Mercurial > hg > blitz_condensed
view src/org/dancres/blitz/disk/BackoffGenerator.java @ 22:b7e52953b7a6
Add some cache/memory statistics to help spot potential exhaustion and other tuning issues.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Fri, 28 Aug 2009 17:23:33 +0100 |
parents | 3dc0c5604566 |
children |
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package org.dancres.blitz.disk; import java.util.Random; import java.util.logging.Level; import net.jini.config.ConfigurationException; import org.dancres.blitz.config.ConfigurationFactory; public class BackoffGenerator { private static final String LOAD_BACKOFF = "loadBackoff"; private static int BACKOFF_BASE; private static int BACKOFF_JITTER; static { try { int[] myBackoff = (int[]) ConfigurationFactory.getEntry(LOAD_BACKOFF, int[].class, new int[]{50, 50}); BACKOFF_BASE = myBackoff[0]; BACKOFF_JITTER = myBackoff[1]; } catch (ConfigurationException aCE) { RetryingUpdate.theLogger.log(Level.SEVERE, "Failed to load backoff config", aCE); } } private static Random theBackoffGenerator = new Random(); public static void pause() { try { Thread.sleep((long) (BACKOFF_BASE + theBackoffGenerator.nextInt(BACKOFF_JITTER))); } catch (InterruptedException anIE) { } } }