pattern that tells the aggregator what to do with the keys from the source repository . the keys in the source repository are assumed to be period separated , and the pattern is in the same format , e.g. `` d.d.k.d '' . the pattern segments are matched against the source keys and a rule is applied : `` d '' means `` discard '' this key segment useful for global prefixes like system identifiers , or aggregate keys a.k.a. physical identifiers `` k '' means `` keep '' it with no change useful for logical identifiers like app names default is `` d.d '' we assume there is a global prefix of length 2 . concode_field_sep String keyPattern concode_elem_sep MetricReader source concode_elem_sep String prefix concode_field_sep void setPrefix concode_elem_sep Metric<?> findOne concode_elem_sep long count concode_elem_sep void update concode_elem_sep Iterable<Metric<?>> findAll concode_elem_sep String getSourceKey
void function ( String arg0 ) { this . keyPattern = arg0 ; }