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Can someone please explain to me about Hystrix? I googled it, but still, I am not clear.
Please provide me with an example of Hystrix usage.
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Advertisements. Hystrix is a library from Netflix. Hystrix isolates the points of access between the services, stops cascading failures across them and provides the fallback options. For example, when you are calling a 3rd party application, it takes more time to send the response.
Hystrix helps by providing protection and control over latency and failure from dependencies, most commonly those accessed over network. It helps stop cascading failures and allows you to fail fast and rapidly recover, or fallback and gracefully degrade. Here's how it works.
It makes more sense for the service to back off and give calls to the callee service after some time or share default response. Netflix Hystrix, Resilince4j are two well-known circuit breakers which are used to handle such situations.
As ahus1 said, there is no single way to disable Hystrix entirely. To disable it in our application, we decided it was cleanest and safest to put a HystrixCommand in a wrapper class, and that wrapper class only exposed the parts of the HystrixCommand that we used (in our case, the execute() method).
What is hystrix?
Hystrix is a library developed by Netflix and is part of Spring via the Spring Cloud Netflix project. Hystrix is a fault tolerance library and is used as strategy against failures (at different levels) in a service-layer.
Why do we use Hystrix?
Hystrix can be used in situations where your application depends on remote services. In case one or more remote services are down you can handle the situation by using a circuit breaker in your application.
In simpler terms: How to allow one service to continue functioning – when it calls external services which are failing?
Hystrix is watching methods for failing calls to related services. If there is such a failing method, it will open the circuit, which means, it forwards the call to a fallback method. In case the services is restored it will close the circuit and the applications acts as expected again.
See this great article for more background.
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