---++ GET /api/entities/sla-alert/:entity-type
   * <a href="#Description">Description</a>
   * <a href="#Parameters">Parameters</a>
   * <a href="#Results">Results</a>
   * <a href="#Examples">Examples</a>

---++ Description
<verbatim>
Since: 0.8
</verbatim>
This command lists all the feed instances which have missed sla and are still not available. If a feed instance missed
sla but is now available, then it will not be reported in results. The purpose of this API is alerting and hence it
 doesn't return feed instances which missed SLA but are available as they don't require any action.

---++ Parameters
   * :entity-type Only valid option is feed.
   * entity-name <optional param> parameter to restrict results for a particular feed using feed's name.
   * start <mandatory param> start of the time window for nominal instances, inclusive.
   * end <mandatory param> end of the time window for nominal instances to be considered, default is treated as current time.
   * colo <optional param> name of the colo


---++ Results
Pending feed instances which missed SLA.

---++ Examples
---+++ Rest Call
<verbatim>
GET http://localhost:15000/api/entities/sla-alert/feed?colo=*&start=2012-04-03T07:00Z
</verbatim>
---+++ Result
<verbatim>
{
    "status":"SUCCEEDED",
    "message":"default/Success!\n",
    "requestId":"default/885720178@qtp-495452957-6 - f6e82e9b-d23f-466b-82df-4fb8293ce9cf\n",
    "instances":[
            {"cluster":"local","entityName":"out","entityType":"FEED","instanceTime":"2015-09-26T17:33:00+05:30","tags":"Missed SLA High"},
            {"cluster":"local","entityName":"out","entityType":"FEED","instanceTime":"2015-09-26T17:29:00+05:30","tags":"Missed SLA High"},
            {"cluster":"local","entityName":"out","entityType":"FEED","instanceTime":"2015-09-26T17:35:00+05:30","tags":"Missed SLA Low"},
            {"cluster":"local","entityName":"out","entityType":"FEED","instanceTime":"2015-09-26T17:30:00+05:30","tags":"Missed SLA High"},
            {"cluster":"local","entityName":"out","entityType":"FEED","instanceTime":"2015-09-26T17:34:00+05:30","tags":"Missed SLA High"},
            {"cluster":"local","entityName":"out","entityType":"FEED","instanceTime":"2015-09-26T17:31:00+05:30","tags":"Missed SLA High"},
            {"cluster":"local","entityName":"out","entityType":"FEED","instanceTime":"2015-09-26T17:32:00+05:30","tags":"Missed SLA High"}
    ]
}
</verbatim>

In case there are no pending instances which have missed sla the response will be like below:
<verbatim>
{
    "status":"SUCCEEDED",
    "message":"default/Success!\n",
    "requestId":"default/979808239@qtp-1243851750-3 - 8c7396c0-efe2-43e9-9aea-7ae6afea5fd6\n"
}
</verbatim>