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/// Licensed to the Apache Software Foundation (ASF) under one
/// or more contributor license agreements. See the NOTICE file
/// distributed with this work for additional information
/// regarding copyright ownership. The ASF licenses this file
/// to you under the Apache License, Version 2.0 (the
/// "License"); you may not use this file except in compliance
/// with the License. You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing,
/// software distributed under the License is distributed on an
/// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
/// KIND, either express or implied. See the License for the
/// specific language governing permissions and limitations
/// under the License.
import 'dart:async';
import 'dart:io';
import 'package:args/args.dart';
import 'package:logging/logging.dart';
import 'package:thrift/thrift.dart';
import 'package:thrift/thrift_console.dart';
import 'package:tutorial/tutorial.dart';
import 'package:shared/shared.dart';
TProtocol _protocol;
TProcessor _processor;
WebSocket _webSocket;
main(List<String> args) {
Logger.root.level = Level.ALL;
Logger.root.onRecord.listen((LogRecord rec) {
print('${rec.level.name}: ${rec.time}: ${rec.message}');
});
var parser = new ArgParser();
parser.addOption('port', defaultsTo: '9090', help: 'The port to listen on');
parser.addOption('type',
defaultsTo: 'ws',
allowed: ['ws', 'tcp'],
help: 'The type of socket',
allowedHelp: {'ws': 'WebSocket', 'tcp': 'TCP Socket'});
ArgResults results;
try {
results = parser.parse(args);
} catch (e) {
results = null;
}
if (results == null) {
print(parser.usage);
exit(0);
}
int port = int.parse(results['port']);
String socketType = results['type'];
if (socketType == 'tcp') {
_runTcpServer(port);
} else if (socketType == 'ws') {
_runWebSocketServer(port);
}
}
Future _runWebSocketServer(int port) async {
var httpServer = await HttpServer.bind('127.0.0.1', port);
print('listening for WebSocket connections on $port');
httpServer.listen((HttpRequest request) async {
if (request.uri.path == '/ws') {
_webSocket = await WebSocketTransformer.upgrade(request);
await _initProcessor(new TWebSocket(_webSocket));
} else {
print('Invalid path: ${request.uri.path}');
}
});
}
Future _runTcpServer(int port) async {
var serverSocket = await ServerSocket.bind('127.0.0.1', port);
print('listening for TCP connections on $port');
Socket socket = await serverSocket.first;
await _initProcessor(new TTcpSocket(socket));
}
Future _initProcessor(TSocket socket) async {
TServerSocketTransport transport = new TServerSocketTransport(socket);
transport.onIncomingMessage.listen(_processMessage);
_processor = new CalculatorProcessor(new CalculatorServer());
_protocol = new TBinaryProtocol(transport);
await _protocol.transport.open();
print('connected');
}
Future _processMessage(_) async {
_processor.process(_protocol, _protocol);
}
class CalculatorServer implements Calculator {
final Map<int, SharedStruct> _log = {};
Future ping() async {
print('ping()');
}
Future<int> add(int num1, int num2) async {
print('add($num1, $num2)');
return num1 + num2;
}
Future<int> calculate(int logid, Work work) async {
print('calulate($logid, ${work.toString()})');
int val;
switch (work.op) {
case Operation.ADD:
val = work.num1 + work.num2;
break;
case Operation.SUBTRACT:
val = work.num1 - work.num2;
break;
case Operation.MULTIPLY:
val = work.num1 * work.num2;
break;
case Operation.DIVIDE:
if (work.num2 == 0) {
var x = new InvalidOperation();
x.whatOp = work.op;
x.why = 'Cannot divide by 0';
throw x;
}
val = (work.num1 / work.num2).floor();
break;
}
var log = new SharedStruct();
log.key = logid;
log.value = '$val "${work.comment}"';
this._log[logid] = log;
return val;
}
Future zip() async {
print('zip()');
}
Future<SharedStruct> getStruct(int key) async {
print('getStruct($key)');
return _log[key];
}
}
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