Lombok and jvm_args

[jemag]

I have been trying to make Lombok work with nvim-jdtls with no success.

Previously, I was using coc-java and would have the following setting in my coc-settings.json:

  "java.jdt.ls.vmargs": "-javaagent:/home/jemag/.config/nvim/dependencies/lombok.jar -Xbootclasspath/a:/home/jemag/.config/nvim/dependencies/lombok.jar",

This allowed me to use Lombok in my java projects.

Right now, I am unsure how to achieve the same behavior. I have attempted to put it through jvm_args in init_options in a couple of different ways (I am not the best with lua):

function start_jdt()
    print("starting jdt")
    require('jdtls').start_or_attach({
    cmd = {'java-lsp.sh'},
    init_options = {
      bundles = {"/home/jemag/dev/java-debug/com.microsoft.java.debug.plugin/target/com.microsoft.java.debug.plugin-*.jar"},
      --jvm_args = {"-javaagent:/home/jemag/.config/nvim/dependencies/lombok.jar", "-Xbootclasspath/a:/home/jemag/.config/nvim/dependencies/lombok.jar"}
      --jvm_args = {"-javaagent:/home/jemag/.config/nvim/dependencies/lombok.jar -Xbootclasspath/a:/home/jemag/.config/nvim/dependencies/lombok.jar"}
      --jvm_args = {["javaagent"]="/home/jemag/.config/nvim/dependencies/lombok.jar", ["Xbootclasspath/a"]="/home/jemag/.config/nvim/dependencies/lombok.jar"}
      --jvm_args = {["java.jdt.ls.vmargs"]="-javaagent:/home/jemag/.config/nvim/dependencies/lombok.jar -Xbootclasspath/a:/home/jemag/.config/nvim/dependencies/lombok.jar"}
    },
    on_attach = function(client)
    on_attach_common(client)
    on_attach_java(client)
    end
    })

end;

local autocmds = {
	lsp = {
		{"FileType",     "java",   "lua start_jdt()"};
	};
}

But none of the commented jvm_args would work. I then tried to modify my java-lsp.sh by adding it there:

 #!/bin/bash
 # -Xbootclasspath/a "/home/jemag/.config/nvim/dependencies/lombok.jar" \

JAR="$HOME/dev/eclipse/eclipse.jdt.ls/org.eclipse.jdt.ls.product/target/repository/plugins/org.eclipse.equinox.launcher_*.jar"
export GRADLE_HOME=/usr/bin/gradle
java \
  -Declipse.application=org.eclipse.jdt.ls.core.id1 \
  -Dosgi.bundles.defaultStartLevel=4 \
  -Declipse.product=org.eclipse.jdt.ls.core.product \
  -Dlog.protocol=true \
  -Dlog.level=ALL \
  -Xms1g \
  -Xmx2G \
  -jar $(echo "$JAR") \
  -configuration "$HOME/dev/eclipse/eclipse.jdt.ls/org.eclipse.jdt.ls.product/target/repository/config_linux" \
  -javaagent:/home/jemag/.config/nvim/dependencies/lombok.jar \
  -data "$HOME/dev/eclipse/workspace" \
  --add-modules=ALL-SYSTEM \
  --add-opens java.base/java.util=ALL-UNNAMED \
  --add-opens java.base/java.lang=ALL-UNNAMED

This also did not seem to work. Both methods resulted in me still getting Lombok errors in my projects.

I was wondering if you had any ideas how this could be achieved properly with nvim-jdtls?

[mfussenegger]

coc-java uses the java.jdt.ls.vmargs option to adjust the command that is used to start the language server. So your variant that adjusts the java-lsp.sh script should be correct.

You could try using coc-java again, then use ps aux | grep java to find the exact command coc-java uses to start the language server and then adapt the java-lsp.sh based on that.

eclipse.jdt.ls itself doesn't support the vmargs or jvm_args option. So setting any of those within init_options won't have any affect.

[jemag]

Thanks for the tips.

So apparently -javaagent must always come before the -jar flag, once I did that change in my java-lsp.sh file, it started working properly. So basically:

 #!/bin/bash

JAR="$HOME/dev/eclipse/eclipse.jdt.ls/org.eclipse.jdt.ls.product/target/repository/plugins/org.eclipse.equinox.launcher_*.jar"
export GRADLE_HOME=/usr/bin/gradle
java \
  -Declipse.application=org.eclipse.jdt.ls.core.id1 \
  -Dosgi.bundles.defaultStartLevel=4 \
  -Declipse.product=org.eclipse.jdt.ls.core.product \
  -Dlog.protocol=true \
  -Dlog.level=ALL \
  -Xms1g \
  -Xmx2G \
  -javaagent:/home/jemag/.config/nvim/dependencies/lombok.jar \
  -Xbootclasspath/a:/home/jemag/.config/nvim/dependencies/lombok.jar \
  -jar $(echo "$JAR") \
  -configuration "$HOME/dev/eclipse/eclipse.jdt.ls/org.eclipse.jdt.ls.product/target/repository/config_linux" \
  -data "$HOME/dev/eclipse/workspace" \
  --add-modules=ALL-SYSTEM \
  --add-opens java.base/java.util=ALL-UNNAMED \
  --add-opens java.base/java.lang=ALL-UNNAMED

[guysherman]

Just adding some extra info on top of @jemag's post...
I was getting class def not found issues when the LSP was trying to load. (It couldn't find javax.annotation.processing.AbstractProcessor) I found it was the -Xbootclasspath argument, apparently you shouldn't need it for recent versions of java, according to the lombok docs on using Lombok with ECJ/JDT (I'm guessing Java 11 on). Removing it resolved my issue.

[davidsoles]

Just adding some extra info on top of @jemag's post... I was getting class def not found issues when the LSP was trying to load. (It couldn't find javax.annotation.processing.AbstractProcessor) I found it was the -Xbootclasspath argument, apparently you shouldn't need it for recent versions of java, according to the lombok docs on using Lombok with ECJ/JDT (I'm guessing Java 11 on). Removing it resolved my issue.

Thank you very much my friend. You solved my problem 🥇