MemoryFootprint.java

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package org.gffs.application;
 
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
 
import net.sourceforge.sizeof.SizeOf;
 
public class MemoryFootprint
{
  static private Log _logger = LogFactory.getLog(MemoryFootprint.class);
 
  // static SizeOf _sizeEstimater = new SizeOf();
  static {
    // don't count statics in the memory size.
    SizeOf.skipStaticField(true);
    // only complain about large objects if they're bigger than the limit below.
    SizeOf.setMinSizeToLog(5 * 1024 * 1024);
  }
 
  public static long getFootprint(Object o)
  {
    if (!_logger.isDebugEnabled()) {
      _logger.error("abusive memory footprint called when not in debug mode.  a logging statement is wrong.");
      return 0;
    }
    try {
      return SizeOf.sizeOf(o);
    } catch (Exception e) {
      _logger.debug("error retrieving SizeOf object; is SizeOf.jar in javaagent?");
      return 0;
    }
  }
 
  public static long getDeepFootprint(Object o)
  {
    if (!_logger.isDebugEnabled()) {
      _logger.error("abusive memory footprint called when not in debug mode.  a logging statement is wrong.");
      return 0;
    }
 
    try {
      return SizeOf.deepSizeOf(o);
    } catch (Exception e) {
      _logger.debug("error retrieving SizeOf object; is SizeOf.jar in javaagent?");
      return 0;
    }
  }
}