brettwooldridge’s gists

brettwooldridge / zfs_report.pl

Created May 4, 2020 14:23

ZFS and Smartctl status email script

	#!/bin/env perl

	use feature qw(say);

	our %smartctl_raw;

	say '<html><body><pre style="font-size: smaller">';

	_build_smartctl(18);
	_build_smartctl(34);

brettwooldridge / Java2Kotlin.md

Last active November 15, 2018 09:33

Java to Kotlin comparison... just anecdotal:

Interesting Kotlin/Java comparison ... this Java:

         XMLOutputFactory factory = XMLOutputFactory.newInstance();
         XMLStreamWriter xmlWriter = factory.createXMLStreamWriter(writer);

         xmlWriter.writeStartDocument();
         xmlWriter.writeStartElement("html");
         xmlWriter.writeStartElement("head");

         xmlWriter.writeStartElement("title");

brettwooldridge / ProcessTest.java

Last active May 8, 2023 07:03

JNA call to JVM internal JNI method failing

	package com.zaxxer.jna;

	import com.sun.jna.JNIEnv;
	import com.sun.jna.Library;
	import com.sun.jna.Native;
	import com.sun.jna.NativeLibrary;

	import java.util.HashMap;
	import java.util.Map;
	import java.util.TreeMap;

brettwooldridge / Issue1118.java

Last active March 20, 2018 16:40

HikariCP Issue1118

	package com.zaxxer.hikari.benchmark;

	import com.zaxxer.hikari.HikariConfig;
	import com.zaxxer.hikari.HikariDataSource;

	import java.sql.*;
	import java.util.concurrent.ThreadLocalRandom;

	/**
	* docker run --name some-mysql -e MYSQL_USER=brettw -e MYSQL_PASSWORD=secret -e MYSQL_DATABASE=issue1118 -e MYSQL_ALLOW_EMPTY_PASSWORD=yes -p 3306:3306 -d mysql:5.5

brettwooldridge / Useful.MD

Last active May 25, 2017 05:03

Useful tools and commands

$ brew install webkit2png
$ webkit2png https://someweb.site/url

brettwooldridge / DigestTest.java

Last active May 5, 2017 15:18

Cheap Java SHA1 Digest speed test

	public class DigestTest
	{
	@Test
	public void test() {
	String sql = "SELECT count(ZDeviceLite.device_id) FROM device ZDeviceLite";

	// This variable is meaningless and only used for benchmarking, to prevent the
	// JVM from optimizing away the loops below due to non-use of the returned types.
	int hash = 0;

brettwooldridge / Issue828.java

Created February 22, 2017 11:56

HikariCP Issue#828

	package com.zaxxer.hikari.pool;

	import java.sql.Connection;
	import java.sql.DriverManager;
	import java.sql.ResultSet;
	import java.sql.SQLException;
	import java.sql.Statement;

	import org.junit.Test;
	import org.postgresql.PGConnection;

brettwooldridge / genclient

Created October 28, 2015 03:16 — forked from wsargent/genclient

Create a working(!) client certificate for use with nginx, using only keytool

	#!/bin/bash

	export PW=`pwgen -Bs 10 1`

	echo "$PW" > password

	# Create a self signed certificate & private key to create a root certificate authority.
	keytool -genkeypair -v \
	-alias clientCA \
	-keystore client.jks \

brettwooldridge / ThreadStartMicro.java

Created October 2, 2015 06:00

JMH Benchmark to measure thread launch time overhead

	package com.zaxxer.miscmicro;

	import java.util.concurrent.TimeUnit;

	import org.openjdk.jmh.annotations.Benchmark;
	import org.openjdk.jmh.annotations.BenchmarkMode;
	import org.openjdk.jmh.annotations.Level;
	import org.openjdk.jmh.annotations.Measurement;
	import org.openjdk.jmh.annotations.Mode;
	import org.openjdk.jmh.annotations.OutputTimeUnit;

brettwooldridge / MoreInterceptors.java

Created September 4, 2015 04:30

	public class InterceptorDataSource implements InvocationHandler {
	private final DataSource delegate;

	private InterceptorDataSource(final DataSource delegate) {
	this.delegate = delegate;
	}

	public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
	return (method.getName().equals("getConnection")) ? getConnection() : method.invoke(delegate, args);
	}

Brett Wooldridge brettwooldridge