Resilience4j Plugin

Explanation

• Resilience4j is one of the options that supports flow control and circuit breaking.
• Resilience4j supports flow control and circuit breaking functions for gateway.

Plugin Setting

• In soul-admin --> plugin management --> resilience4j set to enable.
• If you don't want to use it, please close the plugin in soul-admin.

Plugin Usage

• Introducing the follow supports to the pom.xml file of soul project.

  <!-- soul resilience4j plugin start-->  <dependency>      <groupId>org.dromara</groupId>      <artifactId>soul-spring-boot-starter-plugin-resilience4j</artifactId>       <version>${last.version}</version>  </dependency>  <!-- soul resilience4j plugin end-->

• Selectors and rules, please refer to: selector

• Resilience4j Processing Details

  • timeoutDurationRate ：Configures wait time(ms) a thread waits for a permission,default value:5000。

  • limitRefreshPeriod ：Configures the period of a limit refresh. After each period the rate limiter sets its permissions count back to the limitForPeriod value,default value:500。

  • limitForPeriod ：Configures the number of permissions available during one limit refresh period,default value:50。

  • circuitEnable ：Configures circuitBreaker enable,0:OFF,1:ON ,default value:0。

  • timeoutDuration ：Configures request CircuitBreaker timeout(ms),default value:30000。

  • fallbackUri ：Configures the fall back uri。

  • slidingWindowSize ：Configures the size of the sliding window which is used to record the outcome of calls when the CircuitBreaker is closed,default value:100。

  • slidingWindowType ：Configures the type of the sliding window which is used to record the outcome of calls when the CircuitBreaker is closed, Sliding window can either be 0:count-based or 1:time-based.,default value:0。

  • minimumNumberOfCalls ：Configures the minimum number of calls which are required (per sliding window period) before the CircuitBreaker can calculate the error rate or slow call rate,default value:100。

  • waitIntervalFunctionInOpenState ：Configures the circuitBreaker time(ms) of duration,default value:10。

  • permittedNumberOfCallsInHalfOpenState ：Configures the number of permitted calls when the CircuitBreaker is half open,default value:10。

  • failureRateThreshold ：Configures the failure rate threshold in percentage,When the failure rate is equal or greater than the threshold the CircuitBreaker transitions to open and starts short-circuiting calls,default value:50。

  • automaticTransitionFromOpenToHalfOpenEnabled ：Configures automatically transition from open state to half open state,true:ON,false:OFF,default value:false。