Cannot invoke method render() on null object in Grail while email sending - grails

Question

I am using mail:1.0.1 plugin for mail sending
but while sending mail its gives me an error..
Source :-
def serviceMethod(EmailModel mailObj) {
PageRenderer groovyPageRenderer;
try{
sendMail {
to "abc#gmail.com"
subject mailObj.subject;
html groovyPageRenderer.render(template:"myMailTemplate", model: [mailObj: mailObj])
}
} catch (Throwable th) {
th.printStackTrace();
}
}

Answer 1

If you want to send the gsp page as email body then you can send it like:
def mailService
def serviceMethod(EmailModel mailObj) {
...
mailService.sendMail {
to email
subject "subject"
body(view: "/_template", model: [mailObj: mailObj])
}
...
}
EDIT...................................................................................
Just inject PageRenderer groovyPageRenderer globally, like
import grails.gsp.PageRenderer
class TestService {
PageRenderer groovyPageRenderer
def getText() {
String s = groovyPageRenderer.render(template: "../first/temp", model: [name: 'user1690588'])
println "Content = ${s}"
}
}

Answer 2

I think you are calling Service Class(.groovy) method from java class.
by using object of EmailService class.
So you cant get Object of PageRenderer class.
for this
Create SpringsUtil Class in src/java and define constant object of EmailSerevice. like this
public class SpringsUtil {
public static ApplicationContext getCtx() {
return getApplicationContext();
}
public static ApplicationContext getApplicationContext() {
return (ApplicationContext) ServletContextHolder.getServletContext().getAttribute(GrailsApplicationAttributes.APPLICATION_CONTEXT);
}
#SuppressWarnings("unchecked")
public static <T> T getBean(String beanName) {
return (T) getApplicationContext().getBean(beanName);
}
public static final String EMAIL_SERVICE = "emailService";
// public static final String INVENTORY_REORDER_SERVICE = "InventoryReorderService";
}
create object of Service class and call method
EmailService emailService = SpringsUtil.getBean(SpringsUtil.EMAIL_SERVICE);