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Added comments to route_guide_client.js

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murgatroid99 2015-02-20 11:34:47 -08:00
parent 413119058b
commit ce0cfef3a3
1 changed files with 36 additions and 0 deletions
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36
examples/route_guide_client.js
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@ -36,6 +36,11 @@ 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) {
@ -65,6 +70,12 @@ function runGetFeature(callback) {
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: {
@ -86,6 +97,12 @@ function runListFeatures(callback) {
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) {
fs.readFile(__dirname + '/route_guide_db.json', function(err, data) {
if (err) callback(err);
@ -102,7 +119,18 @@ function runRecordRoute(callback) {
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);
@ -125,6 +153,11 @@ function runRecordRoute(callback) {
});
}
/**
* 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) {
@ -168,6 +201,9 @@ function runRouteChat(callback) {
call.end();
}
/**
* Run all of the demos in order
*/
function main() {
async.series([
runGetFeature,