + longitude: 0 + }; + client.getFeature(point1, featureCallback); + client.getFeature(point2, featureCallback); +} + +/** + * Run the listFeatures demo. Calls listFeatures with a rectangle containing all + * of the features in the pre-generated database. Prints each response as it + * comes in. + * @param {function} callback Called when this demo is complete + */ +function runListFeatures(callback) { + var rectangle = { + lo: { + latitude: 400000000, + longitude: -750000000 + }, + hi: { + latitude: 420000000, + longitude: -730000000 + } + }; + console.log('Looking for features between 40, -75 and 42, -73'); + var call = client.listFeatures(rectangle); + call.on('data', function(feature) { + console.log('Found feature called "' + feature.name + '" at ' + + feature.location.latitude/COORD_FACTOR + ', ' + + feature.location.longitude/COORD_FACTOR); + }); + call.on('end', callback); +} + +/** + * Run the recordRoute demo. Sends several randomly chosen points from the + * pre-generated feature database with a variable delay in between. Prints the + * statistics when they are sent from the server. + * @param {function} callback Called when this demo is complete + */ +function runRecordRoute(callback) { + var argv = parseArgs(process.argv, { + string: 'db_path' + }); + fs.readFile(path.resolve(argv.db_path), function(err, data) { + if (err) callback(err); + var feature_list = JSON.parse(data); + + var num_points = 10; + var call = client.recordRoute(function(error, stats) { + if (error) { + callback(error); + } + console.log('Finished trip with', stats.point_count, 'points'); + console.log('Passed', stats.feature_count, 'features'); + console.log('Travelled', stats.distance, 'meters'); + console.log('It took', stats.elapsed_time, 'seconds'); + callback(); + }); + /** + * Constructs a function that asynchronously sends the given point and then + * delays sending its callback + * @param {number} lat The latitude to send + * @param {number} lng The longitude to send + * @return {function(function)} The function that sends the point + */ + function pointSender(lat, lng) { + /** + * Sends the point, then calls the callback after a delay + * @param {function} callback Called when complete + */ + return function(callback) { + console.log('Visiting point ' + lat/COORD_FACTOR + ', ' + + lng/COORD_FACTOR); + call.write({ + latitude: lat, + longitude: lng + }); + _.delay(callback, _.random(500, 1500)); + }; + } + var point_senders = []; + for (var i = 0; i < num_points; i++) { + var rand_point = feature_list[_.random(0, feature_list.length - 1)]; + point_senders[i] = pointSender(rand_point.location.latitude, + rand_point.location.longitude); + } + async.series(point_senders, function() { + call.end(); + }); + }); +} + +/** + * Run the routeChat demo. Send some chat messages, and print any chat messages + * that are sent from the server. + * @param {function} callback Called when the demo is complete + */ +function runRouteChat(callback) { + var call = client.routeChat(); + call.on('data', function(note) { + console.log('Got message "' + note.message + '" at ' + + note.location.latitude + ', ' + note.location.longitude); + }); + + call.on('end', callback); + + var notes = [{ + location: { + latitude: 0, + longitude: 0 + }, + message: 'First message' + }, { + location: { + latitude: 0, + longitude: 1 + }, + message: 'Second message' + }, { + location: { + latitude: 1, + longitude: 0 + }, + message: 'Third message' + }, { + location: { + latitude: 0, + longitude: 0 + }, + message: 'Fourth message' + }]; + for (var i = 0; i < notes.length; i++) { + var note = notes[i]; + console.log('Sending message "' + note.message + '" at ' + + note.location.latitude + ', ' + note.location.longitude); + call.write(note); + } + call.end(); +} + +/** + * Run all of the demos in order + */ +function main() { + async.series([ + runGetFeature, + runListFeatures, + runRecordRoute, + runRouteChat + ]); +} + +if (require.main === module) { + main(); +} + +exports.runGetFeature = runGetFeature; + +exports.runListFeatures = runListFeatures; + +exports.runRecordRoute = runRecordRoute; + +exports.runRouteChat = runRouteChat; |