| /* |
| * 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. |
| */ |
| |
| /* $Rev$ $Date$ */ |
| |
| /** |
| * XMPP chat sender/receiver component implementation. |
| */ |
| |
| #include "string.hpp" |
| #include "function.hpp" |
| #include "list.hpp" |
| #include "value.hpp" |
| #include "monad.hpp" |
| #include "parallel.hpp" |
| #include "xmpp.hpp" |
| |
| namespace tuscany { |
| namespace chat { |
| namespace sendreceiver { |
| |
| /** |
| * Post an item to an XMPP JID. |
| */ |
| const failable<value> post(const list<value>& params, XMPPClient& xc) { |
| const value to = car<value>(car(params)); |
| const value val = cadr(params); |
| debug(to, "chat::post::jid"); |
| debug(val, "chat::post::value"); |
| const failable<bool> r = post(to, val, xc); |
| if (!hasContent(r)) |
| return mkfailure<value>(reason(r)); |
| return value(mklist<value>(to)); |
| } |
| |
| /** |
| * A relay function that posts the XMPP messages it receives to a relay component reference. |
| */ |
| class relay { |
| public: |
| relay(const lambda<value(const list<value>&)>& rel) : rel(rel) { |
| } |
| |
| const failable<bool> operator()(const value& jid, const value& val, unused XMPPClient& xc) const { |
| if (isNil(rel)) |
| return true; |
| debug(jid, "chat::relay::jid"); |
| debug(val, "chat::relay::value"); |
| const value res = rel(mklist<value>("post", mklist<value>(jid), val)); |
| return true; |
| } |
| |
| private: |
| const lambda<value(const list<value>&)> rel; |
| }; |
| |
| /** |
| * Subscribe and listen to an XMPP session. |
| */ |
| class subscribe { |
| public: |
| subscribe(const lambda<failable<bool>(const value&, const value&, XMPPClient&)>& l, XMPPClient& xc) : l(l), xc(xc) { |
| } |
| |
| const failable<bool> operator()() const { |
| gc_pool pool; |
| debug("chat::subscribe::listen"); |
| const failable<bool> r = listen(l, const_cast<XMPPClient&>(xc)); |
| debug("chat::subscribe::stopped"); |
| return r; |
| } |
| |
| private: |
| const lambda<failable<bool>(const value&, const value&, XMPPClient&)> l; |
| XMPPClient xc; |
| }; |
| |
| /** |
| * Chat sender/receiver component lambda function |
| */ |
| class chatSenderReceiver { |
| public: |
| chatSenderReceiver(XMPPClient& xc, worker& w) : xc(xc), w(w) { |
| } |
| |
| const value operator()(const list<value>& params) const { |
| const tuscany::value func(car(params)); |
| if (func == "post") |
| return post(cdr(params), const_cast<XMPPClient&>(xc)); |
| |
| // Stop the chat sender/receiver component |
| if (func != "stop") |
| return tuscany::mkfailure<tuscany::value>(); |
| debug("chat::sendreceiver::stop"); |
| |
| // Disconnect and shutdown the worker thread |
| disconnect(const_cast<XMPPClient&>(xc)); |
| cancel(const_cast<worker&>(w)); |
| debug("chat::sendreceiver::stopped"); |
| |
| return failable<value>(value(lambda<value(const list<value>&)>())); |
| } |
| |
| private: |
| const XMPPClient xc; |
| worker w; |
| }; |
| |
| /** |
| * Start the component. |
| */ |
| const failable<value> start(const list<value>& params) { |
| // Extract the relay reference and the XMPP JID and password |
| const bool hasRelay = !isNil(cddr(params)); |
| const value rel = hasRelay? car(params) : value(lambda<value(const list<value>&)>()); |
| const list<value> props = hasRelay? cdr(params) : params; |
| const value jid = ((lambda<value(list<value>)>)car(props))(list<value>()); |
| const value pass = ((lambda<value(list<value>)>)cadr(props))(list<value>()); |
| |
| // Create an XMPP client session |
| XMPPClient xc(jid, pass, false); |
| const failable<bool> r = connect(xc); |
| if (!hasContent(r)) |
| return mkfailure<value>(reason(r)); |
| |
| // Listen and relay messages in a worker thread |
| worker w(3); |
| const lambda<failable<bool>(const value&, const value&, XMPPClient&)> rl = relay(rel); |
| submit<failable<bool> >(w, lambda<failable<bool>()>(subscribe(rl, xc))); |
| |
| // Return the chat sender/receiver component lambda function |
| return value(lambda<value(const list<value>&)>(chatSenderReceiver(xc, w))); |
| } |
| |
| } |
| } |
| } |
| |
| extern "C" { |
| |
| const tuscany::value apply(const tuscany::list<tuscany::value>& params) { |
| const tuscany::value func(car(params)); |
| if (func == "start") |
| return tuscany::chat::sendreceiver::start(cdr(params)); |
| return tuscany::mkfailure<tuscany::value>(); |
| } |
| |
| } |