scala - 错误：对象服务不是 com.twitter.finagle 包的成员 - 在构建文件中定义 Bazel 依赖项，Scala finagle

Question

我试图将 finagle-http 库作为外部 maven 依赖项添加到我的新 bazel 项目中。但得到以下错误。我假设我在没有完全理解它的情况下在创建构建时做错了。努力学习。感谢您对此的任何帮助。

error: object Service is not a member of package com.twitter.finagle
error: object util is not a member of package com.twitter
error: type Request is not a member of package com.twitter.finagle.http
error: object Response is not a member of package com.twitter.finagle.http
error: Symbol 'type com.twitter.finagle.Client' is missing from the classpath. This symbol is required by 'object com.twitter.finagle.Http'.
error: not found: value Await

相同的代码正在使用 sbt。下面是代码。

import com.twitter.finagle.{Http, Service}
import com.twitter.finagle.http
import com.twitter.util.{Await, Future}

object HelloWorld extends App {
  val service = new Service[http.Request, http.Response] {
    def apply(req: http.Request): Future[http.Response] =
      Future.value(http.Response(req.version, http.Status.Ok))
  }
  val server = Http.serve(":8080", service)
  Await.ready(server)
}

工作区文件

maven_install(
    artifacts = [
        "org.apache.spark:spark-core_2.11:2.4.4",
        "org.apache.spark:spark-sql_2.11:2.4.1",
        "org.apache.spark:spark-unsafe_2.11:2.4.1",
        "org.apache.spark:spark-tags_2.11:2.4.1",
        "org.apache.spark:spark-catalyst_2.11:2.4.1",
        "com.twitter:finagle-http_2.12:21.8.0",
    ],
    repositories = [
        "https://repo.maven.apache.org/maven2/",
        "https://repo1.maven.org/maven2/",
    ]
)

构建文件

load("@io_bazel_rules_scala//scala:scala.bzl", "scala_binary")
package(default_visibility = ["//visibility:public"])

scala_binary(
    name="helloworld",
    main_class="microservices.HelloWorld",
    srcs=[
        "Main.scala",
        ],
    deps = ["spark],
)

java_library(
    name = "spark",
    exports = [
        "@maven//:com_twitter_finagle_http_2_12_21_8_0",
        ],
)

在我最初的 sbt 项目中工作的 SBT 依赖项

libraryDependencies += "com.twitter" %% "finagle-http" % "21.8.0"

标签： scalasbtbazelfinaglebazel-rules

Answer 1

发现了这个问题，与 sbt 不同，在 bazel 中我已经单独添加了相关的依赖项。我修改了工作区，如下所示。

maven_install(
artifacts = [
    "com.twitter:finagle-http_2.12:21.8.0",
    "com.twitter:util-core_2.12:21.8.0",
    "com.twitter:finagle-core_2.12:21.8.0",
    "com.twitter:finagle-base-http_2.12:21.8.0",
    "com.fasterxml.jackson.module:jackson-module-scala_2.12:2.11.2",
    "com.fasterxml.jackson.core:jackson-databind:2.11.2",

],
repositories = [
    "https://repo.maven.apache.org/maven2/",
    "https://repo1.maven.org/maven2/",
]

构建文件——

java_library(
name = "finagletrial",
exports = [
    "@maven//:com_twitter_finagle_http_2_12_21_8_0",
    "@maven//:com_twitter_util_core_2_12_21_8_0",
    "@maven//:com_twitter_finagle_core_2_12_21_8_0",
    "@maven//:com_twitter_finagle_base_http_2_12_21_8_0",
    "@maven//:com_fasterxml_jackson_module_jackson_module_scala_2_12_2_11_2",
    "@maven//:com_fasterxml_jackson_core_jackson_databind_2_11_2"
    ],