<dependency>
<groupId>org.eclipse.jetty.websocket</groupId>
<artifactId>websocket-api</artifactId>
<version>9.3.19.v20170502</version>
</dependency>
libraryDependencies += "org.eclipse.jetty.websocket" % "websocket-api" % "9.3.19.v20170502"
@Grapes(
@Grab(group='org.eclipse.jetty.websocket', module='websocket-api', version='9.3.19.v20170502')
)
<dependency org="org.eclipse.jetty.websocket" name="websocket-api" rev="9.3.19.v20170502" />