Many web/mobile applications generate huge amount of event logs (c,f. login, logout, purchase, follow, etc). To analyze these event logs could be really valuable for improving the service. However, the challenge is collecting these logs easily and reliably.

Fluentd solves that problem by having: easy installation, small footprint, plugins, reliable buffering, log forwarding, etc.

fluent-logger-scala is a Scala library, to record the events from Scala application, based on fluent-logger-java. Main difference between scala and java version is to support Scala Collection.

Please see QuickStart to get started!

Add sonatype repository and dependencies to build.sbt file as follows:

resolvers += "Apache Maven Central Repository" at "http://repo.maven.apache.org/maven2/"

libraryDependencies += "org.fluentd" % "fluent-logger-scala_<scala_version>" % "0.5.1"

Please replace <scala_version> with scala compiler version you use. Currently, <scala_version> can be replaced with 2.10 or 2.11. For instance,

libraryDependencies += "org.fluentd" % "fluent-logger-scala_2.10" % "0.5.1"

or

libraryDependencies += "org.fluentd" % "fluent-logger-scala_2.11" % "0.5.1"

We provide old version of fluent-logger-scala for scala 2.9.

libraryDependencies += "org.fluentd" % "fluent-logger-scala_2.9.0" % "0.4.0"

or

libraryDependencies += "org.fluentd" % "fluent-logger-scala_2.9.1" % "0.4.0"

or

libraryDependencies += "org.fluentd" % "fluent-logger-scala_2.9.2" % "0.4.0"

APIs base on fluent-logger-java.

FluentLoggerFactory#getLogger(tag: String): FluentLogger
FluentLoggerFactory#getLogger(tag: String, host: String, port: Int): FluentLogger
FluentLoggerFactory#getLogger(tag: String, host: String, port: Int, timeout: Int, bufferCapacity: Int): FluentLogger
FluentLoggerFactory#flushAll(): Unit
FluentLoggerFactory#closeAll(): Unit

FluentLogger#log(label: String, key: String, value: Any): Boolean
FluentLogger#log(label: String, key: String, value: Any, timestamp: Long): Boolean
FluentLogger#log(tag:String, mutableMap/immutableMap[String, Any]):Boolean
FluentLogger#flush()
FluentLogger#close()

./sbt update
./sbt compile

./sbt test

Describe your account information in $HOME/.sbt/(sbt-version)/sonatype.sbt file:

credentials += Credentials("Sonatype Nexus Repository Manager",
    "oss.sonatype.org",
    "(Sonatype user name)",
    "(Sonatype password)")

Then publish a signed artifact to the Sonatype repository:

./sbt publishSigned

Make sure you are using a release version in build.sbt file. A SNAPSHOT version is deployed to the snapshot repostitory of Sonatype, which is not synched with Maven central.

After publishing, you can close, promote and drop the published repositorty with sonatypeRelease command:

./sbt sonatypeRelease

• Copyright © 2011- Tsuyoshi Ozawa and Taro L. Saito
• Apache License, Version 2.0

This document is inspired by fluent-logger-python