Show Dialog and catch handlers

gistfile1.txt

    public void syncWithSonar(Project project) {
        Collection<Rule> sonarRules = this.sonarRulesByRuleKey.values();
        int oldSize = sonarRules.size();
        clearState();
        Collection<SonarSettingsBean> allSonarSettingsBeans = SonarSettingsComponent.getSonarSettingsBeans(project);
        SonarService sonarService = ServiceManager.getService(SonarService.class);
        if (null != allSonarSettingsBeans) {
            for (Rule rule : sonarService.getAllRules(allSonarSettingsBeans)) {
                this.sonarRulesByRuleKey.put(rule.getKey(), rule);
            }
            int newSize = sonarRulesByRuleKey.values().size();
            if (oldSize != newSize) {
                // show restart ide dialog
                final int ret = Messages.showOkCancelDialog("Detected new sonar rules. You have to restart IDE to reload the settings. Restart?",
                        IdeBundle.message("title.restart.needed"), Messages.getQuestionIcon());
                if (ret == 0) {
                    if (ApplicationManager.getApplication().isRestartCapable()) {
                        ApplicationManager.getApplication().restart();
                    } else {
                        ApplicationManager.getApplication().exit();
                    }
                }
            }
        }