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64 lines
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Markdown
64 lines
No EOL
2 KiB
Markdown
---
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title: "Why ZeroMQ"
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date: 2019-06-16T19:26:50-04:00
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draft: false
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tags: [ "Networking" ]
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medium_enabled: true
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---
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I've been playing around with ZeroMQ recently and it's been really exciting. This blog post is going to outline why I think you should be using ZeroMQ today.
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First of all, before you compare this to other products like RabbitMQ, DDS, etc. Realize that this is a static library that you link to in your application as opposed to a broker you run. This means that you can get the benefits with this library for very little overhead.
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## Easier Sockets
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Instead of talking about how easy ZeroMQ is to use, I'm going to just show you the code to implement a server-client relationship in Python.
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**Server.py**
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```python
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import zmq
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import time
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port = "5556"
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context = zmq.Context()
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socket = context.socket(zmq.REP)
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socket.bind("tcp://*:%s" % port)
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while True:
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msg = socket.recv()
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print(msg)
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time.sleep(1)
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socket.send_string("Server Message To Client")
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```
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**Client.py**
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```python
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import zmq
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import time
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port = "5556"
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context = zmq.Context()
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socket = context.socket(zmq.REQ)
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socket.connect("tcp://localhost:%s" % port)
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while True:
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socket.send_string("client message to server")
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time.sleep(1)
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msg = socket.recv()
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print(msg)
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```
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And just like that we have a way to transport messages back and forth. No need to make a special header before each message to know the appropriate size of the packets. ZeroMQ abstracts those details from you.
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## Different Transports Available
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You're not limited to only `TCP`. You can use `inproc` for thread-to-thread messaging, `ipc` for inter-process communication, and `epgm` or `pgm` for multicast messaging. Most of the time, just changing the connection string in `socket.connect` just works!
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## Common Networking Patterns Built In
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Sometimes we just want a dumb pipe between two ends (`pipe`) but most of the times we're writing applications that follow the `server-client` or `publisher-subscriber` architecture. That gets defined in `context.socket`.
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Ex: `context.socket(zmq.PAIR)` |