Collosus Hello World Пример

Question

Я хочу использовать Colossus для создания сервера REST. Тем не менее, я испытываю трудности с использованием примера hello world, показанного здесь http://tumblr.github.io/colossus/docs/quickstart/.

Я хочу использовать maven, чтобы создать проект maven. Вот мой 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> 

Как вы можете видеть, я включил зависимость для Колосса. Однако в приведенном ниже коде я получаю сообщение об ошибке при построении выражения, не найденного: core объекта. И есть аналогичные ошибки для остальных операторов импорта, кроме колосса.

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) } 

} 

Я получаю ошибку следующим образом:

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 

Что я должен делать?

Answer 1

Похоже, вы только добавили colossus-metrics_2.10 в зависимость, однако на самом деле не имеет никакой зависимости от самого колосса, так что вы на самом деле не натягиваете колосса.

Я не пытался воспроизвести себя, но я думаю, что если вы добавите другую зависимость для colossus_2.10, это должно решить проблему.