In this lesson we are going to learn How to use Tornado for microservices in Python, so first of all what are Microservices, Microservices are an architectural pattern that structures an application as collection of small and independent services. each service runs in its own process and communicates with other services through lightweight mechanisms such as HTTP or messaging. main idea behind microservices is to break up a monolithic application into smaller and more manageable pieces that can be developed, deployed and scaled independently. this allows for greater flexibility and scalability, as well as making it easier to test and maintain individual components.
Some of the key benefits of microservices include:
- Improved scalability: each service can be scaled independently, making it easier to handle increases in load.
- Improved fault tolerance: if one service fails, it doesn’t bring down the entire application.
- Improved deployment: new versions of services can be deployed independently, making it easier to roll out updates.
- Improved development: smaller, more focused services can be developed and deployed more quickly.
- Improved technology choices: different services can be built with different technologies, allowing you to choose the best tool for the job.
However, microservices also come with some challenges such as increased complexity in communication between services, and service discovery, monitoring and debugging.
Overall, microservices architecture is suitable for large and complex applications that need to be flexible, scalable, and easy to maintain.
Tornado is Python web framework and asynchronous networking library that can be used to build microservices. this is basic example of how to use Tornado to create microservice:
- Install Tornado
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pip install tornado |
- Create new file named main.py and import the necessary modules
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import tornado.ioloop import tornado.web |
- Define a new handler class that will handle incoming requests
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class MainHandler(tornado.web.RequestHandler): def get(self): self.write("Hello, World!") |
- Define new application and add the handler to it
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def make_app(): return tornado.web.Application([ (r"/", MainHandler), ]) |
- Start the Tornado server
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if __name__ == "__main__": app = make_app() app.listen(8888) tornado.ioloop.IOLoop.current().start() |
- Run the service
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python main.py |
- Test the service with the following command
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curl http://127.0.0.1:8888/ |
This is basic example of how to use Tornado to create microservice. In this example we defined single handler class, MainHandler that handles incoming requests to the root URL. We can add more handlers and functionality as needed for our microservice.
Tornado is good choice for building microservices because it’s built on top of a nonblocking I/O loop, which means that it can handle a large number of simultaneous connections without blocking. This makes it well-suited for building services that need to handle a high volume of traffic.
You can find more detailed documentation on how to use Tornado on the official website https://www.tornadoweb.org/ and more examples on the GitHub page https://github.com/tornadoweb/tornado