如何使用Restclient重试

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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.2.3</version>
        <relativePath/>
    </parent>

    <groupId>com.namastecode</groupId>
    <artifactId>restclient-retry</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>restclient-retry</name>
    <description>Demo project for RestClient with Spring Retry</description>

    <properties>
        <java.version>17</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.retry</groupId>
            <artifactId>spring-retry</artifactId>
            <version>2.0.5</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>6.1.4</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

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package com.namastecode.retry;

public class CustomException extends RuntimeException {

    public CustomException(String message) {
        super(message);
    }

    public CustomException(String message, Throwable cause) {
        super(message, cause);
    }
}

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package com.namastecode.retry;

import org.springframework.retry.annotation.Backoff;
import org.springframework.retry.annotation.EnableRetry;
import org.springframework.retry.annotation.Retryable;
import org.springframework.web.client.RestClient;

@EnableRetry
public class ExampleService {

    private final RestClient restClient;

    public ExampleService() {
        this.restClient = RestClient.create();
    }

    @Retryable(maxAttempts = 5, backoff = @Backoff(delay = 1000))
    public String performRestCall() {
        return restClient
            .get()
            .uri("https://example.com")
            .retrieve()
            .body(String.class);
    }

    @Retryable(maxAttempts = 3, retryFor = {CustomException.class}, backoff = @Backoff(delay = 500, multiplier = 2.0))
    public String performRestCallWithCustomException() {
        String response = restClient
            .get()
            .uri("https://example.com/api/data")
            .retrieve()
            .body(String.class);

        if (response == null || response.isEmpty()) {
            throw new CustomException("Response is empty");
        }

        return response;
    }
}

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package com.namastecode.retry;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class RestClientRetryApplication {

    public static void main(String[] args) {
        SpringApplication.run(RestClientRetryApplication.class, args);
    }
}