Added the facilities for logging a stack trace.

git-svn-id: https://samskivert.googlecode.com/svn/trunk@25 6335cc39-0255-0410-8fd6-9bcaacd3b74c

projects/samskivert/src/java/com/samskivert/util/DefaultLogProvider.java

@@ -1,5 +1,5 @@
 //
-// $Id: DefaultLogProvider.java,v 1.1 2000/12/06 03:21:59 mdb Exp $
+// $Id: DefaultLogProvider.java,v 1.2 2000/12/07 06:13:59 mdb Exp $
 
 package com.samskivert.util;
 
@@ -9,6 +9,9 @@ import java.util.Hashtable;
  * If no log provider is registered with the log services, the default
  * provider will be used. The default provider simple logs messages to
  * <code>System.err</code> and manages log levels in a simplistic way.
+ *
+ * @see Log
+ * @see LogProvider
  */
 public class DefaultLogProvider implements LogProvider
 {
@@ -21,6 +24,16 @@ public class DefaultLogProvider implements LogProvider
 	}
     }
 
+    public void logStackTrace (int level, String moduleName, Throwable t)
+    {
+	Integer tlevel = (Integer)_levels.get(moduleName);
+	if ((tlevel != null && level >= tlevel.intValue()) ||
+	    (level >= _level)) {
+	    System.err.println(moduleName + ": " + t.getMessage());
+	    t.printStackTrace(System.err);
+	}
+    }
+
     public void setLevel (String moduleName, int level)
     {
 	_levels.put(moduleName, new Integer(level));

projects/samskivert/src/java/com/samskivert/util/Log.java

@@ -1,5 +1,5 @@
 //
-// $Id: Log.java,v 1.2 2000/12/06 03:21:59 mdb Exp $
+// $Id: Log.java,v 1.3 2000/12/07 06:13:59 mdb Exp $
 
 package com.samskivert.util;
 
@@ -57,6 +57,16 @@ public final class Log
 	_provider.log(WARNING, _moduleName, message);
     }
 
+    /**
+     * Logs the stack trace of the supplied throwable at the specified
+     * level (if the current log level for this module is at or below the
+     * specified level).
+     */
+    public void logStackTrace (int level, Throwable t)
+    {
+	_provider.logStackTrace(level, _moduleName, t);
+    }
+
     /**
      * Sets the log level of the specified module to the specified
      * value. The log level indicates which messages are logged and which

projects/samskivert/src/java/com/samskivert/util/LogProvider.java

@@ -1,5 +1,5 @@
 //
-// $Id: LogProvider.java,v 1.1 2000/12/06 00:24:46 mdb Exp $
+// $Id: LogProvider.java,v 1.2 2000/12/07 06:13:59 mdb Exp $
 
 package com.samskivert.util;
 
@@ -16,6 +16,13 @@ public interface LogProvider
      */
     public void log (int level, String moduleName, String message);
 
+    /**
+     * Log the stack trace of the supplied throwable at the specified
+     * level for the specified module, if messages are enabled for that
+     * particular combination.
+     */
+    public void logStackTrace (int level, String moduleName, Throwable t);
+
     /**
      * Set the log level for the specified module to the specified
      * level. The log services assume that all messages at or higher than