Problem getting last call duration

[rahul_tiwari]

Hi guys I am trying to write a script which makes a call on click of any button or any other event and as soon as call finish reports the duration of that call to a server.

I am facing the problem in stopping the listener to the call logs. the alert for last call duration comes in recursive manner.

following is the code I am trying for listening the logs

var so = null;
var noItemsErrorCode = 1012; 

function init() {
    StartListiningLogs(); 
}
function StartListiningLogs() {

    try {
        so = device.getServiceObject("Service.Logging", "IDataSource");
    } catch (err) {
        alert("error receiving Logging service handle");
        return;
    }


    var filter = new Object();
    filter.DelayTime = 2000000;

    var criteria = new Object();
    criteria.Type = 'Log';
    criteria.Filter = filter;


    try {
        so.IDataSource.RequestNotification(criteria, ListnerCallback);
    } catch (err) {
        alert("error listining log");
    }
 
}

function ListnerCallback(transId, eventCode, result) {

     var criteria = new Object();
    criteria.Type = "Log";
    criteria.Filter = new Object();
    criteria.Filter.RecentList = 2;//outgoing calls
   


    try {
          so.IDataSource.GetList(criteria, GetRecordCallback);
    } catch (err) {
        alert("error receiving log items");
    }
    
}


function GetRecordCallback(transId, eventCode, result) {
    if (result.ErrorCode != 0) {
        // if error code is not "no suitable items" -- 
        // show alert otherwise leave the function
        if (result.ErrorCode != noItemsErrorCode) {
            alert(result.ErrorMessage);
        }
        return;
    } else {
   
        var item; // pointer to item in received list
        var temp = " ";
        for (var i = 0; (item = result.ReturnValue.getNext()) != undefined; i++) {

            if (i == 0) {
                if (item['PhoneNumber'] != undefined) {
                    temp += item['PhoneNumber'];
                }
                temp += " ";
                if (item['EventDuration'] != undefined) {
                    temp += item['EventDuration'];
                }
            }
        }
        alert(temp);
        try {
            var criteria = new Object();
            criteria.TransactionID = result.TransactionID;
            var result2 = so.IDataSource.Cancel(criteria);
        } catch (e) {
            alert("cancelRequestNotification: " + e);
        }
    } 
}

here in above code I am getting the value of result.TransactionID as undefined in function GetRecordCallback.
I wrote this code 2 months back at that time it worked fine for me. and now I am not able to figure out where
is the problem.

Thanks

[RB_Sahu]

wiki for last call duration
http://wiki.forum.nokia.com/index.php/Logs_Timers_API

[rahul_tiwari]

wiki for last call duration
http://wiki.forum.nokia.com/index.php/Logs_Timers_API

You have provided the Symbian URL.
My code is for Nokia WRT(javascript).

[isalento]

Why do you want to cancel asynchronous function in it's own callback?

If you wish to stop receiving notifications try to cancel RequestNotification instead.

 var transaction =so.IDataSource.RequestNotification(criteria, ListnerCallback);

-Ilkka

[rahul_tiwari]

Why do you want to cancel asynchronous function in it's own callback?

If you wish to stop receiving notifications try to cancel RequestNotification instead.

 var transaction =so.IDataSource.RequestNotification(criteria, ListnerCallback);

-Ilkka

Thanks for response.

yes I want to stop receiving notifications. I thought it will stop notifying if I will cancel the function.
how exactly I can cancel RequestNotification in my case(after first notification).

somehow I got it working by assigning the RequestNotification call to a global variable and canceling the transactionID from that variable. I want some more sophisticated way for doing this.

and I also want to know is there any way to receive notification related to specific event (in my case outgoing call).

[isalento]

It seems that request notification does not support filtering by event type.

You will have to cancel RequestNotification if you don't wish to have more that one notification (see the code below). However if you want it to fire only once, why not to call just GetList(phoneCallLogCriteria, GetRecordCallback)?

It is good to note, that when using request notification, it will fire once when call is made and second time when call is completed. The phone call log item is already created at the first pass and it will have all other data expect duration. In the second time, the very same log item is updated to have correct duration. Another thing to note is, that when calling to same number multiple times, the log will only hold the latest call information.

var logNotificationCriteria = {
    Type : "Log",
    Filter : {DelayTime: 2000000 }    
}

var logNotificationTransaction = null;

logNotificationTransaction = so.IDataSource.RequestNotification(logNotificationCriteria, ListnerCallback);		

function CancelNotifications(){
	
	if(logNotificationTransaction){
		var res = so.IDataSource.Cancel(logNotificationTransaction);
		
		if(res.ErrorCode !=0){
			alert("Error in canceling transaction " +logNotificationTransaction.TransactionID + " "+ res.ErrorMessage);
		}else{
			logNotificationTransaction = null;
		}
	}		
}

-Ilkka

[rahul_tiwari]

This is a great help.
I had observed the behavior u described.

so where I have to call CancelNotifications ?
in callback after processing the first received log?