1 files changed, 175 insertions, 0 deletions
diff --git a/common/src/main/java/at/gv/egovernment/moa/logging/Logger.java b/common/src/main/java/at/gv/egovernment/moa/logging/Logger.java
new file mode 100644
index 000000000..eb7aa5634
--- /dev/null
+++ b/common/src/main/java/at/gv/egovernment/moa/logging/Logger.java
@@ -0,0 +1,175 @@
+package at.gv.egovernment.moa.logging;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+/**
+ * A utility class acting as a facade to the logging subsystem.
+ * 
+ * Configure the logging defaultHierarchy that the <code>Logger</code> uses by
+ * calling <code>setHierarchy</code> once before calling any of the logging
+ * output functions.
+ * 
+ * @author Patrick Peck
+ * @version $Id$
+ */
+public class Logger {
+  
+  /** The default logging hierarchy. */
+  private static String defaultHierarchy = "";
+  
+  /**
+   * Get the <code>Log</code> object for the default hierarchy.
+   * 
+   * @return The <code>Log</code> object to write log messages to.
+   */
+  private static Log getLog() {
+    return LogFactory.getLog(defaultHierarchy);
+  }
+
+  /**
+   * Get the <code>Log</code> object for a given hierarchy.
+   * 
+   * @param hierarchy The logging hierarchy for which to return the logger. 
+   * @return The <code>Log</code> object to write log messages to.
+   */
+  private static Log getLog(String hierarchy) {
+    return LogFactory.getLog(hierarchy);
+  }
+  
+  /**
+   * Set the default hierarchy to which the <code>Logger</code> should send its
+   * logging output.
+   * @param hierarchy The logging defaultHierarchy.
+   */
+  public static void setHierarchy(String hierarchy) {
+    defaultHierarchy = hierarchy;
+  }
+
+  /**
+   * Test, if the trace log level is enabled.
+   * 
+   * @return boolean <code>true</code>, if tracing output is enabled
+   * <code>false</code> otherwise.
+   */
+  public static boolean isTraceEnabled() {
+    return getLog().isTraceEnabled();
+  }
+  
+  /**
+   * Test, if the trace log level is enabled for a given hierarchy.
+   * 
+   * @param hierarchy requested log hierarchy
+   * @return boolean <code>true</code>, if tracing output is enabled
+   * <code>false</code> otherwise.
+   */
+  public static boolean isTraceEnabled(String hierarchy) {
+    return getLog(hierarchy).isTraceEnabled();
+  }
+  
+  /**
+   * Trace a message.
+   * 
+   * @param message The message to trace.
+   */
+  public static void trace(Object message) {
+    getLog().trace(message);
+  }
+  
+  /**
+   * Test, if the debug log level is enabled.
+   * 
+   * @return boolean <code>true</code>, if debug output is enabled
+   * <code>false</code> otherwise.
+   */
+  public static boolean isDebugEnabled() {
+    return getLog().isDebugEnabled();
+  }
+  
+  /**
+   * Test, if the debug log level is enabled for a given hierarchy.
+   * 
+   * @param hierarchy requested log hierarchy
+   * @return boolean <code>true</code>, if debug output is enabled
+   * <code>false</code> otherwise.
+   */
+  public static boolean isDebugEnabled(String hierarchy) {
+    return getLog(hierarchy).isDebugEnabled();
+  }
+  
+  /**
+   * Log a debug message.
+   * 
+   * @param message The message to log.
+   */
+  public static void debug(Object message) {
+    getLog().debug(message);
+  }
+  
+  /**
+   * Log an info message.
+   * 
+   * @param message The message to log.
+   */
+  public static void info(Object message) {
+    getLog().info(message);
+  }
+  
+  /**
+   * Log a warning message.
+   * 
+   * @param message The message to log.
+   */
+  public static void warn(Object message) {
+    getLog().warn(message);
+  }
+
+  /**
+   * Log a warning message.
+   * 
+   * @param message The message to log.
+   * @param t An exception that may be the cause of the warning.
+   */
+  public static void warn(Object message, Throwable t) {
+    getLog().warn(message, t);
+  }
+  
+  /**
+   * Log an error message.
+   * 
+   * @param message The message to log.
+   */
+  public static void error(Object message) {
+    getLog().error(message);
+  }
+
+  /**
+   * Log an error message.
+   * 
+   * @param message The message to log.
+   * @param t An exception that may be the cause of the error.
+   */
+  public static void error(Object message, Throwable t) {
+    getLog().error(message, t);
+  }
+  
+  /**
+   * Log a fatal error message.
+   * 
+   * @param message The message to log.
+   */
+  public static void fatal(Object message) {
+    getLog().fatal(message);
+  }
+
+  /**
+   * Log a fatal error message.
+   * 
+   * @param message The message to log.
+   * @param t An exception that may be the cause of the error.
+   */
+  public static void fatal(Object message, Throwable t) {
+    getLog().fatal(message, t);
+  }
+
+}