Structured logging library for ZIO
Add Zilog to your dependencies
libraryDependencies += "com.github.mvv.zilog" %% "zilog" % "0.1-M14"If you plan to use custom compound structured arguments (like in the example
below), you might want to also add sredded-generic dependency for the
deriveStructured macro:
libraryDependencies += "com.github.mvv.sredded" %% "sredded-generic" % "0.1-M2" % ProvidedRunning the following example program
import com.github.mvv.sredded.StructuredMapping
import com.github.mvv.sredded.generic.deriveStructured
import com.github.mvv.zilog._
import zio.{App, ZEnv, ZIO}
final case class Request(src: String, method: String, path: String)
object Request {
implicit val structured: StructuredMapping[Request] = deriveStructured
}
object RequestKey extends Logging.Key[Request]("request")
object CorrelationIdKey extends Logging.Key[String]("correlationId")
object CustomerIdKey extends Logging.Key[Long]("customerId")
object LoggingApp extends App {
implicit val logger: Logger = Logger[LoggingApp.type]
override def run(args: List[String]): ZIO[ZEnv, Nothing, Int] =
{
log.withLogArgs(RequestKey(Request("src", "GET", "/foo")), CorrelationIdKey("someId")) {
log.info("Logic go brrrrr", CustomerIdKey(123))
}
} .provideCustomLayer(Logging.consoleJson()).as(0)
}should produce something like (as a single line)
{
"timestamp": "2020-05-01T00:00:00.000Z",
"fiberId": "#0",
"logger": "LoggingApp$",
"level": "INFO",
"message": "Logic go brrrrr",
"args": {
"request": {
"src": "src",
"method": "GET",
"path": "/foo"
},
"correlationId": "someId",
"customerId": 123
},
"stackTrace": null,
"sourceFile": "LoggingApp.scala",
"sourceClass": "LoggingApp",
"sourceMethod": "run",
"sourceLine": 20
}zilog-sagerallows you to accessLogginginstances in Sager environmentszilog-over-slf4jprovides aLoggingservice that uses SLF4J as a backend
