Author: pferraro Date: 2009-03-16 21:42:10 -0400 (Mon, 16 Mar 2009) New Revision: 2365 Modified: trunk/mod_cluster/src/demo/java/org/jboss/modcluster/demo/servlet/HeapMemoryLoadServlet.java Log: Use MemoryMXBean, not Runtime methods. Modified: trunk/mod_cluster/src/demo/java/org/jboss/modcluster/demo/servlet/HeapMemoryLoadServlet.java =================================================================== --- trunk/mod_cluster/src/demo/java/org/jboss/modcluster/demo/servlet/HeapMemoryLoadServlet.java 2009-03-17 01:41:39 UTC (rev 2364) +++ trunk/mod_cluster/src/demo/java/org/jboss/modcluster/demo/servlet/HeapMemoryLoadServlet.java 2009-03-17 01:42:10 UTC (rev 2365) @@ -22,6 +22,10 @@ package org.jboss.modcluster.demo.servlet; import java.io.IOException; +import java.lang.management.ManagementFactory; +import java.lang.management.MemoryUsage; +import java.util.ArrayList; +import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @@ -46,22 +50,27 @@ System.gc(); - long free = Runtime.getRuntime().freeMemory() / 2; + MemoryUsage usage = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage(); - @SuppressWarnings("unused") - Object array = null; + long max = usage.getMax(); + long total = (max >= 0) ? max : usage.getCommitted(); + long free = total - usage.getUsed(); + // Reserve half the available free memory + long reserve = free / 2; + + List<Object> list = new ArrayList<Object>(2); + if (free > Integer.MAX_VALUE) { - array = new byte[Integer.MAX_VALUE][(int) free / Integer.MAX_VALUE]; + list.add(new byte[(int) (reserve / Integer.MAX_VALUE)][Integer.MAX_VALUE]); } - else - { - array = new byte[(int) free]; - } + list.add(new byte[(int) (reserve % Integer.MAX_VALUE)]); + try { + Thread.sleep(duration); } catch (InterruptedException e) @@ -69,7 +78,7 @@ Thread.currentThread().interrupt(); } - array = null; + list.clear(); System.gc();