Count statement in mongodb - mongodb

Question

I have the following mysql statement but I'd like to use it with spring mongodb driver for java. How to convert it? Have looked at aggregation but have no clue how to.
SELECT SUM(CASE WHEN CreatedTime BETWEEN ('7:00:00' AND '7:14:59') THEN 1 ELSE 0) as firstCount,
SUM(CASE WHEN CreatedTime BETWEEN ('7:15:00' AND '7:29:59') THEN 1 ELSE 0) as secondCount,
FROM MyTable
Where username='Jim'
Mongo document:
{ _id: ObjectId("5asd3ea3402984ca53"), username: "Jim", comment: "hi", CreatedTime: ISODate("2014-10-15T16:39:26.870Z") }
UPDATE on translating it to java using spring data:
When calling getTemplate().executeCommand(match); I get this:
{ "serverUsed" : "xxxxxxx" , "ok" : 0.0 , "errmsg" : "no such cmd: $match" , "bad cmd" : {
"$match" : { "username" : "Jim"} ,
"$group" : {
"firstCount" : {
"$sum" : {
"$cond" : {
"if" : {
"$and" : [ [ { "$gte" : { "$CreatedTime" : { "$date" : "2014-09-20T16:02:10.924Z"}}} , 1 , 0] ,
[ { "$lte" : { "$CreatedTime" : { "$date": "2014-10-20T15:48:19.744Z"}}} , 1 , 0]]} ,
"then" : { "$ifTrue" : 1} ,
"else" : { "$else" : 0}
}
}
}
}}}
Code that I use to get the JSON is here (its quite long).Query looks about the same that was suggested by #Wizard
What could be the trouble with $match? I read somewhere in Stackoverflow that old versions of mongodb do not support $match but I have Aug-2014 release so that can't be the case.

Answer 1

Like this:
db.MyTable.aggregate([{
$match : {
username : 'Jim'
}
}, {
$group : {
_id : 0,
firstCount : {
$sum : {
$cond : {
"if" : {
$and : [{
$gte : [ "$CreateTime", '7:00:00' ]
}, {
$lte : [ "$CreateTime", '7:14:59' ]
}]
},
"then" : 1,
"else" : 0
}
}
},
secondCount : {
$sum : {
$cond : {
"if" : {
$and : [{
$gte : [ "$CreateTime", '7:15:00' ]
}, {
$lte : [ "$CreateTime", '7:29:59' ]
}]
},
"then" : 1,
"else" : 0
}
}
},
}
}]);