Attributes
- Companion:
- trait
- Source:
- MetricsOps.scala
- Graph
- Supertypes
- Self type
- MetricsOps.type
Members list
Value members
Concrete methods
Given an exclude function, return a 'classifier' function, i.e. for application in org.http4s.server/client.middleware.Metrics#apply.
Given an exclude function, return a 'classifier' function, i.e. for application in org.http4s.server/client.middleware.Metrics#apply.
Let's say you want a classifier that excludes integers since your paths consist of:
- GET /users/{integer} = GET_users_*
- POST /users = POST_users
- PUT /users/{integer} = PUT_users_*
- DELETE /users/{integer} = DELETE_users_*
In such a case, we could use:
classifierFMethodWithOptionallyExcludedPath( exclude = { str: String => scala.util.Try(str.toInt).isSuccess }, excludedValue = "*", intercalateValue = "_" )
Chris Davenport notes the following on performance considerations of exclude's function value:
It's worth noting that this runs on every segment of a path. So note that if an intermediate Throwables with Stack traces is known and discarded, there may be a performance penalty, such as the above example with Try(str.toInt). I benchmarked some approaches and regex matches should generally be preferred over Throwable's in this position.
Attributes
- exclude
For a given String, namely a path value, determine whether the value gets excluded.
- excludedValue
Indicates the String value to be supplied for an excluded path's field.
- pathSeparator
Value to use for separating the metrics fields' values
- Returns:
Request[F] => Option[String]
- Source:
- MetricsOps.scala