Hystrix Configuration in Properties file

We use netflix hystrix circuit breaker our microservices. We use hystrix annotation like this:

@HystrixCommand(fallbackMethod = "getEmptyResult",
        threadPoolKey = "getProductThreadPool",
        commandProperties = {
                @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "50"),
                @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),
                @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "1000"),
                @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "10"),
                @HystrixProperty(name = "execution.isolation.strategy", value = "THREAD"),
                @HystrixProperty(name = "metrics.rollingStats.timeInMilliseconds", value = "20000"),
                @HystrixProperty(name = "metrics.rollingPercentile.timeInMilliseconds", value = "20000"),
                @HystrixProperty(name = "metrics.healthSnapshot.intervalInMilliseconds", value = "5000"),
                @HystrixProperty(name = "fallback.isolation.semaphore.maxConcurrentRequests", value = "100")
        },
        threadPoolProperties = {
                @HystrixProperty(name = "coreSize", value = "30"),
                @HystrixProperty(name = "maxQueueSize", value = "-1"),
        }
)
@Override
public ProductDto getProduct(Integer productId) {
   ... call other microservices
}

private ProductDto getEmptyResult(Integer productId, Throwable error) {
    logger.warn("logFor=CircuitBreaker productId={}, method={}, exception={}", productId,
            "getProduct", error);
    return null;
}

So I want to move this config our configuration files. I search how can I do it so I check hystrix documentation page https://github.com/Netflix/Hystrix/wiki/Configuration#command-properties

There is command properties tag we can easy to use properties file hystrix configuration.

We can do like this;

hystrix.command.{commandKey}.{propertiesName}=value
OR 
hystrix.command.default.{propertiesName}=value

If properties not found commendKey hystrix use default config.

For example

hystrix.commeand.productCommandKey.execution.isolation.thread.timeoutInMilliseconds=50
hystrix.commeand.default.circuitBreaker.requestVolumeThreshold=10

Change the annotation properties. We use threadPoolKey and commandKey properties file

@HystrixCommand(fallbackMethod = "getEmptyResult",
        threadPoolKey = "getProductThreadPool",
        commandKey = "getProductServiceCommand"
)
@Override
public ProductDto getProduct(Integer productId) {
   ... call other microservices
}

private ProductDto getEmptyResult(Integer productId, Throwable error) {
    logger.warn("logFor=CircuitBreaker productId={}, method={}, exception={}", productId,
            "getProduct", error);
    return null;
}

Add the properties file this configs

hystrix.command.getProductServiceCommand.execution.isolation.thread.timeoutInMilliseconds=50
hystrix.command.getProductServiceCommand.circuitBreaker.requestVolumeThreshold=10
hystrix.command.getProductServiceCommand.circuitBreaker.sleepWindowInMilliseconds=1000
hystrix.command.getProductServiceCommand.circuitBreaker.errorThresholdPercentage=10
hystrix.command.getProductServiceCommand.execution.isolation.strategy=THREAD
hystrix.command.getProductServiceCommand.metrics.rollingStats.timeInMilliseconds=20000
hystrix.command.getProductServiceCommand.metrics.rollingPercentile.timeInMilliseconds=20000
hystrix.command.getProductServiceCommand.metrics.healthSnapshot.intervalInMilliseconds=5000
hystrix.command.getProductServiceCommand.fallback.isolation.semaphore.maxConcurrentRequests=100
hystrix.threadpool.getProductServiceThreadPool.coreSize=30
hystrix.threadpool.getProductServiceThreadPool.maxQueueSize=-1