scala – 没有找到密钥“akka.version”的配置设置

发布时间：2020-12-16 09:15:31 所属栏目：安全来源：网络整理

导读：我正在学习akka-remoting,这是我的项目的外观项目结构看起来像 project/pom.xmlproject/mymodule/pom.xmlproject/mymodule/src/main/resources/application.confproject/mymodule/src/main/scala/com.harit.akkaio.remote.RemoteApp.scalaproject/mymodule/

我正在学习akka-remoting,这是我的项目的外观

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

当我在命令行中运行我的项目时,我看到

$java -jar akkaio-remote/target/akka-remote-jar-with-dependencies.jar com.harit.akkaio.remote.RemoteApp
Hello:com.harit.akkaio.remote.RemoteApp
Exception in thread "main" com.typesafe.config.ConfigException$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>

的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

解决方法

看起来你的问题是捆绑到一个jar-with-dependencies中,这导致了Akka的问题,如 documentation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.

按照同一页面的建议,您可以使用maven-shade-plugin来合并所有参考配置：

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.

参见：Akka: missing akka.version

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!