Re: a simpler logger [?]

[Mark Wielaard <mark@klomp.org>]

Hi,

While helping Phil figuring out what part of his code was called (over
and over again) from where we came up with the following small extension
of the rsl:

--- a/frysk-sys/frysk/rsl/Log.java
+++ b/frysk-sys/frysk/rsl/Log.java
@@ -420,4 +420,24 @@ public final class Log {
            return;
        prefix(self); print(p1); print(p2); print(p3); print(p4); print(p5); pri
     }
+
+  /**
+   * Convenience method to get the caller of a method in which you
+   * use the Log object. Returns the caller (of the caller) of this
+   * method as String or "<unknown>" if caller cannot be found or if
+   * logger isn't logging. Use as:
+   * <code>log.log(this, "method called by ", log.caller());</code>.
+   */
+  public String caller()
+  {
+    if (logging)
+      {
+       Throwable t = new Throwable();
+       StackTraceElement[] stackTrace = t.getStackTrace();
+       if (stackTrace.length > 2)
+         return stackTrace[2].toString();
+      }
+
+    return "<unknown>";
+  }
 }

It was pretty useful so I would like to add it unless someone objects to
bloating the really simple logger. Maybe also with a variant that gives
the whole call stack (but again only creates it when logging of course).

Cheers,

Mark