Can't correct assign user as Assignee in plugin

[ArtUrlWWW]

Hello.
Can you help me with the simple plugin development?
My plugin's code is here http://pastebin.com/uQtV1T79 - please look at my code.
When event fired, my plugin must set "sogl" user as assignee.
Output of the Tomcat's console is:
first event ("Issue created"):
++++++++++++++++++++++++++++++
1
---++++++++++++++++++++++++++++++
then, my event fired:
++++++++++++++++++++++++++++++
10003
List of users
sogl
END of List of users
++++++++++++++++++++++++++++++
3
---++++++++++++++++++++++++++++++
Issue updated
---++++++++++++++++++++++++++++++

But after this assignee isn't changed: in the issue's field "Assignee: admin" - the old assignee, but in "History" is the

testUser made changes - 9 minutes ago
Field Original Value New Value
Status Open [ 1 ] Согласование 0 [ 10003 ]
testUser made changes - 9 minutes ago
Assignee admin [ admin ] sogl [ sogl ]

Screenshot is attached.

My be after

IssueService issueService = ComponentAccessor.getIssueService();
AssignValidationResult avr = issueService.validateAssign(UserUtils.getUser("testUser"), issue.getId(), uName);
if (avr.isValid()) {
IssueResult updateResult = issueService.assign(UserUtils.getUser("testUser"), avr);

*********

I must re-index issue? How to fix this problem?

P.S.

When fired my event, I have receive e-mail:
testUser assigned TEES-27 to sogl
dsfdsfsdf

Change By: testUser (16/июл/13 4:21 PM)

Assignee: admin sogl

[Alexander Urzhumtsev · Accepted solution]

You have to do cast issue from issueEvent. IssueService have other instance issue. For example, this example works in 5.x and I suppose in 6.x too:

Issue issue = issueEvent.getIssue();
if (issue instanceof MutableIssue) {
   MutableIssue mutableIssue =(MutableIssue)issueEvent.getIssue();
   mutableIssue.setAssignee(yourUser);
   ComponentAccessor.getIssueManager().updateIssue(userWhoDoUpdate, mutableIssue, EventDispatchOption.DO_NOT_DISPATCH, false);
}

[ArtUrlWWW]

Hi. Latest version.

[Alexander Urzhumtsev]

What JIRA version do you have?