为什么 tag() 在 Retrofit OkHttpInterceptor 中出现 null？

Question

请看代码：

界面：

/**
 * This class is specific for entire cart module only
 */
interface ICartAPIService {
    @GET(URLConstants.API_VERSION_V1 + URLConstants.API_URL_ADDTOCART)
    suspend fun getCartData(@Tag test: String, @Query(URLConstants.API_URL_CUSTOMER_ID_1) value: String): Response<CartResponse>
}

从 DataSource 模块调用：

apiService.getCartData("mTag", getCustomerId())

拦截器：

override fun intercept(chain: Interceptor.Chain): Response {
    val request: Request = chain.request()
    val response = chain.proceed(request)

    LogUtils.d("Hello tag: " + request.tag(Invocation::class.java))
    LogUtils.d("Hello tag: " + request.tag())

结果：

你好标签：com.abc.service.remote.cart.ICartAPIService.getCartData() [mTag, 5448852]

你好标签：null

预期 output：

你好标签：mTag

Answer 1

像这样解决：

val invocation: Invocation? = request.tag(Invocation::class.java)
    if ((invocation?.arguments()?.size ?: 0) > 0) {
        LogUtils.d("Hello test: " + invocation?.arguments()?.get(0))
    }