JAL-3949 An attempt at converting to Log4j 2 -- no output achieved!

[jalview.git] / src / jalview / util / Log4j.java

diff --git a/src/jalview/util/Log4j.java b/src/jalview/util/Log4j.java
new file mode 100644 (file)
index 0000000..e6c660b
--- /dev/null
+++ b/src/jalview/util/Log4j.java
@@ -0,0 +1,52 @@
+package jalview.util;
+
+import java.util.Map;
+
+import org.apache.logging.log4j.Level;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.core.Appender;
+import org.apache.logging.log4j.core.LoggerContext;
+import org.apache.logging.log4j.core.config.Configuration;
+import org.apache.logging.log4j.core.config.LoggerConfig;
+
+public class Log4j
+{
+  public static void setLevel(Logger logger, Level level)
+  {
+    LoggerContext context = (LoggerContext) LogManager.getContext(false);
+    Configuration config = context.getConfiguration();
+    LoggerConfig loggerConfig = config.getLoggerConfig(logger.getName());
+    loggerConfig.setLevel(level);
+  }
+
+  public static void setRootLevel(Level level)
+  {
+    setLevel(LogManager.getRootLogger(), level);
+  }
+
+  public static void addAppender(Logger logger, Logger logger2,
+          String name2)
+  {
+    LoggerContext context = (LoggerContext) LogManager.getContext(false);
+    Configuration config = context.getConfiguration();
+    LoggerConfig logger2Config = config.getLoggerConfig(logger2.getName());
+    Map<String, Appender> logger2AppendersMap = logger2Config
+            .getAppenders();
+    Appender appender = logger2AppendersMap.get(name2);
+    addAppender(logger, appender);
+  }
+
+  public static void addAppender(Logger logger, Appender appender)
+  {
+    LoggerContext context = (LoggerContext) LogManager.getContext(false);
+    Configuration config = context.getConfiguration();
+    LoggerConfig loggerConfig = config.getLoggerConfig(logger.getName());
+    loggerConfig.addAppender(appender, null, null);
+  }
+
+  public static void addAppenderToRootLogger(Appender appender)
+  {
+    Log4j.addAppender(LogManager.getRootLogger(), appender);
+  }
+}