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@helospark
helospark / SourceDataLineWriteHangs.java
Created May 8, 2021
Repro OpenJDK hanging bug on Linux (using ALSA) playback device. It doesn't always work with the same SIZE, delay, and stream size parameters on every machine. I guess it depends on sound hardware, buffers, etc.
View SourceDataLineWriteHangs.java
package com.test;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
/**
OpenJDK bug report:
View ExerciseBikeKcalToWh.java
package com.helospark.bike;
/**
* Calculates how many watts I have to generate to burn the amount of calories on my exercise bike generator.
* @author helospark
*/
public class ExerciseBikeKcalToWh {
static final int kcalEaten = 640;
public static void main(String[] args) {
View ExerciseBikeWhToKcal.java
package com.helospark.bike;
/**
* Calculates the amount of calories & body fat burned from generated electric power in my exercise bike generator.
* @author helospark
*/
public class ExerciseBikeWhToKcal {
static final int wh = 95;
public static void main(String[] args) {
@helospark
helospark / scrape_bet.sh
Created Sep 19, 2020
Scrape daily stock data from Budapest Stock Exchange (BÉT) and saves data to Graphite DB
View scrape_bet.sh
stocks="3564,4IG 6494,ALTEO 4042,ANY 6329,APPENINN 8208,AUTOWALLIS 424,BIF 6515,CIGPANNONIA 9864,DUNAHOUSE 4338,GSPARK 506,KONZUM 7217,MASTERPLAST 518,MOL 511,MTELEKOM 540,OPUS 528,OTP 546,PANNERGY 604,RABA 608,RICHTER 3263,TAKAREKJZB 11141,WABERERS 639,ZWACK"
curl -H 'User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:80.0) Gecko/20100101 Firefox/80.0' -v "https://bet.hu/oldalak/adatletoltes" > /tmp/out.html 2>&1
sessionid=`cat /tmp/out.html | grep JSESSIONID | sed 's/< set-cookie: JSESSIONID=//g' | sed 's/;.*//g'`
csrf=`cat /tmp/out.html | grep csrf | sed 's/\s\+<meta name="_csrf" content="//g' | sed 's/".*//g'`
defaultStart=`date --date="2 day ago" +"%Y.%m.%d."`
today=`date +"%Y.%m.%d."`
# Max is 5 years
startDate=$1
@helospark
helospark / SunExchangeCalculator.java
Last active Oct 9, 2019
Simulates return and results on the SunExchange
View SunExchangeCalculator.java
package com.helospark.invest;
import java.util.ArrayList;
import java.util.List;
/**
* Simulates return and results on the SunExchange.
*/
public class SunExchangeCalculator {
private static final double ZAR_TO_USD = 0.066;
@helospark
helospark / TestDialog.java
Created Aug 6, 2018
Darkest-dark theme missing CheckboxTableViewer
View TestDialog.java
package dialogtest.handlers;
import java.util.Arrays;
import javax.annotation.Generated;
import org.eclipse.jface.viewers.CheckboxTableViewer;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.ICheckStateProvider;
import org.eclipse.jface.viewers.TableViewerColumn;
@helospark
helospark / Main.java
Last active Jan 31, 2018
Java superpermutation finder
View Main.java
package com.helospark;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ConcurrentSkipListSet;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
@helospark
helospark / LogFileExposer.java
Created Sep 18, 2017
Expose a log file via HTTP
View LogFileExposer.java
package com.example;
import java.io.File;
import java.io.IOException;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
View FailingTestWithCollections.java
import static org.mockito.BDDMockito.given;
import java.util.ArrayList;
import java.util.Collection;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
@helospark
helospark / HsqlAutoserverManager.java
Last active May 30, 2017
Code to implement H2's ";AUTO_SERVER=true" functionality for HSQLDB
View HsqlAutoserverManager.java
package hsql_test;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;