netflix-hystrix-Simple Example

1 /**2 * Commandwithfallbackvianetwork.run Analog Remote call failed, fallbackvianetwork simulation needs to get old data from Redis over the network3  */4  Public classCommandwithfallbackvianetworkextendsHystrixcommand<string> {5     Private Final intID;6 7     protectedCommandwithfallbackvianetwork (intID) {8         //when Threadpoolkey is not set, Threadpoolkey defaults to Groupkey, and different threadpoolkey represent different thread pools. 9         //a group name for a hystrixcommand. This was used for grouping together commands such as for reporting, alerting, dashboards or team/library ownership.Ten         Super(Setter.withgroupkey (HystrixCommandGroupKey.Factory.asKey ("Remoteservicex")) One                 //a key to represent a hystrixcommand for monitoring, circuit-breakers, metrics publishing, caching and other such uses.  A. Andcommandkey (HystrixCommandKey.Factory.asKey ("Getvaluecommand")) - . Andcommandpropertiesdefaults (Hystrixcommandproperties.setter () - . Withexecutionisolationstrategy (HystrixCommandProperties.ExecutionIsolationStrategy.THREAD))) ; the          This. ID =ID; -     } -  - @Override +     protectedString Run () { -         //Remoteservicexclient.getvalue (ID); +         //analog Remote call failed A         Throw NewRuntimeException ("Force Failure for example"); at     } -  - @Override -     protectedString Getfallback () { -         return Newfallbackvianetwork (ID). Execute (); -     } in  -     Private Static classFallbackvianetworkextendsHystrixcommand<string> { to         Private Final intID; +         Private StaticMap<integer, string> memcacheclient =NewConcurrenthashmap<> ();//serves as a Redis cache and requires access to the network -  the          PublicFallbackvianetwork (intID) { *             //Groupkey is consistent with Commandwithfallbackvianetwork, $             Super(Setter.withgroupkey (HystrixCommandGroupKey.Factory.asKey ("Remoteservicex"))Panax Notoginseng. Andcommandkey (HystrixCommandKey.Factory.asKey ("Getvaluefallbackcommand")) -                     //Use a different threadpool for the fallback command the                     //So saturating the Remoteservicex pool won ' t prevent +                     //fallbacks from executing A. Andthreadpoolkey (HystrixThreadPoolKey.Factory.asKey ("Remoteservicexfallback"))); the              This. ID =ID; +         } -  $ @Override $         protectedString Run () { -             returnmemcacheclient.get (ID); -         } the  - @OverrideWuyi         protectedString Getfallback () { the             //The fallback also failed -             //So this fallback-of-a-fallback would Wu             //fail silently and return null -             return NULL; About         } $     } -}

netflix-hystrix-Simple Example