SpringBoot中的FailureAnalyzer使用详解

import org.springframework.boot.diagnostics.AbstractFailureAnalyzer;
import org.springframework.boot.diagnostics.FailureAnalysis;
public class RequiredPropertyFailureAnalyzer extends AbstractFailureAnalyzer<RequiredPropertyException> {
    @Override
    protected FailureAnalysis analyze(Throwable rootFailure, RequiredPropertyException cause) {
        return new FailureAnalysis(getDescription(cause), getAction(cause), cause);
    }
    private String getDescription(RequiredPropertyException ex) {
        return String.format("The required property '%s' is missing.", ex.getPropertyName());
    }
    private String getAction(RequiredPropertyException ex) {
        return String.format("Please provide the property '%s' in your application configuration.", ex.getPropertyName());
    }
}

public class RequiredPropertyException extends RuntimeException {
    private final String propertyName;
    public RequiredPropertyException(String propertyName) {
        super(String.format("Required property '%s' not found", propertyName));
        this.propertyName = propertyName;
    }
    public String getPropertyName() {
        return propertyName;
    }
}

org.springframework.boot.diagnostics.FailureAnalyzer=\
com.example.demo.RequiredPropertyFailureAnalyzer

import jakarta.annotation.PostConstruct;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
@SpringBootApplication
public class DemoApplication {
    public static void main(String[] args) {
       SpringApplication.run(DemoApplication.class, args); 
    }
    @Component
    public class RequiredPropertyChecker {
        @Value("${required.property:null}")
        private String requiredProperty;
        @PostConstruct
        public void checkRequiredProperty() {
            if (requiredProperty == null || requiredProperty.equals("null")) {
                throw new RequiredPropertyException("required.property");
            }
        }
    }
}

***************************
APPLICATION FAILED TO START
***************************
Description:
The required property 'required.property' is missing.
Action:
Please provide the property 'required.property' in your application configuration.