I am getting a runtime error and the I’m sure it’s some dependency problem. Trouble is, I can’t find a suggested list of dependencies if I want to make this example run from Java using Maven. The example code is here: https://github.com/akka/akka-http/blob/v10.1.1/docs/src/test/java/docs/http/javadsl/server/WebSocketCoreExample.java
The specific error is when the code tries to bindAndHandleSync
And the error is:
Exception in thread "main" java.lang.NoClassDefFoundError: akka/util/ConstantFun$
at akka.http.impl.model.parser.HeaderParser$.Settings$default$3(HeaderParser.scala:199)
at akka.http.impl.model.parser.HeaderParser$.<init>(HeaderParser.scala:217)
at akka.http.impl.model.parser.HeaderParser$.<clinit>(HeaderParser.scala)
at akka.http.scaladsl.model.headers.ProductVersion$.parseMultiple(ProductVersion.scala:31)
at akka.http.scaladsl.model.headers.User$minusAgent$.apply(headers.scala:952)
at akka.http.impl.settings.ClientConnectionSettingsImpl$$anonfun$fromSubConfig$1.apply(ClientConnectionSettingsImpl.scala:51)
at akka.http.impl.settings.ClientConnectionSettingsImpl$$anonfun$fromSubConfig$1.apply(ClientConnectionSettingsImpl.scala:51)
at scala.Option.map(Option.scala:146)
at akka.http.impl.settings.ClientConnectionSettingsImpl$.fromSubConfig(ClientConnectionSettingsImpl.scala:51)
at akka.http.impl.settings.ConnectionPoolSettingsImpl$.fromSubConfig(ConnectionPoolSettingsImpl.scala:61)
at akka.http.impl.settings.ConnectionPoolSettingsImpl$.fromSubConfig(ConnectionPoolSettingsImpl.scala:52)
at akka.http.impl.util.SettingsCompanion.apply(SettingsCompanion.scala:51)
at akka.http.scaladsl.settings.ConnectionPoolSettings$.apply(ConnectionPoolSettings.scala:79)
at akka.http.scaladsl.settings.ConnectionPoolSettings$.apply(ConnectionPoolSettings.scala:78)
at akka.http.scaladsl.settings.SettingsCompanion$class.apply(SettingsCompanion.scala:19)
at akka.http.scaladsl.settings.ConnectionPoolSettings$.apply(ConnectionPoolSettings.scala:78)
at akka.http.scaladsl.HttpExt.<init>(Http.scala:61)
at akka.http.scaladsl.Http$.createExtension(Http.scala:956)
at akka.http.scaladsl.Http$.createExtension(Http.scala:829)
at akka.actor.ActorSystemImpl.registerExtension(ActorSystem.scala:866)
at akka.actor.ExtensionId$class.apply(Extension.scala:77)
at akka.http.scaladsl.Http$.apply(Http.scala:951)
at akka.http.scaladsl.Http$.apply(Http.scala:829)
at akka.http.javadsl.Http.delegate$lzycompute(Http.scala:45)
at akka.http.javadsl.Http.delegate(Http.scala:45)
at akka.http.javadsl.Http.defaultServerHttpContext(Http.scala:826)
at akka.http.javadsl.Http.bindAndHandleSync(Http.scala:278)
at com.xxx.yyy.core.WebSocketCoreExample.main(WebSocketCoreExample.java:66)