'\" t
.\"     Title: zmonitor
.\"    Author: [see the "AUTHORS" section]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 03/02/2024
.\"    Manual: CZMQ Manual
.\"    Source: CZMQ 4.2.1
.\"  Language: English
.\"
.TH "ZMONITOR" "3" "03/02/2024" "CZMQ 4\&.2\&.1" "CZMQ Manual"
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.SH "NAME"
zmonitor \- Class for socket event monitor
.SH "SYNOPSIS"
.sp
.nf
//  Create new zmonitor actor instance to monitor a zsock_t socket:
//
//      zactor_t *monitor = zactor_new (zmonitor, mysocket);
//
//  Destroy zmonitor instance\&.
//
//      zactor_destroy (&monitor);
//
//  Enable verbose logging of commands and activity\&.
//
//      zstr_send (monitor, "VERBOSE");
//
//  Listen to monitor event type (zero or types, ending in NULL):
//      zstr_sendx (monitor, "LISTEN", type, \&.\&.\&., NULL);
//
//      Events:
//      CONNECTED
//      CONNECT_DELAYED
//      CONNECT_RETRIED
//      LISTENING
//      BIND_FAILED
//      ACCEPTED
//      ACCEPT_FAILED
//      CLOSED
//      CLOSE_FAILED
//      DISCONNECTED
//      MONITOR_STOPPED
//      ALL
//
//  Start monitor; after this, any further LISTEN commands are ignored\&.
//
//      zstr_send (monitor, "START");
//      zsock_wait (monitor);
//
//  Receive next monitor event:
//
//      zmsg_t *msg = zmsg_recv (monitor);
//
//  This is the zmonitor constructor as a zactor_fn; the argument can be
//  a zactor_t, zsock_t, or libzmq void * socket:
CZMQ_EXPORT void
    zmonitor (zsock_t *pipe, void *sock);

//  Selftest
CZMQ_EXPORT void
    zmonitor_test (bool verbose);
Please add \*(Aq@interface\*(Aq section in \*(Aq\&./\&.\&./src/zmonitor\&.c\*(Aq\&.
.fi
.SH "DESCRIPTION"
.sp
The zmonitor actor provides an API for obtaining socket events such as connected, listen, disconnected, etc\&. Socket events are only available for sockets connecting or bound to ipc:// and tcp:// endpoints\&.
.sp
This class wraps the ZMQ socket monitor API, see zmq_socket_monitor for details\&. Works on all versions of libzmq from 3\&.2 onwards\&. This class replaces zproxy_v2, and is meant for applications that use the CZMQ v3 API (meaning, zsock)\&.
.SH "EXAMPLE"
.PP
\fBFrom zmonitor_test method\fR. 
.sp
.if n \{\
.RS 4
.\}
.nf
zsock_t *client = zsock_new (ZMQ_DEALER);
assert (client);
zactor_t *clientmon = zactor_new (zmonitor, client);
assert (clientmon);
if (verbose)
    zstr_sendx (clientmon, "VERBOSE", NULL);
zstr_sendx (clientmon, "LISTEN", "LISTENING", "ACCEPTED", NULL);
#if defined (ZMQ_EVENT_HANDSHAKE_SUCCEED)
zstr_sendx (clientmon, "LISTEN", "HANDSHAKE_SUCCEED", NULL);
#endif
#if defined (ZMQ_EVENT_HANDSHAKE_SUCCEEDED)
zstr_sendx (clientmon, "LISTEN", "HANDSHAKE_SUCCEEDED", NULL);
#endif
zstr_sendx (clientmon, "START", NULL);
zsock_wait (clientmon);

zsock_t *server = zsock_new (ZMQ_DEALER);
assert (server);
zactor_t *servermon = zactor_new (zmonitor, server);
assert (servermon);
if (verbose)
    zstr_sendx (servermon, "VERBOSE", NULL);
zstr_sendx (servermon, "LISTEN", "CONNECTED", "DISCONNECTED", NULL);
zstr_sendx (servermon, "START", NULL);
zsock_wait (servermon);

//  Allow a brief time for the message to get there\&.\&.\&.
zmq_poll (NULL, 0, 200);

//  Check client is now listening
int port_nbr = zsock_bind (client, "tcp://127\&.0\&.0\&.1:*");
assert (port_nbr != \-1);
s_assert_event (clientmon, "LISTENING");

//  Check server connected to client
zsock_connect (server, "tcp://127\&.0\&.0\&.1:%d", port_nbr);
s_assert_event (servermon, "CONNECTED");

//  Check client accepted connection
s_assert_event (clientmon, "ACCEPTED");
#if defined (ZMQ_EVENT_HANDSHAKE_SUCCEED)
s_assert_event (clientmon, "HANDSHAKE_SUCCEED");
#endif
#if defined (ZMQ_EVENT_HANDSHAKE_SUCCEEDED)
s_assert_event (clientmon, "HANDSHAKE_SUCCEEDED");
#endif

zactor_destroy (&clientmon);
zactor_destroy (&servermon);
zsock_destroy (&client);
zsock_destroy (&server);

#if defined (__WINDOWS__)
zsys_shutdown();
#endif
.fi
.if n \{\
.RE
.\}
.sp
.SH "AUTHORS"
.sp
The czmq manual was written by the authors in the AUTHORS file\&.
.SH "RESOURCES"
.sp
Main web site: \m[blue]\fB\%\fR\m[]
.sp
Report bugs to the email <\m[blue]\fBzeromq\-dev@lists\&.zeromq\&.org\fR\m[]\&\s-2\u[1]\d\s+2>
.SH "COPYRIGHT"
.sp
Copyright (c) the Contributors as noted in the AUTHORS file\&. This file is part of CZMQ, the high\-level C binding for 0MQ: http://czmq\&.zeromq\&.org\&. This Source Code Form is subject to the terms of the Mozilla Public License, v\&. 2\&.0\&. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla\&.org/MPL/2\&.0/\&. LICENSE included with the czmq distribution\&.
.SH "NOTES"
.IP " 1." 4
zeromq-dev@lists.zeromq.org
.RS 4
\%mailto:zeromq-dev@lists.zeromq.org
.RE