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com.twitter.util.logging

Slf4jBridgeUtility

object Slf4jBridgeUtility extends Logging

A utility to safely install the slf4j-api SLF4JBridgeHandler. The utility attempts to detect if the slf4j-jdk14 dependency is present on the classpath as it is unwise to install the jul-to-slf4j bridge with the slf4j-jdk14 dependency present as it may cause an infinite loop.

If the SLF4JBridgeHandler is already installed we do not try to install it again.

Additionally note there is a performance impact for bridging jul log messages in this manner. However, using the Logback LevelChangePropagator (> 0.9.25) can eliminate this performance impact.

See also

SLF4J: jul-to-slf4j bridge

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  5. def attemptSlf4jBridgeHandlerInstallation(): Unit

    Attempt installation of the slf4j-api SLF4JBridgeHandler.

    Attempt installation of the slf4j-api SLF4JBridgeHandler. The SLF4JBridgeHandler will not be installed if already installed or if the slf4j-jdk14 dependency is detected on the classpath.

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  11. def debugResult[T](message: ⇒ String)(fn: ⇒ T): T
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  18. def errorResult[T](message: ⇒ String)(fn: ⇒ T): T
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  22. def info(marker: Marker, message: ⇒ Any, cause: Throwable): Unit
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  23. def info(message: ⇒ Any, cause: Throwable): Unit
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  24. def info(marker: Marker, message: ⇒ Any): Unit
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  25. def info(message: ⇒ Any): Unit
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  26. def infoResult[T](message: ⇒ String)(fn: ⇒ T): T
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  38. final def logger: Logger
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  45. def trace(marker: Marker, message: ⇒ Any, cause: Throwable): Unit
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  49. def traceResult[T](message: ⇒ String)(fn: ⇒ T): T
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