Need help for script debugging for groovy (Set Priority in context to issue.summary)

Viktor Titko

We intend on setting The Priority Based on the summary for one of our SD's. For Example exemplarie mail subject "[...](Priority:1)[...]", which creates an issue with the summary [Ticketnumber][...](Priority:1)[...]. 
What we want to do:
1. get the issue.summery content
2. Look up the number after "Priority:"
3. Priority accordingly

Currently used code:

import com.atlassian.jira.issue.MutableIssue;

MutableIssue mutableIssue = (MutableIssue) issue;
String subject=issue.summary;            //gets the summary
int indexfind;                           //Help Index to Find "Priority:"
indexfind=subject.indexOf("Priority:");  //finds 'P' of "Priority:"
String Prio=subject.charAt(indexfind+9); // finds the number of summary

switch (Prio){ 
    case "1": mutableIssue.setPriorityId("2"); //set prio Critical 
              break; 
    case "2": mutableIssue.setPriorityId("3"); //set prio high 
              break; 
    case "3": mutableIssue.setPriorityId("4"); //set Prio Moderate 
              break; 
    case "4": mutableIssue.setPriorityId("5"); //set Prio Low 
              break; 
    default:  mutableIssue.setPriorityId("5"); //sets to default od Low 
              break; 
}

The Script runner does not throw in exception but the intended use is not given. Couldt you please help me resolve this issue?

Joshua Yamdogo @ Adaptavist

Answered on product support:

import com.atlassian.jira.issue.MutableIssue
import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.event.type.EventDispatchOption
def issue = issue as MutableIssue
String subject = issue.summary //gets the summary
int indexfind  //Help Index to Find "Priority:"
indexfind = subject.indexOf("Priority:")   //finds 'P' of "Priority:"
String Prio = subject.charAt(indexfind+9)  // finds the number of summary
switch (Prio)
{
case "1":
        issue.setPriorityId("2") //set prio Critical
        break
    case "2":
        issue.setPriorityId("3") //set prio high
        break
    case "3":
        issue.setPriorityId("4") //set Prio Moderate
        break
    case "4":
        issue.setPriorityId("5") //set Prio Low
        break
    default:
        issue.setPriorityId("5") //sets to default od Low 
        break
}
ComponentAccessor.getIssueManager().updateIssue(ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser(), issue, EventDispatchOption.DO_NOT_DISPATCH, false);