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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.
*
*/
#include "options.hpp"
#include <proton/default_container.hpp>
#include <proton/messaging_handler.hpp>
#include <iostream>
#include "fake_cpp11.hpp"
// Send messages at a constant rate one per interval. cancel after a timeout.
// This example uses only C++03 features.
class scheduled_sender : public proton::messaging_handler {
private:
std::string url;
proton::sender sender;
proton::duration interval, timeout;
bool ready, canceled;
struct tick_fn : public proton::void_function0 {
scheduled_sender& parent;
tick_fn(scheduled_sender& ss) : parent(ss) {}
void operator()() { parent.tick(); }
};
struct cancel_fn : public proton::void_function0 {
scheduled_sender& parent;
cancel_fn(scheduled_sender& ss) : parent(ss) {}
void operator()() { parent.cancel(); }
};
tick_fn do_tick;
cancel_fn do_cancel;
public:
scheduled_sender(const std::string &s, double d, double t) :
url(s),
interval(int(d*proton::duration::SECOND.milliseconds())), // Send interval.
timeout(int(t*proton::duration::SECOND.milliseconds())), // Cancel after timeout.
ready(true), // Ready to send.
canceled(false), // Canceled.
do_tick(*this),
do_cancel(*this)
{}
void on_container_start(proton::container &c) OVERRIDE {
sender = c.open_sender(url);
c.schedule(timeout, do_cancel); // Call this->cancel after timeout.
c.schedule(interval, do_tick); // Start regular ticks every interval.
}
void cancel() {
canceled = true;
sender.connection().close();
}
void tick() {
if (!canceled) {
sender.container().schedule(interval, do_tick); // Next tick
if (sender.credit() > 0) // Only send if we have credit
send();
else
ready = true; // Set the ready flag, send as soon as we get credit.
}
}
void on_sendable(proton::sender &) OVERRIDE {
if (ready) // We have been ticked since the last send.
send();
}
void send() {
std::cout << "send" << std::endl;
sender.send(proton::message("ping"));
ready = false;
}
};
int main(int argc, char **argv) {
std::string address("127.0.0.1:5672/examples");
double interval = 1.0;
double timeout = 5.0;
example::options opts(argc, argv);
opts.add_value(address, 'a', "address", "connect and send to URL", "URL");
opts.add_value(interval, 'i', "interval", "send a message every INTERVAL seconds", "INTERVAL");
opts.add_value(timeout, 't', "timeout", "stop after T seconds", "T");
try {
opts.parse();
scheduled_sender h(address, interval, timeout);
proton::default_container(h).run();
return 0;
} catch (const example::bad_option& e) {
std::cout << opts << std::endl << e.what() << std::endl;
} catch (const std::exception& e) {
std::cerr << e.what() << std::endl;
}
return 1;
}
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