scala - 未找到 key 'akka.version' 的配置设置

标签 scala maven akka typesafe-stack typesafe-config

我正在学习 akka-remoting，这就是我的项目的样子

项目结构看起来像

project/pom.xml
project/mymodule/pom.xml
project/mymodule/src/main/resources/application.conf
project/mymodule/src/main/scala/com.harit.akkaio.remote.RemoteApp.scala
project/mymodule/src/main/scala/com.harit.akkaio.remote.ProcessingActor.scala

当我在 command-line 上运行我的项目时， 我懂了
$ java -jar akkaio-remote/target/akka-remote-jar-with-dependencies.jar com.harit.akkaio.remote.RemoteApp
Hello:com.harit.akkaio.remote.RemoteApp
Exception in thread "main" com.typesafe.config.ConfigException$Missing: No configuration setting found for key 'akka.version'
    at com.typesafe.config.impl.SimpleConfig.findKey(SimpleConfig.java:124)
    at com.typesafe.config.impl.SimpleConfig.find(SimpleConfig.java:145)
    at com.typesafe.config.impl.SimpleConfig.find(SimpleConfig.java:151)
    at com.typesafe.config.impl.SimpleConfig.find(SimpleConfig.java:159)
    at com.typesafe.config.impl.SimpleConfig.find(SimpleConfig.java:164)
    at com.typesafe.config.impl.SimpleConfig.getString(SimpleConfig.java:206)
    at akka.actor.ActorSystem$Settings.<init>(ActorSystem.scala:169)
    at akka.actor.ActorSystemImpl.<init>(ActorSystem.scala:505)
    at akka.actor.ActorSystem$.apply(ActorSystem.scala:142)
    at akka.actor.ActorSystem$.apply(ActorSystem.scala:119)
    at com.harit.akkaio.remote.RemoteApp$.startProcessingActorSystem(RemoteApp.scala:16)
    at com.harit.akkaio.remote.RemoteApp$.main(RemoteApp.scala:12)
    at com.harit.akkaio.remote.RemoteApp.main(RemoteApp.scala)

RemoteApp.scala 
package com.harit.akkaio.remote

import akka.actor.{ActorRef, ActorSystem, Props}
import com.typesafe.config.ConfigFactory

import scala.concurrent.duration._

object RemoteApp {
  def main(args: Array[String]): Unit = {
    println("Hello:" + args.head)
      startProcessingActorSystem()
  }

  def startProcessingActorSystem() = {
    val system = ActorSystem("ProcessingSystem", ConfigFactory.load())
    println("ProcessingActorSystem Started")
  }
}

ProcessingActor.scala 
package com.harit.akkaio.remote

import akka.actor.{Actor, ActorLogging}

case object Process

case object Crash

class ProcessingActor extends Actor with ActorLogging {
  def receive = {
    case Process => log.info("processing big things")
    case Crash => log.info("crashing the system")
      context.stop(self)
  }
}

application.conf 
akka {
  remote.netty.tcp.port = 2552
}

mymodule.pom.xml 
<?xml version="1.0" encoding="UTF-8"?>
<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">
    <parent>
        <artifactId>akkaio</artifactId>
        <groupId>com.harit</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>akkaio-remote</artifactId>

    <properties>
        <akka-remote_2.11.version>2.3.11</akka-remote_2.11.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-remote_2.11</artifactId>
            <version>${akka-remote_2.11.version}</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <artifactId>maven-assembly-plugin</artifactId>
                <configuration>
                    <finalName>akka-remote</finalName>
                    <archive>
                        <manifest>
                            <mainClass>com.harit.akkaio.remote.RemoteApp</mainClass>
                        </manifest>
                    </archive>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id> <!-- this is used for inheritance merges -->
                        <phase>package</phase> <!-- bind to the packaging phase -->
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

pom.xml 
<?xml version="1.0" encoding="UTF-8"?>
<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>com.harit</groupId>
    <artifactId>akkaio</artifactId>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>akkaio-remote</module>
    </modules>

    <packaging>pom</packaging>
    <inceptionYear>2015</inceptionYear>
    <properties>
        <scala.version>2.11.6</scala.version>
        <junit.version>4.12</junit.version>
        <scalatest_2.11.version>2.2.5</scalatest_2.11.version>
        <akka-actor_2.11.version>2.3.11</akka-actor_2.11.version>
        <akka-slf4j_2.11.version>2.3.11</akka-slf4j_2.11.version>
        <akka-testkit_2.11.version>2.3.11</akka-testkit_2.11.version>
        <mockito-all.version>1.10.19</mockito-all.version>
        <maven-scala-plugin.scalaCompatVersion>2.11.6</maven-scala-plugin.scalaCompatVersion>
        <scalatest-maven-plugin.version>1.0</scalatest-maven-plugin.version>
    </properties>

    <repositories>
        <repository>
            <id>scala-tools.org</id>
            <name>Scala-Tools Maven2 Repository</name>
            <url>http://scala-tools.org/repo-releases</url>
        </repository>
    </repositories>

    <pluginRepositories>
        <pluginRepository>
            <id>scala-tools.org</id>
            <name>Scala-Tools Maven2 Repository</name>
            <url>http://scala-tools.org/repo-releases</url>
        </pluginRepository>
    </pluginRepositories>

    <dependencies>
        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-library</artifactId>
            <version>${scala.version}</version>
        </dependency>
        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-actor_2.11</artifactId>
            <version>${akka-actor_2.11.version}</version>
        </dependency>
        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-slf4j_2.11</artifactId>
            <version>${akka-slf4j_2.11.version}</version>
        </dependency>
        <dependency>
            <groupId>org.scalatest</groupId>
            <artifactId>scalatest-maven-plugin</artifactId>
            <version>${scalatest-maven-plugin.version}</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-testkit_2.11</artifactId>
            <version>${akka-testkit_2.11.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.scalatest</groupId>
            <artifactId>scalatest_2.11</artifactId>
            <version>${scalatest_2.11.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <defaultGoal>clean install</defaultGoal>
        <plugins>
            <plugin>
                <groupId>org.scala-tools</groupId>
                <artifactId>maven-scala-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                            <goal>testCompile</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <scalaCompatVersion>${maven-scala-plugin.scalaCompatVersion}</scalaCompatVersion>
                    <scalaVersion>${scala.version}</scalaVersion>
                    <scalaVersion>${scala.version}</scalaVersion>
                    <args>
                        <arg>-target:jvm-1.8</arg>
                    </args>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.7</version>
                <configuration>
                    <skipTests>true</skipTests>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.scalatest</groupId>
                <artifactId>scalatest-maven-plugin</artifactId>
                <version>1.0</version>
                <configuration>
                    <reportsDirectory>${project.build.directory}/surefire-reports</reportsDirectory>
                    <junitxml>.</junitxml>
                    <filereports>WDF TestSuite.txt</filereports>
                </configuration>
                <executions>
                    <execution>
                        <id>test</id>
                        <goals>
                            <goal>test</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
    <reporting>
        <plugins>
            <plugin>
                <groupId>org.scala-tools</groupId>
                <artifactId>maven-scala-plugin</artifactId>
                <configuration>
                    <scalaVersion>${scala.version}</scalaVersion>
                </configuration>
            </plugin>
        </plugins>
    </reporting>
</project>

我错过了什么？
谢谢

最佳答案

看来你的问题是捆绑成一个 jar-with-dependencies ，这会导致 Akka 出现问题，如 documentation 中所述:

Warning

Akka's configuration approach relies heavily on the notion of every module/jar having its own reference.conf file, all of these will be discovered by the configuration and loaded. Unfortunately this also means that if you put/merge multiple jars into the same jar, you need to merge all the reference.confs as well. Otherwise all defaults will be lost and Akka will not function.



正如同一页面所建议的，您可以使用 maven-shade-plugin合并所有引用配置:

If you are using Maven to package your application, you can also make use of the Apache Maven Shade Plugin support for Resource Transformers to merge all the reference.confs on the build classpath into one.



另见:Akka: missing akka.version

关于scala - 未找到 key 'akka.version' 的配置设置，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41455627/

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