找不到密钥“akka.version"的配置设置 [英] No configuration setting found for key 'akka.version'
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问题描述
我正在学习 akka-remoting，这就是我的项目的样子
I am learning akka-remoting and this is how my project looks
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 上运行我的项目时，我看到
When I run my project on command-line, I see
$ 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
推荐答案
看来你的问题被捆绑到一个 jar-with-dependencies 中，这会导致 Akka 出现问题，如 文档:
It seems that your problem is bundling into a jar-with-dependencies, which causes problems with Akka, as described in the documentation:
警告
Akka 的配置方法在很大程度上依赖于每个模块/jar 都有自己的 reference.conf 文件的概念，所有这些都将被配置发现并加载.不幸的是，这也意味着如果您将多个 jars 放入/合并到同一个 jar 中，您还需要合并所有 reference.confs.否则所有默认值都将丢失，Akka 将无法运行.
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.
同页建议，可以使用maven-shade-plugin合并所有参考配置:
As suggested on the same page, you can use maven-shade-plugin to merge all the reference configurations:
如果您使用 Maven 打包您的应用程序，您还可以利用 Apache Maven Shade Plugin 对资源转换器的支持将构建类路径上的所有 reference.confs 合并为一个.
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.
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