airframe-log: Support setting the root log level with _root_ logger n…

…ame (#1788)
wvlet · Aug 14, 2021 · 7b44e4e · 7b44e4e
1 parent 53e3186
commit 7b44e4e
Show file tree

Hide file tree

Showing 3 changed files with 25 additions and 2 deletions.
diff --git a/airframe-log/src/main/scala/wvlet/log/Logger.scala b/airframe-log/src/main/scala/wvlet/log/Logger.scala
@@ -264,7 +264,11 @@ object Logger {
     for ((loggerName, level) <- logLevels.asScala) {
       LogLevel.unapply(level) match {
         case Some(lv) =>
-          Logger(loggerName).setLogLevel(lv)
+          if (loggerName == "_root_") {
+            rootLogger.setLogLevel(lv)
+          } else {
+            Logger(loggerName).setLogLevel(lv)
+          }
         case None =>
           Console.err.println(s"Unknown loglevel ${level} is specified for ${loggerName}")
       }

diff --git a/airframe-log/src/test/scala/wvlet/airframe/log/LogTest.scala b/airframe-log/src/test/scala/wvlet/airframe/log/LogTest.scala
@@ -12,7 +12,10 @@
  * limitations under the License.
  */
 package wvlet.airframe.log
-import wvlet.log.{LogSupport, Spec}
+import wvlet.log.{LogLevel, Logger, Spec}
+
+import java.io.StringReader
+import java.util.Properties
 
 /**
   */
@@ -24,4 +27,16 @@ class LogTest extends Spec {
     wvlet.airframe.log.initNoColor
     debug("hello")
   }
+
+  test("Test setting root log level") {
+    val p            = new Properties()
+    val rootLogLevel = Logger.getDefaultLogLevel
+    try {
+      p.load(new StringReader("_root_ = trace"))
+      Logger.setLogLevels(p)
+      Logger.getDefaultLogLevel shouldBe LogLevel.TRACE
+    } finally {
+      Logger.setDefaultLogLevel(rootLogLevel)
+    }
+  }
 }
diff --git a/docs/airframe-log.md b/docs/airframe-log.md
@@ -115,6 +115,10 @@ com.amazonaws=info
 ```
 The format follows [Java Properties file format](https://docs.oracle.com/javase/7/docs/api/java/util/Properties.html#load(java.io.Reader)).
 
+To specify a root log level, use `_root_` keyword: 
+```scala
+_root_=debug
+```
 
 In default, loglevel file will be found in this order: