GWT Plugin for Maven with Polymer (jsinterop)

[N Troncoso]

Switching to the Maven Plugin for GWT, I'm unable to get GWT to recognize the jsinterop flag. I'm assuming not many people using this plugin are using jsinterop, because I can only find a single source about it: https://github.com/tbroyer/gwt-maven-plugin/issues/22

In which there is no answer. I've tried putting:

<compilerArgs>

    <compilerArg>-XjsInteropMode</compilerArg>

    <compilerArg>JS</compilerArg>

</compilerArgs>

<codeserverArgs>

    <arg>-XjsInteropMode</arg>

    <arg>JS</arg>

</codeserverArgs>

in the parent pom under the gwt-maven-plugin configuration, as well as in the client, as well as both. Since I'm using GWT 2.8, I've also tried the -generateJsInteropExports flag. When I try to run the application, I get:

In the codeserver logs, I see:

 Arguments: com.google.gwt.dev.codeserver.CodeServer -logLevel DEBUG -workDir <snip>\target\gwt\codeserver -sourceLevel 1.8 -failOnError -launcherDir <snip>\target\gwt\launcherDir -XjsInteropMode JS -allowMissingSrc -src <snip>\client\src\main\java -src <snip>\shared\src\main\java com.ecrsoft.supportnet.Main

 The experimental -XjsInteropMode option is deprecated and will be removed very soon. See https://goo.gl/uMdOQS for migration instructions.

Which tells me the flag is being recognized.

I see lines like this that make me think it's getting compiled:

[INFO]             Resolving annotation for jsinterop.annotations.JsMethod

[INFO]          Resolving method $isInstance

[INFO]             Resolving annotation for jsinterop.annotations.JsMethod

But it still gives me that error. I've been looking at this for several days. Turning on jsinterop with mojo's plugin works fine, so I have to determine that the issue is with this plugin. That issue I link above was closed back in April. Has no one at all seriously tried using this plugin with polymer since then? I'm only using jsinterop for Polymer, so I don't have any existing annotations or anything. I'm very open to suggestions. Thanks.

[Thomas Broyer]

jsinterop.annotations.* require -XjsInteropMode JS_RC, which BTW is now the default in 2.8.0-SNAPSHOT (i;e. you don't even need to pass -XjsInteropMode). The legacy "-XjsInteropMode JS" (which should be gone in 2.8.0) uses com.google.gwt.core.js.* annotations.

I don't know GWT-Polymer much (not even sure which project you're talking about; gwt-polymer-elements from Vaadin?), but it's possible that they moved to the new annotations but forgot to update their error message. Or it might be a totally unrelated issue (like forgetting to load polymer.js)

[N Troncoso]

Thanks for that. Nothing you said was the issue, but it prompted me to double check my GWT version. It turns out I was using 2.8 beta instead of SNAPSHOT. I guess your plugin doesn't work with beta? Before switching, I was using beta for my gwt version and snapshot for my mojo plugin version and everything was good. Granted, maybe the -XjsInteropMode flag was removed in beta, which would explain the issue. I didn't think it'd be removed until release.