Serialization functions for ZMQ (v3 or above) (in #include <mrpt/serialization/serialization_zmq.h>)¶

// namespaces

namespace mrpt::serialization::internal;

// global functions

template <typename ZMQ_SOCKET_TYPE>
void mrpt::serialization::mrpt_send_to_zmq(
    ZMQ_SOCKET_TYPE zmq_socket,
    const mrpt::serialization::CSerializable& obj,
    const size_t max_packet_len = 0
    );

template <typename ZMQ_SOCKET_TYPE, typename VECTOR_MSG_T>
bool mrpt::serialization::mrpt_recv_from_zmq_buf(
    ZMQ_SOCKET_TYPE zmq_socket,
    VECTOR_MSG_T& out_lst_msgs,
    mrpt::io::CMemoryStream& target_buf,
    bool dont_wait,
    size_t* rx_obj_length_in_bytes
    );

template <typename ZMQ_SOCKET_TYPE>
mrpt::serialization::CSerializable::Ptr mrpt::serialization::mrpt_recv_from_zmq(
    ZMQ_SOCKET_TYPE zmq_socket,
    bool dont_wait = false,
    size_t* rx_obj_length_in_bytes = nullptr
    );

template <typename ZMQ_SOCKET_TYPE>
bool mrpt::serialization::mrpt_recv_from_zmq_into(
    ZMQ_SOCKET_TYPE zmq_socket,
    mrpt::serialization::CSerializable& target_object,
    bool dont_wait = false,
    size_t* rx_obj_length_in_bytes = nullptr
    );

Global Functions¶

template <typename ZMQ_SOCKET_TYPE>
void mrpt::serialization::mrpt_send_to_zmq(
    ZMQ_SOCKET_TYPE zmq_socket,
    const mrpt::serialization::CSerializable& obj,
    const size_t max_packet_len = 0
    )

Send an MRPT object to a ZMQ socket.

Including <mrpt/serialization/serialization_zmq.h> requires libzmq to be available in your system and linked to your user code. This function can be used even if MRPT was built without ZMQ support, thanks to the use of templates.

See examples of usage in https://github.com/MRPT/mrpt/tree/master/doc/mrpt-zeromq-example

Parameters:

obj	The object to be serialized and sent to the socket.
zmq_socket	The zmq socket object.
max_packet_len	The object will be split into a series of ZMQ “message parts” of this maximum length (in bytes). Default=0, which means do not split in parts.
std::exception	If the object finds any critical error during serialization or on ZMQ errors.

template <typename ZMQ_SOCKET_TYPE, typename VECTOR_MSG_T>
bool mrpt::serialization::mrpt_recv_from_zmq_buf(
    ZMQ_SOCKET_TYPE zmq_socket,
    VECTOR_MSG_T& out_lst_msgs,
    mrpt::io::CMemoryStream& target_buf,
    bool dont_wait,
    size_t* rx_obj_length_in_bytes
    )

Users may normally call mrpt_recv_from_zmq() and mrpt_recv_from_zmq_into().

This function just stores the received data into a memory buffer without parsing it into an MRPT object.

Returns:

false on any error

template <typename ZMQ_SOCKET_TYPE>
mrpt::serialization::CSerializable::Ptr mrpt::serialization::mrpt_recv_from_zmq(
    ZMQ_SOCKET_TYPE zmq_socket,
    bool dont_wait = false,
    size_t* rx_obj_length_in_bytes = nullptr
    )

Receives an MRPT object from a ZMQ socket, determining the type of the object on-the-fly.

Including <mrpt/serialization/serialization_zmq.h> requires libzmq to be available in your system and linked to your user code. This function can be used even if MRPT was built without ZMQ support, thanks to the use of templates.

See examples of usage in https://github.com/MRPT/mrpt/tree/master/doc/mrpt-zeromq-example

Parameters:

zmq_socket	The zmq socket object.
dont_wait	If true, will fail if there is no data ready to be read. If false (default) this function will block until data arrives.
rx_obj_length_in_bytes	If non-nullptr, the object length will be stored here.
std::exception	If the object finds any critical error during de-serialization.

Returns:

An empty smart pointer if there was any error. The received object if all went OK.