limiter-spring-boot-starter's Introduction

limiter-spring-boot-starter

limiter SpringBoot Edition

Support function：

Single-machine current limiting
Cluster Current Limitation

Tips：

Each time a node is restarted or added, the initial number fills redis, of course, when the capacity is not maximized.    
Specific flow restriction parameters, please cooperate with pressure testing tools to optimize, to achieve the QPS you need.  
If the current limit is successful, the code block with @LimitTraffic annotation will be executed, otherwise it will not be executed to facilitate user-defined schemes, such as service protection degradation, etc.  
In order to improve performance without strong consistency, the maximum current limiting error is -1 cluster number.

Quick Start

<!--Adding dependencies to pom. XML-->
        <dependency>
            <artifactId>limiter-spring-boot-starter</artifactId>
            <groupId>com.github.thierrysquirrel</groupId>
            <version>1.0.3-RELEASE</version>
        </dependency>

configuration file

## application.properties
spring.redis.host= #Your redis address
spring.redis.port= #The port number of your redis

Start limiter

@SpringBootApplication
@EnableLimiter
public class DemoApplication{
    public static void main(String[] args){
        SpringApplication.run(DemoApplication.class, args);
    }  
}

Current Limitation

@TokenLimitedTraffic
public class Hello {
	@LimitTraffic(initialQuantity = 2333, maximumCapacity = 3222, addedQuantity = 2333)
	public String hello() {
		return "world";
	}
}

Custom operation

@RestController
public class World {
	@Resource
	private Hello hello;

	@GetMapping("/world")
	public String world() {
		String hello = this.hello.hello();
		boolean empty = StringUtils.isEmpty(hello);
		if (empty) {
			return "service degradation";
		}
		return hello;
	}
}

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