Author: sijskes
Date: Wed Apr 10 11:14:30 2013
New Revision: 1466426
URL: http://svn.apache.org/r1466426
Log:
incomplete heapdumper code drop
Added:
river/jtsk/skunk/sijskes/SimpleJeri/Heapdumper.java
Added: river/jtsk/skunk/sijskes/SimpleJeri/Heapdumper.java
URL:
http://svn.apache.org/viewvc/river/jtsk/skunk/sijskes/SimpleJeri/Heapdumper.java?rev=1466426&view=auto
==============================================================================
--- river/jtsk/skunk/sijskes/SimpleJeri/Heapdumper.java (added)
+++ river/jtsk/skunk/sijskes/SimpleJeri/Heapdumper.java Wed Apr 10 11:14:30 2013
@@ -0,0 +1,72 @@
+/*
+ * Heapdumper.java
+ *
+ * Created on 09-Nov-2012 11:44:07 by sim
+ *
+ */
+
+package nl.qcg.util.debug;
+
+import java.io.File;
+import java.lang.management.ManagementFactory;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import javax.management.MBeanServer;
+import javax.management.ObjectName;
+import nl.qcg.util.logging.LogUtil;
+
+/**
+ *
+ * @author sim
+ */
+public class Heapdumper
+{
+ private final static Logger logger = LogUtil.getLogger();
+
+ public static void generate( boolean gc )
+ {
+ try {
+ generate0(gc);
+ } catch (Exception ex) {
+ logger.log(Level.SEVERE, null, ex);
+ }
+ }
+
+ public static void generate0( boolean gc ) throws Exception
+ {
+ MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
+
+ ObjectName nm = new
ObjectName("com.sun.management:type=HotSpotDiagnostic");
+
+ String filename = findFreeSlot() ;
+
+ mbs.invoke(nm, "dumpHeap", new Object[]{filename,gc}, new String[]{
String.class.getName(), boolean.class.getName()} );
+
+ logger.log( Level.INFO, "heapdump to {0} succesfull ", filename);
+ }
+
+ public static void main(String[] args)
+ {
+ generate(true);
+ }
+
+ private static String findFreeSlot()
+ {
+ File dir = new File( "dumps" );
+
+ dir.mkdirs();
+
+ for(int i=0;i<3;i++) {
+ File f = new File(dir,"heapdump-"+i+".bin");
+ if( !f.exists() ) {
+ return f.getAbsolutePath();
+ }
+ }
+ throw new RuntimeException("slots exhausted");
+ }
+
+ private Heapdumper()
+ {
+ }
+
+}
