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# Structured stats collection
The structured stats collection is a threadsafe key-value store, with `std::string` for keys and `int` for values.
It can be also be queried from a different process using the StatsClient class.
## Internal API
### Get stats
`std::unordered_map<std::string, int> getStats()`
Returns an unordered map copy of the current stats.
### Increment a key-value pair in stats
`int setStats(const std::string& key, int val)`
This increments the value of the corresponding key by val.
Returns 0 upon success, and 1 on error.
### Set a key-value pair in stats
`int setStats(const std::string& key, int val)`
Sets the corresponding key in stats to val.
Returns 0 upon success, and 1 on error.
### Reset stats
`int Oomd::resetStats()`
Sets the value of all existing key-value pairs in the stats collection
to 0.
Returns 0 upon success, and 1 on error.
## External interface
Command line flags:
##### `-d`
Dumps all accumulated stats to stdout in a JSON string.
$ /path/to/binary -d
{
"oomd.kills_structured" : 1,
"oomd.restarts_structured" : 2
}
$ /path/to/binary -d | jq '.["oomd.kills_structured"]'
1
#####`-r`
Reset stats by setting all values to 0.
Notes: If both `-d` and `-r` are included, `-d` is completed first.
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