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/*
*
* 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.
*
*/
'use strict';
var _ = require('lodash');
var grpc = require('..');
var examples = grpc.load(__dirname + '/stock.proto').examples;
function getLastTradePrice(call, callback) {
callback(null, {symbol: call.request.symbol, price: 88});
}
function watchFutureTrades(call) {
for (var i = 0; i < call.request.num_trades_to_watch; i++) {
call.write({price: 88.00 + i * 10.00});
}
call.end();
}
function getHighestTradePrice(call, callback) {
var trades = [];
call.on('data', function(data) {
trades.push({symbol: data.symbol, price: _.random(0, 100)});
});
call.on('end', function() {
if(_.isEmpty(trades)) {
callback(null, {});
} else {
callback(null, _.max(trades, function(trade){return trade.price;}));
}
});
}
function getLastTradePriceMultiple(call) {
call.on('data', function(data) {
call.write({price: 88});
});
call.on('end', function() {
call.end();
});
}
var stockServer = new grpc.Server();
stockServer.addProtoService(examples.Stock.service, {
getLastTradePrice: getLastTradePrice,
getLastTradePriceMultiple: getLastTradePriceMultiple,
watchFutureTrades: watchFutureTrades,
getHighestTradePrice: getHighestTradePrice
});
if (require.main === module) {
stockServer.bind('0.0.0.0:50051');
stockServer.listen();
}
module.exports = stockServer;
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