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/*
* Copyright 2019-2024 John A. De Goes and the ZIO Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package zio
package object logging extends LoggerLayers {
/**
* The [[logContext]] fiber reference is used to store typed, structured log
* annotations, which can be utilized by backends to enrich log messages.
*
* Because [[logContext]] is an ordinary [[zio.FiberRef]], it may be get, set,
* and updated like any other fiber reference. However, the idiomatic way to
* interact with [[logContext]] is by using [[zio.logging.LogAnnotation]].
*
* For example:
*
* {{{
* myResponseHandler(request) @@ UserId(request.userId)
* }}}
*
* This code would add the structured log annotation [[LogAnnotation.UserId]]
* to all log messages emitted by the `myResponseHandler(request)` effect.
*/
val logContext: FiberRef[LogContext] =
zio.Unsafe.unsafe { implicit u =>
FiberRef.unsafe.make(LogContext.empty, ZIO.identityFn[LogContext], (old, newV) => old ++ newV)
}
/**
* log aspect annotation key for logger name
*/
val loggerNameAnnotationKey = "logger_name"
val loggerConfigPath: NonEmptyChunk[String] = NonEmptyChunk("logger")
/**
* Logger name aspect, by this aspect is possible to set logger name (in general, logger name is extracted from [[Trace]])
*
* annotation key: [[zio.logging.loggerNameAnnotationKey]]
*/
def loggerName(value: String): ZIOAspect[Nothing, Any, Nothing, Any, Nothing, Any] =
ZIOAspect.annotated(loggerNameAnnotationKey, value)
implicit final class LogAnnotationZIOSyntax[R, E, A](private val self: ZIO[R, E, A]) {
def logAnnotate[V: Tag](key: LogAnnotation[V], value: V): ZIO[R, E, A] =
self @@ key(value)
}
implicit final class ZLoggerOps[-Message, +Output](private val self: ZLogger[Message, Output]) {
/**
* Returns a version of logger that only logs messages when this filter is satisfied
*/
def filter[M <: Message](filter: LogFilter[M]): ZLogger[M, Option[Output]] = FilteredLogger(self, filter)
}
}
