我想使用Colossus制作REST服务器。但是我在运行此处显示的问候世界示例时遇到了困难http://tumblr.github.io/colossus/docs/quickstart/。
我想使用maven，所以我创建了一个maven项目。这是我的pom.xml：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>deneme</groupId>
<artifactId>deneme</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<sourceDirectory>src</sourceDirectory>
<resources>
<resource>
<directory>src</directory>
<excludes>
<exclude>**/*.java</exclude>
</excludes>
</resource>
</resources>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>com.google.code.sbt-compiler-maven-plugin</groupId>
<artifactId>sbt-compiler-maven-plugin</artifactId>
<version>1.0.0-beta9</version>
<executions>
<execution>
<id>default-sbt-compile</id>
<goals>
<goal>compile</goal>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>com.tumblr</groupId>
<artifactId>colossus-metrics_2.10</artifactId>
<version>0.8.1</version>
</dependency>
</dependency>
</dependencies>
</project>
正如您所看到的，我包含了Colossus的依赖项。但是在下面的代码中，我在构建未找到的内容时遇到错误：object core。除了巨像之外，其他导入语句也有类似的错误。
import colossus._
import core._
import service._
import protocols.http._
import UrlParsing._
import HttpMethod._
class HelloService(context: ServerContext) extends HttpService(context) {
def handle = {
case request @ Get on Root / "hello" => {
Callback.successful(request.ok("Hello World!"))
}
}
}
class HelloInitializer(worker: WorkerRef) extends Initializer(worker) {
def onConnect = context => new HelloService(context)
}
object Main extends App {
implicit val io = IOSystem()
Server.start("hello-world", 9000){ worker => new HelloInitializer(worker) }
}
我得到的错误如下：
Compiling 1 Scala source to /bighome/saygin/workspace/deneme/target/classes...
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:2: not found: object core
[ERROR] import core._
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:3: not found: object service
[ERROR] import service._
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:4: not found: object protocols
[ERROR] import protocols.http._
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:5: not found: object UrlParsing
[ERROR] import UrlParsing._
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:6: not found: object HttpMethod
[ERROR] import HttpMethod._
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:8: not found: type HttpService
[ERROR] class HelloService(context: ServerContext) extends HttpService(context) {
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:8: not found: type ServerContext
[ERROR] class HelloService(context: ServerContext) extends HttpService(context) {
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:9: missing parameter type for expanded function
The argument types of an anonymous function must be fully known. (SLS 8.5)
Expected type was: ?
[ERROR] def handle = {
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:10: not found: value on
[ERROR] case request @ Get on Root / "hello" => {
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:10: not found: value Get
[ERROR] case request @ Get on Root / "hello" => {
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:10: not found: value /
[ERROR] case request @ Get on Root / "hello" => {
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:10: not found: value Root
[ERROR] case request @ Get on Root / "hello" => {
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:11: not found: value Callback
[ERROR] Callback.successful(request.ok("Hello World!"))
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:16: not found: type Initializer
[ERROR] class HelloInitializer(worker: WorkerRef) extends Initializer(worker) {
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:16: not found: type WorkerRef
[ERROR] class HelloInitializer(worker: WorkerRef) extends Initializer(worker) {
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:25: not found: value IOSystem
[ERROR] implicit val io = IOSystem()
[ERROR] ^
[ERROR] /bighome/saygin/workspace/deneme/src/myapp.scala:27: not found: value Server
[ERROR] Server.start("hello-world", 9000){ worker => new HelloInitializer(worker) }
[ERROR] ^
[ERROR] 17 errors found
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 45:26 min
[INFO] Finished at: 2016-09-19T13:50:18+03:00
[INFO] Final Memory: 24M/514M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.google.code.sbt-compiler-maven-plugin:sbt-compiler-maven-plugin:1.0.0-beta9:compile (default-sbt-compile) on project deneme: Scala compilation failed: CompileFailed -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
我该怎么办？
答案 0 :(得分：4)
看起来你只是添加了colossus-metrics_2.10作为依赖，但实际上它并没有依赖巨人本身，所以你实际上并没有吸引巨人。
我没有尝试重现自己，但我认为如果你为colossus_2.10添加另一个依赖项，它应该解决问题。