Method Detect

src/java/containers/container.go:47–74

Detect finds the first container that can handle the application. If JBP_CONFIG_JAVA_MAIN specifies an explicit java_main_class, the Java Main container is selected unconditionally — before the normal priority order — so it can override higher-priority containers such as Spring Boot. Java Main is al

()

// so it can override higher-priority containers such as Spring Boot.
// Java Main is always registered last (lowest priority), so it is the last element.
func (r *Registry) Detect() (Container, string, error) {
	cfg := loadJavaMainConfig(r.context.Log)
	if cfg.JavaMainClass != "" && len(r.containers) > 0 {
		if jm, ok := r.containers[len(r.containers)-1].(*JavaMainContainer); ok {
			name, err := jm.Detect()
			if err != nil {
				return nil, "", err
			}
			if name != "" {
				return jm, name, nil
			}
		} else {
			r.context.Log.Warning("JBP_CONFIG_JAVA_MAIN java_main_class is set but JavaMain container is not available; ignoring override")
		}
	}

	for _, container := range r.containers {
		name, err := container.Detect()
		if err != nil {
			// Propagate errors (e.g., validation failures)
			return nil, "", err
		}
		if name != "" {
			return container, name, nil
		}
	}
	return nil, "", nil
}

// DetectAll returns all containers that can handle the application
func (r *Registry) DetectAll() ([]Container, []string, error) {