Message not getting displayed on page

Question

Hello,
I have extended a controller and after some validation, i need to display message on top of Page. Please let me know.
I am not able to display the Message on top of the page; I am able to find the error entry in the log as below
[23]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:Days ====>null
[23]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:Hours ====>18
[25]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:Entering processFormRequest
[41]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:PersonId 13552
[41]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:DurationHours 18
[41]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:NetAccrual 6
[41]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:Sql select accrual from pto_bces
[41]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:Value true
[41]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:Value1 18
[41]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:Value2 6
[41]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:ProjectedEndDate 2008-09-10
[41]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:Leaving processFormRequest
[41]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:Nextnull
[42]:EXCEPTION:[kbv.oracle.apps.per.selfservice.loa.webui.MvnCreateAbsenceMainCO]:Hours.null
[43]:ERROR:[fnd.common.Message.auto_log]:PERMVN_ABS_HOURS_MESSAGENOBJECT_CODE2008-09-10
Code snippet
/*try
if (s!=null)
if (i < Integer.parseInt(s))
MessageToken[] tokens = { new MessageToken("OBJECT_CODE",l)};
OAException message = new OAException("PER", "MVN_ABS_HOURS_MESSAGE", tokens,OAException.INFORMATION, null);
// OAException message = new OAException("AK", "FWK_TBX_INVALID_EMP_NUMBER", tokens,OAException.INFORMATION, null);
pageContext.putDialogMessage(message);
// throw new OAException("PER","MVN_ABS_HOURS_MESSAGE",tokens);
// OAException message = new OAException("AK", "FWK_TBX_INVALID_EMP_NUMBER", tokens,OAException.INFORMATION, null);
// pageContext.putDialogMessage(message);
}

Answer 1

It displays on the log not on the page
[174]:ERROR:[fnd.common.Message.auto_log]:PERMVN_ABS_HOURS_MESSAGENOBJECT_CODE2008-09-10
[174]:ERROR:[fnd.framework.OAException]:Your request cannot be processed since you do not have enough accrued time as of the date you are requesting.
Code
if (s!=null)
if (i < Integer.parseInt(s))
MessageToken[] tokens = { new MessageToken("OBJECT_CODE",l)};
OAException message = new OAException("PER", "MVN_ABS_HOURS_MESSAGE", tokens,OAException.INFORMATION, null);
// OAException message = new OAException("AK", "FWK_TBX_INVALID_EMP_NUMBER", tokens,OAException.INFORMATION, null);
// pageContext.putDialogMessage(message);
throw new OAException("PER","MVN_ABS_HOURS_MESSAGE",tokens);
// throw message;
// OAException message = new OAException("AK", "FWK_TBX_INVALID_EMP_NUMBER", tokens,OAException.INFORMATION, null);
// pageContext.putDialogMessage(message);
}