MONDRIAN: Replace the simple logger, mondrian/olap/Log.java, with log4j.

       The abstract base classes define the method:
           protected abstract Logger getLogger();
       which is defined in derived classes thus allowing the base class
       to use the derived class' logger.
       The CmdRunner now allow the querying and setting of log4j loggers.
       The log4j.properties is an example log4j configuration file. To
       use it one must define the system property, log4j.configuration,
       with the url of the file, i.e., 
           log4j.configuration=file://$MONDRIAN_HOME/log4j.properties

[git-p4: depot-paths = "//open/mondrian/": change = 3271]

log4j.properties

@@ -0,0 +1,19 @@
+#
+# Example log4j properties file
+#
+# $Id$
+#
+# Set root logger level to DEBUG and its only appender to MONDRIAN.
+log4j.rootLogger=WARN, MONDRIAN
+
+# MONDRIAN is set to be a ConsoleAppender.
+log4j.appender.MONDRIAN=org.apache.log4j.ConsoleAppender
+
+# MONDRIAN uses PatternLayout.
+log4j.appender.MONDRIAN.layout=org.apache.log4j.PatternLayout
+log4j.appender.MONDRIAN.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
+
+
+
+# Example of setting on a class basis
+#log4j.category.mondrian.rolap.RolapCube=DEBUG, MONDRIAN

src/main/mondrian/olap/ConnectionBase.java

@@ -12,6 +12,8 @@
 
 package mondrian.olap;
 
+import org.apache.log4j.Logger;
+
 /**
  * <code>ConnectionBase</code> implements some of the methods in
  * {@link Connection}.
@@ -26,6 +28,8 @@ public abstract class ConnectionBase implements Connection
     protected ConnectionBase() {
     }
 
+    protected abstract Logger getLogger();
+
     public String getFullConnectString()
     {
         String s = getConnectString(),

src/main/mondrian/olap/DimensionBase.java

@@ -26,6 +26,7 @@ public abstract class DimensionBase
     extends OlapElementBase
     implements Dimension
 {
+
     protected final String name;
     protected final String uniqueName;
     protected final String description;
@@ -79,7 +80,7 @@ public OlapElement lookupChild(SchemaReader schemaReader, String s)
             oe = getHierarchy().lookupChild(schemaReader, s);
         }
 
-        if (Log.isTrace()) { 
+        if (getLogger().isDebugEnabled()) { 
             StringBuffer buf = new StringBuffer(64);
             buf.append("DimensionBase.lookupChild: ");
             buf.append("name=");
@@ -91,7 +92,7 @@ public OlapElement lookupChild(SchemaReader schemaReader, String s)
             } else {
                 buf.append(" returning elementname="+oe.getName());
             }
-            Log.trace(buf.toString());
+            getLogger().debug(buf.toString());
         }
 
 

src/main/mondrian/olap/HierarchyBase.java

@@ -92,7 +92,7 @@ public OlapElement lookupChild(SchemaReader schemaReader, String s)
         if (oe == null) {
             oe = Util.lookupHierarchyRootMember(schemaReader, this, s);
         }
-        if (Log.isTrace()) {
+        if (getLogger().isDebugEnabled()) {
             StringBuffer buf = new StringBuffer(64);
             buf.append("HierarchyBase.lookupChild: ");
             buf.append("name=");
@@ -104,7 +104,7 @@ public OlapElement lookupChild(SchemaReader schemaReader, String s)
             } else {
                 buf.append(" returning elementname="+oe.getName());
             }
-            Log.trace(buf.toString());
+            getLogger().debug(buf.toString());
         }
         return oe;
     }