dc15dc32bb
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1052740 13f79535-47bb-0310-9956-ffa450edef68
150 lines
4 KiB
C++
150 lines
4 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/* $Rev$ $Date$ */
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/**
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* XMPP chat sender component implementation.
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*/
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#include "string.hpp"
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#include "function.hpp"
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#include "list.hpp"
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#include "value.hpp"
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#include "monad.hpp"
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#include "parallel.hpp"
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#include "xmpp.hpp"
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namespace tuscany {
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namespace chat {
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namespace sender {
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/**
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* Post an item to an XMPP JID.
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*/
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const failable<value> post(const list<value>& params, XMPPClient& xc) {
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const value to = car<value>(car(params));
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const value val = cadr(params);
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debug(to, "chat::post::jid");
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debug(val, "chat::post::value");
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const failable<bool> r = post(to, val, xc);
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if (!hasContent(r))
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return mkfailure<value>(reason(r));
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return value(mklist<value>(to));
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}
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/**
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* Subscribe and listen to an XMPP session.
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*/
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class noop {
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public:
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noop() {
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}
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const failable<bool> operator()(unused const value& jid, unused const value& val, unused XMPPClient& xc) const {
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return true;
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}
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};
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class subscribe {
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public:
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subscribe(XMPPClient& xc) : xc(xc) {
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}
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const failable<bool> operator()() const {
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gc_pool pool;
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debug("chat::subscribe::listen");
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const failable<bool> r = listen(noop(), const_cast<XMPPClient&>(xc));
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debug("chat::subscribe::stopped");
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return r;
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}
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private:
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const lambda<failable<bool>(const value&, const value&, XMPPClient&)> l;
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XMPPClient xc;
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};
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/**
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* Chatter component lambda function
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*/
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class chatSender {
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public:
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chatSender(XMPPClient& xc, worker& w) : xc(xc), w(w) {
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}
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const value operator()(const list<value>& params) const {
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const tuscany::value func(car(params));
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if (func == "post")
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return post(cdr(params), const_cast<XMPPClient&>(xc));
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// Stop the chat sender component
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if (func != "stop")
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return tuscany::mkfailure<tuscany::value>();
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debug("chat::sender::stop");
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// Disconnect and shutdown the worker thread
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disconnect(const_cast<XMPPClient&>(xc));
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cancel(const_cast<worker&>(w));
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debug("chat::sender::stopped");
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return failable<value>(value(lambda<value(const list<value>&)>()));
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}
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private:
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const XMPPClient xc;
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worker w;
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};
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/**
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* Start the component.
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*/
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const failable<value> start(const list<value>& params) {
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// Extract the the XMPP JID and password
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const list<value> props = params;
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const value jid = ((lambda<value(list<value>)>)car(props))(list<value>());
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const value pass = ((lambda<value(list<value>)>)cadr(props))(list<value>());
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// Create an XMPP client session
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XMPPClient xc(jid, pass, false);
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const failable<bool> r = connect(xc);
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if (!hasContent(r))
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return mkfailure<value>(reason(r));
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// Listen and relay messages in a worker thread
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worker w(3);
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submit<failable<bool> >(w, lambda<failable<bool>()>(subscribe(xc)));
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// Return the chat sender component lambda function
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return value(lambda<value(const list<value>&)>(chatSender(xc, w)));
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}
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}
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}
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}
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extern "C" {
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const tuscany::value apply(const tuscany::list<tuscany::value>& params) {
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const tuscany::value func(car(params));
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if (func == "start")
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return tuscany::chat::sender::start(cdr(params));
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return tuscany::mkfailure<tuscany::value>();
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}
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}
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