chrisvest

import org.junit.Test;

import java.lang.ref.WeakReference;

import static org.junit.Assert.assertNull;

public class ThreadLocalWeakRefTest {
  /**
   * Many Java web servers and containers go out of their way to find and null
   * out ThreadLocals that an application might have created. Question is, is

chrisvest

About PrintCompilation

This note tries to document the output of PrintCompilation flag in HotSpot VM. It was originally intended to be a reply to a blog post on PrintCompilation from Stephen Colebourne. It's kind of grown too big to fit as a reply, so I'm putting it here.

Written by: Kris Mok rednaxelafx@gmail.com

Most of the contents in this note are based on my reading of HotSpot source code from OpenJDK and experimenting with the VM flags; otheres come from HotSpot mailing lists and other reading materials listed in the "References" section.

This

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import javax.tools.*;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Method;
import java.net.URI;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;

chrisvest

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix

chrisvest

package com.tinymolly;

import java.awt.*;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Queue;
import java.util.Set;

public class Main {

chrisvest

[chris@flowerpot:~]$ git clone https://github.com/spacejam/rio.git
Cloning into 'rio'...
remote: Enumerating objects: 22, done.
remote: Counting objects: 100% (22/22), done.
remote: Compressing objects: 100% (16/16), done.
remote: Total 514 (delta 6), reused 14 (delta 5), pack-reused 492
Receiving objects: 100% (514/514), 112.48 KiB | 643.00 KiB/s, done.
Resolving deltas: 100% (274/274), done.
[chris@flowerpot:~]$ cd rio
[chris@flowerpot:~/rio (master)]$ cargo test

chrisvest

Sample service script for debianoids

Look at LSB init scripts for more information.

Usage

Copy to /etc/init.d:

# replace "$YOUR_SERVICE_NAME" with your service's name (whenever it's not enough obvious)

chrisvest

Jul 25 11:20:12 flowerpot upowerd[1829]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/bluetooth/hci0/hci0:256/0005:05AC:030E.001B
Jul 25 11:20:13 flowerpot kernel: magicmouse 0005:05AC:030E.001C: unknown main item tag 0x0
Jul 25 11:20:13 flowerpot kernel: input: Touchy-Feely as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/bluetooth/hci0/hci0:512/0005:05AC:030E.001C/input/input38
Jul 25 11:20:13 flowerpot kernel: magicmouse 0005:05AC:030E.001C: input,hidraw2: BLUETOOTH HID v1.60 Mouse [Touchy-Feely] on b4:6b:fc:31:1b:3f
Jul 25 11:20:13 flowerpot upowerd[1829]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/bluetooth/hci0/hci0:512/0005:05AC:030E.001C
Jul 25 11:20:13 flowerpot upowerd[1829]: treating change event as add on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/bluetooth/hci0/hci0:512/0005:05AC:030E.001C/power_supply/hid-d8:96:95:e3:fa:64-battery

chrisvest

uname -a && echo $'O_RDONLY\nO_RDWR\nSEEK_SET\nSEEK_END\nEBADF\nEINVAL\nENXIO\nEOVERFLOW\nESPIPE\nEACCES\nEAGAIN\nEDQUOT\nEEXIST\nEFAULT\nEINTR\nEIO\nEISDIR\nELOOP\nEMFILE\nENAMETOOLONG\nENFILE\nENOENT\nENOSPC\nENOTDIR\nEOPNOTSUPP\nEROFS\nEFBIG\nEPIPE\nEWOULDBLOCK' | gcc -imacrosunistd.h -imacrosfcntl.h -imacrossys/errno.h -E - | tail -n 29

chrisvest

    void popAll( Consumer<Object> consumer ) {
        Node nodes = stack.getAndSet( END );
        while ( nodes != END ) {
            consumer.accept( nodes.value );
            Node next;
            do {
                next = nodes.next;
            } while ( next == null );
            nodes = next;
        }