Custom sampler for special api

SleuthSamplerProperties.java

package com.scienjus.spring.cloud.sleuth;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;

import java.util.List;

@Data
@ConfigurationProperties("spring.sleuth.sampler")
public class SleuthSamplerProperties {

    private List<String> whitelist;
}

SpanNameWhitelistSampler.java

package com.scienjus.spring.cloud.sleuth;

import org.apache.commons.collections4.CollectionUtils;
import org.springframework.cloud.sleuth.Span;
import org.springframework.cloud.sleuth.sampler.PercentageBasedSampler;
import org.springframework.cloud.sleuth.sampler.SamplerProperties;

import java.util.List;

public class SpanNameWhitelistSampler extends PercentageBasedSampler {
 
    private final List<String> spanNameWhitelist;
 
    public SpanNameWhitelistSampler(SamplerProperties config, SleuthSamplerProperties extension) {
        super(config);
        this.spanNameWhitelist = extension.getWhitelist();
    }
 
    @Override
    public boolean isSampled(Span currentSpan) {
        String spanName = currentSpan.getName();
        if (CollectionUtils.isNotEmpty(spanNameWhitelist) && spanNameWhitelist.contains(spanName)) {
            return true;
        }
        return super.isSampled(currentSpan);
    }
}