[英]Scalatra could not find or load main class
I have hello world scalatra application.我有 hello world scalatra 应用程序。 I added scalatra-sbt plugin and:
我添加了 scalatra-sbt 插件和:
val myDistSettings = DistPlugin.distSettings ++ Seq(
mainClass in Dist := Some("WebServerLauncher"),
memSetting in Dist := "2g",
permGenSetting in Dist := "256m",
envExports in Dist := Seq("LC_CTYPE=en_US.UTF-8", "LC_ALL=en_US.utf-8"),
javaOptions in Dist ++= Seq("-Xss4m",
"-Dfile.encoding=UTF-8",
"-Dlogback.configurationFile=logback.prod.xml",
"-Dorg.scalatra.environment=production")
)
After making sbt dist
it generates .zip with:制作
sbt dist
它会生成 .zip 文件:
#!/bin/env bash
export CLASSPATH="lib:lib/logback-core-1.0.6.jar:lib/jetty-webapp-8.1.8.v20121106.jar:lib/jetty-io-8.1.8.v20121106.jar:lib/scalatra-scalate_2.10-2.2.2.jar:lib/jetty-server-8.1.8.v20121106.jar:lib/mime-util-2.1.3.jar:lib/scalatra-common_2.10-2.2.2.jar:lib/scalate-core_2.10-1.6.1.jar:lib/jetty-util-8.1.8.v20121106.jar:lib/jetty-servlet-8.1.8.v20121106.jar:lib/joda-convert-1.2.jar:lib/juniversalchardet-1.0.3.jar:lib/slf4j-api-1.7.5.jar:lib/scala-library-2.10.4.jar:lib/jetty-continuation-8.1.8.v20121106.jar:lib/grizzled-slf4j_2.10-1.0.1.jar:lib/config-1.0.0.jar:lib/javax.servlet-3.0.0.v201112011016.jar:lib/jetty-xml-8.1.8.v20121106.jar:lib/rl_2.10-0.4.4.jar:lib/jetty-security-8.1.8.v20121106.jar:lib/akka-actor_2.10-2.1.2.jar:lib/jetty-http-8.1.8.v20121106.jar:lib/scala-reflect-2.10.0.jar:lib/scalate-util_2.10-1.6.1.jar:lib/logback-classic-1.0.6.jar:lib/scalatra_2.10-2.2.2.jar:lib/joda-time-2.2.jar:lib/scala-compiler-2.10.0.jar:"
export JAVA_OPTS="-Xms2g -Xmx2g -XX:PermSize=256m -XX:MaxPermSize=256m -Xss4m -Dfile.encoding=UTF-8 -Dlogback.configurationFile=logback.prod.xml -Dorg.scalatra.environment=production"
export LC_CTYPE=en_US.UTF-8
export LC_ALL=en_US.utf-8
java $JAVA_OPTS -cp $CLASSPATH WebServerLauncher
When i'm trying to run it i got:当我尝试运行它时,我得到了:
Error: Could not find or load main class WebServerLauncher
There is WebServerLauncher.class
in lib directory. lib 目录中有
WebServerLauncher.class
。
How to correctly launch it?如何正确启动它?
Thank you.谢谢你。
I was having the exact same problem today.我今天遇到了完全相同的问题。
What I found is that the generated script is path-dependent.我发现生成的脚本是路径相关的。 That is, you do NOT execute it from within the bin directory, but one directory higher, in dist.
也就是说,您不是在 bin 目录中执行它,而是在更高的目录 dist 中执行它。
You then execute bin/YOURSCRIPTNAME and it should work.然后您执行 bin/YOURSCRIPTNAME ,它应该可以工作。
I figured this out when I noticed that the path for the CLASSLIB weas lib/WHATEVER (relative path).当我注意到 CLASSLIB 的路径是 lib/WHATEVER(相对路径)时,我发现了这一点。 The only place this path would be correct would be from the dist directory.
这个路径唯一正确的地方是来自 dist 目录。
Hope this helps.希望这可以帮助。
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