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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.
*/
/* $Rev$ $Date$ */
/**
* XMPP chat sender/receiver component implementation.
*/
#define WANT_HTTPD_LOG 1
#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>(r);
return value(mklist<value>(to));
}
/**
* Start the component.
*/
const failable<value> start(const list<value>& params) {
// Extract the relay reference and the XMPP JID and password
const bool hasRelay = !isNull(cddr(params));
const lvvlambda rel = hasRelay? (lvvlambda)car(params) : lvvlambda();
const list<value> props = hasRelay? cdr(params) : params;
const value jid = ((lvvlambda)car(props))(nilListValue);
const value pass = ((lvvlambda)cadr(props))(nilListValue);
// Create an XMPP client session
XMPPClient xc(jid, pass, false);
const failable<bool> r = connect(xc);
if (!hasContent(r))
return mkfailure<value>(r);
// Listen and relay messages in a worker thread
worker w(3);
const lambda<const failable<bool>(const value&, const value&, XMPPClient&)> rl = [rel](const value& jid, const value& val, unused XMPPClient& xc) -> const failable<bool> {
// A relay function that posts the XMPP messages it receives to a relay component reference.
if (isNull(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;
};
// Subscribe and listen to the XMPP session.
const lambda<const failable<bool>()> subscribe = [rl, xc]() -> const failable<bool> {
const gc_pool pool;
debug("chat::subscribe::listen");
const failable<bool> r = listen(rl, const_cast<XMPPClient&>(xc));
debug("chat::subscribe::stopped");
return r;
};
submit<failable<bool> >(w, subscribe);
// Return the chat sender/receiver component lambda function
const lvvlambda senderReceiver = [xc, w](const list<value>& params) -> const value {
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 mkfailure<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(lvvlambda()));
};
return value(senderReceiver);
}
}
}
}
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>();
}
}
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