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mruby bindings for libzmq (v4)

mruby-zmq 최신버젼 다운로드

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# mruby-zmq
mruby bindings for https://github.com/zeromq/libzmq (v4)

Everything libzmq offers is mapped 1:1 to the LibZMQ namespace, no beautification was done.
High level ruby functions are inside the ZMQ Namespace, you can find most of it inside the mrblib folder, except some of the Msg and Socket classes functions which have to be done in c.

Installation
============

If you dont have libzmq installed on a non Windows platform we will build it and statically link it into your mruby app.
If you have it installed you need to have pkg-config installed.
Then add

```ruby
conf.gem mgem: 'mruby-zmq'
```
to your build_config.rb

Examples
========

Sockets
-------
Client to Server

```ruby
server = ZMQ::Server.new("tcp://127.0.0.1:*") # you can optionally add a boolean argument if it should connect instead of bind
client = ZMQ::Client.new(server.last_endpoint) # you can optionally add a boolean argument if it should bind instead of connect

client.send("hello")
msg = server.recv
puts msg['Peer-Address'] # This gets you the metadata of a message
puts msg.to_str
msg2 = ZMQ::Msg.new("hello too")
msg2.routing_id = msg.routing_id
msg2.send(server)
puts client.recv.to_str
```

Dealer to Router

```ruby
router = ZMQ::Router.new("tcp://127.0.0.1:*")
dealer = ZMQ::Dealer.new(router.last_endpoint)

dealer.send("hello")
msg = router.recv
puts msg[1].to_str
router.send([msg[0], "hello too"])
puts dealer.recv.to_str
```

Pub to Sub

```ruby
pub = ZMQ::Pub.new("tcp://127.0.0.1:*")
sub = ZMQ::Sub.new(pub.last_endpoint, "testme")
# you have to wait a short time here because of the slow joiner Problem
pub.send("testme hallo")
puts sub.recv.to_str
```

Logging
=======
You can define a environment variable called ZMQ_LOGGER_ENDPOINT to create pub sockets which connect to that endpoint.
There is also a ZMQ_LOGGER_IDENT env var which adds a ident to each msg from ZMQ.logger

```ruby
ZMQ.logger.info("hallo")
```

Swapping out a zmq context
==========================
There is now a C API where power users can swap out a zmq context with their own,
```c
// this shuts down the registered zmq context, closes all sockets and then terminates it.
// this must only be used on the thread which called mrb_open.
MRB_API void
mrb_zmq_ctx_shutdown_close_and_term(mrb_state* mrb);

// this swaps out the zmq context, it closes all sockets when its called for the first time after calling mrb_open.
// this must only be used on the thread which called mrb_open.
MRB_API void
mrb_zmq_set_context(mrb_state *mrb, void *context_);
```

This would be its declaration, to use it
```c
#include <mruby/zmq.h>
```

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
  project, You can obtain one at http://mozilla.org/MPL/2.0/.

Contribution Policy
===================

mruby-zmq follows the C4 Process: https://rfc.zeromq.org/spec:42/C4

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