Display concurrency in data on Kibana

[tbragin (Tanya Bragin)]

It worked for me with the following data and config:

curl -XPOST 'http://localhost:9200/test3' -d '{
    "settings" : {
        "number_of_shards" : 1
    },
    "mappings" : {
        "test" : {
            "properties" : {
                "start_date" : { "type" : "date"},
                "end_date" : { "type" : "date"},
                "duration" : { "type" : "integer"}
            }
        }
    }
}'

curl -XPUT 'http://localhost:9200/test3/test/1' -d '{
    "start_date" : "2015-08-23T00:01:00",
    "end_date" : "2015-08-23T14:02:00",
    "duration" : 1
}'

curl -XPUT 'http://localhost:9200/test3/test/2' -d '{
    "start_date" : "2015-08-23T00:01:30",
    "end_date" : "2015-08-23T14:02:30",
    "duration" : 1
}'

curl -XPUT 'http://localhost:9200/test3/test/3' -d '{
    "start_date" : "2015-08-23T00:01:45",
    "end_date" : "2015-08-23T14:02:45",
    "duration" : 1
}'

curl -XPUT 'http://localhost:9200/test3/test/4' -d '{
    "start_date" : "2015-08-23T00:01:55",
    "end_date" : "2015-08-23T14:02:55",
    "duration" : 1
}'

curl -XPUT 'http://localhost:9200/test3/test/5' -d '{
    "start_date" : "2015-08-23T00:02:00",
    "end_date" : "2015-08-23T14:04:00",
    "duration" : 1
}'

Script:

{
"interval":"minute",
"script": "start = doc['start_date'].value; duration = doc['duration'].value*1000*1000; l = []; for (long i = 0; i < duration; i += 60000) { l.add(start + i); }; return l;",
"field": null,
"lang": "groovy"
}