Sonar扫描时，提示异常：Intermediate Stream methods should not be left unused，如何解决？

Question

运行环境

java版本：17
sonarqube: 8.9.10
sonarscanner：4.6.0.2311

java stream代码通过Sonar扫描时，提示异常：Intermediate Stream methods should not be left unused

以下是简化的代码方法

public List<ServiceInstance> getBizApplications() {
    var services = discoveryClient.getServices();
    return services.stream()
            .filter(name -> name.startsWith("biz-service-"))
            .map(this::selectServiceInstance)
            .toList();
}

以下是sonar提供的参考示例

1. Noncompliant Code Example

   widgets.stream().filter(b -> b.getColor() == RED); // Noncompliant
   

2. Compliant Solution

   int sum = widgets.stream()
                      .filter(b -> b.getColor() == RED)
                      .mapToInt(b -> b.getWeight())
                      .sum();
   Stream<Widget> pipeline = widgets.stream()
                                 .filter(b -> b.getColor() == GREEN)
                                 .mapToInt(b -> b.getWeight());
   sum = pipeline.sum();
   

我按照sonar提示无法做出修改方案，求解答！

Answer 1

你试下你简化的这个代码还能扫描出来这个问题么