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/* -*- c++ -*- */
/*
* Copyright 2013,2014 Free Software Foundation, Inc.
*
* This file is part of GNU Radio.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_ZEROMQ_PUB_SINK_H
#define INCLUDED_ZEROMQ_PUB_SINK_H
#include <gnuradio/sync_block.h>
#include <gnuradio/zeromq/api.h>
namespace gr {
namespace zeromq {
/*!
* \brief Sink the contents of a stream to a ZMQ PUB socket
* \ingroup zeromq
*
* \details
* This block acts as a streaming sink for a GNU Radio flowgraph
* and writes its contents to a ZMQ PUB socket. A PUB socket may
* have subscribers and will pass all incoming stream data to each
* subscriber with a matching key. If the publisher's key is set to
* "GNURadio", the following example subscriber keys will match: "G",
* "GN", .., "GNURadio". In other words, the subscriber must contain
* the first set of characters from the publisher's key. If the subscriber
* sets an empty key "", it will accept all input messages from the
* publisher (including the key itself if one is set). Subscribers
* can either be another gr-zeromq source block or a non-GNU Radio
* ZMQ socket.
*/
class ZEROMQ_API pub_sink : virtual public gr::sync_block
{
public:
typedef boost::shared_ptr<pub_sink> sptr;
/*!
* \brief Return a shared_ptr to a new instance of zeromq::pub_sink.
*
* \param itemsize Size of a stream item in bytes.
* \param vlen Vector length of the input items. Note that one vector is one item.
* \param address ZMQ socket address specifier.
* \param timeout Receive timeout in milliseconds, default is 100ms, 1us increments.
* \param pass_tags Whether sink will serialize and pass tags over the link.
* \param hwm High Watermark to configure the socket to (-1 => zmq's default)
* \param key Prepend a key/topic to the start of each message (default is none)
*/
static sptr make(size_t itemsize,
size_t vlen,
char* address,
int timeout = 100,
bool pass_tags = false,
int hwm = -1,
const std::string& key = "");
/*!
* \brief Return a std::string of ZMQ_LAST_ENDPOINT from the underlying ZMQ socket.
*/
virtual std::string last_endpoint() = 0;
};
} // namespace zeromq
} // namespace gr
#endif /* INCLUDED_ZEROMQ_PUB_SINK_H */
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