Hey all, Adding to Aaron's response, we use Bazel to build our Flink apps. We've open-sourced some of our setup here[1] though a bit outdated. There are definitely rough edges/ probably needs a good deal of work to fit other setups. We have written a wrapper around the `java_library` and `java_binary` and could do the same for `rules_scala`, though we just started using Bazel last November and have a lot to learn in terms of best practices there.
If you're interested in contributing to a `rules_flink` project, I would be as well! Best, Austin [1]: https://github.com/fintechstudios/vp-operator-demo-ff-virtual-2020 On Thu, Jun 11, 2020 at 6:14 PM Aaron Levin <aaronle...@stripe.com> wrote: > Hi Dan, > > We use Bazel to compile our Flink applications. We're using "rules_scala" ( > https://github.com/bazelbuild/rules_scala) to manage the dependencies and > produce jars. We haven't had any issues. However, I have found that > sometimes it's difficult to figure out exactly what Flink target or > dependency my application needs. > > Unfortunately I'm not sure what issue you're seeing here. I would guess > either your flink application wasn't compiled into the jar > you're executing. If you can paste the bazel target used to generate your > jar and how you're launching the application, that will be helpful > for diagnosis. > > On Thu, Jun 11, 2020 at 5:21 PM Dan Hill <quietgol...@gmail.com> wrote: > >> I took the Flink playground and I'm trying to swap out Maven for Bazel. >> I got to the point where I'm hitting the following error. I want to diff >> my code with an existing, working setup. >> >> Thanks! - Dan >> >> >> client_1 | >> org.apache.flink.client.program.ProgramInvocationException: >> Neither a 'Main-Class', nor a 'program-class' entry was found in the jar >> file. >> >> client_1 | at >> org.apache.flink.client.program.PackagedProgram.getEntryPointClassNameFromJar(PackagedProgram.java:596) >> >> client_1 | at >> org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:190) >> >> client_1 | at >> org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:128) >> >> client_1 | at >> org.apache.flink.client.cli.CliFrontend.buildProgram(CliFrontend.java:862) >> >> client_1 | at >> org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:204) >> >> client_1 | at >> org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:1050) >> >> client_1 | at >> org.apache.flink.client.cli.CliFrontend.lambda$main$11(CliFrontend.java:1126) >> >> client_1 | at >> org.apache.flink.runtime.security.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:30) >> >> client_1 | at >> org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:1126) >> >
