Accessing patchset comments from plugin

[Igor]

Hi,

I'm writing a plugin that needs to read patchset comments. It's implemented as a button on change screen (based on a cookbook plugin example). 

Within apply method I can access various properties of the change using GerritApi handle, but for some reason I cannot find patchset comments.

I tried comments(), but it returns only inline comments. When trying info().messages I get null. So I assume I'm missing something.

Here is the code excerpt:

...

@Inject protected GerritApi gApi;

@Override

public String apply(RevisionResource rev, Input input) {

    try {

        Collection<ChangeMessageInfo> messages = gApi.changes().id(rev.getChange().getChangeId()).info().messages;

        if (messages == null) {

            return "Messages is null";

        } else {

            return String.format("Found %s messages", messages.size());

        }

    } catch (RestApiException e) {

        return "ERROR: Cannot read change comments";

    }

}

Thanks in advance,

Igor.