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161 lines
5.2 KiB
161 lines
5.2 KiB
5 years ago
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'\" t
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.\" Title: zproxy_v2
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.\" Author: [see the "AUTHORS" section]
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.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
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.\" Date: 09/14/2016
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.\" Manual: CZMQ Manual
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.\" Source: CZMQ 3.0.2
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.\" Language: English
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.\"
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.TH "ZPROXY_V2" "3" "09/14/2016" "CZMQ 3\&.0\&.2" "CZMQ Manual"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.\" http://bugs.debian.org/507673
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.SH "NAME"
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zproxy_v2 \- run a steerable proxy in the background (deprecated)
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.SH "SYNOPSIS"
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.sp
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.nf
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// Constructor
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// Create a new zproxy object\&. You must create the frontend and backend
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// sockets, configure them, and connect or bind them, before you pass them
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// to the constructor\&. Do NOT use the sockets again, after passing them to
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// this method\&.
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CZMQ_EXPORT zproxy_t *
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zproxy_new (zctx_t *ctx, void *frontend, void *backend);
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// Destructor
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// Destroy a zproxy object; note this first stops the proxy\&.
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CZMQ_EXPORT void
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zproxy_destroy (zproxy_t **self_p);
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// Copy all proxied messages to specified endpoint; if this is NULL, any
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// in\-progress capturing will be stopped\&. You must already have bound the
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// endpoint to a PULL socket\&.
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CZMQ_EXPORT void
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zproxy_capture (zproxy_t *self, const char *endpoint);
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// Pauses a zproxy object; a paused proxy will cease processing messages,
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// causing them to be queued up and potentially hit the high\-water mark on
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// the frontend socket, causing messages to be dropped, or writing
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// applications to block\&.
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CZMQ_EXPORT void
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zproxy_pause (zproxy_t *self);
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// Resume a zproxy object
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CZMQ_EXPORT void
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zproxy_resume (zproxy_t *self);
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// Self test of this class
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CZMQ_EXPORT void
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zproxy_v2_test (bool verbose);
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.fi
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.SH "DESCRIPTION"
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.sp
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The zproxy class provides an equivalent to the ZMQ steerable proxy, on all versions of ZeroMQ\&.
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.sp
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This class is deprecated in CZMQ v3; it works together with zctx, zsocket, and other deprecated V2 classes\&. New applications should use the V3 zproxy interface, based on zactor, together with the zsock class for sockets\&.
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.SH "EXAMPLE"
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.PP
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\fBFrom zproxy_v2_test method\fR.
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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zctx_t *ctx = zctx_new ();
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assert (ctx);
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void *frontend = zsocket_new (ctx, ZMQ_PULL);
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assert (frontend);
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int rc = zsocket_bind (frontend, "inproc://frontend");
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assert (rc == 0);
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void *backend = zsocket_new (ctx, ZMQ_PUSH);
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assert (backend);
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rc = zsocket_bind (backend, "inproc://backend");
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assert (rc == 0);
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zproxy_t *proxy = zproxy_new (ctx, frontend, backend);
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assert (proxy);
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// Connect application sockets to proxy
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void *faucet = zsocket_new (ctx, ZMQ_PUSH);
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assert (faucet);
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rc = zsocket_connect (faucet, "inproc://frontend");
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assert (rc == 0);
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void *sink = zsocket_new (ctx, ZMQ_PULL);
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assert (sink);
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rc = zsocket_connect (sink, "inproc://backend");
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assert (rc == 0);
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// Send some messages and check they arrived
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zstr_send (faucet, "Hello");
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char *string = zstr_recv (sink);
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assert (streq (string, "Hello"));
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zstr_free (&string);
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// Check pause/resume functionality
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zproxy_pause (proxy);
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zstr_send (faucet, "World");
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zproxy_resume (proxy);
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string = zstr_recv (sink);
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assert (streq (string, "World"));
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zstr_free (&string);
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// Create capture socket, must be a PULL socket
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void *capture = zsocket_new (ctx, ZMQ_PULL);
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assert (capture);
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rc = zsocket_bind (capture, "inproc://capture");
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assert (rc == 0);
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// Switch on capturing, check that it works
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zproxy_capture (proxy, "inproc://capture");
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zstr_send (faucet, "Hello");
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string = zstr_recv (sink);
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assert (streq (string, "Hello"));
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zstr_free (&string);
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string = zstr_recv (capture);
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assert (streq (string, "Hello"));
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zstr_free (&string);
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zproxy_destroy (&proxy);
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zctx_destroy (&ctx);
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.SH "AUTHORS"
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.sp
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The czmq manual was written by the authors in the AUTHORS file\&.
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.SH "RESOURCES"
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.sp
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Main web site: \m[blue]\fB\%\fR\m[]
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.sp
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Report bugs to the email <\m[blue]\fBzeromq\-dev@lists\&.zeromq\&.org\fR\m[]\&\s-2\u[1]\d\s+2>
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.SH "COPYRIGHT"
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.sp
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Copyright (c) 1991\-2012 iMatix Corporation \-\- http://www\&.imatix\&.com Copyright other 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\&.
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.SH "NOTES"
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.IP " 1." 4
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zeromq-dev@lists.zeromq.org
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.RS 4
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\%mailto:zeromq-dev@lists.zeromq.org
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.RE
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